Sanyo 1 682 351 01, Руководство по обслуживанию

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3
、
Headphone Amplifier BH3547F
● Description
BH354
7
F is
one
headphone amplifier suitable for portable products.
BH354
7
F 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.
BH354
7
F 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.
BH354
7
F can drive 16/32 Ω 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
5 6 7 8
3 4
V CC
OUT2 BIA S IN2
180 k
(90 k)
180 k
(9 0k)
0 dB
(6d B)
0d B
(6d B)
B IAS
MUTE
TS D
2 1
OU T1 MUTE I N1 GND


●
Block diagra m