ISL88731A
ISL88731A is SMBus Level 2 Battery Charger manufactured by Renesas.
ICM SDA SCL VDDSM B GND ACOK
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 ponents and smaller implementation area. Low offset current-sense amplifiers provide high accuracy with 10m 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
CSSP CSSN VCC BOOT UGATE PHASE DCIN
28 27 26 25 24 23 22
NC 1
21 VDDP
ACIN 2
20 LGATE
VREF 3
19 PGND
IP 4
18 CSOP
NC 5
17 CSON
VP 6
16 NC
NC 7
15 VFB
8 9 10 11 12 13 14
FN6738 Rev 3.00 June 8, 2011
Features
- 0.5% Battery Voltage Accuracy
- 3% Adapter Current Limit Accuracy
- 3% Charge Current Accuracy
- SMBus 2 Wire Serial...
