PUBLIC
PRODUCT
SPECIFICATION
TABLE
OF CONTENTS
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1 (1)
No.
1/1301-BMR465Technical Specification
Checked
Input 7.5 - 14 V, Output up to 90 A / 162 W
Date
6/9/2021
6/10/2021
Rev
1/28701-BMR465 Rev G
F
A
June 2021
© Flex
Key Features
• Small Package
Laydown: 50.8 x 19.05 x 10.0 mm (2.0 x 0.75 x 0.39 in)
SIP: 50.8 x 9.51 x 19.05 mm (2.0 x 0.37 x 0.75 in)
• Control loop with fast load transient response.
• 0.6 V - 1.8 V output voltage range
• High maximum output current, 90 A
• Current sharing up to 4 modules, 360 A
• High efficiency, typ. 94.3% at 12 Vin, 1.8 Vout, half load
• Configuration and monitoring via PMBus
• Phase synchronization & spreading
• Voltage tracking capability
• Margining up/down to +/-10%
• MTBF 14.95 Mh
General Characteristics
•
•
•
•
•
•
•
•
•
•
•
Configuration support via Flex Power Designer
Monotonic soft-start ramp up
Reduced external output decoupling capacitance
Input under-voltage & over-voltage shutdown
Output short-circuit & over voltage protection
Over temperature protection
Remote control & Power Good pins
Differential sense pins
Voltage setting via pin-strap or PMBus
ISO 9001/14001 certified supplier
Highly automated manufacturing ensures quality
Safety Approvals
Design for Environment
Meets requirements in hightemperature lead-free soldering
processes.
Contents
Ordering Information
General Information
Safety Specification
Internal Circuit Diagram
Pin Descriptions
Typical Application Circuit
............................................................. 2
............................................................. 2
............................................................. 3
............................................................. 4
............................................................. 5
............................................................. 7
Electrical Specification
90 A / 0.6-1.8 V
BMR 465 ............................................ 12
EMC Specification
PMBus Interface
Operating Information
Thermal Consideration
Mechanical Information
Soldering Information
Delivery Information
Product Qualification Specification
Appendix – PMBus Commands
........................................................... 18
........................................................... 19
........................................................... 22
........................................................... 29
........................................................... 31
........................................................... 34
........................................................... 35
........................................................... 37
........................................................... 38
PUBLIC
PRODUCT SPECIFICATION
Prepared (Subject resp)
No.
jidgezou George Zou
Checked
BMR465George
seriesZou
PoL Regulators
jidgezou
Date
6/9/2021
Input 7.5 - 14 V, Output up to 90 A / 162 W
Product program
BMR 465 n1010/001n8
Output
0.6-1.8 V, 90 A/162 W
Product number and Packaging
BMR 465 n1n2n3n4/n5n6n7n8
Options
/
n1
n2
n3
n4
Mounting
/
ο
ο
ο
n6
n7
n8
/
Packaging
/
Options
Description
n1
0
ο
ο
ο
ο
Horizontal through hole mounted
version (Laydown TH)
Horizontal surface mounted
version (Laydown SMD)
Vertical through hole mounted
version (Single in Line, SIP)
n2
0
1
Open frame
Open frame, 5.5 mm pin length
n3 n4
10
PMBus and pin strap
n5 n6 n7
001
CTRL pin positive logic (active
high)
n8
B
Antistatic tray of 144 products
(SIP)
Antistatic tape & reel of 130/or 80
products (Laydown TH and SMD)
C
Example: Product number BMR 465 0010/001C equals a through-hole
mounted, open frame, PMBus and analog pin strap, positive RC logic,
standard configuration variant, package tape&reel.
General Information
Reliability
The failure rate (λ) and mean time between failures
(MTBF= 1/λ) is calculated at max output power and an
operating ambient temperature (TA) of +40°C. Flex Power
Modules uses Telcordia SR-332 Issue 2 Method 1 to
calculate the mean steady-state failure rate and standard
deviation (σ).
Telcordia SR-332 Issue 3 also provides techniques to
estimate the upper confidence levels of failure rates based
on the mean and standard deviation.
Mean steady-state
Std. deviation, σ
λ
67 nFailures/h
F
June 2021
© Flex
The products are compatible with the relevant clauses and
requirements of the RoHS directive 2011/65/EU and have
a maximum concentration value of 0.1% by weight in
homogeneous materials for lead, mercury, hexavalent
chromium, PBB and PBDE and of 0.01% by weight in
homogeneous materials for cadmium.
Exemptions in the RoHS directive utilized in Flex Power
Modules products are found in the Statement of
Compliance document.
/
Configuration file
2
n5
/
ο
1
Rev
1/28701-BMR465 Rev G
Compatibility with RoHS requirements
Ordering Information
Digital interface
2 (4)
1/1301-BMR465Technical Specification
Approved (Document resp)
Mechanical
2
8.3 nFailures/h
MTBF (mean value) for the BMR465 series = 14.95 Mh.
MTBF at 90% confidence level = 12.89 Mh
Flex Power Modules fulfills and will continuously fulfill all its
obligations under regulation (EC) No 1907/2006
concerning the registration, evaluation, authorization and
restriction of chemicals (REACH) as they enter into force
and is through product materials declarations preparing for
the obligations to communicate information on substances
in the products.
Quality Statement
The products are designed and manufactured in an
industrial environment where quality systems and methods
like ISO 9000, Six Sigma, and SPC are intensively in use
to boost the continuous improvements strategy. Infant
mortality or early failures in the products are screened out
and they are subjected to an ATE-based final test.
Conservative design rules, design reviews and product
qualifications, plus the high competence of an engaged
work force, contribute to the high quality of the products.
Warranty
Warranty period and conditions are defined in Flex Power
Modules General Terms and Conditions of Sale.
Limitation of Liability
Flex Power Modules does not make any other warranties,
expressed or implied including any warranty of
merchantability or fitness for a particular purpose
(including, but not limited to, use in life support
applications, where malfunctions of product can cause
injury to a person’s health or life).
© Flex 2021
The information and specifications in this technical
specification is believed to be correct at the time of
publication. However, no liability is accepted for
inaccuracies, printing errors or for any consequences
thereof. Flex reserves the right to change the
contents of this technical specification at any time without
prior notice.
PUBLIC
PRODUCT SPECIFICATION
Prepared (Subject resp)
No.
jidgezou George Zou
Approved (Document resp)
BMR465George
seriesZou
PoL Regulators
jidgezou
3 (4)
1/1301-BMR465Technical Specification
Checked
Input 7.5 - 14 V, Output up to 90 A / 162 W
Safety Specification
General information
Flex Power Modules DC/DC converters and DC/DC
regulators are designed in accordance with the safety
standards IEC 60950-1, EN 60950-1 and UL 60950-1
Safety of Information Technology Equipment.
IEC/EN/UL 60950-1 contains requirements to prevent injury
or damage due to the following hazards:
•
•
•
•
•
•
3
Electrical shock
Energy hazards
Fire
Mechanical and heat hazards
Radiation hazards
Chemical hazards
On-board DC/DC converters and DC/DC regulators are
defined as component power supplies. As components
they cannot fully comply with the provisions of any safety
requirements without “conditions of acceptability”.
Clearance between conductors and between conductive
parts of the component power supply and conductors on
the board in the final product must meet the applicable
safety requirements. Certain conditions of acceptability
apply for component power supplies with limited stand-off
(see Mechanical Information and Safety Certificate for
further information). It is the responsibility of the installer to
ensure that the final product housing these components
complies with the requirements of all applicable safety
standards and regulations for the final product.
Component power supplies for general use should comply
with the requirements in IEC/EN/UL 60950-1 Safety of
Information Technology Equipment. Product related
standards, e.g. IEEE 802.3af Power over Ethernet, and
ETS-300132-2 Power interface at the input to telecom
equipment, operated by direct current (dc) are based on
IEC/EN/UL 60950-1 with regards to safety.
Flex Power Modules DC/DC converters, Power interface
modules and DC/DC regulators are UL 60950-1 recognized
and certified in accordance with EN 60950-1. The
flammability rating for all construction parts of the products
meet requirements for V-0 class material according to
IEC 60695-11-10, Fire hazard testing, test flames – 50 W
horizontal and vertical flame test methods.
Non - isolated DC/DC regulators
The DC/DC regulator output is SELV if the input source
meets the requirements for SELV circuits according to
IEC/EN/UL 60950-1.
Date
6/9/2021
Rev
1/28701-BMR465 Rev G
F
© Flex
June 2021
INTERNAL USE ONLY
PRODUCT SPECIFICATION
Prepared (Subject resp)
BMR465
series PoL Regulators
Lisa
Li
2/1301-BMR 465
2010 UenSpecification
Technical
Checked
Date
Dan Yue
8/7/2020
Input 7.5 - 14 V, Output up to 90 A / 162 W
Internal Circuit Diagram
1 (16)
No.
JIDDASUN Dan Sun
Approved (Document resp)
4
Rev
1/28701-BMR465 Rev G
D
© Flex
June 2021
INTERNAL USE ONLY
PRODUCT SPECIFICATION
Prepared (Subject resp)
BMR465
series PoL Regulators
Lisa
Li
2 (16)
No.
2/1301-BMR 465
2010 UenSpecification
Technical
JIDDASUN Dan Sun
Approved (Document resp)
5
Checked
Date
Dan Yue
8/7/2020
Input 7.5 - 14 V, Output up to 90 A / 162 W
Pin Descriptions – SIP version
Pin layout, top view.
Pin Descriptions – Lay Down versions
Pin layout, top view (component placement for illustration only).
Rev
1/28701-BMR465 Rev G
D
© Flex
June 2021
INTERNAL USE ONLY
PRODUCT SPECIFICATION
Prepared (Subject resp)
3 (16)
No.
2/1301-BMR 465
2010 UenSpecification
Technical
JIDDASUN Dan Sun
Approved (Document resp)
BMR465
series PoL Regulators
Lisa
Li
Checked
Date
Dan Yue
8/7/2020
Input 7.5 - 14 V, Output up to 90 A / 162 W
Pin
6
Rev
1/28701-BMR465 Rev G
D
June 2021
© Flex
Designation
Type
Function
1A, 1B, 1C, 1D
VIN
Power
Input Voltage
2A, 2B, 2C, 2D
GND
Power
Power Ground
3A, 3B, 3C, 3D
VOUT
Power
Output Voltage
4A
+S
I
Positive sense. Connect to output voltage close to the load.
4B
-S
I
Negative sense. Connect to power ground close to the load.
5A
VSET
I
Output voltage pin strap. Used with external resistor to set the nominal output
voltage. See section Output Voltage Adjust using Pin-strap Resistor.
5B
VTRK
I
Voltage Tracking input. Allows for tracking of output voltage to an external voltage.
See section Voltage Tracking.
6A
SALERT
6B
SDA
I/O
PMBus Data. Data signal for PMBus communication. Requires a pull-up resistor
even when unused. See section PMBus Interface.
7A
SCL
I/O
PMBus Clock. Clock for PMBus communication. Requires a pull-up resistor even
when unused. See section PMBus Interface.
7B
FAULT
I/O
8A
SA
I
8B
SYNC
I/O
9A
PG
9B
CTRL
I
10A
GCB
I/O
10B
PREF
11, 12
NC
O
PMBus Alert. Asserted low when any of the configured protection mechanisms
Open-Drain indicate a fault or a warning. See section Monitoring Faults.
Fault Indicator. For standalone operation this pin is not used and shall be left
unconnected. For parallel operation this pin shall be connected between products
using 0 Ω resistors. See section Parallel Operation.
PMBus address pin strap. Used with external resistor to assign a unique PMBus
address to the product. May be left open if PMBus is not used. See section
PMBus Addressing.
External switching frequency synchronization input or output. May be left open if
unused. See section Synchronization.
O
Power Good output. Asserted high when the product is ready to provide regulated
Open-Drain output voltage to the load. See section Power Good.
Power
Remote Control. Can be used to enable/disable the output voltage of the product.
May be left open if unused due to internal pull-up. See section Remote Control.
Group Communication Bus. Used for current sharing, and inter-device
communication. See section Group Communication Bus.
Pin-strap reference. Ground reference for pin-strap resistors.
No Connect Support pins. These pins are available only in lay down versions.
INTERNAL USE ONLY
PRODUCT SPECIFICATION
Prepared (Subject resp)
BMR465
series PoL Regulators
Lisa
Li
2/1301-BMR 465
2010 UenSpecification
Technical
Checked
Date
Dan Yue
8/7/2020
Input 7.5 - 14 V, Output up to 90 A / 162 W
Typical Application Circuit
Standalone operation with PMBus communication.
4 (16)
No.
JIDDASUN Dan Sun
Approved (Document resp)
7
Rev
1/28701-BMR465 Rev G
D
© Flex
June 2021
INTERNAL USE ONLY
PRODUCT SPECIFICATION
Prepared (Subject resp)
BMR465
series PoL Regulators
Lisa
Li
2/1301-BMR 465
2010 UenSpecification
Technical
Checked
Date
Dan Yue
8/7/2020
Input 7.5 - 14 V, Output up to 90 A / 162 W
Typical Application Circuit – Parallel Operation
Parallel operation.
5 (16)
No.
JIDDASUN Dan Sun
Approved (Document resp)
8
Rev
1/28701-BMR465 Rev G
D
© Flex
June 2021
9
INTERNAL USE ONLY
PRODUCT SPECIFICATION
Prepared (Subject resp)
6 (16)
No.
2/1301-BMR 465
2010 UenSpecification
Technical
JIDDASUN Dan Sun
Approved (Document resp)
BMR465
series PoL Regulators
Lisa
Li
Checked
Date
Dan Yue
8/7/2020
Input 7.5 - 14 V, Output up to 90 A / 162 W
Rev
1/28701-BMR465 Rev G
June 2021
D
© Flex
Absolute Maximum Ratings
Characteristics
min
max
Unit
TP1
Operating temperature (see Thermal Consideration section)
-40
typ
150
°C
TS
Storage temperature (Ambient)
-40
125
°C
VI
Input voltage (See Operating Information Section for input and output voltage relations)
-0.3
16
V
Signal I/O voltage
Ground voltage
differential
CTRL, SA, SALERT, SCL, SDA, VSET, SYNC, PG, GCB, FAULT
-0.3
6
V
-S, PREF, GND
-0.3
0.3
V
Analog pin voltage
VO, +S, VTRK
-0.3
6.5
V
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicated in the Electrical Specification section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Configuration File
This product is designed with a digital control circuit. The control circuit uses a configuration file which determines the functionality and
performance of the product. The Electrical Specification table shows parameter values of functionality and performance with the Standard
configuration, unless otherwise specified. The Standard configuration is designed to fit most application needs. Changes in Standard
configuration might be required to optimize performance in specific application. Note that current sharing operation requires changed
configuration. See application note AN307 for further information.
Common Electrical Specification
This section includes parameter specifications common to all product versions within the product series. Typically these are parameters defined
by the digital controller of the products. In the table below PMBus commands for configurable parameters are written in capital letters.
TP1 = -30 to +95 °C, VI = 7.5 to 14 V, unless otherwise specified under Conditions.
Typical values given at: TP1 = +25 °C, VI = 12.0 V, max IO, unless otherwise specified under Conditions.
VO defined by pin-strap. Standard configuration.
Characteristics
Conditions
min
Switching Frequency
fSW =
1/TSW
Switching Frequency Range, Note 1
Switching Frequency Set-point Accuracy
External Sync Pulse Width
Input Clock Frequency Drift Tolerance
TINIT
Initialization Time
TONdel_tot
Output voltage
Total On Delay Time
TONdel
Output voltage
On Delay Time
TOFFdel
TONrise /
TOFFfall
Output voltage
Off Delay Time
Output voltage
On/Off
Ramp Time
(0-100%-0 of VO)
typ
max
320
PMBus configurable
FREQUENCY_SWITCH
External sync
From VI > ~2.7 V to ready to be enabled
Enable by input voltage
Enable by CTRL pin
Turn on delay duration
Range PMBus configurable
TON_DELAY
Accuracy (actual delay vs set value)
Turn off delay duration, Note 2
Range PMBus configurable
TOFF_DELAY
Accuracy (actual delay vs set value), Note 3
Turn on ramp duration
Turn off ramp duration
Ramp duration range
PMBus configurable
TON_RISE/TOFF_FALL
Ramp time accuracy for standalone
operation (actual ramp time vs set value)
Unit
kHz
200
640
kHz
-5
150
-10
5
%
ns
%
10
67
TINIT + TONdel
TONdel
5
3
ms
ms
250
-0/+2
0
4
ms
ms
250
-0/+2
5
Disabled in standard configuration. Turn off
immediately upon expiration of Turn off delay.
0
100
±250
ms
ms
ms
ms
ms
µs
10
INTERNAL USE ONLY
PRODUCT SPECIFICATION
Prepared (Subject resp)
2/1301-BMR 465
2010 UenSpecification
Technical
JIDDASUN Dan Sun
Approved (Document resp)
BMR465
series PoL Regulators
Lisa
Li
Checked
Date
Dan Yue
8/7/2020
Input 7.5 - 14 V, Output up to 90 A / 162 W
Characteristics
Conditions
PG threshold
Rising
Falling
PG thresholds range
PMBus configurable
POWER_GOOD_ON
VOUT_UV_FAULT_LIMIT
Power Good , PG
PG delay
PG delay range
From VO reaching target to
PG assertion
PMBus configurable
POWER_GOOD_DELAY
IUVP threshold
IUVP threshold range
Input Under Voltage
Protection,
IUVP
IUVP hysteresis range
IOVP threshold range
PMBus configurable
VIN_UV_WARN_LIMIT
VIN_UV_FAULT_RESPONSE
PMBus configurable
VIN_OV_FAULT_LIMIT
IOVP hysteresis range
UVP threshold range
PMBus configurable
VIN_OV_WARN_LIMIT
VIN_OV_FAULT_RESPONSE
PMBus configurable
VOUT_UV_FAULT_LIMIT
OVP threshold
OVP threshold range
PMBus configurable
VOUT_OV_FAULT_LIMIT
UVP/OVP response time
Fault response
Over Current
Protection,
OCP
Note 5
Over Temperature
Protection,
OTP
Position P3
Note 7
Over Temperature
Protection,
OTP
Position P1 / P2
Note 7
Rev
1/28701-BMR465 Rev G
OCP threshold
OCP threshold range
Protection delay
Fault response
OTP threshold
OTP threshold range
OTP hysteresis
Fault response
OTP Threshold
OTP Threshold range
OTP Hysteresis
Fault response
VOUT_UV_FAULT_RESPONSE
VOUT_OV_FAULT_RESPONSE
Set value per phase
PMBus configurable
IOUT_AVG_OC_FAULT_LIMIT
See Note 6
MFR_IOUT_OC_FAULT_RESPONSE
PMBus configurable
OT_FAULT_LIMIT
PMBus configurable
OT_FAULT_RESPONSE
PMBus configurable
MFR_VMON_OV_FAULT_LIMIT
VMON_OV_FAULT_RESPONSE
June 2021
D
© Flex
min
typ
max
90
85
0
2
0
Unit
% VO
% VO
100
% VO
ms
5000
ms
6.4
V
6.4-14
V
0.5
V
0-7.6
V
±280
100
Shutdown, automatic restart, 280 ms. Note 4
16
mV
μs
V
6.9-16
V
1
V
0-9.1
V
IOVP hysteresis
Set point accuracy
IOVP response delay
Fault response
UVP threshold
Output Voltage
Over/Under Voltage
Protection,
OVP/UVP
PMBus configurable
VIN_UV_FAULT_LIMIT
IUVP hysteresis
Set point accuracy
IUVP response delay
Fault response
IOVP threshold
Input Over Voltage
Protection,
IOVP
7 (16)
No.
±280
100
Shutdown, automatic restart, 280 ms. Note 4
85
mV
μs
% VO
0-100
% VO
115
% VO
100-115
% VO
10
μs
Shutdown, automatic restart, 280 ms. Note 4
57
A
0-57
A
5
Shutdown, automatic restart, 280 ms. Note 4
125
-40…+125
15
Shutdown, automatic restart, 280 ms. Note 4
150
-40…+150
25
Shutdown, automatic restart, 280 ms. Note 4
TSW
C
C
C
C
C
C
11
INTERNAL USE ONLY
PRODUCT SPECIFICATION
Prepared (Subject resp)
2/1301-BMR 465
2010 UenSpecification
Technical
JIDDASUN Dan Sun
Approved (Document resp)
BMR465
series PoL Regulators
Lisa
Li
Checked
Date
Dan Yue
8/7/2020
Input 7.5 - 14 V, Output up to 90 A / 162 W
Characteristics
Conditions
Rev
1/28701-BMR465 Rev G
Output current
READ_IOUT
© Flex
min
TP1 = 25 C, VO = 1.0 V
TP1 = 0 - 95 C, VO = 1.0 V
Duty cycle
READ_DUTY_CYCLE
Temperature
READ_TEMPERATURE_1
typ
±1
% VO
±1
±3.5
A
A
No tolerance, Read value is the actual value
applied by PWM controller.
Position P3, TP3 = 0 - 95 C
-10
70
Tracking Input Voltage Range
VTRK pin
0-5
Tracking Rise-Time
VTRK pin
Tracking Accuracy
Regulation 100% tracking
Logic output low signal level
VOH
Logic output high signal level
IOL
IOH
VIL
VIH
Logic output low sink current
Logic output high source current
Logic input low threshold
Logic input high threshold
II_LEAK
Logic leakage current
CI_PIN
Logic pin input capacitance
RI_PU
Logic pin internal pull-up resistance
fSMB
Supported SMBus Operating
frequency
TBUF
SMBus Bus free time
tset
thold
SMBus SDA setup time from SCL
SMBus SDA hold time from SCL
SMBus START/STOP condition
setup/hold time from SCL
SCL low period
SCL high period
Tlow
Thigh
Unit
mV
VTRK = 5 V
VOL
max
±280
Tracking Input Bias Current
Current difference between products in a current
sharing group
Supported number of products in a current
sharing group
June 2021
D
Input voltage
READ_VIN
Output voltage
READ_VOUT
Monitoring Accuracy
8 (16)
No.
Steady state operation
-2
5
°C
200
µA
V
1
V/ms
2
% VO
Max 2 x READ_IOUT monitoring accuracy
4
SCL, SDA, SYNC, GCB,
SALERT, PG
Sink / source current = 2 mA
SCL, SDA, CTRL, SYNC,
GCB
SCL, SDA, SYNC, SALERT,
PG
SCL, SDA, CTRL, SYNC,
GCB
SCL, SDA, SALERT
CTRL to +5V
GCB to +5V
0.5
2.25
STOP bit to START bit
See section SMBus – Timing
See section SMBus – Timing
See section SMBus – Timing
V
2
2
0.8
mA
mA
V
V
100
µA
2
-100
100
V
12
pF
No internal pull-up
10
47
kΩ
kΩ
400
kHz
1.3
µs
100
300
ns
ns
600
ns
1.3
0.6
µs
µs
Note 1. There are configuration changes to consider when changing the switching frequency, see section Switching Frequency.
Note 2. A default value of 0 ms forces the device to Immediate Off behavior with TOFF_FALL ramp-down setting being ignored.
Note 3. The specified accuracy applies for off delay times larger than 4 ms. When setting 0 ms the actual delay will be 0 ms.
Note 4. Automatic restart ~280 ms after fault if the fault is no longer present. Continuous restart attempts if the fault reappear after restart. See Operating Information
for other fault response options.
Note 5. The set OCP limit applies per phase. The total OCP limit will be twice the set value. Note that higher OCP threshold than specified may result in damage of
the module at OC fault conditions.
Note 6. TSW is the switching period.
Note 7. See section Over Temperature Protection (OTP).
12
INTERNAL USE ONLY
PRODUCT SPECIFICATION
Prepared (Subject resp)
9 (16)
No.
2/1301-BMR 465
2010 UenSpecification
Technical
JIDDASUN Dan Sun
Approved (Document resp)
BMR465
series PoL Regulators
Lisa
Li
Checked
Date
Dan Yue
8/7/2020
Input 7.5 - 14 V, Output up to 90 A / 162 W
Product Electrical Specification
Rev
1/28701-BMR465 Rev G
June 2021
D
© Flex
BMR 465 0010, BMR 465 1010, BMR 465 2010
TP1 = -30 to +95 °C, VI = 7.5 to 14 V, unless otherwise specified under Conditions.
Typical values given at: TP1 = +25 °C, VI = 12.0 V, max IO, unless otherwise specified under Conditions.
VO defined by pin strap. Standard configuration.
Tested with external CIN = 1000 μF/12 mΩ + 24 x 10 μF, COUT = 10 x 470 μF/5 mΩ + 10 x 100 μF. See Operating Information section for design
of input and output filters for a specific application.
In the test set-up sense lines are connected directly to output pins on a converter and all the output voltage measurements are made on output
pins.
Characteristics
VI
VO
Conditions
Input voltage
Input voltage slew rate
Output voltage without pin-strap
Output voltage adjustment range
Output voltage adjustment including
PMBus margining
Output voltage set-point resolution
Output voltage accuracy, Note 8
Internal resistance +S/-S to VOUT/GND
+S bias current
-S bias current
Line regulation
IO = max IO
Load regulation
IO = 0 - 100%
VOac
Output ripple & noise
(up to 20 MHz)
IO
Ilim
Output current
Current limit threshold
Isc
Short circuit current
50% of max IO
η
Efficiency
IO = max IO
Pd
Power dissipation at max IO
Pli
Input idling
power
PCTRL
CI
CO
Input standby power
Internal input capacitance
Internal output capacitance
IO = 0
min
typ
max
Unit
14
6
V
V/ms
0.6
1.8
V
V
0.54
1.98
V
7.5
Monotonic
1.2
±0.025
Including line, load, temp
-1
-100
VO = 0.6 V
VO = 1.0 V
VO = 1.8 V
VO = 0.6 V
VO = 1.0 V
VO = 1.8 V
VO = 0.6 V
VO = 1.0 V
VO = 1.8 V
0
100
1
47
20
20
2
2
2
2
2
2
2.5
3.5
5.0
114
RMS, hiccup mode,
VO = 1.0 V, 0.4 mΩ short
12
VO = 0.6 V
VO = 1.0 V
VO = 1.8 V
VO = 0.6 V
VO = 1.0 V
VO = 1.8 V
VO = 0.6 V
VO = 1.0 V
VO = 1.8 V
VO = 0.6 V
VO = 1.0 V
VO = 1.8 V
Turned off with CTRL-pin
VI = 0 V
VO = 0 V
87.6
91.4
94.3
83.7
88.7
92.5
10.5
11.5
13.1
1.29
1.35
1.82
0.44
257
700
Note 8. For VO < 1.0 V accuracy is +/-10 mV. For further exceptions see section Output Voltage Adjust using PMBus.
100
% VO
% VO
Ω
µA
µA
mV
mV
mVp-p
90
125
A
A
A
%
%
W
W
W
μF
μF
13
INTERNAL USE ONLY
PRODUCT SPECIFICATION
Prepared (Subject resp)
10 (16)
No.
2/1301-BMR 465
2010 UenSpecification
Technical
JIDDASUN Dan Sun
Approved (Document resp)
BMR465
series PoL Regulators
Lisa
Li
Checked
Date
Dan Yue
8/7/2020
Input 7.5 - 14 V, Output up to 90 A / 162 W
Rev
Typical Output Characteristics, VO = 0.6 V
1/28701-BMR465 Rev G
June 2021
D
© Flex
BMR 465 0010, BMR 465 1010, BMR 465 2010
Standard configuration unless otherwise specified, TP1 = +25 °C
Efficiency
Power Dissipation
[%]
[W]
100
15
95
12
VI
VI
90
7.5 V
85
9.6 V
80
12 V
75
14 V
7.5 V
9
9.6 V
6
12 V
14 V
3
0
70
0
10
20
30
40
50
60
70
80
0
90 [A]
10
20
30
40
50
60
70
80
90 [A]
Efficiency vs. load current and input voltage.
Dissipated power vs. load current and input voltage.
Output Current Derating for SIP version
Output Current Derating for Lay Down versions
[A]
[A]
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
3.0 m/s
2.0 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
20
40
60
80
100
120 [°C]
3.0 m/s
2.0 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
20
40
60
80
100
120 [°C]
Available load current vs. ambient air temperature and airflow at
VI = 12 V. See section Thermal Consideration.
Available load current vs. ambient air temperature and airflow at
VI = 12 V. See section Thermal Consideration.
Output Ripple and Noise
Transient Response
Fundamental output voltage ripple at V I = 12 V, IO = max IO,
COUT = 10 x 470 μF/5 mΩ + 10 x 100 μF.
Scale: 5 mV/div, 2 µs/div, 20 MHz bandwidth.
See section Output Ripple and Noise.
Output voltage response to load current step change (22.5–67.5–22.5 A) at
VI = 12 V, COUT = 10 x 470 μF/5 mΩ + 10 x 100 μF, di/dt = 2 A/µs,
ASCR Gain = 550 and ASCR Residual = 90.
Scale from top: 50 mV/div, 20 A/div, 100 µs/div.
14
INTERNAL USE ONLY
PRODUCT SPECIFICATION
Prepared (Subject resp)
11 (16)
No.
2/1301-BMR 465
2010 UenSpecification
Technical
JIDDASUN Dan Sun
Approved (Document resp)
BMR465
series PoL Regulators
Lisa
Li
Checked
Date
Dan Yue
8/7/2020
Input 7.5 - 14 V, Output up to 90 A / 162 W
Rev
Typical Output Characteristics, VO = 1.0 V
1/28701-BMR465 Rev G
June 2021
D
© Flex
BMR 465 0010, BMR 465 1010, BMR 465 2010
Standard configuration unless otherwise specified, TP1 = +25 °C
Efficiency
Power Dissipation
[%]
[W]
100
15
95
12
VI
VI
90
7.5 V
85
9.6 V
80
12 V
75
14 V
7.5 V
9
9.6 V
6
12 V
14 V
3
0
70
0
10
20
30
40
50
60
70
80
0
90 [A]
10
20
30
40
50
60
70
80
90 [A]
Efficiency vs. load current and input voltage.
Dissipated power vs. load current and input voltage.
Output Current Derating for SIP version
Output Current Derating for Lay Down versions
[A]
[A]
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
3.0 m/s
2.0 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
20
40
60
80
100
120 [°C]
3.0 m/s
2.0 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
20
40
60
80
100
120 [°C]
Available load current vs. ambient air temperature and airflow at
VI = 12 V. See section Thermal Consideration.
Available load current vs. ambient air temperature and airflow at
VI = 12 V. See section Thermal Consideration.
Output Ripple and Noise
Transient Response
Fundamental output voltage ripple at V I = 12 V, IO = max IO,
COUT = 10 x 470 μF/5 mΩ + 10 x 100 μF.
Scale: 5 mV/div, 2 µs/div, 20 MHz bandwidth.
See section Output Ripple and Noise.
Output voltage response to load current step change (22.5–67.5–22.5 A) at
VI = 12 V, COUT = 10 x 470 μF/5 mΩ + 10 x 100 μF, di/dt = 2 A/µs,
ASCR Gain = 400 and ASCR Residual = 90.
Scale from top: 50 mV/div, 20 A/div, 100 µs/div.
15
INTERNAL USE ONLY
PRODUCT SPECIFICATION
Prepared (Subject resp)
12 (16)
No.
2/1301-BMR 465
2010 UenSpecification
Technical
JIDDASUN Dan Sun
Approved (Document resp)
BMR465
series PoL Regulators
Lisa
Li
Checked
Date
Dan Yue
8/7/2020
Input 7.5 - 14 V, Output up to 90 A / 162 W
Rev
Typical Output Characteristics, VO = 1.8 V
1/28701-BMR465 Rev G
June 2021
D
© Flex
BMR 465 0010, BMR 465 1010, BMR 465 2010
Standard configuration unless otherwise specified, TP1 = +25 °C
Efficiency
Power Dissipation
[%]
[W]
100
15
95
12
VI
VI
90
7.5 V
85
9.6 V
80
12 V
75
14 V
7.5 V
9
9.6 V
6
12 V
14 V
3
0
70
0
10
20
30
40
50
60
70
80
0
90 [A]
10
20
30
40
50
60
70
80
90 [A]
Efficiency vs. load current and input voltage.
Dissipated power vs. load current and input voltage.
Output Current Derating for SIP version
Output Current Derating for Lay Down versions
[A]
[A]
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
3.0 m/s
2.0 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
20
40
60
80
100
120 [°C]
3.0 m/s
2.0 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
20
40
60
80
100
120 [°C]
Available load current vs. ambient air temperature and airflow at
VI = 12 V. See section Thermal Consideration.
Available load current vs. ambient air temperature and airflow at
VI = 12 V. See section Thermal Consideration.
Output Ripple and Noise
Transient Response
Fundamental output voltage ripple at VI = 12 V, IO = max IO,
COUT = 10 x 470 μF/5 mΩ + 10 x 100 μF.
Scale: 5 mV/div, 2 µs/div, 20 MHz bandwidth.
See section Output Ripple and Noise.
Output voltage response to load current step change (22.5–67.5–22.5 A) at
VI = 12 V, COUT = 10 x 470 μF/5 mΩ + 10 x 100 μF, di/dt = 2 A/µs,
ASCR Gain = 350 and ASCR Residual = 90.
Scale from top: 50 mV/div, 20 A/div, 100 µs/div.
INTERNAL USE ONLY
PRODUCT SPECIFICATION
Prepared (Subject resp)
BMR465
series PoL Regulators
Lisa
Li
13 (16)
No.
2/1301-BMR 465
2010 UenSpecification
Technical
JIDDASUN Dan Sun
Approved (Document resp)
16
Checked
Date
Dan Yue
8/7/2020
Input 7.5 - 14 V, Output up to 90 A / 162 W
Typical On/Off Characteristics
Rev
1/28701-BMR465 Rev G
D
June 2021
© Flex
BMR 465 0010, BMR 465 1010, BMR 465 2010
Standard configuration, TP1 = +25 °C, VO = 1.0 V
Enable by input voltage – PG Open-Drain (default)
Disable by input voltage – PG Open-Drain (default)
VI
VI
VO
VO
PG
PG
Output enabled by applying VI. VI = 12 V, IO = max IO.
TON_DELAY = TON_RISE = 5 ms, POWER_GOOD_DELAY = 2 ms.
USER_CONFIG = 0x1480 (default). PG pulled up to external voltage.
Note: PG being high before Vin applied can be avoided by pulling up PG to Vout.
Scale from top: 10, 0.5, 2 V/div, 20 ms/div.
Output disabled by removing VI. VI = 12 V, IO = max IO.
Scale from top: 10, 0.5, 2 V/div, 1 ms/div.
Enable by input voltage – PG Push-Pull
Disable by input voltage – PG Push-Pull
VI
VO
PG
Output enabled by applying VI. VI = 12 V, IO = max IO.
TON_DELAY = TON_RISE = 5 ms, POWER_GOOD_DELAY = 2 ms.
USER_CONFIG = 0x1484 (PG push-pull).
Scale from top: 10, 0.5, 2 V/div, 20 ms/div.
Output disabled by removing VI. VI = 12 V, IO = max IO.
Scale from top: 10, 0.5, 2 V/div, 1 ms/div.
Enable by CTRL pin
Disable by CTRL pin
CTRL
CTRL
VO
VO
PG
PG
Output enabled by CTRL pin. VI = 12 V, IO = max IO.
TON_DELAY = TON_RISE = 5 ms, POWER_GOOD_DELAY = 2 ms.
Scale from top: 5, 0.5, 2 V/div, 10 ms/div.
Output disabled by CTRL pin. VI = 12 V, IO = max IO.
Scale from top: 5, 0.5, 2 V/div, 1 ms/div.
17
INTERNAL USE ONLY
PRODUCT SPECIFICATION
Prepared (Subject resp)
14 (16)
No.
2/1301-BMR 465
2010 UenSpecification
Technical
JIDDASUN Dan Sun
Approved (Document resp)
BMR465
series PoL Regulators
Lisa
Li
Checked
Date
Dan Yue
8/7/2020
Input 7.5 - 14 V, Output up to 90 A / 162 W
Rev
Typical Charactersitics
1/28701-BMR465 Rev G
June 2021
D
© Flex
BMR 465 0010, BMR 465 1010, BMR 465 2010
Standard configuration unless otherwise specified, TP1=+25 °C
Efficiency vs. Output Current and
Switching Frequency
Power Dissipation vs. Output Current and
Switching Frequency
[%]
[W]
95
15
200 kHz
12
200 kHz
VI
VI
85
320 kHz
9
320 kHz
80
480 kHz
6
480 kHz
75
640 kHz
3
640 kHz
90
70
0
0
10
20
30
40
50
60
70
80
90 [A]
0
10
20
30
40
50
60
70
80
90 [A]
Efficiency vs. load current and switching frequency at
VI = 12 V, VO = 1.0 V, CO = 10 x 470 μF/5 mΩ + 10 x 100 μF.
Frequency changed by PMBus command FREQUENCY_SWITCH.
Dissipated power vs. load current and switching frequency at
VI = 12 V, VO = 1.0 V, CO = 10 x 470 μF/5 mΩ + 10 x 100 μF.
Frequency changed by PMBus command FREQUENCY_SWITCH.
Output Ripple vs. Switching Frequency
Load Transient vs. ASCR Gain and
External Output Capacitance
[mVpk-pk]
[mV]
8
100
80
6
10x100
μF +
10x470
μF/5 mΩ
VO
0.6 V
60
4
2
0
1.0 V
40
1.8 V
20
10x100
μF +
4x470
μF/5 mΩ
0
200
300
400
500
600 [kHz]
Output voltage ripple Vpk-pk vs. switching frequency at
VI = 12 V, IO = max IO, CO = 10 x 470 μF/5 mΩ + 10 x 100 μF.
Frequency changed by PMBus command FREQUENCY_SWITCH.
150
200
250
300
350
400
450
500
Load transient peak voltage deviation vs. ASCR gain and external capacitance.
Step (22.5–67.5–22.5 A).
VI = 12 V, VO = 1.0 V, fsw = 320 kHz, ASCR residual =90, di/dt = 2 A/µs.
ASCR gain changed by PMBus command ASCR_CONFIG.
18
PUBLIC
PRODUCT SPECIFICATION
Prepared (Subject resp)
1 (14)
No.
3/1301-BMR465Technical Specification
Approved (Document resp)
BMR465George
seriesZou
PoL Regulators
jidgezou
Checked
Input 7.5 - 14 V, Output up to 90 A / 162 W
EMC Specification
Conducted EMI is measured according to the test set-up
below. The typical fundamental switching frequency is 320
kHz.
Conducted EMI Input terminal value (typical for standard
configuration). VI = 12 V, VO = 1.0 V, IO = 90 A.
Date
Rev
8/18/2020
1/28701-BMR465 Rev G
D
June 2021
© Flex
Output Ripple and Noise
Output ripple and noise are measured according to figure
below. A 50 mm conductor works as a small inductor forming
together with the two capacitances a damped filter.
50 mm conductor
Vout
+S
Tantalum
Capacitor
10 µF
co
Ceramic
Capacitor
0.1 µF
−S
GND
Load
jidgezou George Zou
50 mm conductor
BNC-contact to
oscilloscope
Output ripple and noise test set-up.
The digital compensation of the product is designed to
automatically provide stability, accurate line and load regulation
and good transient performance for a wide range of operating
conditions (switching frequency, input voltage, output voltage,
output capacitance). Inherent from the implementation and
normal to the product there will be some low frequency ripple
at the output, in addition to the fundamental switching
frequency output ripple. The total output ripple and noise is
maintained at a low level.
EMI without filter.
To spectrum
analyzer
RF Current probe
1 kHz – 50 MHz
Battery
supply
Resistive
load
DUT
C1
50 mm
C1 = 10 µF / 600 VDC
Feed- Thru RF capacitor
800 mm
200 mm
Test set-up conducted emission, power lead.
DUT = Product mounted on a 182 cm2 test board with the external
capacitances CIN = 1000 μF/12 mΩ + 24 x 10 μF and COUT = 10 x 470
μF/5 mΩ + 10 x 100 μF.
VI = 12 V, VO = 1.0 V, IO = 90 A, COUT = 10 x 470 μF/5 mΩ + 10 x 100 μF,
5 mV/div, 50 µs/div
Example of low frequency ripple at the output.
19
PUBLIC
PRODUCT SPECIFICATION
Prepared (Subject resp)
3/1301-BMR465Technical Specification
jidgezou George Zou
Approved (Document resp)
BMR465George
seriesZou
PoL Regulators
jidgezou
2 (14)
No.
Checked
Input 7.5 - 14 V, Output up to 90 A / 162 W
Date
Rev
8/18/2020
1/28701-BMR465 Rev G
D
June 2021
© Flex
PMBus Interface
Power Management Overview
This product incorporates a wide range of configurable power
management features that are simple to implement with a
minimum of external components. Additionally, the product
includes protection features that continuously safeguard the
load from damage due to unexpected system faults.
The product’s standard configuration is suitable for a wide
range of operation in terms of input voltage, output voltage, and
load. The configuration is stored in an internal Non-Volatile
Memory (NVM). All power management functions can be
reconfigured using the PMBus interface.
Throughout this document, different PMBus commands are
referenced. A detailed description of each command is
provided in the appendix at the end of this specification.
The Flex Power Designer software suite can be used to
configure and monitor this product via the PMBus interface.
For more information please contact your local Flex sales
representative.
RSA [k]
Address
RSA [k]
Address
0 (short)
0x26
42.2
0x28
10
0x19
46.4
0x29
11
0x1A
51.1
0x2A
12.1
0x1B
56.2
0x2B
13.3
0x1C
61.9
0x2C
14.7
0x1D
68.1
0x2D
16.2
0x1E
75
0x2E
17.8
0x1F
82.5
0x2F
19.6
0x20
90.9
0x30
21.5
0x21
100
0x31
23.7
0x22
110
0x32
26.1
0x23
121
0x33
28.7
0x24
133
0x34
31.6
0x25
147
0x35
34.8
0x26
162
0x36
38.3
0x27
178
0x37
Infinite
(open)
SMBus Interface
0x28
The product can be used with any standard two-wire I2C or
SMBus host device. See Electrical Specification for allowed
clock frequency range. In addition, the product is compatible
Reserved Addresses
with PMBus version 1.2 and includes an SALERT line to help
Addresses listed in the table below are reserved or assigned
mitigate limitations related to continuous fault monitoring. The
according to the SMBus specification and may not be usable.
PMBus signals SCL, SDA and SALERT require passive pull-up
Refer to the SMBus specification for further information.
resistors as stated in the SMBus Specification. Pull-up resistors
values should be selected to guarantee the rise time according
to equation below:
Address
Comment
= RP C p 1s
0x00
General Call Address / START byte
0x01
CBUS address
where Rp is the pull-up resistor value and Cp is the bus
loading. The maximum allowed bus load is 400 pF. The pull-up
resistor should be tied to an external supply voltage in range
from 2.5 to 5.5 V, which should be present prior to or during
power-up. If the proper power supply is not available, voltage
dividers may be applied. Note that in this case, the resistance
in the equation above corresponds to parallel connection of the
resistors forming the voltage divider.
See application note AN304 for details on interfacing the
product with a microcontroller.
0x02
Address reserved for different bus format
0x03 - 0x07
Reserved for future use
0x08
SMBus Host
0x09 - 0x0B
Assigned for Smart Battery
0x0C
SMBus Alert Response Address
0x28
Reserved for ACCESS.bus host
0x2C - 0x2D
Reserved by previous versions of the SMBus
specification
0x37
PMBus Addressing
The PMBus address is configured with a resistor connected
between the SA pin and the PREF pin, as shown in the Typical
Application Circuit. Recommended resistor values are shown
in the table below. 1% tolerance resistors are required.
0x48 - 0x4B
Reserved for ACCESS.bus default address
Reserved by previous versions of the SMBus
specification
Unrestricted addresses
0x61
SMBus Device Default Address
0x78 - 0x7B
10-bit slave addressing
0x7C - 0x7F
Reserved for future use
0x40 - 0x44
PUBLIC
PRODUCT SPECIFICATION
Prepared (Subject resp)
20
3 (14)
No.
3/1301-BMR465Technical Specification
jidgezou George Zou
Approved (Document resp)
BMR465George
seriesZou
PoL Regulators
jidgezou
Checked
Input 7.5 - 14 V, Output up to 90 A / 162 W
Monitoring via PMBus
It is possible to continuously monitor a wide variety of
parameters through the PMBus interface. These include, but
are not limited to, the parameters listed in the table below.
Parameter
Input voltage
PMBus Command
READ_VIN
Output voltage
READ_VOUT
Total output current
Controller temperature (TP3)
READ_IOUT
READ_IOUT0
READ_IOUT1
READ_TEMPERATURE_1
Switching frequency
READ_FREQUENCY
Duty cycle
Highest temperature of power
switches (TP1, TP2)
READ_DUTY_CYCLE
Output current of each phase
MFR_READ_VMON *
* Reports a voltage level corresponding to the temperature. See
command details in the end of this specification for formula to use.
Monitoring Faults
Fault conditions can be monitored using the SALERT pin,
which will be asserted low when any number of pre-configured
fault or warning conditions occur. The SALERT pin will be held
low until faults and/or warnings are cleared by the
CLEAR_FAULTS command, or until the output voltage has
been re-enabled.
It is possible to mask which fault conditions should not assert
the SALERT pin by the command MFR_SMBALERT_MASK.
Date
Rev
8/18/2020
1/28701-BMR465 Rev G
D
June 2021
© Flex
Snapshot Parameter Capture
This product offers a special feature that enables the user to
capture parametric data during normal operation by a single
PMBus command. The following parameters are stored:
•
•
•
•
•
•
•
Input voltage
Output voltage
Output current
Controller temperature
Switching frequency
Duty cycle
Status and fault information
When a fault occurs the Snapshot functionality will
automatically store this parametric data to NVM. The data can
then later be read back using the SNAPSHOT command to
provide valuable information for analysis. It is possible to select
which faults will trigger a store to NVM by the PMBus command
SNAPSHOT_FAULT_MASK.
See application note AN320 for details on using the Snapshot
feature.
PMBus/I2C Timing
In response to the SALERT signal, the user may read a number
of status commands to find out what fault or warning condition
Setup and hold times timing diagram.
occurred, see table below.
Fault & Warning Status
Overview, Power Good
PMBus Command
STATUS_WORD
STATUS_BYTE
Output voltage level
STATUS_VOUT
Output current level
STATUS_IOUT
Input voltage level
STATUS_INPUT
Temperature level
STATUS_TEMPERATURE
PMBus communication
STATUS_CML
Miscellaneous
STATUS_MFR_SPECIFIC
The setup time, tset, is the time data, SDA, must be stable
before the rising edge of the clock signal, SCL. The hold time
thold, is the time data, SDA, must be stable after the falling edge
of the clock signal, SCL. If these times are violated incorrect
data may be captured or meta-stability may occur and the bus
communication may fail. All standard SMBus protocols must be
followed, including clock stretching. Refer to the SMBus
specification, for SMBus electrical and timing requirements.
This product supports the BUSY flag in the status commands to
indicate product being too busy for SMBus response. A busfree time delay according to this specification must occur
between every SMBus transmission (between every stop &
start condition).
The product supports PEC (Packet Error Checking) according
to the SMBus specification.
When sending subsequent commands to the same module, it is
recommended to insert additional delays according to the table
below.
PUBLIC
PRODUCT SPECIFICATION
Prepared (Subject resp)
3/1301-BMR465Technical Specification
Approved (Document resp)
BMR465George
seriesZou
PoL Regulators
jidgezou
Checked
Input 7.5 - 14 V, Output up to 90 A / 162 W
After sending PMBus
Command
Required delay before
additional command
STORE_USER_ALL
Date
Rev
8/18/2020
1/28701-BMR465 Rev G
D
RESTORE_USER_ALL
© Flex
Command Protection
The user may write-protect specific PMBus commands in the
User NVM by using the command UNPROTECT.
Initialization Procedure
The product follows an internal initialization procedure after
power is applied to the VIN pins:
100 ms
RESTORE_DEFAULT_ALL
1. Self test and memory check.
10 ms
2 ms after reading
10 ms after writing
2. The address pin-strap resistors are measured and the
associated PMBus address is defined.
Non-Volatile Memory (NVM)
The product incorporates two Non-Volatile Memory areas for
storage of the PMBus command values; the Default NVM and
the User NVM.
The Default NVM is pre-loaded with Flex factory default values.
The Default NVM is write-protected and can be used to restore
the Flex factory default values through the command
RESTORE_DEFAULT_ALL.
The User NVM is pre-loaded with Flex factory default values.
The User NVM is writable and open for customization. The
values in NVM are loaded during initialization according to
section Initialization Procedure, whereafter commands can be
changed through the PMBus Interface. The
STORE_USER_ALL command will store the changed
parameters to the User NVM.
Pin-strap resistors
INITIALIZATION
Default NVM
INITIALIZATION
Flex factory default
Write-protected
RESTORE_DEFAULT_ALL
3. The output voltage pin-strap resistor is measured and the
associated output voltage level will be loaded to operational
RAM of PMBus command VOUT_COMMAND.
4. Flex factory default values stored in default NVM memory
are loaded to operational RAM. This overwrites any
previously loaded values.
5. Values stored in the User NVM are loaded into operational
RAM memory. This overwrites any previously loaded values
(e.g. VOUT_COMMAND by pin-strap).
6. Check for external clock signal at the SYNC pin and lock
internal clock to the external clock if used.
Once this procedure is completed and the Initialization Time
has passed (see Electrical Specification), the output voltage is
ready to be enabled using the CTRL pin. The product is also
ready to accept commands via the PMBus interface, which in
case of writes will overwrite any values loaded during the
initialization procedure.
VIN
RAM
User NVM
Flex factory default
Customizable
TINIT
INITIALIZATION
STORE_USER_ALL
VOUT
RESTORE_USER_ALL
WRITE
PMBus interface
June 2021
100 ms
STORE_DEFAULT_ALL
Any other command
4 (14)
No.
jidgezou George Zou
VOUT_MAX
21
READ
Illustration of memory areas of the product.
Illustration Initialization time.
Ready for output
enable and soft-start
22
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3/1301-BMR465Technical Specification
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No.
Checked
Input 7.5 - 14 V, Output up to 90 A / 162 W
Date
8/18/2020
Rev
1/28701-BMR465 Rev G
D
June 2021
© Flex
Operating Information
Input Voltage
The input voltage range 7.5 - 14 V makes the product
easy to use in intermediate bus applications when powered
by a non-regulated bus converter or a regulated bus
converter.
Input Under Voltage Protection (IUVP)
The product monitors the input voltage and will turn-on and
turn-off at configured thresholds (see Electrical Specification).
The turn-on input voltage threshold is set higher than the
corresponding turn-off threshold. Hence, there is a hysteresis
between turn-on and turn-off input voltage levels. Once the
input voltage falls below the turn-off threshold, the device can
respond in several ways as follows:
1.
Immediate and definite shutdown of output voltage until
the fault is cleared by PMBus command CLEAR_FAULTS
or the output voltage is re-enabled.
2.
Immediate shutdown of output voltage while the input
voltage is below the turn-on threshold. Operation resumes
automatically and the output is enabled when the input
voltage has risen above the turn-on threshold.
The default response is option 2. The IUVP function can be
reconfigured using the PMBus commands
VIN_UV_FAULT_LIMIT (turn-off threshold),
VIN_UV_WARN_LIMIT (turn-on threshold) and
VIN_UV_FAULT_RESPONSE.
For products configured to operate in current sharing mode,
response option 1 will always be used, regardless of
VIN_UV_FAULT_RESPONSE command settings.
Input Over Voltage Protection (IOVP)
The product monitors the input voltage continuously and will
respond as configured when the input voltage rises above the
configured threshold level (see Electrical Specification). Refer
to section “Input Under Voltage Protection” for functionality,
response configuration options and default setting.
The IOVP function can be reconfigured using the PMBus
commands VIN_OV_FAULT_LIMIT (turn-off threshold),
VIN_OV_WARN_LIMIT (turn-on threshold) and
VIN_OV_FAULT_RESPONSE.
Input and Output Impedance
The impedance of both the input source and the load will
interact with the impedance of the product. It is important that
the input source has low characteristic impedance. If the input
voltage source contains significant inductance, the addition of
a capacitor with low ESR at the input of the product will ensure
stable operation.
External Input Capacitors
The product is a two-phase converter which gives lower input
ripple than a single phase design, see picture below. Thus,
ripple-current-rating requirements for the input capacitors are
lower relatively to a single phase converter.
The input ripple RMS current in a two-phase buck converter
can be estimated to
I inputRMS = I load D(0.5 − D)
(valid for D < 0.5)
Where I load is the output load current and D is the duty cycle.
The maximum load ripple current becomes I load/4. The ripple
current is divided into three parts, i.e., currents in the input
source, external input capacitor, and internal input capacitor.
How the current is divided depends on the impedance of the
input source, ESR and capacitance values in the capacitors.
For most applications non-tantalum capacitors are preferred
due to the robustness of such capacitors to accommodate
high inrush currents of systems being powered from very low
impedance sources. It is recommended to use a combination
of ceramic capacitors and low-ESR electrolytic/polymer bulk
capacitors. The low ESR of ceramic capacitors effectively
limits the input ripple voltage level, while the bulk capacitance
minimizes deviations in the input voltage at large load
transients.
If several products are connected in a phase spreading setup
the amount of input ripple current, and capacitance per
product, can be reduced. The amount of input ripple current
for such setup can be estimated using the Flex Power
Designer software and capacitor selection can be made based
on this number.
Ceramic input capacitors must be placed close to the input
pins of a converter and with low impedance connections to the
VIN and GND pins in order to be effective.
External Output Capacitors
The output capacitor requirement depends on two
considerations; output ripple voltage and load transient
response. To achieve low ripple voltage, the output capacitor
bank must have a low ESR value, which is achieved with
ceramic output capacitors. A low ESR value is critical also for
23
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3/1301-BMR465Technical Specification
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jidgezou
Checked
Input 7.5 - 14 V, Output up to 90 A / 162 W
a small output voltage deviation during load transients.
Designs with smaller load transients can use fewer capacitors
and designs with more dynamic load content will require more
load capacitors to minimize output voltage deviation. Improved
transient response can also be achieved by adjusting the
settings of the control loop of the product. Adding output
capacitance decreases loop band-width.
It is recommended to place low ESR ceramic and low ESR
electrolytic/polymer capacitors as close to the load as
possible, using several capacitors in parallel to lower the
effective ESR. It is important to use low resistance and low
inductance PCB layouts in order for capacitance to be
effective.
Optimization of output filter together with load step simulations
can be made using the Flex Power Designer software. See
application note AN321 for further guidelines on how to
choose and apply output capacitors.
Date
Rev
8/18/2020
1/28701-BMR465 Rev G
June 2021
D
© Flex
Load step 22.5–67.5–22.5 A, di/dt = 2 A/µs.
VI = 12 V, VO = 1.0 V, fsw = 320 kHz, Residual factor = 90.
Gain factor changed by PMBus command ASCR_CONFIG.
Voltage deviation vs. control loop gain setting and output capacitance.
The user may also adjust the residual factor, set by the
ASCR_CONFIG command, to improve the recovery time after
a load transient. The typical usable range of the residual factor
is 70 - 120. A higher value than 127 may damage the device
and must not be used. A graph below illustrates the effect of
the residual factor on the recovery time after a load transient.
Note that also the gain factor will affect the recovery time.
[µs]
130
110
10x100
μF +
10x470
μF/5 mΩ
90
Control Loop
The products use a fully digital control loop that achieves
precise control of the entire power conversion process,
resulting in a very flexible device that is also very easy to use.
The control loop utilizes oversampling of the output voltage
compared to the switching frequency, and a dual edge
modulation PWM, to minimize the delay in the control loop.
The actual duty cycle is updated after each sample within
each switching cycle, achieving a smaller total output voltage
variation with less output capacitance than traditional PWM
controllers, thus saving cost and board space.
Control may be set more or less aggressive by adjusting a
gain factor, set by the PMBus command ASCR_CONFIG.
Increasing the gain factor will reduce the voltage deviation at
load transients, at the expense of somewhat increased ripple
on the output. Too high gain can also cause increase in jitter
and instability. Stability analysis can be made using the Flex
Power Designer software. Below graph exemplifies the effect
of the gain factor on the voltage deviation during a load
transient. The typical range of the gain factor is 200 - 600.
[mV]
100
80
10x100
μF +
10x470
μF/5 mΩ
60
10x100
μF +
4x470
μF/5 mΩ
40
20
0
150
200
250
300
350
400
450
500
10x100
μF +
4x470
μF/5 mΩ
70
50
30
50
60
70
80
90
100
110
Load step 22.5–67.5–22.5 A, di/dt = 2 A/µs.
VI = 12 V, VO = 1.0 V, fsw = 320 kHz, Gain factor = 300.
Residual factor changed by PMBus command ASCR_CONFIG.
Recovery time vs.control loop residual setting and output capacitance.
By default the product is configured with a moderate gain
factor to provide a trade-off between load transient
performance and output ripple for a wide range of operating
conditions. For a specific application the gain factor can be
increased to improve load transient response.
Optimization of control loop settings and output filter, together
with load step simulations, can be made using the Flex Power
Designer software.
Remote Sense
The product has remote sense to compensate the voltage
drops between the output and the point of load. The sense
traces should be laid out as a differential pair and preferably
be shielded by the PCB ground layer to reduce noise
susceptibility. If the remote sense is not used, +S must be
connected to VOUT and −S must be connected to GND.
In cases where the external output filter includes an inductor
(forming a pi filter) according to the picture below, the
LEXT/CEXT resonant frequency places an upper limit on the
controller loop bandwidth. If the resonance frequency is high
the sense lines can be connected after the filter (as shown in
the picture) – if the resonant frequency is low and the DC drop
24
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Input 7.5 - 14 V, Output up to 90 A / 162 W
from LEXT is acceptable, sensing before the filter may be
better.
CO
LEXT
CEXT
Load
Vout
GND
-S
+S
External output filter with inductor (pi filter).
Enabling Output Voltage
The following options are available to enable and disable this
device:
1.
Output voltage is enabled through the CTRL pin.
2.
Output voltage is enabled using the PMBus command
OPERATION.
The CTRL pin can be used with active high (positive) logic or
active low (negative) logic.
The CTRL pin polarity can be reconfigured using the PMBus
command ON_OFF_CONFIG.
The CTRL pin has an internal 10 kΩ pull-up resistor to 5 V.
The external device must have a sufficient sink current ability
to be able pull CTRL pin voltage down below logic low
threshold
level (see Electrical Characteristics). When the CTRL pin is
left open, the voltage on the CTRL pin is pulled up to 5 V.
If the device is to be synchronized to an external clock source,
the clock frequency must be stable prior to enabling the output
voltage.
Output Voltage Adjust using Pin-strap Resistor
Using an external Pin-strap resistor, RSET, the output voltage
can be set to several predefined levels shown in the table
below. Only the voltage levels specified in the table can be set
by RSET. The resistor should be applied between the VSET pin
and the PREF pin as shown in the Typical Application Circuit.
Maximum 1% tolerance resistors are required.
Date
Rev
8/18/2020
1/28701-BMR465 Rev G
D
June 2021
© Flex
RSET [kΩ]
VOUT [V]
RSET [kΩ]
VOUT [V]
0 (short)
1.00
26.1
1.10
10
0.60
28.7
1.15
11
0.65
31.6
1.20
12.1
0.70
34.8
1.25
13.3
0.75
38.3
1.30
14.7
0.80
42.2
1.40
16.2
0.85
46.4
1.50
17.8
0.90
51.1
1.60
19.6
0.95
56.2
1.70
21.5
1.00
61.9
1.80
23.7
1.05
Infinite
(open)
1.20
RSET also sets the maximum output voltage; see section
Output Voltage Range Limitation. The resistor is sensed only
during the initialization procedure after application of input
voltage. Changing the resistor value during normal operation
will not change the output voltage. See Ordering Information
for output voltage range.
Output Voltage Adjust using PMBus
The output voltage set by pin-strap can be overridden up to a
certain level (see section Output Voltage Range Limitation) by
using the PMBus command VOUT_COMMAND. See
Electrical Specification for adjustment range.
Voltage Margining Up/Down
Using the PMBus interface it is possible to adjust the output
voltage to one of two predefined levels above or below the
nominal voltage setting in order to determine whether the load
device is capable of operating outside its specified supply
voltage range. This provides a convenient method for
dynamically testing the operation of the load circuit outside its
typical operating range. This functionality can also be used to
test of supply voltage supervisors. Margin limits of the nominal
output voltage ±5% are default, but the margin limits can be
reconfigured using the PMBus commands
VOUT_MARGIN_LOW and VOUT_MARGIN_HIGH.
Margining is activated by the command OPERATION and can
be used regardless of the output voltage being enabled by the
CTRL pin or by the PMBus.
Output Voltage Trim
The actual output voltage can be trimmed to optimize
performance of a specific load by setting a non-zero value for
PMBus command VOUT_TRIM. The value of VOUT_TRIM is
summed with the nominal output voltage set by
VOUT_COMMAND, allowing for multiple products to be
commanded to a common nominal value, but with slight
adjustments per load.
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Checked
Input 7.5 - 14 V, Output up to 90 A / 162 W
Output Voltage Range Limitation
The output voltage range that is possible to set by
configuration or by the PMBus interface is hardware limited by
the pin-strap resistor RSET. The maximum output voltage is set
to 115% of the output value defined by RSET. This protects the
application circuit from an over voltage due to an accidental
PMBus command.
The limitation applies to the actual regulated output voltage
rather than to the configured value. Thus, it is possible to write
and read back a VOUT_COMMAND value higher than the
limit, but the actual output voltage will be limited.
The output voltage limit can be reconfigured to a lower than
115% of Vout value by writing the PMBus command
VOUT_MAX.
Output Over Voltage Protection (OVP)
The product includes over voltage limiting circuitry for
protection of the load. The default OVP limit is 15% above the
nominal output voltage. The product can be configured to
respond in different ways to the output voltage exceeding the
OVP limit:
1.
Immediate and definite shutdown of output voltage until
the fault is cleared by PMBus command CLEAR_FAULTS
or the output voltage is re-enabled.
2.
Immediate shutdown of output voltage followed by
continuous restart attempts of the output voltage with a
preset interval (“hiccup” mode).
The default response is option 2. The OVP limit and fault
response can be reconfigured using the PMBus commands
VOUT_OV_FAULT_LIMIT, VOUT_OV_FAULT_RESPONSE
and OVUV_CONFIG.
For products configured to operate in current sharing mode,
response option 1 will always be used, regardless of this
command configuration.
Output Under Voltage Protection (UVP)
The product includes output under voltage limiting circuitry for
protection of the load. The default UVP limit is 15% below the
nominal output voltage. Refer to section Output Over Voltage
Protection for response configuration options and default
setting.
The UVP limit and fault response can be reconfigured using
the PMBus commands VOUT_UV_FAULT_LIMIT and
VOUT_UV_FAULT_RESPONSE.
Power Good
The power good pin (PG) indicates when the product is ready
to provide regulated output voltage to the load. During rampup and during a fault condition, PG is held low. By default, PG
is asserted high after the output has ramped to a voltage
above 90% of the nominal voltage, and deasserted if the
output voltage falls below 85% of the nominal voltage. These
thresholds may be changed using the PMBus commands
POWER_GOOD_ON and VOUT_UV_FAULT_LIMIT.
Date
Rev
8/18/2020
1/28701-BMR465 Rev G
D
June 2021
© Flex
The time between when the POWER_GOOD_ON threshold is
reached and when the PG pin is actually asserted is set by the
PMBus command POWER_GOOD_DELAY. See Electrical
Specification for default value and range.
By default the PG pin is configured as an open drain output
but it is also possible to set the output in push-pull mode by
the command USER_CONFIG.
The PG output is not defined during ramp up of the input
voltage due to the initialization of the product.
Over Current Protection (OCP)
The product includes robust current limiting circuitry for
protection at continuous overload. After ramp-up is complete
the product can detect an output overload/short condition. The
following OCP response options are available:
1.
Immediate and definite shutdown of output voltage until
the fault is cleared by PMBus command CLEAR_FAULTS
or the output voltage is re-enabled.
2.
Immediate shutdown of output voltage followed by
continuous restart attempts of the output voltage with a
preset interval (“hiccup” mode).
The default response from an over current fault is option 2.
Note that delayed shutdown is not supported. The load
distribution should be designed for the maximum output short
circuit current specified. The OCP limit and response can be
reconfigured using the PMBus commands
IOUT_AVG_OC_FAULT_LIMIT and
MFR_IOUT_OC_FAULT_RESPONSE.
For products operated in current sharing mode, response
option 1 will always be used, regardless of configuration.
Under Current Protection (UCP)
The product includes robust current limiting circuitry for
protection at continuous reversed current, due to a
synchronous rectifier ability to sink current. Refer to section
Over Current Protection for response configuration options
and default setting. The UCP limit and response can be
reconfigured using the PMBus commands
IOUT_AVG_UC_FAULT_LIMIT and
MFR_IOUT_UC_FAULT_RESPONSE.
Switching Frequency
The default switching frequency is chosen as the best tradeoff
between efficiency and thermal performance, output ripple and
load transient performance. The switching frequency can be
re-configured in a certain range using the PMBus command
FREQUENCY_SWITCH. Refer to Electrical Specification for
default switching frequency and range.
Changing the switching frequency will affect efficiency and
power dissipation, load transient response (control loop
characteristics) and output ripple. Control loop settings may
need to be adjusted.
Note that since the product has two phases the effective
26
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PRODUCT SPECIFICATION
Prepared (Subject resp)
9 (14)
No.
3/1301-BMR465Technical Specification
jidgezou George Zou
Approved (Document resp)
BMR465George
seriesZou
PoL Regulators
jidgezou
Checked
Input 7.5 - 14 V, Output up to 90 A / 162 W
Date
Rev
8/18/2020
1/28701-BMR465 Rev G
June 2021
D
© Flex
switching frequency will be twice the configured.
Addressing).
Synchronization
Two or more products may be synchronized with an external
clock to eliminate beat frequencies reflected back to the input
supply rail. Eliminating the slow beat frequencies (usually
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