DATA SHORT
To request the full datasheet, please visit www.intersil.com/products/isl95521 ISL95521 FN8771
Rev 1.00
September 23, 2015 Hybrid Power Boost (HPB) and Narrow VDC (NVDC) Configurations Combo
Battery Charger with SMBus Interface
The ISL95521 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 4cell 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.
The ISL95521 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.
The ISL95521 provides many protection features including a
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