FP131 Schematic ( PDF Datasheet ) - Feeling Technology

Teilenummer	FP131
Beschreibung	Over Current Protection IC
Hersteller	Feeling Technology
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Gesamt 11 Seiten Over Current Protection IC FP131 General Description FP131 is a 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 converter’s primary side PWM IC when over current occurs. The voltage shunt regulator has a 1.25V reference for switching power supply secondary output voltage feedback. FP131 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  Wide Operating Voltage Range: +2.7V~ +28V  Comparator Reference Voltage: 1.25V (2%)  Independent Shunt and Supply Voltages  Adjustable Sense Gain  Low Input Offset Voltage  Output Sink Current Capability up to 16mA  Package: SOP-8L Typical Application Circuit  SPS  DC-DC Converter  Isolated Fly-back DC-DC Converter  Current Sense Instrument 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 1/11 Rev. 0.9 FP131 Typical Characteristics VIN=12V, TA=25℃ Total Output Error VS Power Supply Voltage(V) 3 RG=5K　 　V=100mV 2 VCC=10V,G=20 G=1 G=10 G=20 -2 Total Output Error VS Vsense 10 Vsense=(VIN+-VIN-) 5 VCC=10V,G=25 +25℃ 0 +85℃ -5 -10 -15 0 5 10 15 20 25 30 Power Supply Voltage(V) 0 20 40 60 80 100 120 140 Vsense (mV) Quiescent Current VS Power Supply Voltage 600 Comparator Input Bias Current VS Power Supply Voltage 60 500 50 400 300 200 100 0 0 +85℃ +25℃ -25℃ 5 10 15 20 25 Power Supply Voltage (V) 30 40 30 20 10 0 0 +85℃ +25℃ -25℃ 5 10 15 20 25 Power Supply Voltage (V) 30 Output Saturation Voltage VS Outpt Sink Current 1.2 1.0 0.8 0.6 0.4 0.2 0 0 10 20 30 40 50 60 Output Sink Current (mA) 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 6/11 Rev. 0.9 6 Page
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FP130A	RAIL CURRENT MEASUREMENT IC	Feeling Technology
FP131	Over Current Protection IC	Feeling Technology
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