Temperature (qC)

-60

-40

-20

0

20

40

60

80

100

64.8

65

65.2

65.4

65.6

65.8

66

D003

Min

Nom

Max

Temperature (qC)

-60

-40

-20

0

20

40

60

80

100

-10

-5

0

5

10

15

20

D004

Min

Nom

Max

Temperature (qC)

-60

-40

-20

0

20

40

60

80

100

1.2

1.202

1.204

1.206

1.208

1.21

D001

Min

Nom

Max

Temperature (qC)

-60

-40

-20

0

20

40

60

80

100

1.78

1.785

1.79

1.795

1.8

D002

Min

Nom

Max

10

BQ27Z561-R1

SLUSDH5 – MARCH 2019

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Copyright © 2019, Texas Instruments Incorporated

7.20 Typical Characteristics

BAT Min = 2 V

BAT Nom = 3.6 V

BAT Max = 5 V

Figure 3. REF1 Voltage Versus Battery and Temperature

BAT Min = 2 V

BAT Nom = 3.6 V

BAT Max = 5 V

Figure 4. LDO Voltage Versus Battery and Temperature

BAT Min = 2 V

BAT Nom = 3.6 V

BAT Max = 5 V

Figure 5. LFO Frequency Versus Battery and Temperature

BAT Min = 2 V

BAT Nom = 3.6 V

BAT Max = 5 V

Figure 6. ADVC Offset Voltage Versus Battery and

Temperature

8 Detailed Description

8.1 Overview

The BQ27Z561-R1 gas gauge is a fully integrated battery manager that employs flash-based firmware to provide

a complete solution for battery-stack architectures composed of 1-series cells. The BQ27Z561-R1 device

enable support for a sense resistor down to 1 mΩ, and simultaneous current/voltage data conversion for instant

power calculations. The following sections detail all of the major component blocks included as part of the

BQ27Z561-R1 device.