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KA3882E Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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KA3882E Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 6 page ©2003 Fairchild Semiconductor Corporation www.fairchildsemi.com Rev. 1.0.1 Features • Low start current 0.2mA (typ) • Operating range up to 500kHz • Cycle by cycle current limiting • Under voltage lock out with hysteresis • Short shutdown delay time: typ.100ns • High current totem-pole output • Output swing limiting: 22V Description The KA3882E/KA3883E is a fixed PWM controller for Off-Line and DC to DC converter applications. The internal circuits include a UVLO, a low start-up current circuit, a temperature compensated reference, a high gain error amplifier, a current sensing comparator, and the high current totem-pole output for driving a POWER MOSFET. Also the KA3882E/KA3883E provides low start-up current below 0.3mA and short shutdown delay time typ. 100ns. The KA3882E has UVLO threshold of 16V(on) and 10V(off). The KA3883E is 8.4V(on) and 7.6V(off). The KA3882E and KA3883E can operate within 100% duty cycle. 8-DIP 8-SOP 1 1 Internal Block Diagram 8 + - 7 5 SET/ RESET 5V VREF Internal Bias Good LOGIC 2 R S OSCILLATOR 1 3 4 T 7 6 5 UVLO 29V 22V 1/3 Error Amp 1/2VREF 1V C.S Comp. PWM LATCH VREF VFB COMP C.S RT/CT OUTPUT VCC GND PWR VC PWR GND KA3882E/KA3883E SMPS Controller |
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