DEAD TIME EFFECT DISTORTION IN SHAKER POWER AMPLFIER

[navnee4]

HOW TO COMPENSATE DEAD TIME EFFECT DISTORTION FOR SHAKER POWER AMPLIFIERS

[darkfenriz]

Impossible, it's been made by engineers abusing capslock.

[navnee4]

how are class-D amplifiers surviving with out dead time compensation for power amplifiers?

[81bas]

they use deep negative feedback

[Eva]

Good class D output stages have high timing precision and almost no dead time

Analyze how and where timing errors are created. Use double trace oscilloscope to compare waveforms and see the delays.

[alexberg]

Originally Posted by Eva

Good class D output stages have high timing precision and almost no dead time

Analyze how and where timing errors are created. Use double trace oscilloscope to compare waveforms and see the delays.

Timing accuracy helps to some extent. The trick is to prevent current flow through the body diode. And the transient process depends on DS capacitance, output current and voltage so DT usually is based on worst case conditions. TI employs particular DC bus inductance to mitigate shoot through.
There are ways to adjust DT automatically, not likely useful for audio... yet.

[darkfenriz]

can you be a bit more specific about dead time generation and gate driving so that we can help.