MB39A102 データシートの表示（PDF） - Fujitsu

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MB39A102

4-ch DC/DC Converter IC

Fujitsu 

MB39A102

■ BLOCK DIAGRAM

Threshold voltage

−INE1

29

12

accuracy ±1.5%

µAVREF

Error

− Amp1

CS1 30

++

FB1 28

1.24 V

L priority

DTC1 27

L priority

PWM

++Comp.1

−

CH1

Drive1

Pch

IO = 130 mA

at VCCO = 4 V

26 VCCO

25 OUT1

Threshold voltage

−INE2

2

12

accuracy

µAVREF

−

±1.5%

Error

Amp2

CS2 1

++

FB2 3

1.24 V

L priority

DTC2 4

L priority

PWM

++Comp.2

−

CH2

Drive2

Pch

IO = 130 mA

at VCCO = 4 V

24 OUT2

Threshold voltage

−INE3

14

12

accuracy ±1.5%

µAVREF

Error

− Amp3

CS3 15

++

1.24 V

FB3 13

L priority

DTC3 12

Threshold voltage

−INE4

17

12

accuracy ±1.5%

µAVREF

Error

− Amp4

CS4 16

++

FB4 18

1.24 V

L priority

DTC4 19

L priority

PWM

++Comp.3

−

CH3

Drive3

Pch

IO = 130 mA

at VCCO = 4 V

L priority

PWM

++Comp.4

−

CH4

Drive4

Nch

IO = 130 mA

at VCCO = 4 V

23 OUT3

22 OUT4

21 GNDO

VREF

83 kΩ

SCP

Comp.

−INS 20

−

+

1V

CSCP 11

SCP

UVLO

H:

at SCP

Error Amp Power Supply

SCP Comp. Power Supply

H:UVLO

release

5

Error Amp Reference

bias 1.24 V

VCC

OSC

89

0.9 V Accuracy

0.4 V ±1%

2.0 V

7

VREF

Power

VR1 ON/OFF

CTL

10

6 CTL

H : ON (Power/ ON)

L : OFF (Standby mode)

RT CT

VREF

GND

VTH = 1.4 V

5

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