UC3844 CURRENT MODE PWM IC DIP-8

UC3844 CURRENT MODE PWM IC DIP-8

Description
The UCx84x series of control integrated circuits provide the features that are necessary to
implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum
number of external components. The internally implemented circuits include an under voltage
lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed
for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation,
a pulse-width modulation (PWM) comparator that also provides current-limit control, and a totem-pole
output stage that is designed to source or sink high-peak current. The output stage, suitable for driving
N-channel MOSFETs, is low when it is in the off state.