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参数资料
| 型号： | TDA7297 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM15 |
| 封装： | MULTIWATT-15 |
| 文件页数： | 3/9页 |
| 文件大小： | 172K |
| 代理商： | TDA7297 |
1
2
4
Vref
ST-BY
7
IN1
C1 0.22
F
VCC
13
3
D95AU258A
+
-
+
OUT1+
OUT1-
15
14
12
MUTE
6
IN2
C3 0.22
F
+
-
+
OUT2+
OUT2-
8
9
S-GND
PW-GND
C5
470
F
C6
100nF
R1 10K
C2
10
F
P
R2 10K
C4
1
F
Figure 1: Microprocessor Application
ELECTRICAL CHARACTERISTICS (Continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
VTMUTE
Mute Threshold
VO = -30dB
2.3
2.9
4.1
V
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
220
500
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.
TDA7297
3/9
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相关代理商/技术参数 |
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|---|---|
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| TDA7297D13TR | 功能描述:音频放大器 10W/10W DUAL BRIDGE AMP 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 |
| TDA7297SA | 功能描述:音频放大器 10W, 10W Dual Bridge 6V - 18V Portable 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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| TDA7298V | 功能描述:音频放大器 28W Hi-Fi Audio Amp 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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