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ISL88731_14 Datasheet, PDF (1/22 Pages) Intersil Corporation – SMBus Level 2 Battery Charger | |||
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SMBus Level 2 Battery Charger
ISL88731
The ISL88731 is a highly integrated Lithium-ion battery charger
controller, programmable over the SMBus system management
bus (SMBus). The ISL88731 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 and
system bus boosting prevention. The ISL88731 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 ISL88731 provides 0.5%
end-of-charge battery voltage accuracy.
The ISL88731 provides a digital output that indicates the
presence of the AC adapter as well as an analog output which
indicates the adapter current within 4% accuracy.
The ISL88731 is available in a small 5mmx5mm 28 Ld Thin
(0.8mm) QFN package. An evaluation kit is available to reduce
design time. The ISL88731 is available in Pb-Free packages.
Pin Configuration
ISL88731
(28 LD TQFN)
TOP VIEW
Features
⢠0.5% Battery Voltage Accuracy
⢠3% Adapter Current Limit Accuracy
⢠3% Charge Current Accuracy
⢠SMBus 2-Wire Serial Interface
⢠Battery Short Circuit Protection
⢠Fast Response for Pulse-Charging
⢠Fast System-Load Transient Response
⢠Monitor Outputs
- Adapter Current (3% Accuracy)
- 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 +28V Adapter Voltage Range
⢠Pb-Free (RoHS Compliant)
Applications
⢠Notebook Computers
⢠Tablet PCs
⢠Portable Equipment with Rechargeable Batteries
28 27 26 25 24 23 22
NC 1
21 VDDP
ACIN 2
20 LGATE
VREF 3
19 PGND
ICOMP 4
18 CSOP
NC 5
17 CSON
VCOMP 6
16 NC
NC 7
15 VFB
8 9 10 11 12 13 14
Ordering Information
PART
NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP
RANGE (°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL88731HRZ ISL887 31HRZ -10 to +100 28 Ld 5x5 TQFN L28.5x5B
NOTES:
1. Add â-T*â suffix for tape and reel. Please refer to TB347 for details on reel
specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free
material sets, molding compounds/die attach materials, and 100%
matte tin plate plus anneal (e3 termination finish, which is RoHS
compliant and compatible with both SnPb and Pb-free soldering
operations). Intersil Pb-free products are MSL classified at Pb-free peak
reflow temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page
for ISL88731. For more information on MSL please see techbrief TB363.
June 8, 2011
FN9258.3
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
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