Data Short ISL95521 (Intersil)

DATA SHORT To request the full datasheet, please visit www.intersil.com/products/isl95521 ISL95521 FN8771 Hybrid Power Boost (HPB) and Narrow VDC (NVDC) Configurations Combo Rev 1.00 September 23, 2015 Battery Charger with SMBus Interface The ISL95521 is a highly versatile combo battery charger Features configurable for operating as either a Hybrid Power Boost (HPB) charger or a Narrow VDC (NVDC) charger, supporting 2-, 3- or 4- • Configurable as HPB charger or NVDC charger 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 the adapter capability, referred to as system Turbo mode. The • Adapter current monitor and battery discharging current HPB charger configuration reverse-boosts battery energy to monitor system bus in order to help the adapter provide the system power • Uses NFET for all the switches in Turbo mode. NVDC charger configuration quickly turns on - Supports removal of battery during battery learn mode BGATE to enable the battery to help the adapter provide the - Actively controlled inrush current to prevent FET damage system power in Turbo mode. • SMBus programmable settings and high accuracy The ISL95521 uses N-channel MOSFETs (NFETs) for all the switches to achieve the best performance and lowest BOM cost. • Comprehensive protection features include The internal charge pump is capable of turning on all the NFETs - PROCHOT# indicator for system low voltage, adapter fast or slow depending on the circumstance or the need. The overcurrent, battery overcurrent or system overheating 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 removal of battery in system Turbo The ISL95521 provides many protection features including a mode PROCHOT# indicator for system low voltage, adapter overcurrent, • 16 switching frequency options from 350kHz to 1MHz battery overcurrent or overheating, with an array of SMBus programmable parameters for maximum flexibility. It also • Low quiescent current features hardware based adapter current limit and • SMBus and auto-increment I2C compatible battery-current limit in addition to SMBus programmable limits. • Intersil Robust Ripple Regulator (R3™) modulation scheme The ISL95521 provides a high accuracy adapter current monitor, provides excellent light load efficiency and fast dynamic battery current monitor and system power monitor outputs. To response provide maximum flexibility for working with high power and low • 32 Ld 4x4mm2 QFN package power systems, it provides several configurable current-sense • Pb-free (RoHS compliant) resistor value options to achieve the best trade-off of current sensing accuracy vs power loss. Applications The ISL95521 uses the Intersil patented Robust Ripple Regulator • Devices with rechargeable 2-, 3- or 4-cell batteries (R3™) modulation scheme to provide excellent light load efficiency and fast dynamic response. It is available in a 32 Ld 4x4mm2 QFN package.
VADP AFET SFET AFET SFET VSYS VADP VSYS ADAPTER ADAPTER SYSTEM SYSTEM ASGATE CMSRC BFET ASGATE CMSRC Q1 Q1 UGATE L UGATE L BFET VBAT VBAT PHASE PHASE HPB NVDC CHARGER Q2 CHARGER Q2 LGATE LGATE PROG PROG BGATE BGATE VBAT VBAT
FIGURE 1. HPB CHARGER CONFIGURATION FIGURE 2. NVDC CHARGER CONFIGURATION FN8771 Rev 1.00 Page 1 of 2 September 23, 2015