MB3892 View Datasheet(PDF) - Fujitsu

Part Name

Description

Manufacturer

MB3892

Power Management IC for Mobile Phone

Fujitsu 

MB3892

• Speaker Amp.

PDSP

PDRCV

ON/

OFF BIAS

BP

18

4.7 µF +

−

18 kΩ

24 kΩ

PDSP

IN

L

19

H

FB

L

20

H

PDSP

CHOISE

L HL H

5 kΩ

+

−

30

kΩ

30 kΩ

+

−

5 kΩ

+

−

30

kΩ

30 kΩ

+

−

BUZZSEL

OUTB

26

10 kΩ

Receiver Amp.

10 kΩ

25

OUTA

32 Ω

SPOUTB

23

10 kΩ

Loudspeaker Amp.

8Ω

10 kΩ

22

SPOUTA

Rfb

Rfb

Rin Cin

PDRCV PDSP CHOISE BUZZSEL Operating Amp.

Operation mode

L

L

×

×



Standby

H

L

H

L Receiver Amp. Receiver (BTL drive)

H

L

L

L Receiver Amp. Earphone mode (single drive)

L

H

H

L Loudspeaker Amp. Loudspeaker Amp. (BTL drive)

L

H

L

H Loudspeaker Amp. Short wave form output (open collector)

H

H

×

When both of PDRCV/PDSP is “H” level,

L Loudspeaker Amp. the operation of loudspeaker Amp. has

priority.

8

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