Protection IC. FP133 Datasheet

FP133 IC. Datasheet pdf. Equivalent


Part FP133
Description Over Current Protection IC
Feature FP133 Over Current Protection IC With Shunt Regulator General Description FP133 is a main rail curre.
Manufacture Feeling Technology
Datasheet
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FP133 Over Current Protection IC With Shunt Regulator Genera FP133 Datasheet
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FP133
FP133
Over Current Protection IC With Shunt Regulator
General Description
FP133 is a main rail current detection and over current protection IC. It includes a current shunt
comparator and shutdown comparator with a precision shunt regulator like FP431.
The rail current detection gain can be adjusted with three external resistors. The regulator
output CSO pin is connected to a shutdown comparator for driving a protection circuit like a
photo-coupler to shutdown the primary side PWM IC when over current occurs.
The voltage shunt regulator has a 2.5V reference for switching power supply secondary output
voltage feedback.
FP133 can be used for OCP and output voltage feedback function with few external parts. It is
suitable for application in secondary main rail power supply of SPS or isolated fly-back DC-DC
converter.
Features
Independent Power Supply Voltage: 2.7 to 28V
Wide Operating Temperature Range: -20~ +105
Independent Shunt and Supply Voltage
Low Input Offset Voltage
Sense Gain Adjustable
Built-in 1.25V Comparator for O.C.P
Shunt Regulator Voltage: 2.5V (1.0%)
Output Sink Current Capability up 50mA
Package: SOP-8L
Typical Application Circuit
SPS
AC Adaptor
Isolated Fly-back DC-DC Converter
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
1/10
Rev. 0.9



FP133
Function Block Diagram
VIN
VCC
Current Shunt Regulator
with Shutdown Comparator
FP133
CA REF
Voltage Shunt
Regulator
1.25V
2.5V
VIP
Pin Descriptions
CSO
SOP-8L
Top View
VIP 1
8
CSO 2
7
REF 3
6
CA 4
5
VIN
VCC
FPO
GND
FPO
GND
(AN)
Name
VIP
CSO
REF
CA
GND
FPO
VCC
VIN
No. I / O
Description
1 I Positive Input of Current Shunt OPA
2
O/I
Output of Current Shunt OPA to Inverting
Input of Shutdown Comparator
3 I 2.5V Reference
4 I Voltage Shunt Cathode Input
5 P IC Ground
6 O Shutdown Comparator Output (O.C.)
7 P IC Power Supply
8 I Inverting Input of Current Shunt OPA
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
2/10
Rev. 0.9







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