BUY UC3909DW https://www.utsource.net/itm/p/221158.html
Battery Management
Package: SOP20
Description: UC3909DW is a high-performance, low-cost, high-efficiency, current-mode PWM controller.
Features:
Wide input voltage range: 4.5V to 40V
Internal soft-start
Internal oscillator
Low start-up current
Output current limit
Over-temperature protection
Internal compensation
Output voltage adjustable
Low shutdown current
Low quiescent current
Low EMI
Applications:
Switching power supplies
AC/DC converters
DC/DC converters
Battery chargers
Motor control
(For reference only)