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参数资料
| 型号： | TPA0242PWPG4 |
| 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： | 19/35页 |
| 文件大小： | 806K |
| 代理商： | TPA0242PWPG4 |
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SE/BTL OPERATION
ROUT+
21
R
MUX
RHPIN
RLINEIN
+
23
20
8
RIN
ROUT
16
+
1 k
COUTR
330
F
100 k
SE/BTL
15
100 k
VDD
32-Step
Volume
Control
32-Step
Volume
Control
TPA0242
SLOS287C – NOVEMBER 1999 – REVISED SEPTEMBER 2004
The ability of the TPA0242 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.
Two separate internal 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 device is in the
BTL mode. When SE/BTL is held high, the OUT– amplifiers are in a high output-impedance state, which
configures the device outputs as SE drivers from 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 or, more typically, from a
resistor-divider network as shown in Figure 38.
Figure 38. TPA0242 Resistor Divider Network Circuit
Using a readily-available 1/8-in. (3,5 mm) stereo headphone jack, the control switch is closed when no plug is
inserted. When closed, the 100-k
/1-k divider pulls the SE/BTL input low. When a plug is inserted, the 1-k
resistor is disconnected and the SE/BTL input is pulled high. When the input goes high, the OUT– amplifier is
shut down, muting the speaker (virtually open-circuits the speaker). The OUT+ amplifier then drives through the
output capacitor (CO) into the headphone jack.
26
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| TPA0243DGQRG4 | 2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| TPA0252PWPR | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPA0242PWPR | 功能描述:音频放大器 St 2W Aud Pwr 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 |
| TPA0242PWPRG4 | 功能描述:音频放大器 St 2W Aud Pwr 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 |
| TPA0243 | 制造商:TI 制造商全称:Texas Instruments 功能描述:2-W MONO AUDIO POWER AMPLIFIER WITH HEADPHONE DRIVE |
| TPA0243DGQ | 功能描述:音频放大器 2W Mono Aud Pwr 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 |
| TPA0243DGQG4 | 功能描述:音频放大器 2W Mono Aud Pwr 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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