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參數(shù)資料
| 型號： | TPA2010D1YZF |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 2.5-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER |
| 中文描述： | 2.5單聲道無濾波器D類音頻功率放大器 |
| 文件頁數(shù)： | 13/23頁 |
| 文件大小： | 415K |
| 代理商： | TPA2010D1YZF |
SLOS417A OCTOBER 2003 REVISED DECEMBER 2003
www.ti.com
13
Summing a Differential Input Signal and a Single-Ended Input Signal
Figure 31 shows how to sum a differential input signal and a single-ended input signal. Ground noise can couple
in through IN+ with this method. It is better to use differential inputs. The corner frequency of the single-ended
input is set by C
I2
, shown in equation (8). To assure that each input is balanced, the single-ended input must
be driven by a low-impedance source even if the input is not in use
Gain 1
VO
VI1
2 x 150 k
RI1
V
V
Gain 2
VO
VI2
2 x 150 k
RI2
V
V
CI2
1
2 RI2fc2
If summing a ring tone and a phone signal, the phone signal should use a differential input signal while the ring
tone might be limited to a single-ended signal. Phone gain is set at gain 1 = 0.1 V/V, and the ring-tone gain is
set to gain 2 = 2 V/V, the resistor values would be
…
R
I1
= 3 M
, and = R
I2
= 150 k
.
The high pass corner frequency of the single-ended input is set by C
I2
. If the desired corner frequency is less
than 20 Hz...
CI2
1
2 150k
20Hz
CI2
53pF
_
+
IN
IN+
PWM
H
Bridge
VO+
VO
Internal
Oscillator
CS
To Battery
VDD
GND
Bias
Circuitry
RI2
RI2
Differential
Input 1
Filter-Free Class D
SHUTDOWN
RI1
RI1
Single-Ended
Input 2
CI2
CI2
Figure 31. Application Schematic With TPA2010D1 Summing Differential Input and
Single-Ended Input Signals
(6)
(7)
(8)
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| TPA2010D1YZFR | 功能描述:音頻放大器 Mono Filter-Free Class-D in WCSP RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA2010D1YZFRG4 | 制造商:TI 功能描述:AUDIO POWER AMPLIFIER |
| TPA2010D1YZFT | 功能描述:音頻放大器 Mono Filter-Free Class-D in WCSP RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA2011D1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3.2W Mono Filter-Free Class-D Audio Power Amplifier With Auto-Recovering Short-Circuit Protection |
| TPA2011D1_12 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3.2W Mono Filter-Free Class-D Audio Power Amplifier |
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