Fujitsu MB3878 Manual Do Utilizador

20

■

■

■

■

+

−

−

+

8

10

13

12

A

B

C

D

9

+

−

+

−

+

−

−

+

4

2

24

1

3

×

 25

×

 25

+ + + −

5

20

21

19

−

+

+

+

−

11

16

22

17

6

23

14

18

<Current Amp.1>

<Error

   Amp.1>

7

VREF

<Current Amp.2>

<Error

   Amp.2>

VREF

<Error

   Amp.3>

VREF

VREF

VREF

5.0 V

4.2 V

1 

µ

A

15

<SOFT>

2.5 V

1.5 V

<OUT>

<UVLO>

<OSC>

Bias

Voltage

<VH>

<REF>

<CTL>

<PWM Comp.>

Drive

V

CC

(V

CC

 

−

 5 V)

(VCC UVLO)

VCC

VCC

VCC

CTL

215 k

Ω

35 k

Ω

0.91 V

(0.77 V)

VREF

UVLO

bias

−

INC2

OUTD

FB2

VREF

−

INE2

+

INE2

+

INE1

FB1

OUTC1

−

INE1

−

INC1

+

INC2

GND

CS

VCC (O)

OUT

Q1

Output voltage (Battery voltage) is adjustable

D1

Battery

VH

RT

−

INE3

FB3

+

INC1

(45 pF)

R8 100 k

Ω

C10

5600 pF

+

−

+

−

+

−

R9

10 k

Ω

R14 1.3 k

Ω

R10

24 k

Ω

R11

36 k

Ω

R7

22 k

Ω

R18

200 k

Ω

R17 100 k

Ω

C

S

2200 pF

R3

330 k

Ω

R

T

47 k

Ω

C9 0.1 

µ

F

C7 0.1 

µ

F

C5

0.1 

µ

F

C2

100 

µ

F

C3 100 

µ

F

C1 22 

µ

F

R

S

1

0.033 

Ω

R

S

2

0.033 

Ω

L1

12 

µ

H

R22

100 k

Ω

R21

100 k

Ω

R19

100 k

Ω

R20

100 k

Ω

R15

110 

Ω

R16

200 k

Ω

Q2

A(1/2)

A(2/2)

SW

VIN

VIN

Note : SW ON : Differential Charging MODE

R12

30 k

Ω

R13

30 k

Ω

C8

10000 pF

A

B

C

D

System

AC Adaptor

VIN

BATT

OUTC2

R23

100 k

Ω

C6

1500 pF

SW OFF : Dead Battery MODE

Range of input voltage

VIN = 13V to 21V(at Load = 3A)