BQ25302 datasheet(11/38 Pages) TI

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7.7 Typical Characteristics

fSW = 1.2 MHz

Inductance 1 uH

VBUS = 5 V

Inductor DCR = 14.6 mΩ

Figure 7-1. Battery Charge Efficiency vs. Charge Current

Junction Temperature (oC)

-40

-20

100

120

140

3.9

4.1

4.2

4.3

4.4

4.5

Copy

VBATREG = 4.1V

VBATREG = 4.2V

VBATREG = 4.35V

VBATREG = 4.4V

Figure 7-2. Battery Charge Regulation Voltage vs. Junction

Temperature

Junction Temperature (oC)

-40

-20

100

120

140

3.9

4.1

4.2

4.3

4.4

VIND

VINDPM = 4.1V

VINDPM = 4.3V

Figure 7-3. VINDPM vs. Junction Temperature

Junction Temperature (oC)

-40

-20

100

120

140

0.25

0.5

0.75

1.25

1.5

1.75

ICHG

Charge Current = 1.72A

Charge Current = 1A

Charge Current = 0.52A

Figure 7-4. Charge Current vs. Junction Temperature

RICHG (k:)

100

120

140

160

180

200

0.2

0.4

0.6

0.8

1.2

1.4

1.6

1.8

RICH

Figure 7-5. Charge Current vs. Charge Current Setting

Resistance RICHG

Charge Current (A)

0.2

0.4

0.6

0.8

1.2

1.4

1.6

1.8

2.2

40000

40200

40400

40600

40800

41000

41200

KICH

Figure 7-6. KICHG vs. Charge Current

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BQ25302

SLUSCZ3 – OCTOBER 2020

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