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參數(shù)資料
| 型號(hào)： | TB2926HQ |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 26 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| 封裝： | 1 MM PITCH, PLASTIC, HZIP-25 |
| 文件頁(yè)數(shù)： | 17/18頁(yè) |
| 文件大?。?/td> | 333K |
| 代理商： | TB2926HQ |
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TB2926HQ
2006-11-27
8
6.
Pop Noise Suppression
Since the TB2926HQ 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.
7.
External Component Constants
Effects
Component
Recommended
Value
Purpose
When lower than
recommended value
When higher than
recommended value
Notes
C1
0.22
F
To eliminate DC
Cut-off frequency is
increased.
Cut-off frequency is reduced.
Pop noise is
generated
when VCC is
turned on.
C2
47
F
To reduce ripple
Powering on/off is faster.
Powering on/off is slower.
C3
0.1
F
To provide
sufficient
oscillation margin
Reduces noise and provides sufficient oscillation margin
C4
1
F
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
F
Ripple filter
Power supply humming and ripple filtering.
C6
1
F
Common
reference voltage
for all input
Pop noise is suppressed when C1: C6
= 1:4.
Pop noise is
generated
when VCC is
turned on.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TB2929 | 制造商:Toshiba 功能描述:Four-Channel BTL power amplifier for Car Audio appliciton 4X47w |
| TB2929AHQ(O) | 制造商:Toshiba America Electronic Components 功能描述:AUDIO |
| TB2929HQ | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:45W × 4-ch BTL Audio Power IC,The TB2929HQ is a four-channel BTL power amplifier for car audio applications. |
| TB2929HQ(O) | 功能描述:音頻放大器 45W x 4-CH class-AB car power amplifer 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 |
| TB2932HQ | 制造商:Toshiba America Electronic Components 功能描述: |
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