參數(shù)資料
型號(hào): LA7473V
元件分類: 音頻/視頻放大
英文描述: 2 CHANNEL, AUDIO AMPLIFIER, PDSO30
封裝: 0.275 INCH, SSOP-30
文件頁(yè)數(shù): 8/11頁(yè)
文件大?。?/td> 133K
代理商: LA7473V
LA7473V
No.5333-6/11
Pin Functions
Pin No.
Pin Name
DC voltage
Description
Equivalent circuit
1
30
INPUT
SELECT
CTL-1
INPUT
SELECT
CTL-2
Internal/external switching
Stereo/mono discrimination control
30
1
VCC
50k
Ω
100k
Ω
2
29
EXT IN-L
EXT IN-R
1.45V
(VCC = 3.3V)
2.2V
(VCC = 4.75V)
External microphone input
Input impedance : 70k
Ω
VCC
80
μA
70k
Ω
BIAS
2
29
3
28
EXT AMP
NFB1-L
EXT AMP
NFB1-R
1.45V
(VCC = 3.3V)
2.2V
(VCC = 4.75V)
External amplifier NFB
100k
Ω
EXT AMP
OUT
3
28
VCC
4
27
EXT AMP
NFB2-L
EXT AMP
NFB2-R
0.1V
(VCC = 3.3V)
0.15V
(VCC = 4.75V)
External amplifier output attenuation output
4.3k
Ω
333
Ω
100k
Ω
4
27
3
28
VCC
5
RIPPLE
FILTER
2.4V
(VCC = 3.3V)
2.3V
(VCC = 4.75V)
Used to exclude ripple from internal circuits.
Ripple is removed with a filter consisting of an
external capacitor and 75k
Ω resistor.
75k
Ω
5
Continued on next page.
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