DATA SHORT
To request the full datasheet, please visit
www.intersil.com/products/isl88733
ISL88733
SMBus Level 2 Battery Charger
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.
FN8347
Rev 0.00
September 25, 2012
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
8
7
MEASURED CURRENT (A)
6
5
4
3
2
1
0
ADAPTER CURRENT
ADAPTER CURRENT
LIMITED BY REDUCING
BATTERY CHARGE
CURRENT
ADAPTER
CURRENT NOT
LIMITED
BATTERY CURRENT
CC = 3.968, AC = 3.072A, CV = 12.592, V
BAT
= 10V
CHARGE
CURRENT
LIMIT
0
1
2
3
4
SYSTEM LOAD CURRENT (A)
5
6
FIGURE 1. ISL88733 CURRENT CONTROL IN 3 MODES
FN8347 Rev 0.00
September 25, 2012
Page 1 of 2
ISL88733
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Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such
modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are
current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its
subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see
www.intersil.com
FN8347 Rev 0.00
September 25, 2012
Page 2 of 2
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