DATA SHORT ISL88739B FN8955 Rev.3.00 Hybrid Power Boost (HPB) Battery Charger with SMBus Interface Jul 12, 2019 The ISL88739B is a highly versatile battery charger Features configurable as a Hybrid Power Boost (HPB) charger, Configurable as an HPB charger supporting 2-, 3-, or 4-cell batteries. The configuration Compliant with Intel PROCHOT and PSYS allows the battery to work with the adapter to supply the requirements system load when it exceeds the adapter capability, referred to as Turbo mode. The HPB charger Adapter current monitor and battery discharging configuration reverse-boosts battery energy to the system current monitor bus to help the adapter provide the system power in Uses NFET for all switches Turbo mode. Supports battery removal during Battery Learn The ISL88739B uses N-channel MOSFETs (NFETs) for mode all the switches to achieve the best performance and lowest BOM cost. The internal charge pump can turn on Actively controlled inrush current to prevent FET all the NFETs quickly or slowly, depending on the damage circumstance or the need. The ability to quickly turn on SMBus programmable settings and high accuracy NFETs prevents system bus voltage drop when the Comprehensive protection features: battery is suddenly removed in Turbo mode or in Battery Learn mode. PROCHOT indicator for system low voltage, adapter overcurrent, battery overcurrent, or The ISL88739B provides many protection features system overheating including a PROCHOT indicator for system low voltage, adapter overcurrent, battery overcurrent, or Hardware-based adapter current and battery overheating, with an array of SMBus programmable current limits parameters for maximum flexibility. The ISL88739B Sudden battery removal support in Turbo mode also features hardware-based adapter-current limit and battery-current limit in addition to SMBus programmable 16 switching frequency options from 350kHz to 1MHz limits. Low quiescent current The ISL88739B provides a high accuracy adapter current 2 SMBus and auto-increment I C compatible monitor, battery current monitor, and system power Robust Ripple Regulator (R3) modulation scheme monitor outputs. Several configurable current-sense provides excellent light-load efficiency and fast resistor value options provide maximum flexibility for dynamic response working with high and low power systems, to achieve the best trade-off of current sensing accuracy vs power loss. 32 Ld 4mmx4mm QFN package Related Literature Pb-free (RoHS compliant) For a full list of related documents, visit our website: Applications ISL88739B device page Devices with rechargeable 2-, 3-, or 4-cell batteries AFET SFET VADP VSYS Adapter System BFET ASGATE CMSRC Q 1 UGATE L VBAT PHASE HPB Charger Q 2 LGATE PROG BGATE VBAT Figure 1. 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