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DATA SHORT
To request the full datasheet, please visit www.intersil.com/products/ISL88750
Narrow VDC (NVDC) Battery Charger with SMBus
Interface
ISL88750
The ISL88750 is a highly versatile Narrow VDC (NVDC) battery
charger, supporting 2-, 3- or 4-cell batteries. It allows 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. ISL88750 quickly turns on BGATE to
enable the battery to help the adapter provide the system
power in Turbo mode.
The ISL88750 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 ISL88750 features hardware based adapter current limit
and battery-current limit in addition to SMBus programmable
limits.
The ISL88750 provides a high accuracy adapter current
monitor and battery discharging current monitor outputs. To
provide maximum flexibility for working with high power 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 ISL88750 uses the Intersil patented Robust Ripple
Regulator (R3™) modulation scheme to provide excellent
light-load efficiency and fast dynamic response. It is available
in a 32 Ld 4x4mm
2
QFN package.
Features
• Adapter current monitor and battery discharging current
monitor
• Uses NFET for all the switches
- Supports removal of battery during Battery Learn mode
- Actively controlled inrush current to prevent FET damage
• SMBus programmable settings and high accuracy
• Comprehensive protection features include
- Hardware-based adapter current and battery current
limits
- Supports sudden removal of battery in system Turbo
mode
• 16 switching frequency options from 350kHz to 1MHz
•Low quiescent current
• SMBus and auto-increment I
2
C compatible
• Intersil Robust Ripple Regulator (R3™) modulation scheme
provides excellent light-load efficiency and fast dynamic
response
• 32 Ld 4x4mm
2
QFN package
• Pb-free (RoHS compliant)
Applications
• Devices with rechargeable 2-, 3- or 4-cell batteries
FIGURE 1. TYPICAL CONFIGURATION
L
ADAPTER
BGATE
LGATE
PHASE
UGATE
VADP
VSYS
VBAT
BFET
NVDC
CHARGER
CMSRCASGATE
VBAT
AFET SFET
Q1
Q2
PROG
SYSTEM
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Copyright Intersil Americas LLC 2016. All Rights Reserved
Intersil (and design) and R3 technology are trademarks owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
April 22, 2016
FN8840.0
