UC3843T Datasheet (STMicroelectronics) - (UC3842T - UC3845T) HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

UC3843T, (UC3842T - UC3845T) HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

www.DataSheet4U.com ® UC3842T UC3843T UC3844T UC3845T HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER .

TRIMMED OSCILLATOR FOR PRECISE FREQUENCY CONTROL OSCILLATOR FREQUENCY GUARANTEED AT 250kHz CURRENT MODE OPERATION TO 500kHz AUTOMATIC FEED FORWARD COMPENSATION LATCHING PWM FOR CYCLE-BY-CYCLE CURRENT LIMITING INTERNALLY TRIMMED REFERENCE WITH UNDERVOLTAGE LOCKOUT HIGH CURRENT TOTEM POLE OUTPUT UNDERVOLTAGE LOCKOUT WITH HYSTERESIS LOW START-UP AND OPERATING CURRENT Minidip S

UC3843T Features

* to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trim