Stand-Alone, Switch-Mode

Li+ Battery Charger with Internal 14V Switch

_______________________________________________________________________________________

7

4.194

4.196

4.195

4.197

4.200

4.201

4.199

4.198

4.202

0

200 300 400 500

100

600 700 800 900 1000

REFERENCE LOAD REGULATION

REFERENCE LOAD (

µA)

1000

0.1

0.1

1

10

TIMEOUT vs. TIMER1 CAPACITANCE

1

CAPACITANCE (nF)

10

100

PREQUALIFICATION MODE

TOP-OFF MODE

VOLTAGE MODE

1000

1

0.1

1

10

FAST-CHARGE TIMEOUT

vs. TIMER2 CAPACITANCE

10

CAPACITANCE (nF)

100

50

60

70

80

90

100

6

8

10

12

14

EFFICIENCY

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

2 CELLS

1 CELL

3.95

4.05

4.00

4.15

4.10

4.25

4.20

4.30

4.40

4.35

4.45

0

1.0 1.5 2.0

0.5

2.5 3.0 3.5 4.0 4.5

VOLTAGE LIMIT

vs. VADJ VOLTAGE

VADJ VOLTAGE (V)

4.185

4.195

4.190

4.205

4.200

4.210

4.215

-40

20

40

-20

0

60

80

100

REFERENCE VOLTAGE

vs. TEMPERATURE

TEMPERATURE (

°C)

Typical Operating Characteristics

unless otherwise noted.)

0

1.0

0.5

2.5

2.0

1.5

4.0

3.5

3.0

4.5

0

0.6

0.8

0.2

0.4

1.0

1.2

1.4

1.6

BATTERY VOLTAGE

vs. CHARGING CURRENT

CHARGING CURRENT (A)

0

0.4

0.2

1.0

0.8

0.6

1.4

1.2

1.6

0

1.5 2.0

0.5 1.0

2.5 3.0 3.5 4.0 4.5

CHARGING CURRENT

vs. ISETOUT VOLTAGE

ISETOUT VOLTAGE (V)

0

20

40

60

80

100

120

01.0

0.5

1.5 2.0 2.5 3.0 3.5 4.0 4.5

INPUT CURRENT-SENSE REGULATION VOLTAGE

vs. ISETIN VOLTAGE

ISETIN VOLTAGE (V)