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參數(shù)資料
| 型號： | TDA7266D |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封裝： | POWERSO-20 |
| 文件頁數(shù)： | 8/13頁 |
| 文件大?。?/td> | 194K |
| 代理商： | TDA7266D |
TDA7266D
4/13
APPLICATIVE SUGGESTIONS
STAND-BY AND MUTE FUNCTIONS
(A) Microprocessor Application
In order to avoid annoying "Pop-Noise" during Turn-On/Off transients, it is necessary to guarantee the right St-
by and mute signals sequence.It is quite simple to obtain this function using a microprocessor (Fig. 1 and 2).
At first St-by signal (from
P) goes high and the voltage across the St-by terminal (Pin 9) starts to increase ex-
ponentially. The external RC network is intended to turn-on slowly the biasing circuits of the amplifier, this to
avoid "POP" and "CLICK" on the outputs.
When this voltage reaches the St-by threshold level, the amplifier is switched-on and the external capacitors in
series to the input terminals (C1, C3) start to charge.
It's necessary to mantain the mute signal low until the capacitors are fully charged, this to avoid that the device
goes in play mode causing a loud "Pop Noise" on the speakers.
A delay of 100-200ms between St-by and mute signals is suitable for a proper operation.
Figure 1. Microprocessor Application
2
5
7
Vref
ST-BY
9
IN1
C1 0.22
F
VCC
15
6
D02AU1409
+
-
+
OUT1+
OUT1-
19
16
14
MUTE
8
IN2
C3 0.22
F
+
-
+
OUT2+
OUT2-
20
13
S-GND
PW-GND
C5
470
F
C6
100nF
R1 10K
C2
10
F
P
R2 10K
C4
1
F
1
10
11
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7266D13TR | 功能描述:音頻放大器 7+7W DUAL BRIDGE AMP 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 |
| TDA7266G-J15-A-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:7+7W DUAL BRIDGE AMPLIFIER |
| TDA7266G-J15-B-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:7+7W DUAL BRIDGE AMPLIFIER |
| TDA7266G-J15-D-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:7+7W DUAL BRIDGE AMPLIFIER |
| TDA7266-J15-A-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:7+7W DUAL BRIDGE AMPLIFIER |
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