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參數(shù)資料
| 型號(hào)： | AN17000A |
| 廠商： | PANASONIC CORP |
| 元件分類： | 音頻控制 |
| 英文描述： | Audio signal processing IC for notebook PC |
| 中文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO56 |
| 封裝： | 0.300 INCH, 1 MM HEIGHT, HEAT SINK, PLASTIC, TSOP-56 |
| 文件頁數(shù)： | 18/25頁 |
| 文件大?。?/td> | 351K |
| 代理商： | AN17000A |
AN17000A
18
SDC00042BEB
I
Applicaon Notes (continude)
1. Pin descriptions (continude)
Pin 34 (beep control (headphone amplifier))
A value of VR2 is bigger, output level is smaller.
Around 10 k
is suitable as the maximum value for VR2. The beep output at the headphone output is 0.864
×
10 k
/(1 k
+
VR2) V[p-p], where VR2 is the resistance of the resistor between pin 34 and GND.
Pin 35 (headphone amplifier mute control)
Suitable value of R7 is 75 k
and suitable value of C16 is 0.68
μ
F.
Rise time is about 20 ms.
If value of R and C is smaller, switching time is shorter but there is a possibility of pop sound occurrence.
Pin 36 (Speaker power selector)
If this pin is left open, output power of 1 W or more is possible.
If this pin is short-circuitted to GND, the output power is limited to 0.5 W.
Pin 37 (ripple filter (headphone))
A recommended value is 4.7
μ
F.
If capacitor value is bigger, rise time at standby is longer.
If capacitor value is smaller, rise time at standby is shorter, but there are possibilities of pop sound occurrence
and deteriorations of power supply ripple rejection and cross talk and THD.
Pin 38 (GND (speaker small signal use))
Pin 39 (volume control)
Please put a variable volume of 50 k
or more between headphone V
CC
and headphone GND.
Pin 40 (ripple filter (line amplifier))
A recommended value is 4.7
μ
F.
If capacitor value is bigger, rise time at standby is longer.
If capacitor value is smaller, rise time at standby is shorter, but there are possibilities of pop sound occurrence
and deteriorations of power supply ripple rejection and cross talk and THD.
Pin 41 (standby (line amplifire, headphone amplifier))
Swichting time depends on value of pin 37 and pin 40 capacitors.
Pin 42 (N.C.)
Pin 42 connects to IC's heat sink.
1) Case of not using bass boost
Please open pin 6, pin 47, pin 48, pin 49 and pin 50.
Please connect pin 51 to GND.
Please short between pin 45 and pin 46.
2) Case of not using line amplifire
Please open pin 27, pin 28, pin 29, pin 31 and pin 32.
Please connect pin 33 to GND.
Pin 43 (speaker mute control)
Suitable value of R8 is 75 k
, suitable value of C19 is 0.68
μ
F.
Rise time is about 20 ms.
If value of R and C is smaller, switching time is shorter, but there is a possibility of pop sound occurrence.
Pin 44 (standby (speaker))
Swichting time depends on value of pin 9 capacitor.
If value of C3 is 1
μ
F, rise time is about 80 ms.
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