VIPER20-22-E STMicroelectronics

VIPer20-E VIPer20DIP-E SMPS PRIMARY I.C. General Features V I R Type DSS n DS(on) VIPer20-E/DIP-E 620V 0.5A 16 PENTAWATT HV DIP-8 ADJUSTABLE SWITCHING FREQUENCY UP PENTAWATT HV (022Y) TO 200 kHz CURRENT MODE CONTROL SOFT START AND SHUTDOWN CONTROL Description AUTOMATIC BURST MODE OPERATION IN VIPer20-E/DIP-E, made using VIPower M0 STAND-BY CONDITION ABLE TO MEET Technology, combines on the same silicon chip a BLUE ANGEL NORM (<1w TOTAL POWER state-of-the-art PWM circuit together with an CONSUMPTION) optimized, high voltage, Vertical Power MOSFET INTERNALLY TRIMMED ZENER (620V/ 0.5A). REFERENCE Typical applications cover offline power supplies UNDERVOLTAGE LOCK-OUT WITH with a secondary power capability of 10W in wide HYSTERESIS range condition and 20W in single range or with INTEGRATED START-UP SUPPLY doubler configuration. It is compatible from both OVER-TEMPERATURE PROTECTION primary or secondary regulation loop despite using around 50% less components when LOW STAND-BY CURRENT compared with a discrete solution. Burst mode ADJUSTABLE CURRENT LIMITATION operation is an additional feature of this device, offering the ability to operate in stand-by mode Block Diagram without extra components. OSC DRAIN ON/OFF OSCILLATOR SECURITY PWM LATCH LATCH S UVLO FF FF VDD R/S Q R1 Q LOGIC S R2 R3 OVERTEMP. DETECTOR 0.5V + 1.7 + 0.5 V + 6 V/A 250 ns s Blanking delay CURRENT ERROR AMPLIFIER AMPLIFIER 13 V + 4.5 V COMP SOURCE Rev 1 September 2005 1/31 www.st.com 31 Obsolete Product(s) - Obsolete Product(s) FC00491 VIPer20-E/DIP-E Contents 1 Electrical Data 4 1.1 Maximum Rating . 4 1.2 Electrical Characteristics . 5 2 Thermal Data . 7 3 Pin Description . 8 3.1 Drain Pin (Integrated Power MOSFET Drain): 8 3.2 Source Pin: . 8 3.3 VDD Pin (Power Supply): 8 3.4 Compensation Pin 8 3.5 OSC Pin (Oscillator Frequency): . 9 4 Typical Circuit . 10 5 Operation Description . 11 5.1 Current Mode Topology: .11 5.2 Stand-by Mode 11 5.3 High Voltage Start-up Current Suorce 12 5.4 Transconductance Error Amplifier . 13 5.5 External Clock Synchronization: 14 5.6 Primary Peak Current Limitation 14 5.7 Over-Temperature Protection 14 5.8 Operation Pictures 15 2/31 Obsolete Product(s) - Obsolete Product(s)