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參數(shù)資料
| 型號： | TB2913HQ |
| 廠商： | Toshiba Corporation |
| 英文描述： | Maximum Power 47 W BTL 】 4-ch Audio Power IC |
| 中文描述： | 最大功率47糯橋接】4通道音頻功率IC |
| 文件頁數(shù)： | 4/15頁 |
| 文件大小： | 328K |
| 代理商： | TB2913HQ |
TB2913HQ(o)
2004-03-01
4
3. Muting Function
(pin 22)
Audio muting function is enabled when pin 22 is Low. When the time constant of the muting function is
determined by R
1
and C
4,
it should take into account the pop noise. The pop noise, which is generated when
the power or muting function is turned ON/OFF, will vary according to the time constant. (Refer to Figure 4
and Figure 5.)
The pin 22 is designed to operate off 5 V so that the outside pull-up resistor R
1
is determined on the basic of
this value:
ex) When control voltage is changed in to 6 V from 5 V.
6 V/5 V
×
47 k
=
56 k
Additionally, as the V
CC
is rapidly falling, the IC internal low voltage muting operates to eliminate the
large pop noise basically.
The low voltage muting circuit pull 200uA current into the IC so that the effect of the internal low
voltage muting does not become enough if the R1 is too small value.
To obtain enough operation of the internal low voltage muting, a series resistor, R
1
at pin 22 should be
47 k
or more.
V
CC
Small current capacity switch
Battery
Stand-By
V
CC
From microcomputer
Battery
Stand-By
– Standby Switch Method –
Figure 3
– Conventional Method –
V
CC
Large current capacity switch
Battery
V
CC
From
microcomputer
Battery
Relay
Figure 5 Mute Attenuation
V
MUTE
(V)
Pin 22 control voltage: VMUTE (V)
ATT – V
MUTE
M
Figure 4 Muting Function
0
120
100
80
60
40
20
0
20
0.5
1
1.5
2
2.5
3
V
CC
=
13.2 V
f
=
1kHz
R
L
=
4
V
OUT
=
20dBm
22
1 k
R
1
5 V
Mute ON/OFF
control
C
4
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TB2915AHQ(O) | 制造商:Toshiba America Electronic Components 功能描述:IC AMP BTL AUDIO 45W 4CH HZIP25 |
| TB2915HQ(O) | 功能描述:音頻放大器 45W x 4-CH high-EFF 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 |
| 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 |
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