DSQ/DAQ/DCQ Series
www.murata-ps.com
600W Quarter Brick
DOSA Digital PMBus Interface
Output Voltage (V)
Output Current (A)
Input Voltage (V)
12
50
36-75
PRODUCT OVERVIEW
FEATURES
DOSA Compliant Digital Quarter-Brick with PMBus
interface
36-75Vin Range
96% Typical Efficiency
Delivers up to 50A (600W)
Low Output Ripple & Noise
Wide Operating Temperature Range -40°C to +85°C
Optional Droop Load Sharing of two or more modules
Baseplate included for improved thermal
performance
Output Over Current/Voltage Protection
Murata Power Solutions is introducing the first in a
series of DOSA compliant, digitally controlled DC-DC
converters that are based on a 32-bit ARM processor. The DSQ series provides a fully regulated, digitally controlled DC output in a ¼-brick format that will
support the DOSA industry standard footprint for isolated board mounted power modules. The DSQ series
supports advances in power conversion technology
including a digital interface supporting the PMBus
protocol for communications to power modules. The
DSQ0150V2 is an isolated, regulated, 600W-12Vout
quarter brick that supports the TNV (Telecommunications Network Voltage) input voltage range of 36V–
75V with a typical efficiency of 96%. The DSQ series
also incorporates a “droop” load sharing option that
allows connecting two or more units together in parallel for demanding power-hungry applications or to
provide redundancy in high reliability applications. The
converter also offers high input to output of 2250 VDC
as required for Power over Ethernet (PoE) applications.
The DSQ series is suitable for applications covering
MicroTCA, servers and storage applications, networking equipment, Telecommunications equipment, Power
over Ethernet (PoE), fan trays, wireless networks, wireless pre-amplifiers, and industrial and test equipment,
along with other applications requiring a regulated 12V.
Over Temperature Protection
Negative & Positive Logic (Negative Logic standard
configuration)
Optional Reflow process compatible
Three pin/function configurations available:
• Full PMBus with Sense & Trim Pins
• No PMBus with Sense & Trim Pins
• 5 Pin Bus converter, No Sense & Trim Pins
Certified to UL 62368-1, CAN/CSA-C22.2
No.62368-1-14, 2nd Ed, 2014-12-01; IEC623681:2014 (Second Edition); standards
Basic I/O insulation now available. Refer to
Note [3] on following page for applicable model
information
DSQ
DAQ
Applications
Distributed Power Architectures
Intermediate Bus Voltage Applications
Networking Equipment including POE applications
Servers & Storage Applications
Fan Tray assemblies along with other applications
requiring a regulated Voltage source
DCQ
For full details go to
www.murata-ps.com/rohs
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SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 1 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE [1]
Output
Input
Root Model
Vout
(V)
IOUT
(A, max.)
Total Power
(W)
Ripple & Noise
(mVp-p)
DSQ0150V2
DAQ0150V2
DCQ0150V2
12
12
12
50
50
50
600
600
600
120
120
120
Regulation
(Typ.)
Line
Load
(mV)
(mV)
75
75
75
45
45
45
Efficiency
Vin
(V, Nom.)
Range
(V)
Iin, full load@Vinmin
(A)
Typ.
48
48
48
36-75
36-75
36-75
17.5
17.5
17.5
96.00%
96.00%
96.00%
Notes:
[1] Typical at TA = +25°C under nominal line voltage and full-load conditions. All models are specified with an external 1μF multi-layer ceramic and 10μF capacitors across their
output pins.
Part Number Structure*
Product Family[1]
Form Factor
Vout
Output Current
Vin Range
Logic
D
S
Q
01
50
V2
N
Pin Length[2]
Mechanical Configuration
Load Sharing
Reflow Compliant[2]
Specific Customer Configuration
RoHS 6/6
X
B
S
R
X
X
X
DS = DOSA Standard Digital Quarter Brick W/Sense & Trim,1 W/PMbus
DA = DOSA Analog Quarter Brick W/Sense & Trim, No PMbus
DC = DOSA Analog Quarter Brick ( 5 pin IBC )
Q = Quarter Brick
01 = 12Vout , 02 = 5Vout , 03 = 3.3Vout
Max Iout in Amps
V2 = 36-75Vin
N = Negative Logic, P = Positive Logic
1 = 0.110"(2.79 mm), 2 = 0.145"(3.68mm), Omit for standard pin length( shown in
the mechanical drawings)
B = Baseplate
S = Load Sharing, Omit for standard
R = MSL-3 Compliant Packaging, Omit for Standard through hole processing
Customer Code, Omit for Standard
C RoHS 6/6 Compliant
*See www.murata.com/power/products for model-specific availability.
Example Part Number DSQ0150V2N2BRSC DOSA Digital Quarter Brick, 12Vout@50A, Negative logic, 0.145” pin length, Baseplate, Reflow/MSL-3 compliant, Load Sharing, RoHS 6/6.
[1] Load Sharing on DSQ ( with PMbus ) will not include Sense & Trim pins. Loading Sharing is not available on DAQ.
[2] Minimum order quantity is required. Samples available with standard pin length only.
[3] Basic I/O insulation available on DSQ0150V2NBSCAPD (PMBus 1/4tr brick, 12Vout @ 50A, 36-75Vin, Negative Logic, Baseplate, Load Share, RoHS, Basic I/O insulation)
www.murata-ps.com/support
SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 2 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
FUNCTIONAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Conditions [1]
Minimum
Typical/Nominal
Maximum
Units
Input Voltage, Continuous
0
75
Vdc
Input Voltage, Transient
100 ms max. duration
100
Vdc
Voltage
Input to output
2250
Vdc
On/Off Remote Control
Power on, referred to -Vin
0
13.5
Vdc
Output Power
0
612
W
Output Current
Current-limited, no damage, short-circuit protected
0
50
A
Storage Temperature Range
Vin = Zero (no power)
-55
125
°C
Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than
those listed in the Performance/Functional Specifications Table is not implied nor recommended.
General Conditions for Device under Test unless otherwise specified:
Typical at ambient temperature +25°C, nominal line voltage and nominal load conditions; All models are specified with an external 220μF input capacitor and 1μF & 10μf capacitors across
their output pins.
INPUT
Operating voltage range (V2)
36
48
75
Vdc
Start-up threshold
(Default, configurable via PMBus)
32
34
36
Vdc
Undervoltage shutdown
(Default, configurable via PMBus)
30
32
34
Vdc
Internal Filter Type
Pi
External Input fuse
30
A
Input current
Full Load Conditions
Vin = nominal
13.00
13.50
A
Low Line input current
Vin = minimum
17.50
18.00
A
Inrush Transient
Vin = 48V.
0.7
1
A2-Sec.
Short Circuit input current
0.1
0.2
A
No Load input current
Vin = 48V,Iout =0, unit=ON
80
110
mA
Shut-Down input current (Off, UV,
30
mA
OT)
Back Ripple Current
no filtering
1.5
Ap-p
GENERAL AND SAFETY
Efficiency
Vin=48V, full load
94.5
96
%
Input to output
2250
Vdc
Voltage
Input to Baseplate
1500
Vdc
Output to Baseplate
1500
Vdc
Insulation Safety Rating
Contact the factory for Basic Insulation
Functional
Resistance
10
MΩ
Capacitance
1500
pF
Certified to UL62368-1, CAN/CSA-C22.2 No.62368-1-14, 2nd Ed,
Yes
Safety
2014-12-01; IEC62368-1:2014 (Second Edition)
Calculated MTBF
Per Telcordia SR-332, Issue 3, Method 1, Case 1, Ground Fixed
5000
Hours x 103
DYNAMIC CHARACTERISTICS
Switching Frequency (Configurable via PMBus)
Fixed Frequency Control
180
kHz
Variable Frequency Control
NA
kHz
(Default)
Turn On Time (Configurable via PMBus)
Vin On to within 10% Vout steady
80
90
ms
state
Remote On to within 10% Vout
5
ms
steady state
Vout Rise Time (Default, Configurable via PMBus)
From 10%~90%
30
ms
50-75-50%, 0.1A/us,within 1% of Vout (Vin=Vinnom, tested with a 1.0
Dynamic Load Response
200
300
µSec
μF ceramic, 10 μF tantalum and 330μF low ESR polymer
Dynamic Load Peak Deviation
±250
±350
mV
capacitor across the load.)
Dynamic Load Response
50-75-50%, 1A/us,within 1% of Vout (Vin=Vinnom, tested with a 1.0 μF
300
750
µSec
ceramic, 10 μF tantalum and 330μF low ESR polymer
Dynamic Load Peak Deviation
±500
±750
mV
capacitor across the load.)
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SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 3 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
FEATURES AND OPTIONS
Conditions
Remote On/Off Control Click link for additional information in technical notes section
Primary On/Off control (suitable for driving open collector logic; voltages referenced to -Vin)
“P” Suffix:
Positive Logic, ON state
ON = pin open or external voltage
Positive Logic, OFF state
OFF = ground pin or external voltage
Control Current
open collector/drain
“N” suffix:
Negative Logic, ON state
ON = ground pin or external voltage
Negative Logic, OFF state
OFF = pin open or external voltage
Control Current
open collector/drain
Remote Sense Compliance
Sense pins connected externally to respective Vout pins
OUTPUT
Total Output Power
Voltage
Initial Output Voltage
VIN = 48V Iout = 0A temp = 25C, both with/without "S" suffix
" VOUT_DROOP = 0mohm
Output Voltage(without"S" suffix)
All conditions"
" VOUT_DROOP =7mohm
Output Voltage(with"S" suffix)
All conditions"
Output Adjust Range(without"S"
Hardware TRIM
suffix)
Trim Down: Trim (pin #6) to -Vout
Rt down (kΩ) =5.11/((Vonom-Vo)/Vonom)-10.22
Sense (pin #5)
"Rt up(kΩ)= 5.11*Vonom*(1+Δ)/(1.225*Δ)-5.11/Δ-10.22
Trim Up: Trim (pin #6) to +Vout
Sense (pin #7)
Δ=|(Vonom-Vo)/Vonom|"
Overvoltage Protection
Configurable via PMBus
Voltage Droop
Default, configurable via PMBus
Voltage Droop, for S suffix
Default, configurable via PMBus
Current
Output Current Range
Minimum Load
90% of Vnom., after warm-up, Configurable via PMBus(Need check the
Current Limit Inception
OCP Inception of Vout is whether reasonable)
Short Circuit
Short Circuit Current
Hiccup technique, autorecovery within 1% of Vout
Short Circuit Duration
Output shorted to ground, no damage
(remove short for recovery)
Short circuit protection method
Hiccup current limiting
Regulation
Line Regulation
Vin = 36-75, Vout = nom., full load
"Iout = min. to max., Vin = nom.
Load Regulation(without " S
"suffix
|Vout@min_load-Vout@max_load| "
"Iout = min to max
Load Regulation(with" S "suffix
Vin = nom. @cold condition
|Vout@min_load-Vout@max_load-Iout*VOUT_DROOP|"
"(Vin=Vinnom and Io=Iomin to Iomax, tested with a 1.0 μF
Ripple and Noise
ceramic, 10 μF tantalum and 330μF low ESR polymer
capacitor across the load.)"
Temperature Coefficient
Maximum Output Capacitance
PMBUS MONITORING ACCURACY
VIN_READ
VOUT_READ
IOUT_READ
TEMP_READ
Minimum
Maximum
Units
0.1
13.5
0.8
0.2
V
V
mA
0.8
13.5
0.2
10
V
V
mA
%
612
W
3.5
0
-0.1
3.5
0.1
0
600
11.98
12.02
Vdc
11.76
12
12.24
Vdc
(12.000-Iout*0.007)*0.98
12.000-Iout*0.007
(12.000-Iout*0.007)*1.02
Vdc
13.2
Vdc
9.6
%
-20
+10
%
13.8
14.4
0
7
15.6
Vdc
mΩ
mΩ
0
50
No minimum load
50
A
56
60
65
A
0.4
1
A
75
mV
45
mV
120
mV
120
150
mV pk-pk
0.01
0.02
Continuous
Non-latching
330
10,000
% of
Vnom./°C
μF
-3
-2
-2
-5
3
2
2
5
%
%
A
°C
At all outputs
Low ESR
Typical/Nominal
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SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 4 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
MECHANICAL
Conditions
Outline Dimensions
Weight
Through Hole Pin Diameter
Digital Interface Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
Nickel subplate
Gold overplate
Minimum
Typical/Nominal
2.3 x 1.45 x 0.52
58.4 x 36.80 x
13.21
2.35
66.8
0.04 & 0.062
1.016 & 1.575
0.02
0.5
Copper alloy
98.4-299
4.7-19.6
Maximum
Units
Inches
mm
Ounces
Grams
Inches
mm
µ-inches
µ-inches
ENVIRONMENTAL
Operating Ambient Temperature
with derating
-40
85
°C
Range
Operating Baseplate Temperature
-40
110
°C
Storage Temperature
Vin = Zero (no power)
-55
125
°C
Thermal Protection/Shutdown (with
"B" Suffix, default value, ConfigurConfigurable Via PMBus
128
°C
able via PMBUS)
Electromagnetic Interference
External filter required; see
B
Class
Conducted, EN55022/CISPR22
emissions performance test.
Notes:
[1] Typical at TA=+25°C under nominal line voltage and full-load conditions. All models are specified with an external 1μF Multi-layer ceramic and 10μF capacitors across their output pins.
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SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 5 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
PERFORMANCE DATA
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SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 6 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
PERFORMANCE DATA
Figure 7. Ripple/Noise @+25°C
(Vin=48V, Iout=0A, Cload=330μF, ScopeBW=20MHz, 2μS/div, 50mV/div)
Figure 8. Ripple/Noise @+25°C
(Vin=48V, Iout=50A, Cload=330μF, ScopeBW=20MHz, 2μS/div, 50mV/div)
Figure 9. Enable Start-up Delay (CH2: Vout, CH4: On/Off)
(Vin=48V, Iout=0A, Cload=330μF, Ta=+25°C, 5ms/div)
Figure 10. Enable Start-up Delay (CH2: Vout, CH4: On/Off)
(Vin=48V, Iout=50A, Cload=330μF, Ta=+25°C, 5ms/div)
Figure 11. Vin Start-up Delay (CH2: Vout, CH1: Vin)
(Vin=48V, Iout=0A, Cload=330μF, Ta=+25°C, 20ms/div)
Figure 12. Vin Start-up Delay (CH2: Vout, CH1: Vin)
(Vin=48V, Iout=50A, Cload=330μF, Ta=+25°C, 20ms/div)
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SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 7 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
MECHANICAL SPECIFICATIONS
1.860
1.030
0.220
M3 TYP 3PL
L
0.52 Max★
SEE NOTE 4
SIDE VIEW
MFG PLANE
0.040 Pin 1-3
0.076 Pin 1-3
2.000★
0.01 Min ★
TOP VIEW
1.45★
0.210
2.30★
0.06 Pin 4,8
0.098 Pin 4,8
3
2
1
Material:
Dia 0.040 PINS: COPPER ALLOY
FINISH: (ALL PINS)
GOLD (5µ”MIN), OVER NICKEL (100µ”MIN)
4
5
6
7
8
9
10
11
12
13
14
15
0.600
0.300
BOTTOM VIEW
0.600
0.05 Min
0.04 Min
NOTES:
UNLESS OTHERWISE SPECIFIED
[1] M3 SCREW USED TO BOLT UNIT’S BASEPLATE TO OTHER SURFACES (SUCH AS HEATSINK) MUST NOT EXCEED
0.110’’ (2.8mm) DEPTH BELOW THE SURFACE OF BASEPLATE.
[2] APPLIED TORQUE PER SCREW SHOULD NOT EXCEED 5.3In-Ib (0.6Nm).
[3] ALL DIMENSION ARE IN INCHES (MILLIMETER).
[4] STANDARD PIN LENGTH: 0.180Inch.
[5] FOR L2 PIN LENGTH OPTION IN MODEL NAME., USE STANDARD L2 PIN WITH PIN LENGTH TO 0.145Inch.
[6] ALL TOLERANCES:
x.xxin, ±0.02in (x.xmm,±0.5mm)
x.xxxin, ±0.01in (x.xxmm, ±0.25mm).
[7] COMPONENTS WILL VARY BETWEEN MODELS.
Please refer to the part number structure for alternate pin lengths.
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SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 8 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
0.440 [11.18]
0.504 [12.80]
0.583 [14.81]
0.590 [14.99]
0.661 [16.79]
0.740 [18.80]
0.819 [20.80]
0.890 [22.61]
0.897 [22.78]
0.976 [24.79]
1.040 [26.42]
1.48 [37.60]
1.04 [26.42]
0.74 [18.80]
0.44 [11.18]
RECOMMENDED FOOTPRINT
0.055 [1.40] TYP 6PL
8
1
7
6
2
5
4
3
15
14
13
12
11
10
9
0.032 [0.80] TYP 7PL
0.075 [1.91] TYP 2PL
0.165 [4.19]
2.000 [50.80]
0.100 [2.54]
2.33 [59.2]
INPUT/OUTPUT CONNECTIONS
PIN
Name
Input/Output
1
Vin+
Output
2
On/Off
Input
3
4
VinVout-
Output
Output
5
Sense-
6
Function
Converter’s Input Voltage positive connection
DSQ
Without “S” Option
With “S” option
•
•
DAQ
DCQ
•
•
Remote on/off control, Refer to technical notes section “Remote On/Off Control” for
details
•
•
•
•
Input Voltage negative connection
Converter’s main output voltage return connection
•
•
•
•
•
•
•
•
Input
Sense inputs to compensate output voltage inaccuracy delivered at the load, refer to
technical notes section “Remote Sense Input” for detail description
•
•
Trim
Input
Output voltage can be trimmed up or down by external connection of a resistor
between Trim pin and either Sense pin. Refer to technical notes section “TRIM” for
details
•
•
7
Sense+
Input
Sense inputs to compensate output voltage inaccuracy delivered at the load, Refer to
technical notes section “Remote Sense Input” for details
•
•
8
Vout+
Output
Converter’s main output voltage + connection
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
9
PGood
Output
Power good function; refer to technical notes section “Power Good”
TTL level: Output Low < 0.4V; Output High > 2.4V; Output sinking/sourcing current
max: 4mA
10
Sig_Gnd
Output
Return ground for PMBUS and PGood. It is recommend to design independent signal
ground separate from the power ground to minimize noise interference
11
12
13
14
15
Data
SMBALERT#
Clock
Addr1
Addr0
Input/Output
Output
Refer to section “PMBus” for details; Internal pull up: 10k
Input/Output
Input
Input
Connect resistor to GND to configure PMBUS address per “PMBus Addressing”
details in the PMBus Section
•
•
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SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 9 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
SHIPPING TRAYS AND BOXES, THROUGH-HOLE MOUNT
Shipping Tray Base(PAD)
0.74inch thick
Shipping Tray,1/4 brick(15
cavity)
Shipping Box, 10inch x
10inch x 2.5 inch (30
units per carton)
SHIPPING TRAY DIMENSIONS
Label, 1.0 inch x 1.5 inch
paper
11.25
REF
10.50 REF
Label used for MFR overpack
carton
2.75
REF
ESD tape, front flap shall be
sealed with ESD Tape specified
or equivalent after the box is
closed.
Label , pre-printed ESD attention; apply ESD
label over tape to seal box
CLOSED CARTON
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SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 10 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
SHIPPING TRAYS DIMENSIONS
Material: LOW DENSITY CLOSED CELL POLYETHYLENE STATIC DISSIPATIVE FOAM
9.92
5
.2
R0
0.25 CHAMFER TYP 4PL
1.45
1.825
0.57
9.92
3.025
2.40
A
A
0.2
5
0.500
0.875
0.38
0.38
SECTION A-A
SCALE 1 : 3
Dimensions are in inches shown for ref. only.
Third Angle Projection
Tolerances (unless otherwise specified):
.XX ± 0.02
.XXX ± 0.010
Angles ± 1˚
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SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 11 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
SHIPPING TRAYS AND BOXES FOR R-OPTION
1/4brick Frame, each
tray is 3*5=15units
Output
end of
converters
Input end
of converters
1/4” hold in one corner of foam tray added to visually
control converter orientations
Humidity Inductor Card
Co-Free
Desiccan Tyver Pouch
Label Fab 4.0”x6.0”Shipping label
ESD anti-moisture bag 330mmx380mm
Label Paper
285
.75
Shipping Tray Base
0.75”thick
ESD Attention Label over
tape sued to seal box
REF
Apply
manufacture label as shown
69.85
REF
266.70 REF
Shipping box 10”x10”x2.5”
OUTER CARTON
SHIPPING TRAYS DIMENSIONS For R-OPTION
Material: LOW DENSITY CLOSED CELL POLYETHYLENE STATIC DISSIPATIVE FOAM
9.92
5
.2
R0
0.25 CHAMFER TYP 4PL
1.45
1.825
0.57
9.92
3.025
2.40
A
A
Dimensions are in inches shown for ref. only.
Third Angle Projection
0.2
5
0.500
0.875
0.38
0.38
Tolerances (unless otherwise specified):
.XX ± 0.02
.XXX ± 0.010
Angles ± 1˚
SECTION A-A
SCALE 1 : 3
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SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 12 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
TECHNICAL & APPLICATIONS OVERVIEW
Power Management Overview and PMBus Interface (Applicable Models)
A wide range of parameters can be read and configured by the system/host by
using PMBus™ digital communications.
Each module is provided pre-configured for a wide range operation. Refer to the
PMBus™ Interface section for details.
SMBAERT# Hardware Signal (Applicable Models)
is at no load. The output voltage will decrease when the load current is increased.
The voltage will drop 0.35V while load reaches max load. Our goal is to have each
converter contribute nearly identical current into the output load under all input,
environmental and load conditions.
CAUTION: This converter is not internally fused. To avoid danger to persons or
equipment and to retain safety certification, the user must connect an external
fast-blow input fuse as listed in the specifications. Be sure that the PC board pad
area and etch size are adequate to provide enough current so that the fuse will
blow with an overload.
SMBALERT# signal offers an alternate method for system/host notification that a
fault or Warning has been detected (mirrors the STATUS_X fault/warn register bits)
within the module and is useful in applications requiring real time fault notification independent or in addition to reading PMBus™ STATUS_X register fault bits
which may not be read by system/host frequently enough to detect that a fault/
warning bit flag was set.
Using Parallel Connections – Redundancy (N+1)
Internally driven low 2.4Vdc to indicate no fault conditions within power module are
detected.
Soft-start Power Up
The default rise time of the ramp up is 30ms. When starting by applying input voltage the control circuit boot-up time adds an additional 10ms delay. The soft-start
power up of the module can be reconfigured using the PMBus interface.
Output Over Voltage Protection (OVP)
Both OVP limit and response can be configured via PMBus command (See PMBus
Command 40h VOUT_OV_FAULT_LIMIT for details). The default output OVP limit is
set to 20% above nominal output voltage and responds by immediately shutdown
of main output and restarts when the fault condition no longer exists.
Over Current Protection (OCP, Current limit)
The module includes current limiting circuitry for protection at continuous over
load. The default setting for the product is hiccup mode. The current limit can be
configured by PMBus command 0x46, IOUT_OC_FAULT_LIMIT, to be greater than
the IOUT_OC_WARN_LIMIT (PMBus Command 0x4A). The maximum value that
the current limit could be set is 50A.
Power Good
The module provides Power Good (PG) flag in the STATUS_WORD register that
indicates the output voltage is within a specified tolerance of its target level and no
fault condition exists. The Power Good pin default logic is negative and it can be
configured by MFR_PGOOD_POLARITY.
Parallel Load Sharing (S Option, Droop Load Sharing)
Two or more converters may be connected in parallel at both the input and
output terminals to support higher output current or to improve reliability due to
the reduced stress that result when the modules are operating below their rated
limits. For applications requiring current share, followed the guidelines below. The
products have a pre-configured voltage droop. The stated output voltage set point
The redundancy connections require external user supplied “OR”ing diodes or
“OR”ing MOSFETs for reliability purposes. The diodes allow for an uninterruptible
power system operation in case of a catastrophic failure (shorted output) by one of
the converters.
Schottky power diodes with approximately 0.3V drops or “OR”ing MOSFETs may
be suitable in the loop whereas 0.7 V silicon power diodes may not be advisable.
In the event of an internal device fault or failure of the mains power modules on
the primary side, the other devices automatically take over the entire supply of
the loads. In the basic N+1 power system, the “N” equals the number of modules
required to fully power the system and “+1” equals one back-up module that will
take over for a failed module. If the system consists of two power modules, each
providing 50% of the total load power under normal operation and one module
fails, another one delivers full power to the load. This means you can use smaller
and less expensive power converters as the redundant elements, while achieving
the goal of increased availability.
Start Up Considerations
When power is first applied to the DC-DC converter, there is some risk of startup
difficulties if you do not have both low AC and DC impedance and adequate
regulation of the input source. Make sure that your source supply does not allow
the instantaneous input voltage to go below the minimum voltage at all times. Use
a moderate size capacitor very close to the input terminals. You may need two or
more parallel capacitors. A larger electrolytic or ceramic cap supplies the surge
current and a smaller parallel low-ESR ceramic cap gives low AC impedance.
Remember that the input current is carried both by the wiring and the ground
plane return. Make sure the ground plane uses adequate thickness copper. Run
additional bus wire if necessary.
Input Fusing
Certain applications and/or safety agencies may require fuses at the inputs of
power conversion components. Fuses should also be used when there is the possibility of sustained input voltage reversal which is not current-limited. For greatest
safety, we recommend a fast blow fuse installed in the ungrounded input supply
line.
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SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 13 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
Input Under-Voltage Shutdown and Start-Up Threshold
Converters will not begin to fully regulate until the rising input voltage exceeds and
remains at the Start-Up Threshold Voltage (see Specifications). Once operating,
converters will not turn off until the input voltage drops below the Under-Voltage
Shutdown Limit. Subsequent restart will not occur until the input voltage rises
again above the Start-Up Threshold. This built-in hysteresis prevents any unstable
on/off operation at a single input voltage. The over/under-voltage fault level and
fault response and hysteresis can be configured via the PMBus interface. See
commands 0x55 (VIN_OV_FAULT_LIMIT) and 0x59 (VIN_UV_FAULT_LIMIT) in the
PMBus command list for additional details
Start-Up Time
Turn-on time (see Specifications) is the time interval between the point when the
rising input voltage crosses the Start-Up Threshold and the output voltage rises to
within 10% of regulation point.
These converters include a soft start circuit to control Vout ramp time, thereby
limiting the input inrush current.
To
Oscilloscope
Current
Probe
Lbus
+Vin
Vin
Cbus
Cin
-Vin
Cin = 220uF, ESR < 700mΩ @ 100kHz
Cbus = 220uF, ESR < 100mΩ @ 100kHz
Lbus = 12uH
Figure 14. Measuring Input Ripple Current
+Vout
The On/Off Remote Control interval from On command to Vout (final ±10%)
assumes that the converter already has its input voltage stabilized above the
Start-Up Threshold before the On command. The interval is measured from the On
command until the output enters and remains within its specified accuracy band.
See PMBus command 0x60 (TON_DELAY) for additional configuration details
Recommended Input Filtering
C1
Recommended Output Filtering
SCOPE
Rload
-Vout
The user must assure that the input source has low AC impedance to provide
dynamic stability and that the input supply has little or no inductive content, including long distributed wiring to a remote power supply. The converter will operate
with no additional external capacitance if these conditions are met.
For best performance, we recommend installing a low-ESR capacitor immediately adjacent to the converter’s input terminals. The capacitor should be a
ceramic type such as the Murata GRM32 series or a polymer type. More input bulk
capacitance may be added in parallel (either electrolytic or tantalum) if needed.
C2
C1 = 1uF; C2 = 10uF
LOAD 2-3 INCHES(51-76mm) FROM MODULE
Figure 15. Measuring Output Ripple and Noise (PARD)
Minimum Output Loading Requirements
All models regulate within specification and are stable under no load to full load
conditions.
This series achieves it’s rated output ripple and noise without additional external
capacitance. However, the user may install external output capacitance to further
improve ripple or for improved dynamic response, however low-ESR ceramic
(Murata GRM32 series) or polymer capacitors must be used and mounted close to
the converter using only as much capacitance as required to achieve your ripple
and noise objectives. Excessive capacitance may make step load recovery sluggish
and/or introduce instability. Never exceed the maximum rated output capacitance
listed in the specifications.
Thermal Shutdown (OTP)
Input Ripple Current and Output Noise
CAUTION: If you operate too close to the thermal limits, the converter may shut
down suddenly without warning. Be sure to thoroughly test your application to
avoid unplanned thermal shutdown.
All models in this converter series are tested and specified for input reflected ripple
current and output noise using designated external input/output components,
circuits and layout as shown in the figures below. The Cbus and Lbus components
simulate a typical DC voltage bus.
This series includes thermal sense and shutdown circuitry that protects itself from
overtemperature conditions. Upon detection of overtemperature condition defined
by PMBus command 0x4F “OT_FAULT_LIMIT”, the module enters OTP and shuts
down. Once the temperature falls below restart threshold, as defined in PMBus
command list, (OT_FAULT_LIMIT, 0x4F and MFR_OT_ FAULT_HYS, 0xEA), the
module automatically restarts. OTP fault limit and recovery hysteresis are configurable via PMBus.
Temperature Derating Curves
The graphs in this data sheet illustrate typical operation under a variety of conditions. The Derating curves show the maximum continuous ambient air temperature
and decreasing maximum output current which is acceptable under increasing
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SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 14 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
forced airflow measured in Linear Feet per Minute (“LFM”). Note that these are
AVERAGE measurements. The converter will accept brief increases in current or
reduced airflow as long as the average is not exceeded.
Note that the temperatures are of the ambient airflow, not the converter itself
which is obviously running at higher temperature than the outside air. Also note
that “natural convection” is defined as very flow rates which are not using fanforced airflow. Depending on the application, “natural convection” is usually about
30-65 LFM but is not equal to still air (0 LFM).
Murata Power Solutions makes Characterization measurements in a closed
cycle wind tunnel with calibrated airflow. We use both thermocouples and an
infrared camera system to observe thermal performance. As a practical matter, it is
quite difficult to insert an anemometer to precisely measure airflow in most applications. Sometimes it is possible to estimate the effective airflow if you thoroughly
understand the enclosure geometry, entry/exit orifice areas and the fan flow rate
specifications.
Output Capacitive Load
These converters do not require external capacitance added to achieve rated
specifications. Users should only consider adding capacitance to reduce switching
noise and/or to handle spike current load steps. Install only enough capacitance
to achieve noise objectives. Excess external capacitance may cause degraded
transient response and possible oscillation or instability.
Remote Sense Input
Use the Sense inputs with caution. Sense is normally connected at the load. Sense
inputs compensate for output voltage inaccuracy delivered at the load. This is done
by correcting IR voltage drops along the output wiring and the current carrying
capacity of PC board etches. This output drop (the difference between Sense and
Vout when measured at the converter) should not exceed 0.5V. Consider using
heavier wire if this drop is excessive. Sense inputs also improve the stability of the
converter and load system by optimizing the control loop phase margin.
CAUTION: If you exceed these Derating guidelines, the converter may have an
unplanned Over Temperature shut down. Also, these graphs are all collected near
Sea Level altitude. Be sure to reduce the derating for higher altitude.
Output Short Circuit Condition
The short circuit condition is an extension of the “Current Limiting” condition. When
the monitored peak current signal reaches a certain range, the PWM controller’s
outputs are shut off thereby turning the converter “off.” This is followed by an
extended time out period. This period can vary depending on other conditions such
as the input voltage level. Following this time out period, the PWM controller will
attempt to re-start the converter by initiating a “normal start cycle” which includes
soft start. If the “fault condition” persists, another “hiccup” cycle is initiated. This
“cycle” can and will continue indefinitely until such time as the “fault condition” is
removed, at which time the converter will resume “normal operation.” Operating in
the “hiccup” mode during a fault condition is advantageous in that average input
and output power levels are held low preventing excessive internal increases in
temperature.
Remote On/Off Control
The DSQ series modules are equipped with an On/Off control pin (internal pull
up, TTL open-collector and/or CMOS open-drain compatible) and is configurable
via PMBus interface. Output is enabled when the On/Off is grounded or brought
to within a low voltage (see specifications) with respect to –Vin. The device is off
(disabled) when the On/Off is left open or is pulled high to +13.5Vdc with respect
to –Vin. The On/Off function allows the module to be turned on/off by an external
device switch.
The restart delay for this module to turn On/Off by the On/Off control pin is
200ms.
On/Off can be configured by PMBus command 0xDD (MFR_PRIMARY_ON_
OFF_ CONFIG); default configuration does not ignore the control pin and therefore
requires the On/Off control pin to be asserted to start the unit.
On/Off status is dependent on On/Off control and OPERATION (PMBus command) status; both must be ON to turn DSQ on; if one of them is OFF, unit will be
turned off.
Figure 16. Remote Sense Circuit Configuration
Note: The Sense input and power Vout lines are internally connected through
low value resistors to their respective polarities so that the converter can operate
without external connection to the Sense. Nevertheless, if the Sense function is not
used for remote regulation, the user should connect +Sense to +Vout and –Sense
to –Vout at the converter pins.
The remote Sense lines carry very little current. They are also capacitively coupled to the output lines and therefore are in the feedback control loop to regulate
and stabilize the output. As such, they are not low impedance inputs and must be
treated with care in PC board layouts. Sense lines on the PCB should run adjacent
to DC signals, preferably Ground. In cables and discrete wiring, use twisted pair,
shielded tubing or similar techniques.
Any long, distributed wiring and/or significant inductance introduced into the
Sense control loop can adversely affect overall system stability. If in doubt, test
your applications by observing the converter’s output transient response during
step loads. There should not be any appreciable ringing or oscillation. You may also
adjust the output trim slightly to compensate for voltage loss in any external filter
elements. Do not exceed maximum power ratings.
Please observe Sense inputs tolerance to avoid improper operation:
[Vout(+) −Vout(-)] − [Sense(+) −Sense(-)] ≤ 5% of Vout
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SDC_DSQ_DAQ_DCQ0150V2.A04.D02 Page 15 of 25
DSQ/DAQ/DCQ Series
600W Quarter Brick
DOSA Digital PMBus Interface
Output overvoltage protection is monitored at the output voltage pin, not the
Sense pin. Therefore excessive voltage differences between Vout and Sense
together with trim adjustment of the output can cause the overvoltage protection
circuit to activate and shut down the output.
Power derating of the converter is based on the combination of maximum
output current and the highest output voltage. Therefore the designer must ensure:
(Vout at pins) x (Iout) ≤ (Max. rated output power)
Trimming the Output Voltage (See Specification Note 7)
The Trim input pin is used to adjust the output voltage over the rated trim range
(please refer to the Specifications). As illustrated In the trim equations and circuit
diagrams below, trim adjustments use a single fixed resistor connected between
the Trim input and either Vout Sense pin. Trimming resistors should have a low
temperature coefficient (±100 ppm/deg.C or less) and be mounted close to
the converter keeping leads short. If the trim function is not used, leave the trim
unconnected, the converter will default to its specified output voltage accuracy.
Soldering Guidelines
CAUTION:
Murata Power Solutions recommends the specifications below when installing these converters. These specifications vary depending on the solder type.
Exceeding these specifications may cause damage to the product. Be cautious
when there is high atmospheric humidity. We strongly recommend a mild pre-bake
(100° C for 30 minutes). Your production environment may differ; therefore please
thoroughly review these guidelines with your process engineers.
1.
Avoid activating shutdown protection (OVP, OCP, OTP) by ensuring the
output voltage or output power is not exceeded when setting the output
voltage trim.
2.
Keep the trim external connections as short as possible to avoid
excessive noise that may otherwise cause instability or oscillation using
shielding if needed.
Wave Solder Operation for Through-Hole Mounted Products (THMT)
For Sn/Ag/Cu based solders:
Maximum Preheat Temperature
115
Maximum Pot Temperature
270
Maximum Solder Dwell Time
7 seconds
Trim Equations (based on 12V models¹)
[
Radj_up (in kΩ) = 5.11 x 12V x (1+∆) - 1 - 2
1.225 x ∆ ∆
where ∆ =
Vout -12V
12V
For Sn/Pb based solders:
Maximum Preheat Temperature
105
Maximum Pot Temperature
250
Maximum Solder Dwell Time
6 seconds
Radj_down (in kΩ) = 5.11 x
where ∆ =
280
230
180
Soaking Zone
(120 Sec max)
130
12V -Vout
12V
“12V”: substitute the appropriate output voltage for the specific model being
used: 2V, 3.3V, or 5V.
Reflow Zone
time above 217°C
45-75 sec
+VIN
