DATASHEET
ISL9238A FN8978
Rev.0.00
Oct 5, 2017 Buck-Boost Narrow VDC Battery Charger with SMBus Interface and USB OTG
The ISL9238A is a buck-boost Narrow Output Voltage DC
(NVDC) charger. The ISL9238A provides the NVDC charging
function, system bus regulation, and protection features for
tablet, ultrabook, notebook, power bank, and any USB-C
interface platform. Intersil’s advanced R3™ Technology is used
to provide high light-load efficiency and fast transient
response. Features In Charging mode the ISL9238A takes input power from a wide
range of DC power sources (conventional AC/DC charger
adapters, USB PD ports, travel adapters, etc.) and safely charges
battery packs with up to 4-series cell Li-ion batteries. System power monitor PSYS output, IMVP compliant As a NVDC topology charger, it also regulates the system output to
a narrow DC range for stable system bus voltage. The system
power can be provided from the adapter, battery, or a
combination of both. The ISL9238A can operate with only a
battery, only an adapter, or both connected. For Intel IMVP8
compliant systems the ISL9238A includes PSYS (System power
monitor) functionality, which provides an analog signal
representing total platform power. The PSYS output connects to a
wide range of Intersil IMVP8 core regulators to provide an IMVP8
compliant power domain function. PROCHOT# open-drain output, IMVP compliant The ISL9238A supports reverse buck, boost, or buck-boost …