Specification	BQ27545YZFT-G1

Battery Chemistry	Lithium Ion
Function	Battery Monitor
Interface	HDQ, I2C
Mounting Type	Surface Mount
Number of Cells	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Package / Case	DSBGA, 15-UFBGA
Supplier Device Package	15-DSBGA

BQ27545-G1 Series

Single cell, pack side, Impedance Track™ fuel gauge

Part	Interface	Package / Case	Function	Mounting Type	Number of Cells	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Battery Chemistry
Texas Instruments BQ27545YZFT-G1	HDQ I2C	15-UFBGA DSBGA	Battery Monitor	Surface Mount	1	85 °C	-40 °C	15-DSBGA	Lithium Ion

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	$ 7.45
		10	$ 6.73
		25	$ 6.41
		100	$ 5.57
	Digi-Reel®	1	$ 7.45
		10	$ 6.73
		25	$ 6.41
		100	$ 5.57
	Tape & Reel (TR)	250	$ 3.87
Texas Instruments	SMALL T&R	1	$ 5.70
		100	$ 4.65
		250	$ 3.65
		1000	$ 3.10

Description

General part information

BQ27545-G1 Series

The bq27545-G1 Li-ion battery fuel gauge is a microcontroller peripheral that provides fuel gauging for single-cell Li-Ion battery packs. The device requires little system microcontroller firmware development for accurate battery fuel gauging. The bq27545-G1 resides within the battery pack or on the system’s main-board with an embedded battery (non removable).

The bq27545-G1 uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), run-time to empty (minimum), battery voltage (mV), and temperature (°C). It also provides detections for internal short or tab disconnection events.

The bq27545-G1 also features integrated support for secure battery pack authentication, using the SHA-1/HMAC authentication algorithm.