ISL9301

High Input Voltage Charger With Power Path Management

OVERVIEW

The ISL9301 is a fully integrated high input voltage single-cell Li-ion battery charger with power path management function. This charger performs the CC/CV charge function required by Li-ion batteries. The charger accepts an input voltage up to 28V but is disabled when the input voltage exceeds 10.5V OVP threshold. The 28V rating eliminates the overvoltage protection circuit required in a low-voltage charger. The charge current and the end-of-charge (EOC) current are programmable with external resistors. When the battery voltage is lower than 2.8V, the charger preconditions the battery with 16% of the programmed charge current. When the charge current reduces to the programmable EOC current level during the CV charge phase, the EOC indicator (CHG ) will toggle to logic HIGH to indicate the end-of-charge condition. The charger will continue to charge until the user programmed timeout interval has elapsed, then the charger is terminated.

The ISL9301 uses separate power paths to supply the system load and charge the battery. This feature allows the system to immediately operate with a completely discharged battery. This feature also allows the charge to terminate when the battery is full while continuing to supply the system with the input source, thus minimizing unnecessary charge/discharge cycles and improving the battery life.

Two indication pins (PPR and CHG ) allow simple interface to a microprocessor or LEDs.

KEY FEATURES

  • Complete Charger for Single-Cell Li-ion/Polymer Batteries
  • Power Path Management Optimize Charge and System Currents
  • Intelligent Timeout Interval Based on Actual Charge Current
  • Integrated Disconnect Switch to Disconnect the Battery
  • 1% Charger Output Voltage Accuracy
  • Programmable Charge Current
  • Programmable End-of-Charge Current
  • Charge Current Thermal Foldback for Thermal Protection
  • Trickle Charge for Fully Discharged Batteries
  • 28V Maximum Voltage at VIN pin
  • Power Presence and Charge Indications
  • Ambient Temperature Range: -40°C to +85°C
  • 10 Ld 3x3 DFN Package
  • Pb-Free (RoHS Compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL9301
Basic Information
生产状态
Mass Production
输出电压典型值 (V)
4.5
电压精度 (%)
1
VIN1 (最大值) (V)
28
输出电流1最大值 (A)
0.8
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)
6
热调节
Yes
功能
Power Presence, Charge Indication, Battery Disconnect, IREF, IMIN Set, Time Set
电池化学物品
Single Cell Li+/Polymer
资质级别
Standard
CAN 采样
YES
温度范围
-40 to +85

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