Описание
The bq24707 and bq24707A are high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications. SMBus controlled input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller. The IC uses the internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current. The IC provides an IFAULT output to alarm if any MOSFET fault or input over current occurs. This alarm output allows users to turn off input power selectors when the fault occurs. Meanwhile, an independent comparator with internal reference is available to monitor input current, output current, or output voltage. The IC charges one, two, three, or four series Li+ cells, and is available in a 20-pin, 3.5×3.5 mm2 QFN package.
Programmable 615kHz, 750kHz, and 885kHz Switching Frequency
Protection, Battery, Inductor, and MOSFET Short Circuit Protection
- ±0.5% Charge Voltage Accuracy up to 19.2V
- ±3% Charge Current Accuracy up to 8.128A
- ±3% Input Current Accuracy up to 8.064A
- ±2% 20x Adapter Current or Charge Current Output Accuracy
- Portable Notebook Computers, UMPC,
Ultra-Thin Notebook, and Netbook - Personal Digital Assistant
- Handheld Terminal
- Industrial and Medical Equipment
- Portable Equipment
