UCC29421PW Datasheet PDF - TI

●description

●The UCC39421 family of synchronous PWM controllers is optimized to operate from dual alkaline/NiCd cells or a single Lithium-Ion (Li-Ion) cell, and convert to adjustable output voltages from 2.5 V to 8 V. For applications where the input voltage does not exceed the output, a standard boost configuration is used.

●Operation Down to an Input Voltage of 1.8 V

●High Efficiency Boost, SEPIC or Flyback (Buck-Boost) Topologies

●Drives External FETs for High-Current Applications

●Up to 2-MHz Oscillator

●Synchronizable Fixed Frequency Operation

●High-Efficiency Low-Power Mode

●High-Efficiency at Very Low-Power with Programmable Variable Frequency Mode

●Pulse-by-Pulse Current Limit

●5-µA Supply Current in Shutdown

●150-µA Supply Current in Sleep Mode

●Selectable NMOS or PMOS Rectification

●Built-In Power-On Reset(UCC39422 Only)

●Built-In Low-Voltage Detect(UCC39422 Only)

● simplified schematic block diagram and application circuit