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ISL88731A Datasheet

  • ISL88731A

  • SMBus Level 2 Battery Charger

  • Intersil   Intersil

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ISL88731A
Data Sheet
July 23, 2008
FN6738.0
SMBus Level 2 Battery Charger
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 10m惟 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.
Features
鈥?0.5% Battery Voltage Accuracy
鈥?3% Adapter Current Limit Accuracy
鈥?3% Charge Current Accuracy
鈥?SMBus 2 Wire Serial Interface
鈥?Battery Short Circuit Protection
鈥?Fast Response for Pulse-Charging
鈥?Fast System-Load Transient Response
鈥?Monitor Outputs
- Adapter Current (3% Accuracy)
- AC-Adapter Detection
鈥?11-Bit Battery Voltage Setting
鈥?6 Bit Charge Current/Adapter Current Setting
鈥?8A Maximum Battery Charger Current
鈥?11A Maximum Adapter Current
鈥?+8V to +28V Adapter Voltage Range
鈥?Pb-Free (RoHS Compliant)
Applications
鈥?Notebook Computers
鈥?Tablet PCs
Pinout
ISL88731A
(28 LD TQFN)
TOP VIEW
PHASE
UGATE
BOOT
CSSN
CSSP
DCIN
VCC
鈥?Portable Equipment with Rechargeable Batteries
Ordering Information
PART
NUMBER
21
20
19
18
17
16
15
VDDP
LGATE
PGND
CSOP
CSON
NC
VFB
28
NC
ACIN
VREF
ICOMP
NC
VCOMP
NC
1
2
3
4
5
6
7
8
ICM
27
26
25
24
23
22
PART
TEMP
MARKING RANGE (擄C)
ISL887
31AHRZ
-10 to +100
-10 to +100
PACKAGE
(Pb-Free)
28 Ld 5x5
TQFN
28 Ld 5x5
TQFN (Tape
and Reel)
PKG.
DWG. #
L28.5x5B
L28.5x5B
ISL88731AHRZ
(Note)
ISL88731AHRZ-T ISL887
(Note)
31AHRZ
9
SDA
10
SCL
11
VDDSMB
12
GND
13
ACOK
14
NC
Please refer to TB347 for details on reel specifications.
NOTE: 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.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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