MB3889 Ver la hoja de datos (PDF) - Fujitsu

Número de pieza

componentes Descripción

Fabricante

MB3889

2-Channel DC/DC Converter IC with Overcurrent Protection Symmetrical-Phase Type

Fujitsu 

MB3889

s PIN DESCRIPTION

Pin No. Symbol

I/O

1

−INE1

I

2

FB1

O

3

CS1



4

N.C.



5

RT



6

CTL

I

7

SGND



8

VREF

O

9

CTL1

I

10

CTL2

I

11

CSCP



12 PWRGOOD O

13

CS2



14

FB2

O

15

−INE2

I

16

CB2



17

OUT1-2

O

18

VS2



19

OUT2-2

O

20

PGND2



21

N.C.



22

VB

O

23

ILIM2

I

24

VCC



25

ILIM1

I

26

PGND1



27

OUT2-1

O

28

VS1



29

OUT1-1

O

30

CB1



4

Descriptions

CH1 error amp inverted input terminal

CH1 error amp output terminal

CH1 soft-start capacitor connection terminal

No connection

Triangular waveform oscillation frequency setting resistor connection termi-

nal

Power supply control terminal.

“H” level : IC operating mode

“L” level : IC Standby mode

Ground terminal

Reference voltage output terminal

CH1 control terminal

“H” level : CH1 ON state

“L” level : CH1 OFF state and protection status reset

CH2 control terminal

“H” level : CH2 ON state

“L” level : CH2 OFF state and protection status reset

Timer-latch short-circuit protection capacitor connection terminal

CH1, CH2 protection status output terminal

CH2 soft-start capacitor connection terminal

CH2 error amp output terminal

CH2 error amp inverted input terminal

CH2 boot capacitor connection terminal

Connect a capacitor between the CB2 and VS2 terminals.

CH2 totem-pole output terminal (External main-side FET gate drive)

CH2 external main-side FET source connection terminal

CH2 totem-pole output terminal (External synchronous-rectification-side FET

gate drive)

Ground terminal

No connection

Output circuit bias output terminal

CH2 overcurrent detection resistor connection terminal

Reference voltage, control circuit power supply terminal

CH1 overcurrent detection resistor connection terminal

Ground terminal

CH1 totem-pole output terminal (External synchronous-rectification-side FET

gate drive)

CH1 external main-side FET source connection terminal

CH1 totem-pole output terminal (External main-side FET gate drive)

CH1 boot capacitor connection terminal

Connect a capacitor between the CB1 and VS1 terminals.

Share Link: