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参数资料
| 型号： | TB2929HQ |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 24 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| 封装： | 1 MM PITCH, PLASTIC, HZIP-25 |
| 文件页数： | 15/17页 |
| 文件大小： | 262K |
| 代理商： | TB2929HQ |
TB2929HQ
2009-01-29
7
5. Pop Noise Suppression
Since the TB2929HQ uses the AC-GND pin (pin 16) as the common input reference voltage pin for all
amplifiers, the ratio of the input capacitance (C1) to the AC-to-GND capacitance (C6) should be 1:4.
Also, if power is removed before C1 and C6 are completely charged, pop noise will be generated because of
unbalanced DC currents.
To avoid this problem, it is recommended to use a larger capacitor as C2 to increase the charging times of C1
and C6. Note, however, that C2 also affects the time required from power-on to audio output.
The pop noise generated by the muting and unmuting of the audio output varies with the time constant of
C4. A larger capacitance reduces the pop noise, but increases the time from when the mute control signal is
applied to C4 to when the mute function is enabled.
6. External Component Constants
Effects
Component
Recommended
Value
Purpose
When lower than
recommended value
When higher than
recommended value
Notes
C1
0.22
μF
To eliminate DC
Cut-off frequency is
increased.
Cut-off frequency is reduced.
Pop noise is
generated
when VCC is
turned on.
C2
10
μF
To reduce ripple
Powering on/off is faster.
Powering on/off is slower.
C3
0.1
μF
To provide
sufficient
oscillation margin
Reduces noise and provides sufficient oscillation margin
C4
1
μF
To reduce pop
noise
High pop noise. Duration until
mute function is turned on/off
is short.
Low pop noise. Duration until
mute function is turned on/off
is long.
C5
3900
μF
Ripple filter
Power supply humming and ripple filtering.
C6
1
μF
Common
reference voltage
for all input
Pop noise is suppressed when C1: C6
= 1:4.
Pop noise is
generated
when VCC is
turned on.
C7
0.22
μF
To eliminate DC
Cut-off frequency is
increased in AUX
Cut-off frequency is reduced
in AUX.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TB2929HQ(O) | 功能描述:音频放大器 45W x 4-CH class-AB car power amplifer 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 |
| TB2932HQ | 制造商:Toshiba America Electronic Components 功能描述: |
| TB2932HQ(O) | 功能描述:音频放大器 49W x 4-CH class -AB car power amplifer 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 |
| TB2939HQ(O) | 功能描述:音频放大器 45W x 4-CHANNEL car power amplifer 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 |
| TB2946HQ(O) | 功能描述:音频放大器 49W x 4-CH Class-AB car power amplifer 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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