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参数资料
| 型号： | TPA0172PWP |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
| 封装： | GREEN, PLASTIC, HTSSOP-24 |
| 文件页数： | 15/36页 |
| 文件大小： | 885K |
| 代理商： | TPA0172PWP |
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TPA0172
2W STEREO AUDIO POWER AMPLIFIER
WITH I2C BUS
SLOS327C AUGUST 2000 REVISED MAY 2001
22
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
SE/BTL operation
The ability of the TPA0172 to easily switch between BTL and SE modes is one of its most important cost saving
features. This feature eliminates the requirement for an additional headphone amplifier in applications where
internal stereo speakers are driven in BTL mode but external headphone or speakers must be accommodated.
Internal to the TPA0172, two separate amplifiers drive OUT+ and OUT. The SE/BTL input controls the
operation of the follower amplifier that drives LOUT and ROUT. When SE/BTL is held low, the amplifier is
on and the TPA0172 is in the BTL mode. When SE/BTL is held high, the OUT amplifiers are in a high output
impedance state, which configures the TPA0172 as an SE driver for LOUT+ and ROUT+. IDD is reduced by
approximately one-half in SE mode. Control of the SE/BTL input can be from a logic-level CMOS source (see
recommended operating conditions for levels) or, more typically, from a resistor divider network as shown in
Figure 25.
The SE/BTL pin also selects the audio input and gain registers. When SE/BTL is held low, the RLINEIN input
is selected and the BTL gain register values are used to set the gain of the input signal. When SE/BTL is held
high, the RHPIN input is selected and the SE gain register values are used to set the gain. Table 5 shows the
operation of the SE/BTL input pin in selecting different modes of operation.
Table 5. SE/BTL Operation
SE/BTL
INPUT
GAIN REGISTER
OUTPUT
Low
Line
BTL
High
Headphone
SE
The external SE/BTL pin may also be disabled and its function controlled through the I2C interface. Refer to the
I2C interface section.
ROUT+
12
R
MUX
RHPIN
RLINEIN
+
18
17
9
RIN
ROUT
14
+
1 k
COUTR
330
F
100 k
SE/BTL
11
100 k
VDD
Figure 25. TPA0172 Resistor Divider Network Circuit
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA0172PWPG4 | 功能描述:音频放大器 Stereo Class-AB 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 |
| TPA0172PWPR | 功能描述:音频放大器 Stereo Class-AB 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 |
| TPA0172PWPRG4 | 功能描述:音频放大器 Stereo Class-AB 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 |
| TPA02 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Power Operational Amplifier |
| TPA0202 | 制造商:TI 制造商全称:Texas Instruments 功能描述:2-W STEREO AUDIO POWER AMPLIFIER |
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