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參數資料
| 型號： | LA4632 |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM12 |
| 封裝： | SIP-12 |
| 文件頁數： | 4/8頁 |
| 文件大小： | 159K |
| 代理商： | LA4632 |
LA4632
No.8178-4/8
Application Circuit Example/Test Circuit Diagram
LA4632
RF
IN1
PRE
GND
IN2
STBY
MUTE
VCC
+OUT2
-OUT2
PWR
GND
-OUT1
+OUT1
C3
47
F
25V
C1
4.7
F
16V
C2
4.7
F
16V
++
+
STBY
5V
R1
15k
Mute
5V
C5
1000
F
25V
C4
10
F
10V
R4
2.2
VCC
R5
2.2
C8
0.1
F
C9
0.1
F
C6
0.1
F
C7
0.1
F
R2
2.2
R3
2.2
RL
12
11
10
9
8
7
6
5
4
3
2
1
Top view
Caution
Although the LA4632 is basically pin compatible with the LA4631, there are certain differences in the external
components and the way the devices are used.
External Components and Usage Notes
C1, C2 : These are input coupling capacitors; we recommend a value of 4.7
F or lower. A zero bias type circuit is
used for the LA4632 input circuits, and the input pin potential is close to zero volts. Therefore the polarity
must be considered in conjunction with the DC potential of the circuit connected to the LA4632 front end.
If there is a large potential difference between the plus and minus sides of the input capacitors, the
stabilization time when power is first applied can be reduced by reducing the value of the input capacitors,
as long as that reduction does not compromise the low-band characteristics.
C3
: This capacitor is used both as a ripple filter and to set the amplifier's startup time. A value of 47
F is
recommended. With this value, the startup time (the time from the point power is first applied until the
point an output is generated) will be about 0.6 to 0.7 seconds. (See note 1.)
C4, R1 : This RC circuit is used for mute smoothing. C4 is required even if the muting function is not used.
(See note 2.)
C5
: Power supply capacitor
C6 to C9, R2 to R5
: These components form oscillation prevention RC circuits. We recommend using polyester film apacitors
(Mylar capacitors) with excellent thermal characteristics for C6 through C9. (R2 to R5 are 2.2
1/4W
resistors.)
*1. Startup time
The LA4632 features a built-in startup circuit that can be adjusted somewhat by changing the value of the capacitor
connected to pin 1. (With the recommended value of 47
F, the time is about 0.6 to 0.7 seconds (a time that changes
somewhat with VCC). That time can be extended to about 0.8 to 0.9 seconds by inserting a capacitor with a value of
10F in parallel.) Since using a capacitor with a value smaller than the recommended value may reduce the SVRR
between ground and the output, we cannot recommend using a smaller value.
*2. Signal muting function
The signal muting function is turned on by connecting the recommended RC circuit (10
F, 15k) to pin 6 and
applying a voltage of +5V to the mute pin. This circuit implements a muting function with extremely low impulse
noise.
This RC circuit is used to smooth the attack and recovery times, and since the 10
F capacitor also has the function of
smoothing after the startup time, it is required even if the signal muting function is not used.
相關PDF資料 |
PDF描述 |
|---|---|
| LA4635A | 4.5 W, 2 CHANNEL, AUDIO AMPLIFIER, SFM12 |
| LA4635B | 4.5 W, 2 CHANNEL, AUDIO AMPLIFIER, SFM12 |
| LA4636 | 11 W, 2 CHANNEL, AUDIO AMPLIFIER, SFM12 |
| LA4663N | 20 W, 2 CHANNEL, AUDIO AMPLIFIER, ZFM14 |
| LA4663 | 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM14 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LA4632-E | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LA4635 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:2-Channel BTL AF Power Amplifier |
| LA4635A | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For General Audio Use 2-Channel BTL AF Power Amplifier |
| LA4635B | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:2-Channel BTL AF Power Amplifier |
| LA4636 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:For General Audio Use 11 W 2-Channel BTL AF Power Amplifier |
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