MB3879 データシートの表示（PDF） - Fujitsu

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MB3879

DC/DC Converter IC for Parallel Charging of 3/4 cell Li-ion & NiMH Batteries

Fujitsu 

MB3879

Reference voltage vs. Power supply voltage

6

5

4

3

2

1

Ta = +25 °C

CTL = 5 V

VB = 0 mA

0

0

5

10

15

20

25

Power supply voltage VCC (V)

Reference voltage vs. Ambient temperature

5.10

5.08

5.06

5.04

5.02

5.00

4.98

4.96

4.94

4.92

4.90

−40 −20 0

VCC = 19 V

CTL = 5 V

VB = 0 mA

20 40 60 80 100

Ambient temperature Ta ( °C)

Triangular oscillation frequency vs.

Timing capacitor

1M

Ta = +25 °C

VCC = 19 V

CTL = 5 V

Reference voltage vs. Load current

6

Ta = +25 °C

5

VCC = 19 V

CTL = 5 V

4

3

2

1

0

0

5

10

15

20

25

30

Load current IB (mA)

CTL terminal current and reference voltage

vs. CTL terminal voltage

500

10

450 Ta = +25 °C

9

VCC = 19 V

400

8

350

7

ICT

300

6

250

VB

5

200

4

150

3

100

2

50

1

0

0

0

5

10

15

20

25

CTL terminal voltage VCTL (V)

100 k

10 k

10

100

1000

Timing capacitor CT (pF)

(Continued)

15

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