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VIPER53DIP Datasheet(PDF) 1 Page - STMicroelectronics |
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VIPER53DIP Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 24 page  June 2004 1/24 VIPer53DIP VIPer53SP OFF LINE PRIMARY SWITCH ® TYPICAL OUTPUT POWER CAPABILITY Note: Above power capabilities are given under adequate thermal conditions FEATURES n SWITCHING FREQUENCY UP TO 300 kHz n CURRENT LIMITATION n CURRENT MODE CONTROL WITH ADJUSTABLE LIMITATION n SOFT START AND SHUT DOWN CONTROL n AUTOMATIC BURST MODE IN STAND-BY CONDITION (“BLUE ANGEL” COMPLIANT) n UNDERVOLTAGE LOCKOUT WITH HYSTERESIS n HIGH VOLTAGE STARTUP CURRENT SOURCE n OVERTEMPERATURE PROTECTION n OVERLOAD AND SHORT-CIRCUIT CONTROL DESCRIPTION The VIPer53 combines in the same package an enhanced current mode PWM controller with a high voltage MDMesh Power Mosfet. Typical applications cover off line power supplies with a secondary power capability ranging up to 30W in wide range input voltage or 50W in single European voltage range and DIP-8 package, with the following benefits: – Overload and short circuit controlled by feedback monitoring and delayed device reset. – Efficient standby mode by enhanced pulse skipping. – Primary regulation or secondary loop failure protection through high gain error amplifier. TYPE European (195 - 265 Vac) US / Wide range (85 - 265 Vac) DIP-8 50W 30W PowerSO-10 ™ 65W 40W 1 10 DIP-8 PowerSO-10™ BLOCK DIAGRAM FF OSCILLATOR 150/400ns BLANKING 1V 4V OVERTEMP. DETECTOR 8.4/ 11.5V 15V 0.5V VDD OSC DRAIN TOVL COMP SOURCE PWM LATCH ON/OFF BLANKING TIME SELECTION PWM COMPARATOR CURRENT AMPLIFIER S R1 R2 R3 R4 R5 Q 8V 4.35V OVERLOAD COMPARATOR 18V 4.5V 125k 0.5V STANDBY COMPARATOR OVERVOLTAGE COMPARATOR ERROR AMPLIFIER UVLO COMPARATOR H COMP |
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