DATA SHORT
To request the full datasheet, please visit www.intersil.com/products/ISL88739 ISL88739 FN8839
Rev 0.00
April 21, 2016 Hybrid Power Boost (HPB) and Narrow VDC (NVDC) Combo Battery Charger
With SMBus Interface
The ISL88739 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. 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 adapter provide the system power in
Turbo mode.
The ISL88739 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 ISL88739 provides many protection features including
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