Описание
The ISL88732 is a highly integrated Lithium-ion battery charger controller, programmable over the SMBus system management bus (SMBus). The ISL88732 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 ISL88732 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 sense resistors. The provide high accuracy with 10m ISL88732 provides 0.5% end-of-charge battery voltage accuracy. The ISL88732 is available in a small 5mmx5mm 28 Ld Thin (0.8mm) QFN package.
- Boost Mode to support Intel “Turbo Mode”
- Pin compatible with ISL88731
- Over-temp and over current 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
- Turbo-boost discharge current limit can be set to 3.3x, 4.85x, 6.37x or 9.31x the charge current limit by SMBus command
- Monitor outputs
- Adapter current (3% accuracy)
- Adapter over current 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)
