Overview: DATASHEET To request the full datasheet, please visit the ISL95522 product page. ISL95522
Hybrid Power Boost (HPB) and Narrow VDC (NVDC) bo Battery Charger with SMBus Interface FN8967 Rev.2.00 Jul 9, 2019 The ISL95522 is a highly versatile bination 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 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 the system bus to help the adapter provide the system power in Turbo mode. The NVDC charger configuration quickly turns on BGATE, which enables the battery to help the adapter provide the system power in Turbo mode.
The ISL95522 uses N-channel MOSFETs (NFETs) for all the switches to achieve the best performance and lowest BOM cost. The internal charge pump can turn on all the NFETs quickly or slowly, depending on the circumstance or 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.
