Switch-Mode Lithium-Ion

Battery Charger

4

_______________________________________________________________________________________

4.5

0

0

0.1 0.2

0.4

1.0

BATTERY VOLTAGE

vs. CHARGING CURRENT

1.0

4.0

CHARGING CURRENT (A)

0.3

0.5 0.6 0.7 0.8 0.9

3.0

2.0

0.5

3.5

2.5

1.5

R1 = 0.2

Ω

R16 = SHORT

R12 = OPEN CIRCUIT

200

0

0

0.5

1.5

4.0

CURRENT-SENSE VOLTAGE

vs. SETI VOLTAGE

40

160

SETI VOLTAGE (V)

1.0

2.0

2.5

3.0

3.5

120

80

180

20

140

100

60

R1 = 0.2

Ω

4.45

3.95

0

0.5 1.0

2.0

4.5

VOLTAGE LIMIT

vs. VADJ VOLTAGE

4.05

4.35

VADJ VOLTAGE (V)

1.5

2.5 3.0 3.5 4.0

4.25

4.15

4.40

4.00

4.30

4.20

4.10

4.205

4.195

025

50

REFERENCE VOLTAGE

vs. TEMPERATURE

4.197

4.203

TEMPERATURE (°C)

75

100

4.201

4.199

4.204

4.196

4.202

4.200

4.198

__________________________________________Typical Operating Characteristics

otherwise noted.)

5.50

0

0

5

10

25

VL LOAD REGULATION

5.10

5.40

VL OUTPUT CURRENT (mA)

15

20

5.30

5.20

5.45

5.05

5.35

5.25

5.15

4.25

4.15

0

500

1000

3000

REFERENCE LOAD REGULATION

4.17

4.23

REFERENCE CURRENT (

µA)

1500

2000

2500

4.21

4.19

4.24

4.16

4.22

4.20

4.18