VIPER50-E STMicroelectronics

VIPer50-E SMPS PRIMARY I.C. General Features V I R Type DSS n DS(on) VIPer50-E 620V 1.5A 5 ADJUSTABLE SWITCHING FREQUENCY UP PENTAWATT HV PENTAWATT HV (022Y) TO 200 kHz CURRENT MODE CONTROL SOFT START AND SHUTDOWN CONTROL Description AUTOMATIC BURST MODE OPERATION IN VIPer50-E, made using VIPower M0 Technology, STAND-BY CONDITION ABLE TO MEET combines on the same silicon chip a state-of-the- BLUE ANGEL NORM (<1w TOTAL POWER art PWM circuit together with an optimized, high CONSUMPTION) voltage, Vertical Power MOSFET (620V/ 1.5A). INTERNALLY TRIMMED ZENER REFERENCE Typical applications cover offline power supplies with a secondary power capability of 25W in wide UNDERVOLTAGE LOCK-OUT WITH range condition and 50W in single range or with HYSTERESIS doubler configuration. It is compatible from both INTEGRATED START-UP SUPPLY primary or secondary regulation loop despite OVER-TEMPERATURE PROTECTION using around 50% less components when compared with a discrete solution. Burst mode LOW STAND-BY CURRENT operation is an additional feature of this device, ADJUSTABLE CURRENT LIMITATION offering the ability to operate in stand-by mode without extra components. Block Diagram DRAIN OSC ON/OFF OSCILLATOR SECURITY PWM LATCH LATCH S FF UVLO VDD R/S Q R1 Q FF LOGIC S R2 R3 OVERTEMP. DETECTOR 0.5V + 0.5 V + + 2 V/A 1.7 s 250 ns DELAY BLANKING CURRENT ERROR AMPLIFIER AMPLIFIER 13 V + 4.5 V COMP SOURCE Rev 1 September 2005 1/29 www.st.com 29 Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) C 91 F 002 VIPer50-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 V Pin (Power Supply): . 8 DD 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 2/29 Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)