Multi-Cell Synchronous Switch-mode Battery Charger

The BQ24740 is a high-efficiency, synchronous Battery Charger with integrated compensation and system power selector Logic offering low component count for space-constrained multi-chemistry battery charging applications. Ratiometric charge current and voltage programming allows very high regulation accuracies, and CAN be either hardwired with resistors or programmed by the system power-management Microcontroller using a DAC or GPIOs.
The BQ24740 charges two, three, or four series Li+ cells, supporting up to 10 A of charge current, and is available in a 28-pin, 5x5-mm thin QFN package.
The BQ24740 features Dynamic Power Management (DPM) and input power limiting. These features reduce battery charge current when the input power limit is reached to avoid overloading the AC adapter when supplying the load and the Battery Charger simultaneously. A highly-accurate current-sense Amplifier enables precise measurement of input current from the AC adapter to monitor the overall system power. If the adapter current is above the programmed low-power threshold, a signal is sent to host so that the system optimizes its power performance according to what is available from the adapter.
By Texas Instruments
BQ24740 's PackagesBQ24740 's pdf datasheet
BQ24740RHDR QFN
BQ24740RHDRG4 QFN
BQ24740RHDT QFN
BQ24740RHDTG4 QFN




BQ24740 Pinout, Pinouts
BQ24740 pinout,Pin out
This is one package pinout of BQ24740,If you need more pinouts please download BQ24740's pdf datasheet.

BQ24740 Application circuits
BQ24740 circuits
This is one application circuit of BQ24740,If you need more circuits,please download BQ24740's pdf datasheet.


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