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参数资料
| 型号： | LA4450 |
| 厂商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 20 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM14 |
| 封装： | SIP-14 |
| 文件页数： | 3/7页 |
| 文件大小： | 218K |
| 代理商： | LA4450 |
LA4450
No.4090-3/7
Test Circuit
+
10k
ST
DC
VCC
VCC=26.4V
BS1
BS2
OUT1
OUT2
CH1
PWR
GND
CH2
PWR
GND
NF2
IN2
PRE
LA4450
GND
NF1
IN1
100
F
1000
F
1000
F
0.15
F
2.2
RL=8
47
F
1000
F
100
F
100
F
47
F
0.15
F
2.2
IN1
IN2
5V
+
CH1
+
CH2
ON
OFF
+
2
3
1
4
5
6
7
10
9
8
11
13
14
12
*
*Polyester Film Capacitor
*
1. Features and Usage Notes
Pin 12 is the standby pin. The IC operates when a voltage of 2V or higher is applied through the external resistor R1.
Note that the maximum influx current to pin 12 is 500
A.
Changing the voltage gain
+
CNF
RNf’
75
30K
IN
NF
OUT
The voltage gain VG can be lowered by connecting an
external resistor in series between the NF pin (pins 8 and 14)
and CNF.
VG = 20log
30k
75
+RNf ’
However, since the IC may oscillate if VG is 30dB or lower,
use a VG of 36dB or higher.
The LA4450 includes a thermal protection circuit to prevent damage to or destruction of the IC due to abnormal
overheating. As a result, the output may be attenuated or cut off if the application heat sinking is inadequate.
The LA4450 includes an overvoltage protection circuit to protect the IC against power supply surges and abnormal
voltages. This circuit has hysteresis characteristics : it operates at between 39 and 40V, and recovers at around 34V.
Although the LA4450 includes a current limiter circuit to prevent damage due to abnormal currents, care must still be
exercised to prevent load shorts and other excessive current conditions.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LA4450_10 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:For Bus and Track in Car Stereo 2-Channel Power Amplifier |
| LA4450-E | 功能描述:音频放大器 2-CH POWER AMPLIFIER RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LA4450F-E | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LA4450L-E | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| LA4451-E | 制造商:ON Semiconductor 功能描述:AUDIO AMPLIFIER SE 2CH - Ammo Pack 制造商:ON Semiconductor 功能描述:FNFLD / AUDIO AMPLIFIER SE 2CH |
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