Transition-mode PFC controller - STMicroelectronics
VOLTAGE REGULATOR UVLO INTERNAL SUPPLY 7V +-2.5V R1 R2 R S Q - + DRIVER STARTER +-ZERO CURRENT DETECTOR DISABLE 2.1 V 1.6 V VCC 8 1 23 4 ZCD VCC INV COMP MULT CS GD 7 5 GND 6 25 V 40K 5pF 15 V Starter ... VZCDT Triggering Voltage (negative-going edge) (3) 1.6 V IZCDb Input Bias Current V ZCD = 1 to 4.5 V 2µA IZCDsrc …
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