The Bel SRPE-30E1A0 is part of the non-isolated DC-DC converter
power module series. The module uses a vertical SMT package. This
converter is available in a range of output voltages from 0.6 VDC to 2.0
VDC over a wide range of input voltage (Vin = 4.5 – 13.2 VDC).
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
4.5 – 13.2 VDC Input
0.6 – 2.0 VDC / 30 A Output
Non-Isolated
Wide Output Trim Range
Fixed Frequency
Output Over-Voltage Shutdown
High Efficiency
OCP/SCP
High Power Density
Power Good Signal
Overtemperature Shutdown
Remote Sense
Wide Input Voltage Range
Remote On/Off
Low Cost
Under-Voltage Lockout
Wide Operating Temperature Range (0 C - 50 C)
Class II, Category 2, Non-Isolated DC/DC Converter
(refer to IPC-9592B)
•
•
•
Networking
Computers and Peripherals
Telecommunications
SRPE-30E1A0
2
MODEL NUMBER
SRPE-30E1A0G
SRPE-30E1A0R
OUTPUT
VOLTAGE
INPUT VOLTAGE
MAX. OUTPUT
CURRENT
MAX. OUTPUT
POWER
TYPICAL
EFFICIENCY
0.6 – 2.0 VDC
4.5 - 13.2 VDC
30 A
60 W
91.5%
S
R
PE
Mounting Type
RoHS
Status
Series
Name
Surface Mount
RoHS
-
SMD SIP
PARAMETER
30
Output
Current
30 A
E
Input Range
1A
0
Output Voltage
Active
Logic
4.5 - 13.2 V
DESCRIPTION
0.6 - 2.0 V
Active High
x
Package
G – Tray Package
R – Tape and Reel
Package
MIN
TYP
MAX
UNITS
Continuous non-operating Input Voltage
-0.3
-
15
V
Output Enable Terminal Voltage
-0.3
-
15
V
Ambient Temperature
0
-
50
C
Storage Temperature
-40
-
125
C
-
-
2000
m
Altitude
NOTE: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may permanently damage the device.
PARAMETER
DESCRIPTION
MIN
TYP
MAX
4.5
12
13.2
V
-
-
15.0
A
All Vin, Vout = 0.6 V, at Ta = 25˚C.
-
20
35
All Vin, Vout = 1.2 V, at Ta = 25˚C.
-
35
50
All Vin, Vout = 2.0 V, at Ta = 25˚C.
-
45
70
-
100
150
mA
-
-
30
mA
-
-
100
mA
3.8
4.3
5
V
Input Voltage
Input Current (full load)
Input Current (no load)
Remote Off Input Current
Input Reflected Ripple Current (rms)
Input Reflected Ripple Current (pk-pk)
Turn-on Voltage Threshold
Vout = 2.0 V, Iout = 30 A. With simulated source
impedance of 1 µH, 5 Hz to 20 MHz. Use
100 µF/100 V electrolytic capacitors with ESR <
0.2 ohm max @ 25˚C.
Ta = 20 - 50˚C
The turn on voltage should not be less than 7 V
when Ta = 0 - 20˚C.
Turn-off Voltage Threshold
UNIT
mA
7
8
9
V
3.8
4.1
4.5
V
NOTE: All specifications are typical at 25 C unless otherwise stated
tech.support@psbel.com
SRPE-30E1A0
3
PARAMETER
TYP
MAX
Setpoint test condition: Vin = 12 V, Iout = half load,
Ta = 25°C
-2
-
2
-3
-
3
Load Regulation
Vin = 38 – 55 V, Io = 100% load
-
25
40
mV
Line Regulation
Vin = 42/50 V, Io = 0~100% load
(The output droop voltage from no load to full load
is about 0.6 V).
-
0.6
0.65
V
-2
-
2
%Vo,set
-2
-
2
%Vo,set
Output Voltage
Set Point
DESCRIPTION
Vo,set ≥ 0.9 VDC
Vo,set < 0.9 VDC
MIN
Regulation Over Temperature
Condition: Vin = 12 V, lout = full load, Ta = 25°C;
measured with a 10 µF+7*100 µF ceramic cap and
3*470 µF POSCAP ESR ≤ 12 m ohm at output.
Output Ripple and Noise (pk-pk)
UNIT
%Vo,set
-
±3
-
%Vo,set
Output Current Range
-
-
30
mV
Output DC Current Limit
-
-
5
mV
Turn On Time
-
-
5
ms
-
0
5
%
470
-
9000
µF
-
40
60
mV
-
20
50
µs
-
40
60
mV
-
20
50
µs
Output Ripple and Noise (rms)
Overshoot at Turn On
.
Output Capacitance
TRANSIENT RESPONSE
△V 50% ~
75% of Max
Load
Overshoot
△V 75% ~ 50%
of Max Load
Overshoot
Settling Time
Vin = 12 V, Vout = 2.0 V, di/dt = 2.5 A/µs.
Measured with a 10 uF+7*100 µF ceramic cap and
3*470 µF POSCAP ESR ≤ 12m ohm at output.
Settling Time
NOTE: All specifications are typical, at 25°C unless otherwise stated.
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BCD.20135_AP
SRPE-30E1A0
4
PARAMETER
DESCRIPTION
Efficiency
MIN
79
80
-
86
87.7
-
Vo = 2.0 V, TA = 25˚C
90
91.5
-
-
500
-
kHz
-
125
-
C
0.6
-
2
V
-
10.4
-
g
-
71.7
-
Mhrs
13.9
-
This voltage is achieved by trimming up output slowly.
Calculated Per Telcordia SR-332, Issue 3 (Vin = 12 V,
Vo = 0.9 V, Io = 30 A, T a= 40˚C，with 300 LFM,
FIT = 109/MTBF)
FIT
UNIT
Vo = 1.2 V, TA = 25˚C
Weight
MTBF
MAX
Vo = 0.6 V, TA = 25˚C
Switching Frequency
Over Temperature
Protection
Output Voltage Trim
Range (Wide Trim)
TYP
-
%
-
1.20 x 0.59 x 0.65
inch
30.48 x 15.00 x 16.51
mm
Dimensions (L × W × H)
NOTE: All specifications are typical, at 25°C unless otherwise stated.
PARAMETER
DESCRIPTION
Signal Low (Unit Off)
Remote On/Off pin open, unit off.
Signal High (Unit On)
MIN
TYP
MAX
UNIT
0
-
1.5
V
1.8
-
15
V
Vout = 0.6V
95.0%
efficiency
90.0%
4.5Vin
85.0%
12Vin
80.0%
13.2Vin
75.0%
70.0%
0.0 1.5 3.0 6.00 9.00 12.00 15.0 18.0 21.0 24.0 27.0 30.0
output current
Figure 1. Efficiency @ Vo = 0.6 V
tech.support@psbel.com
SRPE-30E1A0
5
Vout = 1.2V
95.0%
efficiency
90.0%
4.5Vin
85.0%
12Vin
80.0%
13.2Vin
75.0%
70.0%
0.0 1.5 3.0 6.00 9.00 12.00 15.0 18.0 21.0 24.0 27.0 30.0
output current
Figure 2. Efficiency @ Vo = 1.2 V
Vout = 2V
100.0%
efficiency
95.0%
90.0%
4.5Vin
85.0%
12Vin
80.0%
13.2Vin
75.0%
70.0%
0.0 1.5 3.0 6.00 9.00 12.00 15.0 18.0 21.0 24.0 27.0 30.0
output current
Figure 3. Efficiency @ Vo = 2.0 V
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BCD.20135_AP
SRPE-30E1A0
6
Input Reflected Ripple Current
Testing setup
Ls
is
ic
Vin+
+
+
Cs
Cin
VinFigure 4. Test setup
Notes and values in testing:
is: Input Reflected Ripple Current
ic: Input Terminal Ripple Current
Ls: Simulated Source Impedance (1 μH)
Cs: Offset possible source Impedance (100 μF, ESR < 0.2 Ω @ 100 kHz, 20˚C)
Cin: Electrolytic capacitor, should be as close as possible to the power module to damp ic ripple current and enhance
stability. Recommendation: 100 μF, ESR < 0.2 Ω @ 100 kHz, 20˚C.
Below measured waveforms are based on above simulated and recommended inductance and capacitance.
Figure 5. is (input terminal ripple current), AC component
Figure 6. ic (input terminal ripple current), AC component
NOTE: Vin = 12 V, Vo = 2 V, Io = 30 A, with 1*10 µF ceramic and 1*470 µF polymer capacitor at the output, Ta = 25˚C.
tech.support@psbel.com
SRPE-30E1A0
7
Airflow direction, hot spot location and allowed maximum temperature:
Airflow Direction
Figure 7. Airflow direction, Hot spot location and allowed maximum temperature
Figure 8. Vin = 12 V, .06 V ≤ Vo ＜ 1.2 V
Figure 9. Vin = 12 V, 1.2 V ≤ Vo ＜ 2 V
Figure 10. Vin = 12V, Vo = 2 V
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BCD.20135_AP
SRPE-30E1A0
8
Figure 11. Ripple and noise at full load, 12 VDC input
0.6 VDC / 30 A output and Ta = 25˚C
Figure 12. Ripple and noise at full load, 12 VDC input
0.9 VDC / 30 A output and Ta = 25˚C
Figure 13. Ripple and noise at full load, 12 VDC input
2.0 VDC / 30 A output and Ta = 25˚C
NOTE: Test condition of the output ripple and noise:
0-20 MHz BW, with a 10 µF+7*100 µF ceramic cap and 3*470 µF POSCAP ESR ≤ 12 m ohm at output.
tech.support@psbel.com
SRPE-30E1A0
9
Figure 14. Vin = 50%-75% Load Transient at Vin = 12 VDC
Vout = 0.6 VDC @ Ta = 25˚C
Figure 15. Vin = 75% - 50% Load Transient at Vin = 12 VDC
Vout = 0.6 VDC @ Ta = 25˚C
Figure 16. Vin = 50%-75% Load Transient at Vin = 12 VDC
Vout = 0.9 VDC @ Ta = 25˚C
Figure 17. Vin = 75% - 50% Load Transient at Vin = 12 VDC
Vout = 0.9 VDC @ Ta = 25˚C
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BCD.20135_AP
SRPE-30E1A0
10
Figure 18. Vin = 50% - 75% Load Transient at Vin = 12 VDC
Vout = 2.0 VDC @ Ta = 25˚C
Figure 19. Vin = 75% - 50% Load Transient at Vin = 12 VDC
Vout = 2.0 VDC @ Ta = 25˚C
NOTE: Test condition of the Transient response:
di/dt = 2.5 A/µs, with a 10 µF+7*100 µF ceramic cap and 3*470 µF POSCAP ESR ≤ 12 m ohm at output.
Input Current
Under-voltage Lockout
V1 = 4.1 V
Voltage Falling
V2 = 4.3 V
Voltage Rising
V1
V2
Input Voltage (V)
Figure 20. Input under-voltage lockout
tech.support@psbel.com
SRPE-30E1A0
11
RISE TIME
Figure 21. Rise time at full load, 12 VDC input
0.6 VDC / 30 A output and Ta = 25˚C
Figure 22. Rise time at full load, 12 VDC input
0.9 VDC / 30 A output and Ta = 25˚C
Figure 23. Rise time at full load, 12 VDC input
2.0 VDC / 30 A output and Ta = 25˚C
NOTE: Test condition of the Rise time:
di/dt = 2.5 A/µs, with a 10 µF+7*100 µF ceramic cap and 3*470 µF POSCAP ESR ≤ 12 m ohm at output.
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Europe, Middle East
+353 61 49 8941
North America
+1 866 513 2839
© 2021 Bel Power Solutions & Protection
BCD.20135_AP
SRPE-30E1A0
12
STARTUP TIME
Startup from remote on/off
Ch1: Vo
Ch3: remote on/off
Test Condition:
With a 10 µF+7*100 µF ceramic cap and 3*470 µF POSCAP ESR ≤ 12 m ohm at output.
Figure 24. Startup time at full load, 12 VDC input
0.6 VDC / 30 A output and Ta = 25˚C
Figure 25. Startup time at full load, 12 VDC input
0.9 VDC / 30 A output and Ta = 25˚C
Figure 26. Startup time at full load, 12 VDC input
2.0 VDC / 30 A output and Ta = 25˚C
tech.support@psbel.com
SRPE-30E1A0
13
Output Voltage Set-Point Adjustment
Maximum trim up voltage is 2 V.
Minimum trim up voltage is 0.6 V.
Trim up circuit (using an external resistor)
Equations for calculating the trim resistor are shown below.
The Trim Up resistor should be connected between the Trim pin and the GND.
SRP1-30E1A0 Trim up Resistor Calculate Unit: kΩ
Trim resistor value,Rtrim_up(KOhm)
Vo is the desired output voltage.
Rtrimup is the required resistance between TRIM and GND.
10
5
1
1.5
2
Adjusted output voltage Vo,adj(V)
Figure 27. Trim up circuit (using an external resistor)
Figure 28. Trim up curve
Trim up circuit (using external PWM signal)
Equations for calculating the duty cycle are shown below.
Figure 29. Trim up circuit (using external PWM signal)
SRP1-30E1A0 Trim up duty cycle Calculate
Figure 30. External PWM signal duty cycle
Unit: %
Vo(D) = 2.72 − 0.0234 D
Vo is the desired output voltage.
D is the external PWM signal duty cycle.
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BCD.20135_AP
SRPE-30E1A0
14
To provide protection in a fault output overload condition, the module is equipped with internal current-limiting circuitry and can
endure current limiting for a few milliseconds. If the overcurrent condition persists beyond a few milliseconds, the module will shut
down into hiccup mode and restart once every 40 ms. The module operates normally when the output current goes into specified
range. The typical average output current is 4 A during hiccup.
Figure 31. Output current @ SCP, Vin = 12 V
Vout = 0.6 V, Ta = 25˚C
Figure 32. Output current @ SCP, Vin = 12 V
Vout = 0.9 V, Ta = 25˚C
Figure 33. Output current @ SCP, Vin = 12 V
Vout = 1.5 V, Ta = 25˚C
Figure 34. Output current @ SCP, Vin = 12 V
Vout = 2.0 V, Ta = 25˚C
NOTE: Test condition of the SCP:
With a 10 µF ceramic cap and a 470 µF POSCAP ESR ≤ 12mohm at output.
tech.support@psbel.com
SRPE-30E1A0
15
1. This module has a power good indicator output. Power good pin used positive logic and is open collector.
2. The maximum voltage pulled up externally on Power Good pin should not exceed 7V.
3. If the output voltage becomes within +10% and –5% of the target value, internal comparators detect power-good state and the
power-good signal becomes high after a 1ms internal delay.
4. If the output voltage goes outside of +15% or –10% of the target value, the power-good signal becomes low after two microsecond
(2-μs) internal delay.
5. The pull up resistance must be larger than 10 kΩ.
Figure 35. Typical Start-up using Remote on/off,
Vin = 12 V, Vo = 2 V, Io = 0 A
CH1: Vout; CH2: PG
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BCD.20135_AP
SRPE-30E1A0
16
The SRPE-30E1A0 modules are designed to be compatible with reflow soldering process. The suggested Pb-free solder paste is
Sn/Ag/Cu(SAC). The recommended reflow profile using Sn/Ag/Cu solder is shown in the following. Recommended reflow peak
temperature is 245C while the part can withstand peak temperature of 260C maximum for 10 seconds. This profile should be used
only as a guideline. Many other factors influence the success of SMT reflow soldering. Since your production environment may differ,
please thoroughly review these guidelines with your process engineers.
Figure 36. Soldering information
The SRPE-30E1A0 modules have a MSL rating of 3.
The SRPE-30E1A0 modules are designed to be compatible with J-STD-033 Rev: A (Handling, Packing, Shipping and Use of Moisture
/Reflow Sensitive surface Mount devices). Moisture barrier bags (MBB) with desiccant are applied. The recommended storage
environment and handling procedure is detailed in J-STD-033.
This component has been designed, handled, and packaged ready for Pb-free reflow soldering. If the assembly shop follows J-STD033 guidelines, no pre-bake of this component is required before being reflowed to a PCB. However, if the J-STD-033 guidelines are
not followed by the assembler, Bel recommends that the modules should be pre-baked @ 120~125C for a minimum of 4 hours
(preferably 24 hours) before reflow soldering.
tech.support@psbel.com
SRPE-30E1A0
17
Figure 37. Outline
NOTE: 1) All Pins: Material - Copper Alloy;
Finish – 3 micro inches minimum Gold over 50 micro inches minimum Nickel plate
2) Un-dimensioned components are shown for visual reference only.
3) All dimensions in inch [mm]; Tolerances: x.xx +/-0.02 inch [0.51 mm]; x.xxx +/-0.010 inch [0.25 mm].
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SRPE-30E1A0
18
Figure 38. Pins
PIN
FUNCTION
PIN
1
Vout
7
FUNCTION
Trim
2
Vout
8
PGOOD
3
Vout
9
Vsense+
4
GND
10
Vsense-
5
GND
11
GND
6
Enable
12
Vin
Figure 39. Recommended pad layout
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SRPE-30E1A0
19
DATE
REVISION
2013-08-19
PA
CHANGES DETAIL
First release
APPROVAL
J.Yan
2013-10-10
PB
Update mechanical drawing
J.Yan
2014-01-10
PC
Update input / output spec, efficiency and remote on/off.
J.Yan
2014-04-14
PD
Update Output Specs, General, Efficiency Data, NR, TR, Startup & Shutdown, OCP
J.Yan
2014-07-03
PE
Update part number explanation, RoHS compliance，Add MD Note.
J.Yan
2014-07-11
PF
Update Cover, MD
J.Yan
2014-07-29
G
Added assembly guide drawing
J.Yan
2014-12-18
H
J.Yan
2015-07-07
I
2015-11-16
J
2016-01-05
K
Added trim resistor equation
Input specs: 1. Change no load input current. 2.Change remoted off input current to
15mA. 3. Change input reflected ripple current (RMS) from 20mA to 30mA. 4. Update
turn on voltage threshold: min value 3.8V, typical value 4.3V, max value 5V. 5. Update turn
off voltage threshold: min value 3.8V, typical value 4.1V, max value 4.5V.
Output specs: 1. Change output voltage set point max to 10%Vo. 2. Change the load/line
regulation range as ±5%Vo. 3. Change output ripple and noise max value to 30mV. 4.
Update transient response.
General: 1. Update the efficiency. Including efficiency data and graphs. 2. Update the
weight of module. Update the TD. Add the input noise. Add the PG signal section.
Update mechanical drawing, change the thickness of module to 0.591 inch, change the
thickness of heatsink to 0.47 inch.
Output specs:
Shrink the output voltage set point, line regulation, load regulation rang. Update the
waveform of ripple and noise/transient response/Startup&Shutdown; add tilt dimension
in mechanical drawing, update recommended pad layout.
Output specs: Shrink the output voltage set point, line regulation, load regulation range.
2016-01-22
L
Update MTBF FIT
J.Yan
2016-02-02
M
Input specs: Update the turn on voltage information
J.Yan
2016-05-17
N
Input specs: Update the turn on voltage information
2021-06-30
AP
Add object ID. Add thermal test airflow direction.
J.Yan
J.Yan
J.Yan
J.Yan
XF.Jiang
NUCLEAR AND MEDICAL APPLICATIONS - Products are not designed or intended for use as critical components in life support systems,
equipment used in hazardous environments, or nuclear control systems.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on
the date manufactured. Specifications are subject to change without notice.
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