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參數(shù)資料
| 型號(hào)： | AN12943A |
| 廠商： | PANASONIC CORP |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | Audio signal processing IC for notebook PC |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO56 |
| 封裝： | 0.300 INCH, PLASTIC, HSOP-56 |
| 文件頁數(shù)： | 12/32頁 |
| 文件大?。?/td> | 501K |
| 代理商： | AN12943A |
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12
SDC00057AEB
AN12943A
NC
8,
10,
37,
46
It connects a condenser for the peak
detection. It is the circuit which detects
a peak after rectifying the audio signal
of the audio signal automatic detection
circuit in both waves. By changing a
capacity value, the time which the power
saving depends on in case of the
switchover which is without signal with
signal's there being can be changed.
Signal less time:
Constant current
source
Signal's there
being:
The output
impedance
:
About 1 k
Audio automatic
detection
detection pin:
Signal nothing
DC: 0.0 V
Signal's there
being
DC: 2.0 V
7
The output
impedance: Equal
to or less than 1
Impedance
It is GND pin for the speaker amplifier.
Pin 6 is for R-channel.
Pin 51 is for L-channel.
Because the big electric current flows, it
is desirable to separate from the GND
line to the other GND pin on the board
pattern. Also, it isn't connected with the
substrate potential in the IC.
GND_SP
DC: 0.0 V
6,
51
Output pins of speaker amplifiers.
It becomes BTL output.
Pin 2, pin 3 for R-channel positive
phase output
Pin 4, pin 5 for R-channel negative
phase output
Pin 54, pin 55 for L-channel positive
phase output
Pin 52, pin 53 for L-channel negative
phase output
To reduce voltage loss caused by the
wire resistance in maximum output, it
makes output 2 terminals.
When the speaker amplifiers save power,
DC voltage is also kept.
Speaker output
Pin 2, pin 3
Pin 54, pin 55
Positive phase
Pin 4, pin 5
Pin 52, pin 53
Negative phase
DC: 2.20 V
AC: 4 dBV
2,
3,
4,
5,
52,
53,
54,
55
Power supply pins specifically designed
for speaker amplifiers.
Pin 1 for R-channel.
Pin 56 for L-channel.
Because the big electric current flows, it
is desirable to separate from the V
CC
line
to the other power supply pins on the
board pattern.
V
CC
_SP
DC: 5.0 V
1,
56
Description
Inner circuit
Waveform
and voltage
Pin
No.
Technical Data
y
Circuit diagrams of the input/output part and pin function descriptions
Note) The characteristics listed below are reference values based on the IC design and are not guaranteed.
7
100k
1k
V
REG
(4.5 V)
V
SS
(
2.6 V)
V
_SP
(5.0 V)
20k
4k
Pin 2
3
54
55
Pin 4
5
52
53
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