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参数资料
| 型号： | LA4815M |
| 厂商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.62 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封装： | 0.225 INCH, MFP-8 |
| 文件页数： | 14/14页 |
| 文件大小： | 233K |
| 代理商： | LA4815M |
LA4815M
10. Signal mixing methods
The following methods can be used to mix a beep, key tone or other signal into the audio signal. Note that when input
to Pin 8 is selected, amplification of signals input from Pin 3 changes according to impedance Z8 connected to Pin 8.
10-1. Mixing method using resistors in the Pin 3 input front end
Vbias
100k
Ω
+
-
Pre-Amp
Rg2
Rg1
Signal-2
Signal-1
other IC
ro
Rg3
Vout2
Vout1
ro
LA4815M
Cin
Vin
Pin 3 input impedance : Zin = 100k
Ω
IN
OUT1
OUT2
3
Figure 10
10-2. Method using input to Pin 8
First signal system (Signal-1) voltage gain : Vg1
Vg1 = 20log (Vout/Vin1) = 20log (4 × (125 + Z8) (500 + (125 × Z8/(125 + Z8)))/(25 × Z8))
* Z8 = R1 + ro
Second signal system (Signal-2) voltage gain : Vg2
Vg2 = 20log (Vout/Vin2) = 20log (10000/(125 + R1))
* fc2 = 1/(2
π × Cin2 × (R1 + 125))
Vbias
100k
Ω
+
-
+
-
Pre-Amp
Rg2
Rg1
Signal-2
Signal-1
other IC
ro
R1
Vin2
ro
LA4815M
Cin
Cin2
Vin1
+
125
Ω
10k
Ω
PWR - Amp
500
Ω
OUT1
OUT2
IN
GAIN2
3
8
5 Vout
OUT
Figure 11
11. Short-circuit between pins
Turning on the power supply with some pins short-circuited may cause deterioration or breakdown. Therefore, when
mounting the IC on a board, check to make sure that no short-circuit is formed between pins by solder or other foreign
substances before turning on the power supply.
12. Load short circuit
Leaving the IC for a long time in the condition with a load short circuit may cause deterioration or breakdown.
Therefore, never short-circuit the load.
13. Maximum ratings
When used under conditions near the maximum ratings, even a slight fluctuation in the conditions may cause the
maximum ratings to be exceeded, possibly resulting in a breakdown or other accidents. Therefore, always provide
enough margin for fluctuations in the supply voltage and other conditions, and use within a range not exceeding the
maximum ratings.
No.A1373-9/14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LA4815M_10 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Monaural Power Amplifier |
| LA4815M-TLM-H | 功能描述:功率放大器 MONAURAL POWER AMPLIFIER RoHS:否 制造商:TriQuint Semiconductor 封装 / 箱体: 工作电源电压:28 V 电源电流:2.5 A 工作温度范围: 封装: |
| LA4815VH | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Monaural Power Amplifier |
| LA4815VH_12 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Monaural Power Amplifier |
| LA4815VH-MPB-H | 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 |
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