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.

FEATURE
■ ADJUSTABLE SWITCHING FREQUENCY UP TO 200KHZ
■ CURRENT MODE CONTROL
■ SOFT START AND SHUT DOWN CONTROL
■ AUTOMATIC BURST MODE OPERATION IN STAND-BY CONDITION ABLE TO MEET ”BLUE ANGEL” NORM (1W TOTAL POWER CONSUMPTION)
■ INTERNALLY TRIMMED ZENER REFERENCE
■ UNDERVOLTAGE LOCK-OUT WITH HYSTERESIS
■ INTEGRATED START-UP SUPPLY
■ AVALANCHERUGGED
■ OVERTEMPERATURE PROTECTION
■ LOW STAND-BY CURRENT
■ ADJUSTABLE CURRENT LIMITATION