ISL88750

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Narrow VDC (NVDC) Battery Charger with SMBus Interface

Product Status: Mass Production

OVERVIEW

The ISL88750 is a highly versatile Narrow VDC (NVDC) battery charger, supporting 2-, 3- or 4-cell batteries. It allows the battery to work with the adapter together to supply the system load when it exceeds the adapter capability, referred to as system Turbo mode. ISL88750 quickly turns on BGATE to enable the battery to help the adapter provide the system power in Turbo mode.

The ISL88750 uses N-channel MOSFETs (NFETs) for all the switches to achieve the best performance and lowest BOM cost. The internal charge pump is capable of turning on all the NFETs fast or slow depending on the circumstance or the need. The ability to quickly turn on NFETs prevents system bus voltage drop when the battery is suddenly removed in Turbo mode or in Battery Learn mode.

The ISL88750 features hardware based adapter current limit and battery-current limit in addition to SMBus programmable limits.

The ISL88750 provides a high accuracy adapter current monitor and battery discharging current monitor outputs. To provide maximum flexibility for working with high power and low power systems, it provides several configurable current-sense resistor value options to achieve the best trade-off of current sensing accuracy vs power loss.

The ISL88750 uses the Renesas patented Robust Ripple Regulator (R3™) modulation scheme to provide excellent light-load efficiency and fast dynamic response. It is available in a 32 Ld 4x4mm2 QFN package.

KEY FEATURES

  • Adapter current monitor and battery discharging current monitor
  • Uses NFET for all the switches
    • Supports removal of battery during Battery Learn mode
    • Actively controlled inrush current to prevent FET damage
  • SMBus programmable settings and high accuracy
  • Comprehensive protection features include
    • Hardware-based adapter current and battery current limits
    • Supports sudden removal of battery in system Turbo mode
  • 16 switching frequency options from 350kHz to 1MHz
  • Low quiescent current
  • SMBus and auto-increment I2C compatible
  • Renesas Robust Ripple Regulator (R3™) modulation scheme provides excellent light-load efficiency and fast dynamic response
  • 32 Ld 4x4mm2 QFN package
  • Pb-free (RoHS compliant)
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    APPLICATIONS

  • Devices with rechargeable 2-, 3- or 4-cell batteries

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL88750
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 (%)
±3
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
0 to +70

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