EC3653-16V 3A 4-Switch Buck-Boost Charging/Discharging Converter

General description

The EC3653 is a buck boost converter targets HVDC fast charging and discharging power bank.

The EC3653 supports 1 to 3 cells Li-ion battery, the output voltage can be programmable up  to 16.0V  through external resistor.

The EC3653 implements the Buck Boost converter with an H-bridge, which can maintain output regulation for Input voltage whether greater or less than output voltage.

The integrated low Rds(on) MOSFET minimizes physical footprint, maximizes charge/discharge efficiency, which reduces the power dissipation during discharge. Constant current control is utilized to protect the device from overshooting in unwanted conditions. Built-in loop compensation simplifies the circuit and design. PFM is engaged to maintain high efficiency at light load current.

EC3653 guarantees robustness with thermal protection and battery under voltage lockout.


  • Integrate low RDS (on) power MOSFET
  • Wide input range: 2V-16.0V, Support 1 to 3
  • cells battery charge/discharge.
  • Wide output range:0.9V-16.0V
  • High efficiency buck-boost transition
  • 500kHz Switching frequency
  • Programmable output current limit(up to 3A)
  • Output Constant Current
  • Quiescent current: <50uA
  • Integrate output overvoltage protection and
  • output short protection
  • Integrate thermal protection
  • QFN3*4 package


  • Power bank systems
  • Battery and Super Capacitor Charging
  • USB Power Delivery
  • Industrial applications
  • Automotive Systems