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ISL88731A_14 Datasheet, PDF (1/23 Pages) Intersil Corporation – SMBus Level 2 Battery Charger | |||
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SMBus Level 2 Battery Charger
ISL88731A
The ISL88731A is a highly integrated Lithium-ion battery
charger controller, programmable over the SMBus system
management bus (SMBus). The ISL88731A 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
ISL88731A 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
ISL88731A provides 0.5% end-of-charge battery voltage
accuracy.
The ISL88731A 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 ISL88731A is available in a small 5mmx5mm 28 Ld thin
(0.8mm) QFN package. An evaluation kit is available to reduce
design time. The ISL88731A is available in Pb-Free packages.
Pin Configuration
ISL88731A
(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
Ordering Information
28 27 26 25 24 23 22
NC 1
21 VDDP
ACIN 2
20 LGATE
VREF 3
19 PGND
ICOMP 4
NC 5
18 CSOP
17 CSON
VCOMP 6
NC 7
16 NC
15 VFB
8 9 10 11 12 13 14
PART
NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP
RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL88731AHRZ ISL887 31AHRZ -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 ISL88731A. For more information on MSL please see
techbrief TB363.
June 8, 2011
FN6738.3
1
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. 2008, 2009, 2011. 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.
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