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参数资料
| 型号： | TB2921AHQ |
| 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： | 12/17页 |
| 文件大小： | 264K |
| 代理商： | TB2921AHQ |
TB2921AHQ
2009-02-03
4
2. Mute Function (pin 22)
The audio mute function is enabled by setting pin 22 Low. R1 and C4 determine the time constant of the
mute function. The time constant affects pop noise generated when power or the mute function is turned on
or off; thus, it must be determined on a per-application basis. (Refer to Figures 3 and 4.)
The value of the external pull-up resistor is determined, based on pop noise value.
For example, when the control voltage is changed from 5 V to 3.3 V, the pull-up resistor should be:
3.3 V / 5 V
× 47 kΩ = 31 kΩ
Figure 3 Mute Function
Figure 4 Mute Attenuation
VMUTE (V)
3. High-Side Switch
Pin 25 of this device is used as a high-side switch to a VCC power supply, which is interlocked with a standby
pin. Thus, the power amplifier IC and the connected external unit (such as the hideaway unit) can be
simultaneously turned on or off by using the standby switch.
22
1 k
Ω
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
= 1 kHz
RL = 4 Ω
VO = 20dBm
BW
= 400 Hz to 30 kHz
Pin 22 control voltage: VMUTE (V)
ATT – VMUTE
Mute
at
tenua
tion
ATT
(dB
)
相关PDF资料 |
PDF描述 |
|---|---|
| TB2921HQ | 29 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| 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 |
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 |
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