DATA SHORT
To request the full datasheet, please visit www.intersil.com/products/isl95521a Hybrid Power Boost (HPB) and Narrow VDC (NVDC)
Combo Battery Charger with SMBus Interface
ISL95521A Features The ISL95521A is a highly versatile combo battery charger
configurable for operating as either a Hybrid Power Boost (HPB)
charger or a Narrow VDC (NVDC) charger, supporting 2-, 3-or 4-cell
batteries. Both configurations allow the battery to work with the
adapter together to supply the system load when it exceeds the
adapter capability, referred to as system Turbo mode. The HPB
charger configuration reverse-boosts battery energy to system bus in
order to help the adapter provide the system power in Turbo mode.
NVDC charger configuration quickly turns on BGATE to enable the
battery to help the adapter provide the system power in Turbo mode. Configurable as HPB charger or NVDC charger The ISL95521A uses N-channel MOSFETs (NFETs) for all the
switches to achieve the best performance and lowest BOM cost. The
internal charge pump is capable of turning on all the NFETs fast or
slow 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. Comprehensive protection features include
-PROCHOT# indicator for system low voltage, adapter
overcurrent, battery overcurrent or system overheating
-Hardware-based adapter current and battery current limits
-Supports sudden removal of battery in system Turbo mode The ISL95521A provides many protection features including a …