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DATASHEET
To request the full datasheet, please visit www.intersil.com/products/isl88733
SMBus Level 2 Battery Charger
ISL88733
The ISL88733 is a highly integrated Lithium-ion battery charger
controller, programmable over the SMBus system management
bus (SMBus). The ISL88733 is intended to be used in a smart
battery charger (SBC) within a smart battery system (SBS) that
throttles the charge power such that the current from the
AC-adapter is automatically limited. High efficiency is achieved
with a DC/DC synchronous-rectifier buck converter, equipped
with diode emulation for enhanced light load efficiency. The
ISL88733 charges one to four Lithium-ion series cells, and
delivers up to 8A charge current. Integrated MOSFET drivers
and bootstrap diode result in fewer components and smaller
implementation area. Low offset current-sense amplifiers
provide high accuracy with 10mΩ sense resistors. The
ISL88733 provides 0.5% end-of-charge battery voltage
accuracy.
The ISL88733 is available in a small 5mmx5mm 28 Ld Thin
(0.8mm) QFN package.
Features
• Pin compatible with ISL88731
• Over-temp and overcurrent protection
• 0.5% battery voltage accuracy
• 4% adapter current limit accuracy
• 3% charge current accuracy
• SMBus 2-wire serial interface
• Charge current limited by SMBus DAC OR analog voltage at
the CCLIM pin
• Monitor outputs
- Adapter current (3% Accuracy)
- Adapter overcurrent ALERT#. Threshold set by resistor divider
- AC-adapter detection
• 11-Bit battery voltage setting
• 6-Bit charge current/adapter current setting
• 8A maximum battery charger current
• 11A maximum adapter current
• +8V to +22V adapter voltage range
• Pb-Free (RoHS compliant)
Applications
• Notebook computers
•Tablet PCs
Typical Operating Performance
FIGURE 1. ISL88733 CURRENT CONTROL IN 3 MODES
0
1
2
3
4
5
6
7
8
0 1 2 3 4 5 6
MEASURED CURRENT (A)
SYSTEM LOAD CURRENT (A)
CC = 3.968, AC = 3.072A, CV = 12.592, V
BAT
= 10V
BATTERY CURRENT
ADAPTER CURRENT
CHARGE
CURRENT
LIMIT
ADAPTER
CURRENT NOT
LIMITED
ADAPTER CURRENT
LIMITED BY REDUCING
BATTERY CHARGE
CURRENT
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Copyright Intersil Americas Inc. 2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
September 25, 2012
FN8347.0
