• l  Maximum 18V Input Voltage Surge

  l  Input Voltage UVLO and OVP

  l  4.2V/4.35V Selectable Battery Cell Voltage

  l  +/-0.5% Cell Voltage Accuracy

  l  500kHz Switching Frequency Operation

  l  Trickle Current / Constant Current / Constant Voltage Charge Mode with Internal Compensation

  l  Maximum 2A Constant Charge Current

  l  Maximum 2.5A Boost Output Current

  l  Charge / Discharge / Fault Status Indicator

  l  Discharging Control Logic

  l  Programmable Input Current Limit

  l  Bad Adapter Detection

  l  Built-In Power Path NFETs and Power Switches

  l  Dynamic Power Management

  l  Cycle-by-Cycle Peak Current Limit

  l  Boost Output Short Circuit Protection

  l  Thermal Shutdown

The SY20718C is a 5V controller featuring a bi-directional regulator capable of handling surges up to 18V. It is designed for single-cell Li-Ion battery power bank applications. The regulator employs advanced bi-directional energy flow control with automatic input power source detection, facilitating seamless switching between battery charging and power supply modes.

The SY20718C also integrates the discharging enable/disable control and LED status and fault indicator features. 

Input overvoltage and overcurrent, battery overvoltage, boost short circuit, charging timeout and battery thermal protections are provided for reliable system operation.

The total solution can be easily configured using a few passive components and doesn’t require the use of a microcontroller to supervise operation.

The SY20718C is available in a compact QFN 3mmx3mm package.