FN8967 Rev.2.00 Page 1 of 3
Jul 9, 2019
FN8967
Rev.2.00
Jul 9, 2019
ISL95522
Hybrid Power Boost (HPB) and Narrow VDC (NVDC) Combo Battery Charger
with SMBus Interface
DATASHEET
To request the full datasheet, please visit the ISL95522 product page.
The ISL95522 is a highly versatile combination 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.
The ISL95522 provides many protection features,
including a PROCHOT# indicator for system low
voltage, adapter overcurrent, battery overcurrent, or
overheating, with an array of SMBus programmable
parameters for maximum flexibility. It also features a
hardware-based adapter-current limit and battery-current
limit in addition to SMBus programmable limits.
The ISL95522 provides a high accuracy adapter current
monitor, battery current monitor, and system power
monitor outputs. To provide maximum flexibility for
working with high and low power systems, it provides
several configurable current-sense resistor value options
to achieve the best trade-off of current sensing accuracy
vs power loss.
The ISL95522 uses the Renesas Robust Ripple Regulator
(R3™) modulation scheme to provide excellent
light-load efficiency and fast dynamic response. The
ISL95522 is available in a 32 Ld 4x4mm2 QFN package.
Features
• Configurable as an HPB charger or NVDC charger
• Compliant with Intel PROCHOT# and PSYS
requirements
• Adapter current monitor and battery discharging
current monitor
• Uses NFET for all the switches
• Supports battery removal during Battery Learn
mode
• Actively controlled inrush current to prevent FET
damage
• SMBus programmable settings and high accuracy
• 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 battery removal in system Turbo
mode
• 16 switching frequency options from 350kHz to 1MHz
• Low quiescent current
• SMBus and auto-increment I2C compatible
• Renesas Robust Ripple Regulator (R3) modulation
scheme provides excellent light-load efficiency and
fast dynamic response
• 32 Ld 4x4mm2 QFN package
• Pb-free (RoHS compliant)
Applications
• Devices with rechargeable 2-, 3-, or 4-cell batteries
Related Literature
For a full list of related documents, visit our website
•ISL95522 device page
FN8967 Rev.2.00 Page 2 of 3
Jul 9, 2019
ISL95522
Figure 1. HPB Charger Configuration
Figure 2. NVDC Charger Configuration
L
Adapter
System
BGATE
LGATE
PHASE
UGATE
VADP VSYS
VBAT
BFET
HPB Charger
CMSRCASGATE
VBAT
AFET SFET
Q1
Q2
PROG
L
Adapter
BGATE
LGATE
PHASE
UGATE
VADP VSYS
VBAT
BFET
NVDC Charger
CMSRCASGATE
VBAT
AFET SFET
Q1
Q2
PROG
System
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