Sanyo 1 682 351 01 Service Manual page 20

3、 Headphone
●Description
BH3547F is one headphone amplifier suitable for portable products.
BH3547F has a fixed gain of 6 dB.
External resistors for gain setting are not needed. Package of BH3541F, BH3544F, BH3547F, BH3548F is pin-to-pin
compatible (SOP8), enable to replace each other easily.
BH3547F also has mute functions that make it easy to prevent pop noise when power supply turns on/off. Moreover,
thermal shutdown function is built-in.
BH3547F can drive 16/32Ω load.
receiver.
●Features
1) Built-in mute function for preventing pop noise when power supply turns on/off
2) Built-in thermal shutdown function
3) BH3541F, BH3544F, BH3547F, BH3548F are pin-to-pin compatible
4) SOP8 small package
●Applications
TV, Desktop PC, Notebook PC, Camcorder and other equipment having headphone output
●Block diagra m
Amplifier BH3547F
V CC
O UT2
8 7
0d B
(6d B)
TS D
0 dB
(6d B)
MUTE
1 2 3
OU T1 MUTE I N1
BIA S IN2
6 5
B IAS
180 k
(90 k)

180 k
(9 0k)

4
G ND