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| 型號： | TDA7266L |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 7 W, 1 CHANNEL, AUDIO AMPLIFIER, PSFM10 |
| 封裝： | SIP-10 |
| 文件頁數(shù)： | 3/7頁 |
| 文件大?。?/td> | 124K |
| 代理商： | TDA7266L |
ELECTRICAL CHARACTERISTICS (Continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VTST-BY
St-by Threshold
0.8
1.3
1.8
V
IST-BY
ST-BY current V6 = GND
100
A
eN
Total Output Noise Voltage
A curve
f = 20Hz to 20kHz
150
V
APPLICATION SUGGESTION
STAND-BY AND MUTE FUNCTIONS
(A) Microprocessor Application
In order to avoid annoying "Pop-Noise" during
Turn-On/Off transients, it is necessary to guaran-
tee the right St-by and mute signals sequence.
It is quite simple to obtain this function using a mi-
croprocessor (Fig. 1 and 2).
At first St-by signal (from mP) goes high and the
voltage across the St-by terminal (Pin 7) starts to
increase exponentially. 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 (C3,
C5) 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.
(B) Low Cost Application
In low cost applications where the
P is not pre-
sent, the suggested circuit is shown in fig.3.
The St-by and mute terminals are tied together
and they are connected to the supply line via an
external voltage divider.
The device is switched-on/off from the supply line
and the external capacitor C4 is intended to delay
the St-by and mute threshold exceeding, avoiding
"Popping" problems.
+VS(V)
VIN
(mV)
VST-BY
pin 7
Iq
(mA)
ST-BY
MUTE
PLAY
MUTE
ST-BY
+18
1.8
0.8
VMUTE
pin 6
4.1
2.3
OFF
D96AU259
VOUT
(V)
2.9
1.3
Figure 1: Microprocessor Driving Signals.
TDA7266L
3/7
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| TDA7266M | 7 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7266L-J15-A-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:7+7W DUAL BRIDGE AMPLIFIER |
| TDA7266L-J15-B-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:7+7W DUAL BRIDGE AMPLIFIER |
| TDA7266L-J15-D-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:7+7W DUAL BRIDGE AMPLIFIER |
| TDA7266M | 功能描述:音頻放大器 7W MONO 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 |
| TDA7266MA | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:7W+7W DUAL BRIDGE AMPLIFIER |
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