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TPA2005D1DGNR Datasheet(PDF) 14 Page - Texas Instruments

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Part No. TPA2005D1DGNR
Description  MONO Filter-Free Class-D Audio Power Amplifier
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPA2005D1DGNR Datasheet(HTML) 14 Page - Texas Instruments

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0 V
–5 V
+5 V
Current
OUT+
OUT–
Differential
Voltage
Across
Load
0 V
–5 V
+5 V
Current
OUT+
OUT–
Differential
Voltage
Across
Load
Output = 0 V
Output > 0 V
0 V
–5 V
+5 V
Current
OUT+
Differential Voltage
Across Load
OUT–
TPA2005D1
SLOS369G – JULY 2002 – REVISED OCTOBER 2015
www.ti.com
Feature Description (continued)
Figure 33. Traditional Class-D Modulation Scheme's Output Voltage and Current Waveforms Into an
Inductive Load With no Input
9.3.3.3 TPA2005D1 Modulation Scheme
The TPA2005D1 uses a modulation scheme that still has each output switching from 0 to the supply voltage.
However, OUT+ and OUT- are now in phase with each other with no input. The duty cycle of OUT+ is greater
than 50% and OUT- is less than 50% for positive voltages. The duty cycle of OUT+ is less than 50% and OUT- is
greater than 50% for negative voltages. The voltage across the load sits at 0 volts throughout most of the
switching period greatly reducing the switching current, which reduces any I2R losses in the load.
Figure 34. The TPA2005D1 Output Voltage and Current Waveforms Into an Inductive Load
14
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