ISL88733

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SMBus Level 2 Battery Charger

Product Status: Mass Production

OVERVIEW

The ISL88733 is a highly integrated Lithium-ion battery charger controller, programmable over the SMBus system management bus (SMBus). The ISL88733 is intended to be used in a smart battery charger (SBC) within a smart battery system (SBS) that throttles the charge power such that the current from the AC-adapter is automatically limited. High efficiency is achieved with a DC/DC synchronous-rectifier buck converter, equipped with diode emulation for enhanced light load efficiency. The ISL88733 charges one to four Lithium-ion series cells, and delivers up to 8A charge current. Integrated MOSFET drivers and bootstrap diode result in fewer components and smaller implementation area. Low offset current-sense amplifiers provide high accuracy with 10mΩ sense resistors. The ISL88733 provides 0.5% end-of-charge battery voltage accuracy.

The ISL88733 is available in a small 5mmx5mm 28 Ld Thin (0.8mm) QFN package.

KEY FEATURES

  • Pin compatible with ISL88731
  • Over-temp and overcurrent protection
  • 0.5% battery voltage accuracy
  • 4% adapter current limit accuracy
  • 3% charge current accuracy
  • SMBus 2-wire serial interface
  • Charge current limited by SMBus DAC OR analog voltage at the CCLIM pin
  • Monitor outputs
  • Adapter current (3% Accuracy)
  • Adapter overcurrent ALERT#. Threshold set by resistor divider
  • AC-adapter detection
  • 11-Bit battery voltage setting
  • 6-Bit charge current/adapter current setting
  • 8A maximum battery charger current
  • 11A maximum adapter current
  • +8V to +22V adapter voltage range
  • Pb-Free (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL88733
Basic Information
生产状态
Mass Production
输入电压最小值 (V)
8
输入电压最大值 (V)
22
输入限流精度 (%)
±4
电池充电电压 (V)
1.024 to 19.2 in 16mV Steps
充电电压精度最大值 (%)
±0.5
电池充电电压调节 (%)
16mV steps
充电限流精度 (%)
±3
涓流充电限流精度 (%)
64mA to 220mA
自动涓流充电典型值 (V)
2.7
电池泄漏电流最大值 (μA)
2 (DCIN=0V, No System Load)
自动电源选择
No (Set by Host)
直流适配器检测
No (Set by Host)
拓扑
Fixed Frequency Synchronous Buck
开关频率典型值 (kHz)
400
最大占空比 (%)
99.6
听觉噪音
No
热关断 (°C)
150 °C
电池化学物品
Multi-Cell Li+/Polymer
资质级别
Standard
输入电压范围 (V)
8 to 22
CAN 采样
YES
温度范围
-10 to +100

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