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TPA3136D2 Fiches technique(PDF) 20 Page - Texas Instruments

No de pièce TPA3136D2
Description  TPA3139D2 10-W Stereo, 3.5-V to 14.4-V, Low-Idle-Current, Inductor Free Class D Amplifier
PDF  41 Pages
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Fabricant  TI2 [Texas Instruments]
Site Internet  https://www.ti.com
Logo TI2 - Texas Instruments

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7.4 Device Functional Modes
7.4.1 MODE_SEL = LOW: BD Modulation
This is a modulation scheme that allows operation without the classic LC reconstruction filter when the amp is
driving an inductive load with short speaker wires. Each output is switching from 0 volts to the supply voltage.
The OUTPx and OUTNx are in phase with each other with no input so that there is little or no current in the
speaker. The duty cycle of OUTPx is greater than 50% and OUTNx is less than 50% for positive output voltages.
The duty cycle of OUTPx is less than 50% and OUTNx is greater than 50% for negative output voltages. The
voltage across the load sits at 0 V throughout most of the switching period, reducing the switching current, which
reduces any I2R losses in the load.
OUTP
OUTN
OUTP
-OUTN
Speaker
Current
OUTP
OUTN
OUTP-OUTN
Speaker
Current
OUTP
OUTN
OUTP
-OUTN
Speaker
Current
0 V
0 V
PVCC
No Output
Positive Output
Negative Output
0 A
0 A
0 V
- PVCC
Figure 7-2. BD Mode Modulation
TPA3139D2
SLOS810A – OCTOBER 2019 – REVISED AUGUST 2020
www.ti.com
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