Specification	BQ24170RGYT

Battery Chemistry	Lithium Ion/Polymer
Battery Pack Voltage	4.2 V
Charge Current - Max [Max]	4 A
Current - Charging	Constant - Programmable
Fault Protection	Over Voltage, Over Current, Over Temperature
Mounting Type	Surface Mount
Number of Cells [Max]	3 cells
Number of Cells [Min]	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Package / Case	24-VFQFN Exposed Pad
Programmable Features	Current
Supplier Device Package	24-VQFN
Supplier Device Package [x]	5.5
Supplier Device Package [y]	3.5
Voltage - Supply (Max) [Max]	17 V

BQ24170 Series

Standalone 1-3 cell 4A synchronous Buck battery charger with Power Path selector

Part	Function	Utilized IC / Part	Secondary Attributes [Max]	Secondary Attributes [Min]	Embedded	Supplied Contents	Type	Primary Attributes	Primary Attributes [Min]	Primary Attributes [Max]	Mounting Type	Battery Pack Voltage	Package / Case	Battery Chemistry	Voltage - Supply (Max) [Max]	Current - Charging	Operating Temperature [Max]	Operating Temperature [Min]	Charge Current - Max [Max]	Programmable Features	Fault Protection	Supplier Device Package [y]	Supplier Device Package	Supplier Device Package [x]	Number of Cells [Min]	Number of Cells [Max]
Texas Instruments BQ24170EVM-610-15V	Battery Charger	BQ24170	16 V	4.5 V		Board(s)	Power Management	Li-Ion Li-Pol	1 Cells	3 Cells
Texas Instruments BQ24170RGYT											Surface Mount	4.2 V	24-VFQFN Exposed Pad	Lithium Ion/Polymer	17 V	Constant - Programmable	85 °C	-40 °C	4 A	Current	Over Current Over Temperature Over Voltage	3.5	24-VQFN	5.5	1	3 cells

Pricing

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

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 5.57
		10	$ 5.00
		25	$ 4.73
		100	$ 4.10
	Digi-Reel®	1	$ 5.57
		10	$ 5.00
		25	$ 4.73
		100	$ 4.10
	Tape & Reel (TR)	250	$ 3.89
		500	$ 3.49
		1250	$ 2.94
		2500	$ 2.80
Texas Instruments	SMALL T&R	1	$ 4.20
		100	$ 3.68
		250	$ 2.58
		1000	$ 2.08

Description

General part information

BQ24170 Series

The bq2417x device is a highly integrated stand-alone Li-Ion and Li-Polymer switched-mode battery charger with two integrated N-channel power MOSFETs. The device offers a constant-frequency synchronous PWM controller with high-accuracy regulation of input current, charge current, and voltage. The bq2417x closely monitors the battery pack temperature to allow charge only in a preset temperature window. The bq24170 charges one, two, or three cells (selected by CELL pin), and the bq24172 is adjustable for up to three series Li+ cells.

The device charges the battery in three phases: precondictioning, constant current, and constant voltage.

Charge is terminated when the current reaches 10% of the fast charge rate. A programmable charge timer offers a safety backup. The bq2417x automatically restarts the charge cycle if the battery voltage falls below an internal threshold, and enters a low-quiescent current sleep mode when the input voltage falls below the battery voltage.

Documents

Technical documentation and resources

bq24170EVM Evaluation Module

User guide

BQ241xx/BQ246xx Selection of Multi-Cell Standalone Switching Battery Chargers

Application note

bq2417x 1.6-MHz Synchronous Switched-Mode Li-Ion and Li-Polymer Stand-Alone Battery Charger With Integrated MOSFETs and Power Path Selector datasheet (Rev. C)

Data sheet