4.160

4.165

4.170

4.175

4.180

4.185

4.190

±40

±20

0

20

40

60

80

Temperature (

ƒC)

C005

2.55

2.60

2.65

2.70

2.75

2.80

2.85

2.90

2.95

3.00

3.05

±40

±20

0

20

40

60

80

Temperature (

ƒC)

C003

32.55

32.60

32.65

32.70

32.75

32.80

32.85

±40

±20

0

20

40

60

80

Temperature (

ƒC)

C004

9

bq78350-R1

www.ti.com

SLUSCD0B – AUGUST 2015 – REVISED NOVEMBER 2018

Product Folder Links: bq78350-R1

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Copyright © 2015–2018, Texas Instruments Incorporated

Typical Characteristics (continued)

Figure 4. LED Sink Current

Figure 5. LFO Frequency

Figure 6. HFO Frequency

8 Detailed Description

8.1 Overview

The bq78350-R1 Li-Ion and LiFePO4 Battery Management Controller is the companion to the bq769x0 family of

Analog Front End (AFE) protection devices. This chipset supports 3-series to 15-series cell applications with

capacities up to 320 Ah, and is suitable for a wide range of portable or stationary battery applications. The

bq78350-R1 device provides an accurate fuel gauge and state-of-health (SoH) monitor, as well as the cell

balancing algorithm and a full range of voltage-, current-, and temperature-based protection features.

The battery data that the bq78350-R1 device gathers can be accessed via an SMBus 1.1 interface, and state-of-

charge (SoC) data can be displayed through optional LED or LCD display configurations. Battery history and

diagnostic data are also kept within the device in non-volatile memory and are available over the same SMBus

interface.