Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

TPA2000D1-Q1 Datasheet(PDF) 8 Page - Texas Instruments

Click here to check the latest version.
Part No. TPA2000D1-Q1
Description  2-W FILTERLESS MONO CLASS-D AUDIO POWER AMPLIFIER
Download  19 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

TPA2000D1-Q1 Datasheet(HTML) 8 Page - Texas Instruments

Back Button TPA2000D1-Q1 Datasheet HTML 4Page - Texas Instruments TPA2000D1-Q1 Datasheet HTML 5Page - Texas Instruments TPA2000D1-Q1 Datasheet HTML 6Page - Texas Instruments TPA2000D1-Q1 Datasheet HTML 7Page - Texas Instruments TPA2000D1-Q1 Datasheet HTML 8Page - Texas Instruments TPA2000D1-Q1 Datasheet HTML 9Page - Texas Instruments TPA2000D1-Q1 Datasheet HTML 10Page - Texas Instruments TPA2000D1-Q1 Datasheet HTML 11Page - Texas Instruments TPA2000D1-Q1 Datasheet HTML 12Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 19 page
background image
TPA2000D1Q1
2W FILTERLESS MONO CLASSD AUDIO POWER AMPLIFIER
SGLS137B− SEPTEMBER 2002 − REVISED SEPTEMBER 2004
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
eliminating the output filter with the TPA2000D1
This section explains why the user can eliminate the output filter with the TPA2000D1.
effect on audio
The class-D amplifier outputs a pulse-width modulated (PWM) square wave, which is the sum of the switching
waveform and the amplified input audio signal. The human ear acts as a band-pass filter such that only the
frequencies between approximately 20 Hz and 20 kHz are passed. The switching frequency components are
much greater than 20 kHz, so the only signal heard is the amplified input audio signal.
traditional class-D modulation scheme
The traditional class-D modulation scheme, which is used in the TPA005Dxx family, has a differential output
where each output is 180 degrees out of phase and changes from ground to the supply voltage, VDD. Therefore,
the differential pre-filtered output varies between positive and negative VDD, where filtered 50% duty cycle yields
0 V across the load. The traditional class-D modulation scheme with voltage and current waveforms is shown
in Figure 9. Even at an average of 0 V across the load (50% duty cycle), the current to the load is high, causing
high loss, thus causing a high supply current.
O V
−5 V
+5 V
Current
OUTP
Differential Voltage
Across Load
OUTN
Figure 9. Traditional Class-D Modulation Scheme’s Output Voltage and Current Waveforms Into an
Inductive Load With No Input
TPA2000D1 modulation scheme
The TPA2000D1 uses a modulation scheme that still has each output switching from 0 to the supply voltage.
However, OUTP and OUTN are now in phase with each other with no input. The duty cycle of OUTP is greater
than 50% and OUTN is less than 50% for positive voltages. The duty cycle of OUTP is less than 50% and OUTN
is greater than 50% for negative voltages. The voltage across the load sits at 0 V throughout most of the
switching period, greatly reducing the switching current, which reduces any I2R losses in the load.


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19 


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn