TOP104YN

TOP100-4 TOPSwitch Three-terminal Off-line PWM Switch AC IN DRAIN SOURCE CONTROL TOPSwitch TOPSwitch SELECTION GUIDE ORDER PART NUMBER OUTPUT POWER RANGE FLYBACK PFC/ BOOST 100/110 V VAC 48 V DC 100/110 VAC N* N* N* N* N* July 2009 TOP100-4 CONTROL VC 0 ZC SHUNT REGULATOR/ ERROR AMPLIFIER + 5.7 V 5.7 V 4.7 V SHUTDOWN/ 1 AUTO-RESTART + - POWER-UP RESET EXTERNALLY TRIGGERED SHUTDOWN IFB THERMAL SHUTDOWN INTERNAL SUPPLY ÷8 RQ SQ OSCILLATOR DMAX CLOCK SAW + PWM COMPARATOR SQ RQ RE Figure 2. Functional Block Diagram. DRAIN + - VILIMIT CONTROLLED TURN-ON GATE DRIVER LEADING EDGE BLANKING MINIMUM ON-TIME DELAY SOURCE PI-1746-011796 Pin Functional Description DRAIN Pin: Output MOSFET drain connection. Provides internal bias current during start-up operation via an internal switched highvoltage current source. Internal current sense point. CONTROL Pin: Error amplifier and feedback current input pin for duty cycle control. Internal shunt regulator connection ...