DATA SHORT To request the full datasheet, visit the ISL95521A device page. ISL95521A FN8841 Rev 2.00 Hybrid Power Boost (HPB) and Narrow VDC (NVDC) Combo Battery Charger with Jul.19.19 SMBus Interface The ISL95521A is a highly versatile combo battery charger Features configurable for operating as either a Hybrid Power Boost (HPB) Configurable as HPB charger or NVDC charger charger or a Narrow VDC (NVDC) charger, supporting 2-, 3-, or 4-cell batteries. Both configurations allow the battery to work with Compliant with Intel PROCHOT and PSYS requirements the adapter together to supply the system load when it exceeds Adapter current monitor and battery discharging current the adapter capability, referred to as system Turbo mode. The monitor HPB charger configuration reverse-boosts battery energy to the Uses NFET for all the switches system bus to help the adapter provide the system power in Turbo mode. The NVDC charger configuration quickly turns on BGATE to - Supports battery removal during Battery Learn mode enable the battery to help the adapter provide the system power - Actively controlled inrush current to prevent FET damage in Turbo mode. SMBus programmable settings and high accuracy The ISL95521A uses N-channel MOSFETs (NFETs) for all the Comprehensive protection features: switches to achieve the best performance and lowest BOM cost. - PROCHOT indicator for system low voltage, adapter The internal charge pump is capable of turning on all the NFETs overcurrent, battery overcurrent, and system overheating fast or slow depending on the circumstance or the need. The ability to quickly turn on NFETs prevents system bus voltage drop - Hardware-based adapter current and battery current when the battery is suddenly removed in Turbo mode or in Battery limits Learn mode. - Supports sudden battery removal in system Turbo mode The ISL95521A provides many protection features including a 16 switching frequency options from 350kHz to 1MHz PROCHOT indicator for system low voltage, adapter overcurrent, Low quiescent current battery overcurrent or overheating, with an array of SMBus 2 SMBus and auto-increment I C compatible programmable parameters for maximum flexibility. It also features hardware based adapter current limit and Robust Ripple Regulator (R3) modulation scheme provides battery-current limit in addition to SMBus programmable limits. excellent light-load efficiency and fast dynamic response 2 The ISL95521A provides a high accuracy adapter current 32 Ld 4x4mm QFN package monitor, battery current monitor, and system power monitor Pb-free (RoHS compliant) outputs. To provide maximum flexibility for working with high power and low power systems, the ISL95521A provides Applications several configurable current-sense resistor value options to Devices with rechargeable 2-, 3-, or 4-cell batteries achieve the best trade-off of current sensing accuracy vs power loss. Related Literature The ISL95521A uses the Renesas Robust Ripple Regulator (R3) For a full list of related documents, visit our website: modulation scheme to provide excellent light-load efficiency and fast dynamic response. The ISL95521A is available in a 32 Ld ISL95521A device page 2 4x4mm QFN package. AFET SFET AFET SFET VADP VADP VSYS VSYS ADAPTER ADAPTER SYSTEM SYSTEM BFET ASGATE CMSRC ASGATE CMSRC Q Q 1 1 UGATE UGATE L L BFET VBAT VBAT PHASE PHASE NVDC HPB CHARGER CHARGER Q Q2 2 LGATE LGATE PROG PROG BGATE BGATE VBAT VBAT FIGURE 1. HPB CHARGER CONFIGURATION FIGURE 2. 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