VIPer20BSP

® VIPer20B VIPer20BSP SMPS PRIMARY I.C. PRELIMINARY DATA T YPE VIPer20B/ SP V DSS 400V In 1.3 A R DS(on) 8.7 Ω 10 1 FEATURE s ADJUSTABLE SWITCHING FREQUENCY UP TO 200KHZ s CURRENT MODE CONTROL s SOFT START AND SHUT DOWN CONTROL s AUTOMATIC BURST MODE OPERATION IN STAND-BY CONDITION ABLE TO MEET ”BLUE ANGEL” NORM (1W TOTAL POWER CONSUMPTION) s INTERNALLY TRIMMED ZENER REFERENCE s UNDERVOLTAGE LOCK-OUT WITH HYSTERESIS s INTEGRATED START-UP SUPPLY s AVALANCHE RUGGED s OVERTEMPERATURE PROTECTION s LOW STAND-BY CURRENT s ADJUSTABLE CURRENT LIMITATION BLOCK DIAGRAM PENTAWATT HV Power SO-10 DESCRIPTION VIPer20B™ combines on the same silicon chip a state-of-the-art PWM circuit together with an optimized high voltage avalanche rugged Vertical Power MOSFET (400V 1.3A). Typical applications cover off line power supplies with a secondary max power capability of 30W. It is compatible from both primary or secondary regulation loop despite using around 50% less components when compared with a discrete solution. Burst mode operation is an additional feature of this device, offering the possibility to operate in stand-by mode without extra components. OSC DRAIN ON/OFF OSCILLATOR SECURITY LATCH VDD UVLO LOGIC R/S FF S Q PWM LATCH R1 S FF R2 R3 Q OVERTEMP. DETECTOR 0.5 V + _ 2 µs delay 300 ns Blanking + _ + 0.5V _ 6 V/A _ 13 V + ERROR AMPLIFIER CURRENT AMPLIFIER 4.5 V COMP SOURCE FC00490 September 1999 1/17 VIPer20B / VIPer20BSP ABSOLUTE MAXIMUM RATING Symb ol V...