VIPER28LN

Product Summary

The VIPER28LN is an off-line converter with an 800 V rugged power section, a PWM control, two levels of over-current protection, over-voltage and overload protections, hysteretic thermal protection, soft-start and safe auto-restart after any fault condition removal. Burst mode operation and device very low consumption help to meet the standby energy saving regulations. Advance frequency jittering reduces EMI filter cost. The extra power timer allows the management of output peak power for a designed time window. The applications of the VIPER28LN include Auxiliary power supply for consumer and home equipment, ATX auxiliary power supply, Low / medium power AC-DC adapters, SMPS for set-top boxes, DVD players and recorders, white goods.

Parametrics

VIPER28LN absolute maximum ratings: (1)Drain-to-source (ground) voltage, VDRAIN: 800 V; (2)Repetitive avalanche energy (limited by TJ = 150℃), EAV: 5mJ; (3)Repetitive avalanche current (limited by TJ= 150℃), IAR: 1.5 A; (4)Pulse drain current (limited by TJ= 150℃), IDRAIN: 3 A; (5)Control input pin voltage (with ICONT= 1 mA), VCONT: -0.3 to Self limited V; (6)Feed-back voltage, VFB: -0.3 to 5.5 V; (7)EPT input pin voltage, VEPT: -0.3 to 5 V; (8)Supply voltage (IDD= 25 mA), VDD: -0.3 to Self limited V; (9)Input current, IDD: 25 mA; (10)Power dissipation at TA < 40℃ (DIP-7), PTOT: 1W; Power dissipation at TA < 60℃ (SO16N, SDIP-10), PTOT: 1.5; (11)Operating junction temperature range, TJ: -40 to 150℃; (12)Storage temperature, TSTG: -55 to 150℃.

Features

VIPER28LN features: (1)800 V avalanche rugged power section; (2)PWM operation with frequency jittering for low EMI; (3)Operating frequency: 60 kHz for L type; 115 kHz for H type; (4)Standby power < 50 mW at 265 VAC; (5)Limiting current with adjustable set point; (6)Adjustable and accurate over-voltage protection; (7)On-board soft-start; (8)Safe auto-restart after a fault condition; (9)Hysteretic thermal shutdown; (10)Delayed overload protection.

Diagrams