EJW3655 High Efficiency,3A, Multi-Cells Li-Ion Battery Charger


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.


◆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