SRSB-80T12C [BEL]
Secondary Side Control for Fast Transient Response and High Reliability;
| 型号： | SRSB-80T12C |
| 厂家： | 
BEL FUSE INC. |
| 描述： | Secondary Side Control for Fast Transient Response and High Reliability |
| 文件： | 总16页 (文件大小：907K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
The SRSB-80T12C is an isolated DC-DC converter that operates from
a nominal 48 VDC source. This secondary side control unit will provide
up to 100 W of output power from a nominal 48 VDC input.
Features include start-up into pre-biased load, remote on/off, over
current protection and under voltage lockout. This converter is
provided in an industry standard sixteenth brick package.
48 VDC Input
12 VDC / 8.3 A Output
1/16th Brick Converter
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•
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Isolated
Input Under-Voltage Lockout
Fixed Frequency (400 kHz)
Start-up into Pre-biased Load
High Efficiency
OCP/SCP
High Power Density
Over Temperature Protection
Low Cost
Remote On/Off
Basic Insulation
Output Over-Voltage Protection with Auto-Recovery
Secondary Side Control for Fast Transient Response and High Reliability
Approved to UL/CSA 62368-1
Approved to IEC/EN 62368-1
Class II, Category 2, Isolated DC/DC Converter
(refer to IPC-9592B)
Networking
Computers and Peripherals
Telecommunications
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2
SRSB-80T12C
MAX. OUTPUT
CURRENT
MAX. OUTPUT
POWER
TYPICAL
EFFICIENCY
MODEL NUMBER
OUTPUT VOLTAGE
INPUT VOLTAGE
SRSB-80T12CG
SRSB-80T12CR
12 VDC
45 – 55 VDC
8.3 A
100 W
93%
S
R
SB
-
80
T
12
C
x
RoHS
Status
Output
Power
Input
Range
Output
Voltage
Mounting Type
Series Name
Active Logic
Package Type
G – Tray Package
Active Low, with
HSK and Fins
45 – 55 V
12 V
Surface Mount
RoHS
1/16th Brick
100 W
R – Tape and Reel
Package
PARAMETER
DESCRIPTION
MIN
TYP
MAX
UNITS
Continuous non-operating Input Voltage
Input Transient Voltage
I/O Isolation Voltage
-0.3
-
-
-
-
-
-
-
80
100
1500
70
V
V
100 ms maximum
-
V
Ambient Temperature
Storage Temperature
Altitude
-40
-55
-
C
C
m
125
3000
Ta = 45C
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
48
-
MAX
55
UNIT
V
45
-
Operating Input Voltage
Input Current (full load)
Input Current (no load)
Remote Off Input Current
3.5
70
A
-
40
2
mA
mA
-
5
Input Reflected Ripple Current
(pk-pk)
Detail conditions please refer to input reflected
ripple current section.
-
-
20
mA
I2t Inrush Current Transient
Turn-on Voltage Threshold
Turn-off Voltage Threshold
Over-voltage Shutdown Threshold
Lockout Hysteresis Voltage
-
-
-
-
1
45
43
64
-
A2s
V
41
39
61
2
V
V
-
V
CAUTION: This converter is not internally fused. An input line fuse must be used in application.
Recommend a fast-acting fuse with maximum rating of 5A on system board. Refer to the fuse manufacture’s datasheet for further
information.
NOTE: This converter has internal L-C (0.47 µF - 0.33 µH - 2.35 µF) filter.
tech.support@psbel.com
3
SRSB-80T12C
PARAMETER
DESCRIPTION
Vin = 48 V, Io = 50% load
MIN
TYP
12.00
±12
±12
±60
100
30
MAX
12.24
±24
±24
±100
-
UNIT
V
Output Voltage Set Point
Load Regulation
11.76
-
-
mV
mV
mV
mV
mV
A
Line Regulation
Regulation Over Temperature
Output Ripple and Noise (pk-pk)
Output Ripple and Noise (rms)
Output Current Range
-
-
0 – 20 MHz BW, with a 1 µF ceramic and a 10 µF
Tan capacitor at output.
-
-
0
9.2
-
-
8.3
Output DC Current Limit
Short Circuit Surge Transient
Rise Time (from ON/OFF or Vin)
10.4
-
11.6
3
A
A2s
ms
From 10% to 90% of Vo
-
25
28
Enable from Vin. Delay time from Vin to 10% of Vo
-
27
32
Turn on Delay Time
ms
Enable from ON/OFF. Delay time from ON/OFF to 10%
of Vo
-
27
32
Overshoot at Turn on
Output Capacitance
TRANSIENT RESPONSE
△V 50% ~ 75% of Max Load
Setting Time
-
0
-
3
%
Typically the ceramic capacitance is lower than 600 µF
0
3300
µF
-
-
-
-
150
50
250
100
250
100
mV
µs
di/dt = 0.1 A/µs, Vin = 48 VDC, Ta = 25°C
Load capacitor = 10 µF tantalum + 1 µF ceramic
△V 75% ~ 50% of Max Load
Setting Time
150
50
mV
µs
NOTE: All specifications are typical at nominal input, full load at 25°C unless otherwise stated.
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Europe, Middle East
North America
+86 755 298 85888
+353 61 49 8941
+1 866 513 2839
© 2021 Bel Power Solutions & Protection
BCD.20138_AJ
4
SRSB-80T12C
PARAMETER
DESCRIPTION
MIN
TYP
93
MAX
UNIT
%
91
-
-
-
-
-
-
-
-
Efficiency
Switching Frequency
400
125
14
kHz
C
Over Temperature Protection
-
Output Voltage Protection (Static)
This voltage is achieved by trimming up output slowly.
-
V
Weight
MTBF
FIT
-
15.5
5.28
189
g
Calculated Per Telcordia SR-332, Issue 2
(Vin = 48 V, Vo = 12 V, Io = 8.3 A, Ta = 25˚C, 100 LFM,
FIT = 109/MTBF)
-
Mhrs
-
-
1.30 x 0.90 x 0.453
33.02 x 22.86 x 11.50
inch
mm
Dimensions (L × W ×H)
ISOLATION CHARACTERISTICS
Input to Output
-
10M
-
-
-
1500
V
Isolation Resistance
-
-
Ohm
pF
Isolation Capacitance
1000
95.00%
93.00%
91.00%
89.00%
87.00%
85.00%
83.00%
81.00%
79.00%
77.00%
75.00%
45 V
48 V
55 V
0.8A
2A
4A
6A
8.3A
OUTPUT CURRENT(A)
Figure 1. Efficiency data
tech.support@psbel.com
5
SRSB-80T12C
PARAMETER
DESCRIPTION
MIN
-0.3
2.4
0
TYP
MAX
0.8
18
UNIT
V
Signal Low (Unit On)
Active Low
-
-
-
The remote on/off pin open, Unit off.
Signal High (Unit Off)
V
Current Sink
1
mA
Recommended remote on/off circuit for active low
Vin+
Vin+
On/off
On/off
Vin-
Vin-
Figure 2. Control with open collector/drain circuit
Figure 3. Control with photocoupler circuit
Vin+
Vin+
Vcc
On/off
On/off
Vin-
Vin-
Figure 4. Control with logic circuit
Figure 5. Permanently on
Input reflected ripple current
Testing setup
is
ic
Ls
Vin+
Vin-
+
+
Cs
Cin
Figure 6. Test setup
Notes and values in testing:
is: Input Reflected Ripple Current
ic: Input Terminal Ripple Current
Ls: Simulated Source Impedance (12 μH)
Cs: Offset possible source Impedance (220 μF, ESR < 0.1 Ω @ 100 kHz, 20 ˚C)
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BCD.20138_AJ
6
SRSB-80T12C
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 7. is (input terminal ripple current), AC component
Figure 8. ic (input terminal ripple current), AC component
NOTE: Test condition: 48 VDC input, 12 VDC/8.3 A output and Ta = 25 ˚C, with a 1 μF ceramic and 10 μF Tan. Cap at output.
Figure 9. is (input terminal ripple current), AC component
Figure 10. is (input terminal ripple current), AC component
NOTE: Test condition: 55 VDC input, 12 VDC/8.3 A output and Ta = 25 ˚C, with a 1 μF ceramic and 10 μF Tan. Cap
tech.support@psbel.com
7
SRSB-80T12C
Figure 11. Ripple and noise waveform
NOTE: Ripple and noise at full load, 48 VDC input,
12 VDC/8.3 A output and Ta = 25 ˚C, with a 1 µF ceramic and 10 µF Tan. cap at output.
Figure 12. Vo = 12 V, 50% to 75% Load Transients
Figure 13. Vo = 12 V, 75% to 50% Load Transients
NOTE: Transients Response at Vin = 48 V, di/dt = 0.1 A/µs, Ta = 25 ˚ C
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+86 755 298 85888
Europe, Middle East
North America
+1 866 513 2839
+353 61 49 8941
© 2021 Bel Power Solutions & Protection
BCD.20138_AJ
8
SRSB-80T12C
The output over voltage protection consists of circuitry that monitors the voltage on the output terminals. If the voltage on the output
terminals exceeds the over voltage protection threshold, the module will shut down into hiccup mode and restart once every 400 ms.
The module operates normally when the fault is cleared.
Test setup:
Vo+
K
Trim
R
Vo-
Sense+
K
Trim
R
Sense-
Figure 14. R = 10 kΩ
Figure 15.
CH1: Output voltage waveform
CH2: Output Current waveform
Test condition: 48 Vin, 8.3 A, Rload = 10 kΩ
tech.support@psbel.com
9
SRSB-80T12C
The OTP is achieved by thermistor R25 and the threshold is set at 125°C in non-latch mode; the hottest component Q13 reaches
130°C with 100 LFM air flow correspondingly. It will restart automatically when the temperature falls to 118°C. The protecting point
will be varied a little under different conditions (air flow, ambient temperature, input voltage, load...).
Figure 16.
Under-voltage Lockout
Voltage Falling
V1 = 41 V
V2 = 43 V
Voltage Rising
Input Voltage (V)
V1
V2
Figure 17. Input under voltage lockout
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Europe, Middle East
North America
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+353 61 49 8941
© 2021 Bel Power Solutions & Protection
BCD.20138_AJ
10
SRSB-80T12C
The airflow is in either the transverse or longitudinal direction.
Figure 18. Vin = 12V, Vin = 48V
Figure 19. Temperature reference points on top side
Figure 20. Temperature reference points on bottom side
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11
SRSB-80T12C
Safety :
Material flammability: UL94V-0
Approved to IEC/EN 62368-1
Approved to UL/CSA 62368-1
EMC:
1. Surge:
2. DC-DIP:
IEC61000-4-5
IEC61000-4-29
3. Conductive EMI: EN55032 class A
Compliance to EN55032 class A (both peak and average) with the following inductive and capacitive filter.
Setup:
C4
T1
T1
input
C1
C2
C3
Conv.negative
input
-Vin
C5
Figure 21. Test setup
ITEM
DESIGNATOR
PARAMETER
SMD-100V-2.2uF-X7R-1210
VENDOR
VENDOR P/N
1
2
3
4
5
6
C1
C2
C3
C4
C5
T1
TDK
C3225X7R2A225K
UHE2A221MHD6
202S41W392KV4E
AL-EL CAP 220UF 20% 100V, Lead Type
safety capacity，0.033uF/250V, 10.5*9*4-0.6-7.5mm, 1kV
SMD-2000V-3900pF-X7R-1210
Nichicon
Johanson
Common-mode Inductor-900uH-±25%-4A-R5K-21*21*12.5mm
Figure 23. Negative
Figure 22. Positive
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Europe, Middle East
North America
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+353 61 49 8941
+1 866 513 2839
© 2021 Bel Power Solutions & Protection
BCD.20138_AJ
12
SRSB-80T12C
The SRSB-80T12Cx 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 10seconds. 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 24. Soldering information
The SRSB-80T12Cx modules have a MSL rating of 3.
The SRSB-80T12Cx 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-03
This component has been designed, handled, and packaged ready for pb-free reflow soldering. If the assembly shop follows J-STD-
033 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
13
SRSB-80T12C
Figure 25. Outline
NOTES:
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].
Asia-Pacific
Europe, Middle East
North America
+86 755 298 85888
+353 61 49 8941
+1 866 513 2839
© 2021 Bel Power Solutions & Protection
BCD.20138_AJ
14
SRSB-80T12C
Figure 26. Pins
PIN
1
FUNCTION
Vin (+)
2
Remote On/Off
Vin (-)
3
4
Vout (-)
5
Vout (+)
Figure 27. Recommended pad layout
tech.support@psbel.com
15
SRSB-80T12C
Figure 28. Package information
Asia-Pacific
Europe, Middle East
North America
+86 755 298 85888
+353 61 49 8941
+1 866 513 2839
© 2021 Bel Power Solutions & Protection
BCD.20138_AJ
16
SRSB-80T12C
DATE
REVISION
CHANGES DETAIL
APPROVAL
J.Yan
2013-06-07
2014-01-18
A
B
First release
Update TD curve
J.Yan
Update Abs Max, Input specs, Output specs, General, Efficiency
data, TD, NR, Start up & Shut down, OTP, UVLO
2014-09-25
C
J.Yan
2015-02-13
2015-03-11
D
E
Update Turn on delay time, altitude, MD
J.Yan
J.Yan
Update Turn on delay time, rise time, output capacitance
Add input reflected ripple current test set up, Update outline
drawing.
2015-05-21
F
J.Yan
2015-12-17
2016-03-17
2016-04-28
G
H
I
Update input reflected ripple current, add Vin OVP
Add Packaging Information
J.Yan
J.Yan
J.Yan
Update Module photo, MD, Packaging Information
Update safety certificate and mechanical outline tolerance. Add
object ID.
2021-07-02
AJ
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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