Specification	BQ24705RGET

Battery Chemistry	Multi-Chemistry
Battery Pack Voltage	18 V
Charge Current - Max [Max]	8 A
Current - Charging	Constant - Programmable
Mounting Type	Surface Mount
Number of Cells [Max]	4
Number of Cells [Min]	2 cells
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Package / Case	24-VFQFN Exposed Pad
Supplier Device Package	24-VQFN (4x4)
Voltage - Supply (Max) [Max]	24 V

BQ24705 Series

Part	Charge Current - Max [Max]	Number of Cells [Min]	Number of Cells [Max]	Mounting Type	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Battery Chemistry	Battery Pack Voltage	Voltage - Supply (Max) [Max]	Current - Charging	Package / Case
Texas Instruments BQ24705RGERG4	8 A	2 cells	4	Surface Mount	-40 °C	125 ¯C	24-VQFN (4x4)	Multi-Chemistry	18 V	24 V	Constant - Programmable	24-VFQFN Exposed Pad
Texas Instruments BQ24705RGET	8 A	2 cells	4	Surface Mount	-40 °C	125 ¯C	24-VQFN (4x4)	Multi-Chemistry	18 V	24 V	Constant - Programmable	24-VFQFN Exposed Pad
Texas Instruments BQ24705RGER	8 A	2 cells	4	Surface Mount	-40 °C	125 ¯C	24-VQFN (4x4)	Multi-Chemistry	18 V	24 V	Constant - Programmable	24-VFQFN Exposed Pad

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tape & Reel (TR)	250	$ 9.96
		500	$ 9.31
Texas Instruments	SMALL T&R	1	$ 11.70
		100	$ 9.54
		250	$ 7.50
		1000	$ 6.36

Description

General part information

BQ24705 Series

The bq24705 is a high-efficiency, synchronous battery charger with integrated compensation, offering low component count for space-limited multi-chemistry battery charging applications. Charge current and voltage programming allows high regulation accuracies, and can be either hardwired with resistors, or programmed by the system power-management microcontroller using a DAC or GPIOs.

The bq24705 charges two, three, or four series Li+ cells, supporting up to 8 A of charge current, and is available in a 24-pin, 4x4-mm thin QFN package.

The bq24705 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.

Documents

Technical documentation and resources

Host-Controlled Multi-Chemistry Battery Charger With Low Input Power Detect datasheet (Rev. B)

Data sheet