BQ25070_15 datasheet(6/21 Pages) TI

Part #	BQ25070

Description	1A, Single-Input, Single-Cell LiFePO4 Linear Battery Charger with 50mA LDO

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Manufacturer	TI [Texas Instruments]

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6 / 21 page

0:00:00

1:12:00

2:24:00

3:36:00

4:48:00

0

0.5

1

1.5

2

2.5

3

3.5

4

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

Elapsed Time (hh:mm:ss)

VBAT

VCHG

IBAT

G006

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3

1.4

1.5

0

25

50

75

100

125

Temperature (°C)

VIN = 4.5V

IOUT = 1A

G007

3.45

3.46

3.47

3.48

3.49

3.5

3.51

3.52

3.53

3.54

3.55

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

Charge Current (A)

G008

10.4

10.42

10.44

10.46

10.48

10.5

10.52

10.54

10.56

10.58

10.6

0

25

50

75

100

125

Temperature (°C)

G009

0.4

0.45

0.5

0.55

0.6

0.65

0.7

0.75

0.8

0.85

0.9

0.95

1

1.05

1.1

5

6

7

8

9

10

Input Voltage (V)

Thermal

Regulation

G010

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

2.5

2.75

3

3.25

3.5

Battery Voltage (V)

100mA Current Limit

500mA Current Limit

VIN = 5V

G011

bq25070

SLUSA66

– JULY 2011

www.ti.com

TYPICAL CHARACTERISTICS (continued)

VIN = 5 V, VBAT = 3.2 V, ICHG = 280 mA, Typical Application Circuit

VOLTAGE and CURRENT

DROPOUT VOLTAGE

vs

ELAPSED TIME

TEMPERATURE

Figure 6. Complete Charge Cycle

Figure 7.

BATTERY REGULATION VOLTAGE

OVP THRESHOLD

vs

CHARGE CURRENT

TEMPERATURE

Figure 8.

Figure 9.

CHARGE CURRENT

INPUT CURRENT LIMIT

vs

INPUT VOLTAGE

BATTERY VOLTAGE

Figure 10.

Figure 11.

6

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