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參數(shù)資料
| 型號(hào)： | TB2921HQ |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 29 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| 封裝： | 1 MM PITCH, PLASTIC, HZIP-25 |
| 文件頁(yè)數(shù)： | 7/11頁(yè) |
| 文件大?。?/td> | 209K |
| 代理商： | TB2921HQ |
TB2921HQ
2006-05-25
5
4.
Off-set detection function
It is possible to use this function by setting the voltage of Pin 22 higher than 8V.
In case of Appearing output offset voltage by Generating a Large Leakage Current on the input Capacitor etc.
5.
Pop Noise Suppression
Since the AC-GND pin (pin 16) is used as the NF pin for all amps, the ratio between the input
capacitance (C1) and the AC-to-GND capacitance (C6) should be 1:4.
Also, if the power is turned OFF before the C1 and C6 batteries have been completely charged, pop noise
will be generated because of the DC input unbalance.
To counteract the noise, it is recommended that a longer charging time be used for C2 as well as for C1
and C6. Note that the time which audio output takes to start will be longer, since the C2 makes the muting
time (the time from when the power is turned ON to when audio output starts) is fix.
The pop noise which is generated when the muting function is turned ON/OFF will vary according to the
time constant of C4.The greater the capacitance, the lower the pop noise. Note that the time from when the
mute control signal is applied to C4 to when the muting function is turned ON/OFF will be longer.
Figure 6
Application and Detection Mechanism
Vref
Elec. vol
25
5 V
L.P.F.
To CPU
+
V
Offset voltage (at leak or short)
DC Voltage (
) Amp (at short) (RS2)
DC Voltage (
+) Amp (at leak) (RS1)
VCC/2 (normal DC voltage)
Leak or short
Vbias
Vref/2
A
B
R
S2
RS1
(
+) Amp output
Threshold level (RS1)
VCC/2
GND
t
GND
Voltage of
point (A)
Voltage of
point (B)
Threshold level (RS2)
t
RS2
Figure 7
Wave Form
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TB2922HQ | 46 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM12 |
| TB2923AHQ | 29 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| TB2923HQ | 29 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| TB2924AFG | 21 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| TB2924FG | 19.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TB2921HQ(O) | 功能描述:音頻放大器 50W x 4-CH class-AB car power 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 |
| TB2922HQ | 制造商:Toshiba 功能描述:Pure complementary P-ch & N-ch DMOS output stage, BTL output form |
| TB2922HQ(O) | 功能描述:音頻放大器 2ch BTL Audio AMP P-ch N-ch DMOS Out-P 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 |
| TB2923AHQ(O) | 制造商:Toshiba America Electronic Components 功能描述:IC |
| TB2923HQ(O) | 功能描述:音頻放大器 51W x 4-CH class-AB car power 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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