MAX745CSLASHD datasheet(4/9 Pages) MAXIM

4 / 9 page

(TA = +25°C, VDCIN = 18V, VBATT = 4.2V, CELL0 = CELL1 = GND, CVL = 4.7μF CREF = 0.1μF. Circuit of Figure 1, unless otherwise

noted.)

MAX745

Switch-Mode Lithium-Ion

Battery-Charger

Maxim Integrated │ 4

www.maximintegrated.com

Typical Operating Characteristics

4.5

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

BATTERY VOLTAGE

vs. CHARGING CURRENT

0.5

3.5

CHARGING CURRENT (A)

2.5

1.5

4.0

3.0

2.0

1.0

R1 = 0.2Ω

R16 = SHORT

R12 = OPEN CIRCUIT

4.205

4.195

REFERENCE VOLTAGE

vs. TEMPERATURE

4.197

4.203

TEMPERATURE (°C)

100

4.201

4.199

4.204

4.196

4.202

4.200

4.198

5.50

VL LOAD REGULATION

5.10

5.40

VL OUTPUT CURRENT (mA)

5.30

5.20

5.45

5.05

5.35

5.25

5.15

200

0.5

1.5

4.0

CURRENT-SENSE VOLTAGE

vs. SETI VOLTAGE

160

SETI VOLTAGE (V)

1.0

2.0 2.5 3.0 3.5

120

180

140

100

R1 = 0.2Ω

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

4.25

4.15

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

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