BQ24707中文资料具有独立比较器和高级电路保护的 SMBus 1 至 4 节降压电池充电控制器数据手册TI规格书

描述 Description

The bq24707 and bq24707A devices are high-efficiency, synchronous battery chargers, offering low component count for space-constrained, 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 mm QFN package.

特性 Features

• SMBus Host-Controlled NMOS-NMOS Synchronous Buck Converter With Programmable 615 kHz, 750 kHz, and 885 kHz Switching Frequency
• Enhanced Safety Features for Overvoltage Protection, Overcurrent Protection, Battery, Inductor, and MOSFET Short-Circuit Protection
• ±0.5% Charge Voltage Accuracy up to 19.2 V
• ±3% Input Current Accuracy up to 8.064 A
• Programmable Adapter Detection and Indicator
• Integrated Soft-Start
• AC Adapter Operating Range 5 V to 24 V
• 20-pin 3.5 mm × 3.5 mm QFN Package
• bq24707A: ACOK Delay Default 1.2 ms
• Portable Notebook Computers, UMPCs, Ultra-Thin Notebooks, and Netbooks
• Handheld Terminals
• Portable Equipment

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