SY20764BQDC - High Efficiency, 3.5A, Multi-Cell Li-Ion Battery Charger


  • Integrated Synchronous Buck and Reverse Blocking FET with 16V Rating
  • Adaptive  Input Power Limit for 4-14V Wide Input Voltage
  • Maximum 3.5A Programmable Charge Current
  • 4.25V and 4.4V Constant Voltage Selectable
  • +/-0.5% Cell Voltage Accuracy
  • Support Single-cell or Two-cell Battery Pack
  • External Shutdown Function
  • Input Voltage UVLO and OVP
  • Thermal Fold-back Protection
  • Over Temperature Protection
  • Battery Short  Protection
  • Programmable Charge Timeout
  • Charge Status Indication
  • Low Profile QFN3×3 Package for Portable Applications

Typical Application


The SY20764B is a 4-14V input, 3.5A multi-cell Li-ion battery step-down charger. The charge current up to 3.5A can be programmed by using the external resistor for different portable applications. It also has a programmable charge timeout and adaptive input power limit for safety battery charge operation. It consists of 16V rating reverse blocking FET and power switching FETs with extremely low on resistance to achieve high charge efficiency and simple peripheral circuit design.

The SY20764B is available in QFN3×3 package to minimize the PCB layout size for wide portable application.


  • Power Bank
  • Cellular Telephones, PDA, MP3 Players, MP4 Players
  • PSP Game Players, NDS Game Players