DSE/DAE/DCE Series
www.murata-ps.com
400W Eighth Brick
DOSA Digital PMBus Interface
PRODUCT OVERVIEW
DSE/DAE/DCE are DOSA compliant, highly efficient, digitally controlled Isolated DC-DC board mounted
power modules that provide a fully regulated DC output, packaged in a 1/8-brick format.
Graphical representation only, NTS, DSE
model shown
FEATURES
DOSA Compliant Digital Eighth-Brick with PMBus
interface
Wide 36-75Vin Range
95.5% Typical Efficiency
Delivers up to 33A (12V output, 400W)
Low Output Ripple & Noise
Wide Operating Temperature Range -40°C to +85°C
Optional Load Sharing (droop)
Baseplate included for improved thermal performance
Overtemperature/Current/Voltage Protection
Negative & Positive Logic (Negative Logic standard
configuration)
Basic insulation, 2250Vdc I/O Isolation compliant with
IEEE802.3 PoE Standards
Optional PMBus™1.2 digital communications
Certified to UL/IEC 62368-1, CAN/CSA-C22.2 No.
62368-1, safety approvals and EN55022/CISPR22
standards
This series incorporates advances in power conversion technology and offers optional features including
PMBus™ 1.2 compliant digital communications interface, output voltage sense and trim capability and
“droop” current sharing for deployment in systems requiring high current and or redundancy.
This series ideal for Power over Ethernet (PoE), server, storage, networking, telecommunications, fan trays,
wireless networks, wireless pre-amplifiers, MicroTCA , industrial and test equipment, and other applications requiring a highly reliable distributed power architecture.
ORDERING GUIDE [1]
Base Model
Included Options
Input
Range
Vin
(Vdc)
(Vdc, Nom.)
DSE0133V2 Sense & Trim, PMBus
DAE0133V2
Sense & Trim
DCE0133V2
48
36-75
Output
IOUT
Pout
(Vdc) (Adc) (W)
VOUT
12
33
396
Pinout Configuration
(Illustration Below)
Figure 1
Figure 2
Figure 3
[1] Contact Murata Power Solutions for latest availability of 3.3Vdc and 5.0Vdc models.
[2] Refer to order number configuration table for other available options.
[3] Please see Page 24 for the Product Status.
Figure 1
“DSE”
Figure 2
“DAE”
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
Figure 3
“DCE”
For full details go to
www.murata-ps.com/rohs
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DSE_DAE_DCE0133V2.A02.D12 Page 1 of 24
DSE/DAE/DCE Series
400W Eighth 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
Isolation Voltage
Input to output
2250
Vdc
On/Off Remote Control
Power on, referred to -Vin
0
13.5
Vdc
Output Power
0
436
W
Output Current
Current-limited, no damage, short-circuit protected
0
33
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 TA = +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)
Start-up threshold
Undervoltage shutdown
Internal Filter Type
External Input fuse
Input current
Full Load Conditions
Low Line input current
Inrush Transient
Short Circuit input current
No Load input current
Shut-Down input current (Off, UV, OT)
Back Ripple Current
48
34
31
Pi
20
75
36
34
Vin = nominal
Vin = minimum
Vin = 48V.
8.80
11.70
0.7
Vin = 48V,Iout =0, unit=ON
80
9.30
12.20
1
0.2
150
35
no filtering
1.5
(Default, configurable via PMBus)
(Default, configurable via PMBus)
36
32
28
Vdc
Vdc
Vdc
A
A
A
A2-Sec.
A
mA
mA
Ap-p
GENERAL AND SAFETY
Efficiency
Vin=48V, full load
Input to output
Input to Baseplate
Output to Baseplate
Isolation Voltage
94.5
2250
1500
1500
Insulation Safety Rating
Isolation Resistance
Isolation Capacitance
Safety
95.5
basic
10
1500
%
Vdc
Vdc
Vdc
MΩ
pF
Certified to UL/IEC-62368-1, CSA-C22.2 No.62368-1, IEC 60950-1, 2nd edition
Yes
Per Telcordia SR-332, Issue 3, Method 1, Case 1, Ground Fixed
4900
Hours x 103
200
NA
KHz
KHz
Calculated MTBF
DYNAMIC CHARACTERISTICS
Switching Frequency (Configurable via PMBus)
Fixed Frequency Control
Variable Frequency Control (Default)
Turn On Time (Configurable via PMBus)
Vin On to within 10% Vout steady
state
Remote On to within 10% Vout steady
state
Vout Rise Time (Default, Configurable via PMBus)
From 10%~90%
50-75-50%, 0.1A/us,within 1% of Vout (Vin=Vinnom, tested with a 1.0 μF ceramic,
Dynamic Load Response
10 μF tantalum and 330μF low ESR polymer
capacitor across the load.)
Dynamic Load Peak Deviation
Dynamic Load Response
50-75-50%, 1A/us,within 1% of Vout (Vin=Vinnom, tested with a 1.0 μF ceramic,
10 μF tantalum and 330μF low ESR polymer
Dynamic Load Peak Deviation
capacitor across the load.)
40
50
mS
8
mS
30
mS
200
300
µSec
±250
120
±350
200
mV
µSec
±500
±750
mV
0.1
13.5
0.8
0.2
V
V
mA
0.8
13.5
0.2
10
V
V
mA
%
FEATURES AND OPTIONS
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
3.5
0
-0.1
3.5
0.1
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DSE_DAE_DCE0133V2.A02.D12 Page 2 of 24
DSE/DAE/DCE Series
400W Eighth Brick
DOSA Digital PMBus Interface
OUTPUT
Conditions
Total Output Power
Voltage
Initial Output Voltage
Output Voltage
Output Adjust Range
Trim Down: Trim (pin #6) to -Vout
Sense (pin #5)
Trim Up: Trim (pin #6) to +Vout
Sense (pin #7)
Overvoltage Protection
Voltage Droop
Current
Output Current Range
Minimum Load
Current Limit Inception
Minimum
Typical/Nominal
Maximum
Units
0
396
436
W
12.03
Vdc
12
12.18
Vdc
13.2
Vdc
VIN = 48V Iout = 0A temp = 25C, both with/without "S" suffix
" VOUT_DROOP = 0mohm
All condtions"
Hardware TRIM
11.82
Rt down (kΩ) =5.11/((Vonom-Vo)/Vonom)-10.22
-20
Rt up(kΩ)= 5.11*Vonom*(1+Δ)/(1.225*Δ)-5.11/Δ-10.22
Δ=|(Vonom-Vo)/Vonom|
Configurable via PMBus
Default, configurable via PMBus
11.97
9.6
13.8
%
14.4
0
+10
%
15.6
Vdc
33
A
45
A
No minimum load
90% of Vnom., after warmup, Configurable via PMBus(Need check the OCP Inception of Vout is whether reasonable)
Short Circuit
Short Circuit condition, Input Current
Short Circuit Duration
(remove short for recovery)
Short circuit protection method
Regulation
Line Regulation
Load Regulation
Ripple and Noise
Temperature Coefficient
Output Capacitance
PMBus Monitoring Accurracy
VIN_READ
VOUT_READ
IOUT_READ
TEMP_READ
37
Hiccup technique, autorecovery within 1% of Vout
41
0.2
Output shorted to ground, no damage
Continuous
Hiccup current limiting
Non-latching
Vin = 36-75, Vout = nom., full load
"Iout = min. to max., Vin = nom.
|Vout@min_load-Vout@max_load| "
"(Vin=Vinnom and Io=Iomin to Iomax, tested with a 1.0 μF
ceramic, 10 μF tantalum and 330μF low ESR polymer
capacitor across the load.)"
36
mV
36
mV
300
mV pk-pk
47
10,000
% of
Vnom./°C
μF
-7
-2
-4
-5
7
2
4
5
%
%
A
°C
2.32 x 0.92 x 0.57
58.9 x 23.4 x 14.5
Inches
mm
Ounces
Grams
Inches
mm
At all outputs
Low ESR
A
0.01
0.02
MECHANICAL
Outline Dimensions
LxWxH
1.94
55.0
0.04 & 0.062
1.016 & 1.575
0.02
0.5
Copper alloy
98.4-299
4.7-19.6
Weight
Through Hole Pin Diameter
Digital Interface Pin Diameter
Through Hole Pin Material
TH Pin Plating Metal and Thickness
Nickel subplate
Gold overplate
µ-inches
µ-inches
ENVIRONMENTAL
RoHS rating
Operating Ambient Temperature Range
Operating Baseplate Temperature
Storage Temperature
Thermal Protection/Shutdown
(with “B” Suffix, default value)
Electromagnetic Interference Conducted,
EN55022/CISPR22
RoHS-6
With derating
Vin = Zero (no power)
-40
-40
-55
configurable via PMbus
External filter required;
see emissions performance test.
85
110
125
°C
°C
°C
125
°C
B
Class
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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DSE_DAE_DCE0133V2.A02.D12 Page 3 of 24
DSE/DAE/DCE Series
400W Eighth Brick
DOSA Digital PMBus Interface
TYPICAL PERFORMANCE DATA EFFICIENCY & TEMPERATURE DERATING
Figure 4. Temperature derating, power, transverse airflow Vin- to Vin+
36V Input, 10” X 10” test pcb
40
400
35
300
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
250
200
150
100
Output
Output
Power(W)
350
Load Current(Amps)
450
Figure 5. Temperature derating, current, transverse airflow Vin- to Vin+
36V Input, 10” X 10” test pcb
30
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
25
20
15
10
5
50
0
0
35
40
45
50
55
60
65
70
75
Ambient Temperature in Degrees Celsius
80
85
35
40
400
35
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
200
150
100
Output
Output
Power(W)
350
Load Current(Amps)
450
250
80
85
30
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
25
20
15
10
0
0
35
40
45
50
55
60
65
70
75
Ambient Temperature in Degrees Celsius
80
35
85
40
400
35
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
250
200
150
100
Output
350
Load Current(Amps)
450
300
40
45
50
55
60
65
70
75
Ambient Temperature in Degrees Celsius
80
85
Figure 9. Temperature derating, current, transverse airflow Vin- to Vin+
75V Input, 10” X 10” test pcb
Figure 8. Temperature derating, power, transverse airflow Vin- to Vin+
75V Input, 10” X 10” test pcb
Power(W)
50
55
60
65
70
75
Ambient Temperature in Degrees Celsius
5
50
Output
45
Figure 7. Temperature derating, current, transverse airflow Vin- to Vin+
48V Input, 10” X 10” test pcb
Figure 6 Temperature derating, power, transverse airflow Vin- to Vin+
48V Input, 10” X 10” test pcb
300
40
30
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
25
20
15
10
5
50
0
0
35
40
45
50
55
60
65
70
75
Ambient Temperature in Degrees Celsius
80
85
35
40
45
50
55
60
65
70
75
Ambient Temperature in Degrees Celsius
80
85
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DSE_DAE_DCE0133V2.A02.D12 Page 4 of 24
DSE/DAE/DCE Series
400W Eighth Brick
DOSA Digital PMBus Interface
TYPICAPERFORMANCE DATA EFFICIENCY & TEMPERATURE DERATING
Figure 11. Temperature derating, current, longitudinal airflow Vin to Vout
36V Input, 10” X 10” test pcb
40
400
35
350
30
300
Load Current(Amps)
450
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
250
200
150
Output
Output
Power(W)
Figure 10. Temperature derating, power, longitudinal airflow Vin to Vout
36V Input, 10” X 10” test pcb
100
20
15
10
5
50
0
0
35
40
45
50
55
60
65
70
75
Ambient Temperature in Degrees Celsius
80
35
85
Figure 12. Temperature derating, power, longitudinal airflow Vin to Vout
48V Input, 10” X 10” test pcb
450
40
400
35
Load Current(Amps)
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
250
200
150
Output
Power(W)
Output
300
100
45
50
55
60
65
70
75
Ambient Temperature in Degrees Celsius
80
85
30
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
25
20
15
10
5
50
0
0
35
40
45
50
55
60
65
70
75
Ambient Temperature in Degrees Celsius
80
85
35
40
400
35
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
250
200
150
100
Output
350
Load Current(Amps)
450
300
40
45
50
55
60
65
70
75
Ambient Temperature in Degrees Celsius
80
85
Figure 15. Temperature derating, current, longitudinal airflow Vin to Vout
75V Input, 10” X 10” test pcb
Figure 14. Temperature derating, power, longitudinal airflow Vin to Vout
75V Input, 10” X 10” test pcb
Power(W)
40
Figure 13. Temperature derating, current, longitudinal airflow Vin to Vout
48V Input, 10” X 10” test pcb
350
Output
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
25
30
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
25
20
15
10
5
50
0
0
35
40
45
50
55
60
65
70
75
Ambient Temperature in Degrees Celsius
80
85
35
40
45
50
55
60
65
70
75
Ambient Temperature in Degrees Celsius
80
85
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DSE_DAE_DCE0133V2.A02.D12 Page 5 of 24
DSE/DAE/DCE Series
400W Eighth Brick
DOSA Digital PMBus Interface
PERFORMANCE DATA RIPPLE/NOISE & TIMING
Figure 16. Ripple/Noise @+25°C
(Vin=48V, Iout=0A, Cload=330μF, Scope BW=20MHz, 2μS/div, 20mV/div)
Figure 17. Ripple/Noise @+25°C
(Vin=48V, Iout=33A, Cload=330μF, Scope BW=20MHz, 2μS/div, 20mV/div)
Figure 18. Enable Start-up Delay (CH2: Vout, CH4: On/Off)
(Vin=48V, Iload=0A, Cload=5500μF, Ta=+25°C, 10mS/div)
Figure 19. Enable Start-up Delay (CH2: Vout, CH4: On/Off)
(Vin=48V, Iload=33A, Cload=5500μF, Ta=+25°C, 10mS/div)
Figure 20. Vin Start-up Delay (CH2: Vout, CH1: Vin)
(Vin=48V, Iload=0A, Cload=5500μF, Ta=+25°C, 20mS/div)
Figure 21. Vin Start-up Delay (CH2: Vout, CH1: Vin)
(Vin=48V, Iload=33A, Cload=5500μF, Ta=+25°C, 20mS/div)
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DSE_DAE_DCE0133V2.A02.D12 Page 6 of 24
DSE/DAE/DCE Series
400W Eighth Brick
DOSA Digital PMBus Interface
PERFORMANCE DATA
Figure 22. Output Pre-bias start-up
Vin=48V, Iout = 0A, Cload = 47μF, Ta = 25°C, Pre-bias Voltage = 6V
Figure 24. Output Pre-bias start-up
Vin=48V, Iout = 0A, Cload = 47μF, Ta = 25°C, Pre-bias Voltage = 9.6V
Figure 23. Output Pre-bias start-up
Vin=48V, Iout = 0A, Cload = 10000μF, Ta = 25°C, Pre-bias Voltage = 6V
Figure 25 Output Pre-bias start-up
Vin=48V, Iout = 0A, Cload = 10000μF, Ta = 25°C, Pre-bias Voltage = 9.6V
Figure 27. Max. Baseplate temperature Current
Derating Vin 48V, tested on 10” x 10” PCB
Figure 26. Efficiency and Power Dissipation
35
Output load Current (Amps)
30
25
20
15
10
5
0
25
35
45
55
65
75
85
95
105
115
125
135
Baseplate Temperature in Degrees Celsius
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DSE_DAE_DCE0133V2.A02.D12 Page 7 of 24
DSE/DAE/DCE Series
400W Eighth Brick
DOSA Digital PMBus Interface
TOP VIEW
[15.24]
0.600
[22.9]
0.90
MECHANICAL SPECIFICATIONS (With Baseplate, “B” models)
M3 TRU TYP 4PL
[0.25]
0.01 Min
[5.59]
0.22
SIDE VIEW
[14.0]
0.55 Nominal
[50.80]
2.00
[58.40]
2.30
L
[1.93]
0.076
[50.80]
2.00
[2.50]
0.098
MFG PLANE
[2.54]
0.10
[7.62]
CL 0.300
BOTTOM VIEW
[15.24]
0.600
3
4
5
2
6
7
1
8
9
10
11
12
13
14
15
[2]
0.079
[7.62]
0.300
[12]
0.472
[15.24]
0.600
SEE NOTE 4,5
Pin Material
Pin No.1-3:5-7 Dia 0.04”,Copper Alloy
Pin No. 4,8: Dia 0.06”, Copper Alloy
Pin No. 9-15: Square 0.02” x 0.02”, Copper Alloy
Finish: (All Pins)
Gold (5μ”Min) Over Nickel (100μ”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 (4.57mm).
[5] OTHER PIN LENGTH OPTIONS: 1 = 0.110”(2.79mm), 2 = 0.145”(3.68mm), 3 = 0.220”(5.58mm).
[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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DSE_DAE_DCE0133V2.A02.D12 Page 8 of 24
DSE/DAE/DCE Series
400W Eighth Brick
DOSA Digital PMBus Interface
1
8
7
6
5
4
2
3
INPUT/OUTPUT CONNECTIONS
PIN
Name
Input/Output
1
Vin+
Output
15
14
13
12
11
10
9
Function
Converter’s Input Voltage positive conneciton
DSE
•
DAE
•
DCE
•
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
•
•
•
•
•
•
2
On/Off
Input
3
4
VinVout-
Output
Output
5
Sense-
Input
Sense inputs to compensate output voltage inaccuracy delivered at the load, refer to technical notes section
“Remote Sense Input” for detail description
•
•
6
Trim
Input
Output voltage can be trimed up or down by external connection of a resistor with respec toTrim output voltage by connecting resistor between trim pin and 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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DSE_DAE_DCE0133V2.A02.D12 Page 9 of 24
DSE/DAE/DCE Series
400W Eighth Brick
DOSA Digital PMBus Interface
SHIPPING TRAYS AND BOXES, THROUGH-HOLE MOUNT
SHIPPING TRAY
BASE (PAD) 75" THICK
SHIPPING TRAY
1/8 BRICK (21 CAVITY)
SHIPPING TRAY
1/8 BRICK (21 CAVITY)
ESD TAPE
3/4" WIDE
LABEL
1.0" X 1.5" PAPER
11.25
REF
10.50
REF
SHIPPING TRAY
1/8 BRICK (21 CAVITY)
LABEL
PAPER, 2.0" X 4.0"
LABEL
PRE-PRINTED ESD ATTENTION
SHIPPING BOX
10" X 10" X 2.50"
2.75
REF
9.920
+0.00
-0.62
0.910 TYP
A
0.455 TYP
0.25 CHAMFER TYP 4PL
0.945
0.570
7"
2.400 TYP
+0.00
-0.62
9.920
0.5
0.625 TYP
50
0.2
th
Dep
0.380
0.735
SHIPPING TRAY DIMENSIONS
A
7.800
YP
T
.25
R0
1.300 TYP
1.06
Notes:
[1] THIS DOCUMENT DEFINES THE GENERAL PACKING RULES FOR APPLICABLE SHIPPING KIT.
INFORMATION FOR SEALING AND MARKING IS NOT PART OF THIS DOCUMENT.
[2] REFER TO SHIPPING KIT BOM DETAILS.
[3] INSERT UNITS INTO FOAM POCKETS IN TRAYS APPROX AS SHOWN
[4] EACH FOAM TRAY CONTAINS 21 UNITS. IN FULL MPQ QUANTITIES, TWO TRAYS EQUAL A TOTAL OF 42 (2x21) UNITS PER BOX.
[5] FRONT FLAP SHALL BE SEALED WITH ESD TAPE SPECIFIED OR EQUIVALENT AFTER THE BOX IS CLOSED.
[6] MANUFACTURER TO APPLY LABEL ON 'SHORT' SIDE PANEL TOWARDS THE BACK AS SHOWN.
[7] APPLY ESD LABEL OVER TAPE USED TO SEAL BOX AND APPLY IDENTIFICATION LABEL APPROX AS SHOWN.
[8] PAD MAY, AT MFR'S OPTION, BE EXCHANGED FOR THINNER PAD IF FOAM STACKUP EXCEEDS CARTON HEIGHT BY >1/8" OR
ADDITIONAL PAD MAY BE ADDED IF STACKUP IS BELOW INSIDE CARTON HEIGHT BY >1/8"
SECTION A-A
SCALE 1 : 3
Dimensions are in inch.
Third Angle Projection
Tolerances (unless otherwise specified):
.XX ± 0.032 (0.5)
.XXX ± 0.015 (0.25)
Angles ± 1˚
Components are shown for reference only.
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DSE_DAE_DCE0133V2.A02.D12 Page 10 of 24
DSE/DAE/DCE Series
400W Eighth Brick
DOSA Digital PMBus Interface
TECHNICAL & APPLICATIONS OVERVIEW
Power Management Overview and PMBus Interface (DSE 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 (DSE 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#t 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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DSE_DAE_DCE0133V2.A02.D12 Page 11 of 24
DSE/DAE/DCE Series
400W Eighth 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 additonal details
Start-Up Time
urn-onTime (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
+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 additonal configuration details
Recommended Input Filtering
C1
Recommended Output Filtering
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.
Input Ripple Current and Output Noise
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.
C2
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.
Current
Probe
Lbus
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.
Thermal Shutdown (OTP)
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.
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.
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
forced airflow measured in Linear Feet per Minute (“LFM”). Note that these are
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DSE_DAE_DCE0133V2.A02.D12 Page 12 of 24
DSE/DAE/DCE Series
400W Eighth Brick
DOSA Digital PMBus Interface
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 DSE 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 ignor the control pin and therefore
requires the On/Off control pin to be asserted to start the unit.
On/Off 2 can be configured by PMBUS command ON_OFF_CONFIG (02h);
default configuration is ignored; treat it as always ON.
On/Off status is dependent on On/Off 1 control, On/Off 2 control, and OPERATION (PMBus command) status; all three must be ON to turn DSE 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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DSE_DAE_DCE0133V2.A02.D12 Page 13 of 24
DSE/DAE/DCE Series
400W Eighth 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 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
