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參數(shù)資料
| 型號： | TDA7297 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 15+15W DUAL BRIDGE AMPLIFIER |
| 中文描述： | 15安永雙橋式放大器 |
| 文件頁數(shù)： | 3/9頁 |
| 文件大小： | 125K |
| 代理商： | TDA7297 |
1
2
4
Vref
ST-BY
7
IN1
C1 0.22
μ
F
VCC
13
3
D95AU258A
+
-
-
+
OUT1+
OUT1-
15
14
12
MUTE
6
IN2
C3 0.22
μ
F
+
-
-
+
OUT2+
OUT2-
8
9
S-GND
PW-GND
C5
470
μ
F
C6
100nF
R1 10K
C2
10
μ
F
μ
P
R2 10K
C4
1
μ
F
Figure 1:
MicroprocessorApplication
ELECTRICALCHARACTERISTICS
(Continued)
Symbol
VT
MUTE
VT
ST-BY
I
ST-BY
e
N
Parameter
Test Condition
V
O
= -30dB
Min.
2.3
0.8
Typ.
2.9
1.3
Max.
4.1
1.8
100
Unit
V
V
μ
A
μ
V
μ
V
Mute Threshold
St-by Threshold
ST-BY current V6 = GND
Total Output Noise Voltage
A curve
f = 20Hz to 20kHz
150
220
500
APPLICATION SUGGESTION
STAND-BY AND MUTE FUNCTIONS
(A) MicroprocessorApplication
In order to avoid annoying ”Pop-Noise” during
Turn-On/Off transients, it is necessary to guaran-
tee the rightSt-by and mute signals sequence.
It is quite simple to obtainthis function using a mi-
croprocessor(Fig. 1 and2).
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 intendedto turn-on slowly the biasingcircuits 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) startto charge.
It’s necessaryto mantainthe 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 properoperation.
TDA7297
3/9
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7297D | 功能描述:音頻放大器 10W/10W 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 |
| TDA7297D13TR | 功能描述:音頻放大器 10W/10W 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 |
| TDA7297SA | 功能描述:音頻放大器 10W, 10W Dual Bridge 6V - 18V Portable 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 |
| TDA7298 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:28W Hi-Fi AUDIO POWER AMPLIFIER WITH MUTE / STAND-BY |
| TDA7298V | 功能描述:音頻放大器 28W Hi-Fi Audio 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 |
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