Product Summary

The UCC25702PWTRG4 is a pulse width modulator intended for isolated switching power supplies using primary side control. The UCC25702PWTRG4 can be used for both off-line applications and DC/DC converter designs such as in a distributed power system architecture or as a telecom power source. The UCC25702PWTRG4 features low startup current, allowing for efficient off-line starting, yet have sufficient output drive to switch power MOSFETs in excess of 500kHz.

Parametrics

UCC25702PWTRG4 absolute maximum ratings: (1)Supply voltage (Supply current limited to 20mA): 15V; (2)Supply Current: 20mA; (3)Input pins ( ILIM,VFF,RT,CT,VSCLAMP,SYNC,SS): 6V; (4)Output Current (OUT) DC: +/–180mA; (5)Output Current (OUT) Pulse (0.5ms): +/–1.2A; (6)Storage Temperature: –65 to +150℃; (7)Junction Temperature: –55 to +150℃; (8)Lead Temperature (Soldering, 10 sec.): +300℃.

Features

UCC25702PWTRG4 features: (1)700kHz Operation; (2)Integrated Oscillator/ Voltage Feed Forward Compensation; (3)Accurate Duty Cycle Limit; (4)Accurate Volt-second Clamp; (5)Optocoupler Interface; (6)Fault Counting Shutdown; (7)Fault Latch off or Automatic Shutdown; (8)Soft Stop Optimized for Synchronous Rectification; (9)1A Peak Gate Drive Output; (10)130μA Start-up Current; (11)750μA Operating Current.

Diagrams

UCC25702PWTRG4 block diagram

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