- 您现在的位置：买卖IC网 > PDF目录98166 > TB2921HQ 29 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 PDF资料下载
参数资料
| 型号： | TB2921HQ |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 29 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| 封装： | 1 MM PITCH, PLASTIC, HZIP-25 |
| 文件页数： | 6/11页 |
| 文件大小： | 209K |
| 代理商： | TB2921HQ |
TB2921HQ
2006-05-25
4
2.
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 R1 and C4, 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 3
and Figure 4.)
The pin 22 is designed to operate off 5 V so that the outside pull-up resistor R1 is determined on the basic
of this value:
ex) When control voltage is changed in to 3.3 V from 5 V.
3.3 V/5 V
× 47 k = 31 k
Additionally, as the VCC is rapidly falling, the IC internal low voltage muting operates to eliminate the
large pop noise basically. The low voltage muting circuit pull 200
A 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, R1 at pin 22 should be 47
k
or more.
3.
High-Side Switch
Pin 25 of this device is used in concerned with VCC as a high-side switch which operates with the standby
pin. Thus, both the power amp IC and the connected external unit (the hideaway unit) can be turned
ON/OFF by using of the standby switch.
Figure 4
Mute Attenuation
VMUTE (V)
Pin 22 control voltage: VMUTE (V)
ATT – VMUTE
Mute
a
ttenua
tion
ATT
(dB
)
Figure 3
Muting Function
22
1 k
R1
5 V
Mute ON/OFF
control
C4
0
120
100
80
60
40
20
0
20
0.5
1
1.5
2
2.5
3
VCC = 13.2 V
f
= 1kHz
RL = 4
VOUT = 20dBm
相关PDF资料 |
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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TB2921HQ(O) | 功能描述:音频放大器 50W x 4-CH class-AB car power 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 |
| 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:音频放大器 2ch BTL Audio AMP P-ch N-ch DMOS Out-P 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 |
| TB2923AHQ(O) | 制造商:Toshiba America Electronic Components 功能描述:IC |
| TB2923HQ(O) | 功能描述:音频放大器 51W x 4-CH class-AB car power 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 |
发布紧急采购，3分钟左右您将得到回复。