I was looking around on the hypex web site and decided to revisit UcD, so i just drew this quickly in LTspice based on the example diagram: http://i.imgur.com/PiniW.png
Next is to try it in real life, in the simulation with the values shown, the oscillation frequency landed on around 800kHz.
Next is to try it in real life, in the simulation with the values shown, the oscillation frequency landed on around 800kHz.
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Heres a small low power class d running with the UcD concept: IXDD430CI class d - YouTube
And heres an idea of a higher power version using a discrete frontend:
And heres an idea of a higher power version using a discrete frontend:
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Here is an idea for another version: http://i.imgur.com/XdQsy.png
The frontend plugs in into the connector on the left and can be anything you desire, for a clocked design, just omit the capacitor and resistor in series in the feedback loop as these two are the phase lead network for a UcD selfosc topology.
The frontend plugs in into the connector on the left and can be anything you desire, for a clocked design, just omit the capacitor and resistor in series in the feedback loop as these two are the phase lead network for a UcD selfosc topology.
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