MB39A123 查看數據表（PDF） - Fujitsu

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MB39A123

6 ch DC/DC Converter IC with Synchronous Rectification

Fujitsu 

MB39A123

■ BLOCK DIAGRAM

VIN

(5 V-11 V)

Step-down

(Synchronous

Rectification)

A

−INE1 38

L priority

VREF

Error

CS1 39

1.1 µA

− Amp1

+

+

FB1 37

(1.0 V)

PWM

Comp.1

+

−

<<ch.1>>

Io = 300 mA

at VCCO = 7 V

Drive1-1

P-ch

VCCO

36

OUT1-1

35

A

Vo1

(1.2 V)

Reference voltage

1.0 V ± 1 %

Drive1-2

N-ch

OUT1-2

34

Dead Time

(td = 50 ns)

Io = 300 mA

at VCCO = 7 V

Step-down

B

B

−INE2 41

L priority

VREF

Error

Max Duty VREF L priority

<<ch.2>>

CS2

40

1.1 µA

Amp2

−

+

+

92 % ± 5 %

PWM

Comp.2

+

+

−

Drive2

P-ch

OUT2

33

Vo2

(2.5 V)

FB2 42

DTC2 43

1.23 V

Reference voltage

1.23 V ± 1 %

Io = 300 mA

at VCCO = 7 V

Step-down

C

C

−INE3 46

L priority

VREF

Error

Max Duty VREF L priority

<<ch.3>>

CS3 47

1.1 µA

Amp3

−

+

+

92 % ± 5 %

PWM

Comp.3

+

+

−

Drive3

P-ch

OUT3

32

FB3 45

DTC3 44

1.23 V

Reference voltage

1.23 V ± 1 %

Io = 300 mA

at VCCO = 7 V

Vo3

(3.3 V)

D

−INA 19

−

<<ch.4>>

+

OUTA

18

INVAmp

Inverting

D

−INE4

16

CS4 17

L priority

VREF

1.1 µA

Error

Amp4

−

+

+

Max Duty VREF L priority

92 % ± 5 %

PWM

Comp.4

+

+

−

Drive4

P-ch

OUT4

31

Vo4

(−7.5 V)

1.23 V

FB4 15

DTC4

14

Reference voltage

1.23 V ± 1 %

Io = 300 mA

at VCCO = 7 V

Step-up

E

21

−INE5

L priority

VREF

Error

Max Duty VREF L priority

<<ch.5>>

CS5 20

1.1 µA

Amp5

−

+

+

92 % ± 5 %

PWM

Comp.5

+

+

−

Drive5

N-ch

OUT5

30

E

Vo5

(15 V)

1.23 V

FB5 22

DTC5 23

Reference voltage

1.23 V ± 1 %

Io = 300 mA

at VCCO = 7 V

F

Transformer

F

−INE6 26

L priority

VREF

Error

Max Duty VREF L priority

<<ch.6>>

CS6 27

1.1 µA

− Amp6

+

+

92 % ± 5 %

PWM

Comp.6

+

+

−

Drive6

N-ch

OUT6

29

Vo6-1

(15 V)

Vo6-2

(5.0 V)

FB6 25

DTC6 24

1.23 V

Reference voltage

1.23 V ± 1 %

Io = 300 mA

at VCCO = 7 V

GNDO

28

Short-circuit

detection signal

(L: at short-circuit)

Charge current

1 µA

−INS

8

CSCP

13

H:ON

L:OFF

VTH = 1.0 V

CTL1 2

CTL2 3

CTL3 4

CTL4 5

CTL5 6

CTL6 7

CHCTL

VREF

SCP

− Comp.

1V

+

SCP

H:at SCP

0.9 V

0.4 V

OSC

H:UVLO release

UVLO1

UVLO2

bias

Error Amp power supply

SCP Comp. power supply

Error Amp

reference

1.0 V/1.23 V

VCC

48

VREF

VR

Power

ON/OFF

1 CTL

CTL

11 12

RT

CT

Precision ± 0.5 %

(2.0 MHz)

2.0 V

Precision

± 0.8 %

9

VREF

10

GND

Precision

±1%

H:ON (Power ON)

L:OFF(Standby mode)

VTH = 1.0 V

<< 48 Pin >>

PKG:BCC-48++

:LQFP-48P

6

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