參數(shù)資料
型號(hào)： 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(wú)濾波器D類音頻功率放大器
文件頁(yè)數(shù)： 12/23頁(yè)
文件大?。?/td> 415K
代理商： TPA2010D1YZF
SLOS417A OCTOBER 2003 REVISED DECEMBER 2003
www.ti.com
12
SUMMING INPUT SIGNALS WITH THE TPA2010D1
Most wireless phones or PDAs need to sum signals at the audio power amplifier or just have two signal sources
that need separate gain. The TPA2010D1 makes it easy to sum signals or use separate signal sources with
different gains. Many phones now use the same speaker for the earpiece and ringer, where the wireless phone
would require a much lower gain for the phone earpiece than for the ringer. PDAs and phones that have stereo
headphones require summing of the right and left channels to output the stereo signal to the mono speaker.
Summing Two Differential Input Signals
Two extra resistors are needed for summing differential signals (a total of 5 components). The gain for each
input source can be set independently (see equations (4) and (5), and Figure 30).
Gain 1
VO
VI1
2 x 150 k
RI1
V
V
Gain 2
VO
VI2
2 x 150 k
RI2
V
V
If summing left and right inputs with a gain of 1 V/V, use R
I1
= R
I2
= 300 k
.
If summing a ring tone and a phone signal, set the ring-tone gain to Gain 2 = 2 V/V, and the phone gain to
gain 1 = 0.1 V/V. The resistor values would be. . .
R
I1
= 3 M
, and = R
I2
= 150 k
.
_
+
IN
IN+
PWM
H
Bridge
VO+
VO
Internal
Oscillator
CS
To Battery
VDD
GND
Bias
Circuitry
RI2
RI2
+
Differential
Input 1
SHUTDOWN
RI1
RI1
+
Differential
Input 2
Filter-Free Class D
Figure 30. Application Schematic With TPA2010D1 Summing Two Differential Inputs
(4)
(5)
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參數(shù)描述
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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