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AMC DOC. #: AMC3842B_C (LF) March 2004 ®
AMC3842B/43B
CURRENT MODE PWM CONTROLLER
FEATURES
ADD MICROTECH CORP.
DESCRIPTION
The AMC3842B/43B are fixed frequency current-mode PWM controllers specially designed for OFF-Line switching power supply and DC-to-DC converters with a minimum number of external components. These devices feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and high current totem pole output which is suitable for driving MOSFETs. The under voltage lock-out (U.V.L.O.) is designed to operated with 200µA typ. start-up current, allowing an efficient bootstrap supply voltage design. The U.V.L.O.
AMC3842B Datasheet
