General Description

The EJW3655 is a buck boost converter targets HVDC fast charging system.
The EJW3655 supports 1 to 3 cells Li-ion battery, the full charge voltage and charge current can be programmed through external resistor.
The EJW3655 implements the Buck Boost converter with an H-bridge.
The integrated low RDS(on) MOSFET minimizes physical footprint, maximizes charge efficiency.
Built-in loop compensation simplifies the circuit and design.
PFM is engaged to maintain high efficiency at light load current.
EJW3655 guarantees robustness with thermal protection and battery under voltage lockout.

Features

◆Integrate low RDS(on) power MOSFET
◆Wide input range:4.2V-20.0V, support 1 to 3 cells battery charge
◆Full charge voltage: 1.2V-20.0V through external resistor or selectable by BATFB pin EJW3655A(4.2V/cell)/ EJW3655A1 (4.35V/cell)
◆High efficiency buck-boost transition
◆450kHz Switching frequency
◆Programmable charge current, up to 3A
◆Quiescent current: <60uA
◆Integrate battery short protection
◆Integrate thermal protection
◆QFN3*4 package
Applications
◆Power bank systems
◆Battery and super capacitor charging
◆USB power delivery
◆Industrial applications
◆Automotive systems