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參數(shù)資料
| 型號： | TPA2011D1YFFT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 3.24 W, 1 CHANNEL, AUDIO AMPLIFIER, BGA9 |
| 封裝： | 1.21 X 1.16 MM, 0.40 MM PITCH, GREEN, PLASTIC, DSBGA-9 |
| 文件頁數(shù)： | 5/24頁 |
| 文件大?。?/td> | 670K |
| 代理商： | TPA2011D1YFFT |
_
+
IN
IN+
PWM
H
Bridge
VO
VO
+
Internal
Oscillator
CS
ToBattery
VDD
GND
Bias
Circuitry
Differential
Input
TPA2011D1
Filter-FreeClassD
EN
CI
RI
CI
RI
_
+
IN
IN+
PWM
H
Bridge
VO+
VO
Internal
Oscillator
CS
ToBattery
VDD
GND
Bias
Circuitry
Single-ended
Input
TPA2011D1
Filter-FreeClassD
EN
CI
RI
Gain 1 +
V
O
V
I1
+
2 x 150 kW
R
I1
V
Gain 2 +
V
O
V
I2
+
2 x 150 kW
R
I2
V
www.ti.com
SLOS626A – DECEMBER 2009 – REVISED MAY 2010
Figure 29. TPA2011D1 Application Schematic With Differential Input and Input Capacitors
Figure 30. TPA2011D1 Application Schematic With Single-Ended Input
SUMMING INPUT SIGNALS WITH THE TPA2011D1
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 TPA2011D1 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
(4)
(5)
If summing left and right inputs with a gain of 1 V/V, use RI1 = RI2 = 300 k.
Copyright 2009–2010, Texas Instruments Incorporated
13
Product Folder Link(s) :TPA2011D1
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