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參數(shù)資料
| 型號(hào)： | LV47017P |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | AUDIO AMPLIFIER, ZFM25 |
| 封裝： | ZIP-25 |
| 文件頁數(shù)： | 4/5頁 |
| 文件大?。?/td> | 155K |
| 代理商： | LV47017P |
LV47017P
No.A1691-4/9
External Components
Part Name
Recommended Value
Purpose
Remarks
C1 to C5
0.47
μF
Cuts DC voltage
The larger the constant value, the lower the cut-off frequency
The values of C1 to C5 must be the same
C6
22
μF
Reduces ripples
Reduces pop noise
The larger the constant value, the longer the amplifier ON/OFF time
C7
2200
μF
Ripple filter
Eliminating power supply ripples
C8
0.1
μF
Improves oscillation stability
Reducing high-frequency noise
C9
1
μF
Reduces pop noise
The larger the constant value, the longer the mute ON/OFF time
R1
10k
Ω
Reduces pop noise
The larger the constant value, the longer the mute ON/OFF time
R2
4.7k
Ω
Pull-up resistor
* The components and constant values within the test circuit are used for confirmation of characteristics and are not guarantees that incorrect or trouble will not
occur in application equipment.
Description of Operation
1. Standby switch function (pin 4)
Threshold voltage of the pin 4 is set by about 2VBE.
The amplifier is turned on by the applied voltage of 2.5V or more. Also, the amplifier is turned off by the applied
voltage of 0.5V or less.
Fig1 Standby equivalent circuit
2. Muting function (pin 22)
The muted state is obtained by setting pin 22 to the ground potential, enabling audio muting.
The muting function is turned on by the applied voltage of 1V or less to the resistance of 10k
Ω. And the muting
function is turn off when this pin opens.
Also, the time constant of the muting function is determined by external capacitor and resistor constants.
It is concerned with a pop noise in amplifier ON/OFF and mute ON/OFF. After enough examination, please set it.
Fig2 Mute equivalent circuit
3. ACGND pin (pin 16)
The capacitor of the pin 16 must use the same capacitance value as the input capacitor.
Also, connect to the same PREGND as the input capacitor.
4
STBY
10k
Ω
30k
Ω
+
MUTE
OFF
ON
10k
Ω
18k
Ω
1
μF
about
50
μA
about
2.5V
200
Ω
22
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相關(guān)代理商/技術(shù)參數(shù) |
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| LV47017P_12 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:4-Channel BTL Power Amplifier |
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| LV47022P-H | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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