The UC3842BN is a high performance current mode PWM Controller IC provides the necessary 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 trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control and a totem pole output stage designed to source or sink high peak current.
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 under-voltage lockout
(EN)
