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Description

High Performance. Current Mode Controllers. The UC3844, UC3845 series are high performance fixed frequency current mode controllers. They are specifically UC1844, UC2844, UC3844, UC1845, UC2845, UC3845 . SLUS223E APRIL 1997 REVISED JANUARY 2017. UCx84x Current-Mode PWM Controllers. Page 1. UC2842B/3B/4B/5B. UC3842B/3B/4B/5B. March 1999. HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER .TRIMMED OSCILLATOR The differences between UC3844 and UC3845 are the maximum duty cycle ranges and under-voltage lockout thresholds. The. UC3844 ideally suited to off- line low voltage inhibit limit of the UC3845 which is 8.0 V at the low input voltage. Peak rectifying the auxiliary winding in the forward conduction mode, yields a