- TRIMMED OSCILLATOR FOR PRECISE FREQUENCY CONTROL - OSCILLATOR FREQUENCY GUARANTEE DAT 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 UC3843B HIGH PERFORMANCE CURRENT PWM CONTROLLER TAGS DE UC3843B: UC3843B, UC3843, 3843, UC2842B, UC3842B