Data Short ISL88739B (Intersil)

DATA SHORT To request the full datasheet, please visit www.intersil.com/products/isl88739b ISL88739B FN8955 Hybrid Power Boost (HPB) Battery Charger with SMBus Interface Rev.0.00 Sep 7, 2017 The ISL88739B is a highly versatile battery charger
Features
configurable as a Hybrid Power Boost (HPB) charger, • Configurable as HPB charger supporting 2-, 3-, or 4-cell batteries. The configuration allows the battery to work with the adapter to supply the • Compliant with Intel PROCHOT# and PSYS system load when it exceeds the adapter capability, requirements referred to as system 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 Turbo mode. • Uses NFET for all the switches The ISL88739B uses N-channel MOSFETs (NFETs) for • Supports battery removal during Battery Learn all the switches to achieve the best performance and mode lowest BOM cost. The internal charge pump is capable of • Actively controlled inrush current to prevent FET turning on all the NFETs quickly or slowly, depending on damage the circumstance or the need. The ability to quickly turn • SMBus programmable settings and high accuracy on NFETs prevents system bus voltage drop when the battery is suddenly removed in Turbo mode or in Battery • Comprehensive protection features include Learn mode. • PROCHOT# indicator for system low voltage, The ISL88739B provides many protection features adapter overcurrent, battery overcurrent, or including a PROCHOT# indicator for system low system overheating 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. It also features hardware-based adapter-current limit and battery-current • Sudden battery removal support in system Turbo limit in addition to SMBus programmable limits. mode The ISL88739B provides a high accuracy adapter current • 16 switching frequency options from 350kHz to 1MHz monitor, battery current monitor, and system power • Low quiescent current monitor outputs. Several configurable current-sense • SMBus and auto-increment I2C compatible resistor value options provide maximum flexibility for working with high and low power systems, to achieve the • Intersil Robust Ripple Regulator (R3) modulation best trade-off of current sensing accuracy vs power loss. scheme provides excellent light-load efficiency and fast dynamic response The ISL88739B uses Intersil’s Robust Ripple Regulator (R3™) modulation scheme to provide excellent light-load • 32 Ld 4x4mm2 QFN package efficiency and fast dynamic response. It is available in a • Pb-free (RoHS compliant) 32 Ld 4x4mm2 QFN package.
Applications
• Devices with rechargeable 2-, 3-, or 4-cell batteries
VADP AFET SFET VSYS ADAPTER SYSTEM ASGATE CMSRC BFET UGATE Q1 L VBAT PHASE HPB CHARGER LGATE Q2 PROG BGATE VBAT Figure 1. HPB Charger Configuration
FN8955 Rev.0.00 Page 1 of 2 Sep 7, 2017