ISL78692

Li-ion/Li-Polymer Battery Charger

Product Status: Mass Production

OVERVIEW

The ISL78692 is an integrated single-cell Li-ion or Li-polymer battery charger capable of operating with an input voltage as low as 2.65V (cold crank case). This charger is designed to work with various types of AC adapters or a USB port.

The ISL78692 operates as a linear charger when the AC adapter is a voltage source. The battery is charged in a CC/CV (constant current/constant voltage) profile. The charge current is programmable with an external resistor up to 1A. The ISL78692 can also work with a current-limited adapter to minimize the thermal dissipation.

The ISL78692 features charge current thermal foldback to guarantee safe operation when the printed circuit board’s thermal dissipation is limited due to space constraints. Additional features include preconditioning of an over-discharged battery, an NTC thermistor interface for charging the battery in a safe temperature range and automatic recharge. The device is specified for operation in ambient temperatures from -40°C to +85°C and is offered in a 3x3mm thermally enhanced DFN package.

KEY FEATURES

  • Complete charger for single-cell Lithium chemistry batteries
  • Integrated power transistor and current sensor
  • Reverse battery leakage 700nA
  • 1% initial voltage accuracy
  • Programmable CC current up to 1A
  • Charge current thermal foldback
  • NTC thermistor interface for battery temperature alert
  • Accepts CV and CC types of adapters or USB bus power
  • Preconditioning trickle charge
  • Guaranteed to operate down to 2.65V after start-up
  • Ambient temperature range: -40°C to +85°C
  • AEC-Q100 qualified

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL78692
Basic Information
生产状态
Mass Production
输出电压典型值 (V)
4.1
电压精度 (%)
1
VIN1 (最大值) (V)
7
输出电流1最大值 (A)
1.6
安全定时器
Yes
自终止
Yes
接受CC适配器
Yes
VIN1涓流充电 (最小值) (% CC)
10
热调节
Yes
功能
Enable, Charge Status, Fault Indication, NTC Input, Timeout Disable, Programmable IMIN, Reference Voltage
电池化学物品
Single Cell Li+/Polymer
资质级别
Automotive
CAN 采样
YES
温度范围
-40 to +85

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