DATA SHORT
To request the full datasheet, visit the ISL95520 product page.
ISL95520
FN8694
Rev 1.00
Jul 29, 2019
Hybrid Power Boost (HPB) and Narrow VDC (NVDC) Configurations Combo
Battery Charger With SMBus Interface
The ISL95520 is a highly versatile combo battery charger
Features
configurable for operating as either a Hybrid Power Boost
• Configurable as an HPB charger or NVDC charger
(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 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 the system bus to help the adapter provide system
power in Turbo mode. The NVDC charger configuration quickly
turns on BGATE to enable the battery to help the adapter
provide system power in Turbo mode.
• Compliant with Intel PROCHOT# and PSYS requirements
• Adapter current monitor and battery discharging current
monitor
• Uses NFETs 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:
The ISL95520 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.
- PROCHOT# indicator for system low voltage, adapter
overcurrent, battery overcurrent, and system overheating
- Hardware-based adapter-current and battery-current
limits
- Supports sudden battery removal in system Turbo mode
The ISL95520 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.
The ISL95520 also features hardware based adapter current
limit and battery-current limit in addition to SMBus
programmable limits.
• 16 switching frequency options from 350kHz to 1MHz
• Low quiescent current
• Robust Ripple Regulator (R3) modulation scheme provides
excellent light-load efficiency and fast dynamic response
2
• 32 Ld 4x4mm QFN package
• Pb-free (RoHS compliant)
The ISL95520 provides high accuracy adapter current monitor,
battery current monitor, and system power monitor outputs. To
provide maximum flexibility for working with high power and
low power systems, the ISL95520 provides several
Applications
• Devices with rechargeable 2-, 3- or 4-cell batteries
configurable current-sense resistor value options to achieve
the best trade-off of current sensing accuracy vs power loss.
The ISL95520 uses the Renesas patented Robust Ripple
Regulator (R3™) modulation scheme to provide excellent
light-load efficiency and fast dynamic response. The ISL95520
2
is available in a 32 Ld 4x4mm QFN package.
Related Literature
For a full list of related documents, visit our website:
• ISL95520 device page
AFET
SFET
AFET
SFET
VADP
VADP
VSYS
SYSTEM
VSYS
SYSTEM
ADAPTER
ADAPTER
ASGATE CMSRC
UGATE
BFET
ASGATE CMSRC
UGATE
Q1
Q2
Q1
Q2
L
L
BFET
VBAT
VBAT
PHASE
LGATE
PHASE
LGATE
HPB
CHARGER
NVDC
CHARGER
PROG
PROG
BGATE
VBAT
BGATE
VBAT
FIGURE 1. HPB CHARGER CONFIGURATION
FIGURE 2. NVDC CHARGER CONFIGURATION
FN8694 Rev 1.00
Jul 29, 2019
Page 1 of 2
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