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VIPER53ESP-E Datasheet(PDF) 1 Page - STMicroelectronics |
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VIPER53ESP-E Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 31 page  January 2006 DocRev1 1/31 31 VIPer53EDIP - E VIPer53ESP - E OFF-line Primary Switch Features ■ Switching frequency up to 300kHz ■ Current mode control with adjustable limitation ■ Soft start and shut-down control ■ Automatic burst mode in standby condition (“Blue Angel“ compliant ) ■ Undervoltage lockout with Hysteresis ■ Integrated start-up current source ■ Over-temperature protection ■ Overload and short-circuit control ■ Overvoltage protection ■ In compliance with the 2002/95/EC European Directive Description The VIPer53E combines an enhanced current mode PWM controller with a high voltage MDMesh Power MOSFET in the same package. Typical applications cover offline 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 and 40W in wide range input voltage, or 65W in single European voltage range and PowerSO-10 package, with the following benefits: – Overload and short-circuit events controlled by feedback monitoring and delayed device reset; – Efficient standby mode by enhanced pulse skipping. – Integrated start-up current source is disabled during normal operation to reduce the input power. DIP-8 PowerSO-10 www.st.com Block diagram FF OSCILLATOR 150/400ns BLANKING 1V OVERTEMP. DETECTOR 8.4/ 11.5V VDD OSC DRAIN COMP SOURCE PWM LA TCH ON/OFF BLANKING TIME SELECTION PWM COMPARATOR CURRENT AMPLIFIER S R1 R2 R3 R4 R5 Q OVERLOAD COMPARATOR 18V 125k 0.5V STANDBY COMPARATOR OVERVOLTAGE COMPARATOR UVLO COMPARATOR H COMP 0.5V 4.4V 4.5V TOVL 8V 4V Vcc I COMP |
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