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发布者:微桥FP133 发布时间:2010-1-16 阅读:4763次    关键字: FP133
FP133-OVER CURRENT PROTECTION IC SHUNT REGULATOR


FP133 OVER CURRENT PROTECTION IC WITH SHUNT REGULATOR

General Description
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 FP133 is a main rail current detection and over current protection IC. It is including a current shunt comparator and shutdown comparator with a precision shunt regulator like FP431.
 The current shunt comparator has the any gain adjustable function for rail current detection using three external resistors, and inter-connecting to a shutdown comparator for driving a protection circuit like a photo-coupler to shutdown the primary side PWM IC when over current is occurred.
And the voltage shunt regulator has a 2.5V reference for switching power supply secondary output voltage feedback.
 FP133 is used with a few external parts for O.C.P. and output voltage feedback function and good active point during wide temperature range in secondary main rail power supply of SPS or isolated fly-back DC-DC converter application field.

 
Features
˙Wide operating voltage range: +2.7V~ +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: PDIP8/SOP8
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