ISL88739B

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Hybrid Power Boost (HPB) Battery Charger with SMBus Interface

Product Status: Mass Production

OVERVIEW

The ISL88739B is a highly versatile battery charger configurable as a Hybrid Power Boost (HPB) charger, supporting 2-, 3-, or 4-cell batteries. The configuration allows the battery to work with the adapter to supply the system load when it exceeds the adapter capability, referred to as Turbo mode. The HPB charger configuration reverse-boosts battery energy to the system bus to help the adapter provide the system power in Turbo mode.


The ISL88739B uses N-channel MOSFETs (NFETs) for all the switches to achieve the best performance and lowest BOM cost. The internal charge pump can turn on all the NFETs quickly or slowly, 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 ISL88739B provides many protection features including a PROCHOT# indicator for system low voltage, adapter overcurrent, battery overcurrent, or overheating, with an array of SMBus programmable parameters for maximum flexibility. The ISL88739B also features hardware-based adapter-current limit and battery-current limit in addition to SMBus programmable limits.

The ISL88739B provides a high accuracy adapter current monitor, battery current monitor, and system power monitor outputs. Several configurable current-sense resistor value options provide maximum flexibility for working with high and low power systems, to achieve the best trade-off of current sensing accuracy vs power loss.

KEY FEATURES

    • Configurable as an HPB charger
    • Compliant with Intel PROCHOT# and PSYS requirements
    • Adapter current monitor and battery discharging current monitor
    • Uses NFET for all switches
      • Supports battery removal during Battery Learn mode
      • Actively controlled inrush current to prevent FET damage
    • SMBus programmable settings and high accuracy
    • Comprehensive protection features:
      • PROCHOT# indicator for system low voltage, adapter overcurrent, battery overcurrent, or system overheating
      • Hardware-based adapter current and battery current limits
      • Sudden battery removal support in Turbo mode
    • 16 switching frequency options from 350kHz to 1MHz
    • Low quiescent current
    • SMBus and auto-increment I2C compatible
    • Robust Ripple Regulator (R3™) modulation scheme provides excellent light-load efficiency and fast dynamic response
    • 32 Ld 4 mmx 4mm QFN package
    • Pb-free (RoHS compliant)

PARAMETRICS

Parameters
ISL88739B
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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