參數(shù)資料
型號(hào): AN5270
廠商: PANASONIC CORP
元件分類: 音頻/視頻放大
英文描述: 4.3 W X 1(8ohm) Power Amplifier with Volume Control and Tone Control
中文描述: 4.3 W, 1 CHANNEL, AUDIO AMPLIFIER, PSFM9
文件頁數(shù): 6/9頁
文件大小: 82K
代理商: AN5270
6
AN5270
ICs for Audio Common Use
R1(
)
C1(F)
Actual Gain(dB)*
f
2
(Hz)
G
TC
(dB)
G1(100 Hz)
G2(1 kHz)
G3(10 kHz)
2.2 k
5.1k
0.039
μ
0.039
μ
0.039
μ
0.039
μ
0.1
μ
0.1
μ
0.1
μ
0.1
μ
0.1
μ
0.1
μ
35.0
31.0
34.0
31.0
31.0
31.0
1.8 k
800
10.0
21.0
10 k
20 k
1 k
2.2 k
3 k
26.0
17.5
24.0
27.5
25.0
26.0
30.0
30.0
30.0
408
204
1.6 k
723
530
21.0
18.0
14.0
36.0
34.0
33.0
35.0
32.0
31.0
30.0
30.0
30.0
10.0
19.0
21.0
5.1 k
10 k
20 k
31.0
26.0
18.0
29.0
27.0
26.0
30.0
30.0
30.0
312
159
80
19.0
17.0
16.0
I
Technical Information (continued)
Cut-off frequencies
1
2
π
· G · Ci · Ri
1
2
π
· R1 · C1
f
1
=
=
2.5 kHz
where G
=
40 times, Ci
=
33 pF, R1
=
47 k
f
2
=
=
530 Hz
if R1
=
3 k
, C2
=
0.1
μ
F
Summary of frequency characteristics for typical values of R1 and C1
Note) * : Tone
=
max.
Table. Tabulated summary of frequency characteristics of AN5270.
Volume control
The volume control range is 0 to 5 V. This range is adopted so as to simplify the pull-up of typical PWM output from
micro-computer IC. The following simplified PWM output configuration is suggested :
The high input impedance of the volume control pin makes the input current extremely small, so that it is not
necessary to have an external buffer at the PWM output.
Configuration A :
4
5
12 k
R5
2.2
μ
F
C4
5 V
PWM output
Micro-
computer
IC
R4
18 k
Fig. Volume control interface circuit for AN5270
300
300
Volume
control
Treble
control
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