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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： | 5/11页 |
| 文件大小： | 209K |
| 代理商： | TB2921HQ |
TB2921HQ
2006-05-25
3
Caution and Application Method
(Description is made only on the single channel.)
1.
Standby SW Function (pin 4)
By means of controlling pin 4 (standby pin) to
High and Low, the power supply can be set to ON
and OFF. The threshold voltage of pin 4 is set at
about 3VBE (typ.), and the power supply current is
about 2
A (typ.) in the standby state.
Control Voltage of Pin 4: VSB
Standby
Power
VSB (V)
ON
OFF
0~0.5
OFF
ON
2.5~6 V
When changing the time constant of pin 4, check the
pop noise.
Advantage of Standby SW
(1)
Since VCC can directly be controlled to ON or OFF by the microcomputer, the switching relay can be
omitted.
(2)
Since the control current is microscopic, the switching relay of small current capacity is satisfactory
for switching.
VCC
Small current capacity switch
Battery
Stand-By
VCC
From microcomputer
Battery
Stand-By
– Standby Switch Method –
Figure 2
– Conventional Method –
VCC
Large current capacity switch
Battery
VCC
From
microcomputer
Battery
Relay
Figure 1 With pin 4 set to High,
Power is turned ON
ON
4
OFF
10 k
to BIAS
CUTTING CIRCUIT
≈ 2 VBE
VCC
Power
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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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