Digital Controller for 10W Half bridge Power supply

Hi,

I have to design a 10W power supply to convert the 220V mains supply voltage to drive a piezoelectric actuator using half bridge topology.
310V DC link voltage will be switched at 72kHz and resulting square/trapezoidal wave will be applied to piezoelectric actuator at resonance.

I should be able to control the dead-time upto 10us for soft-switching, along with PFC, temperature and output voltage level control. PCB Size requirement is 5cmx 6cm.

Is there any half-bridge controller chip which can be connected with microcontroller to implement some algorithm?

I am looking for some solution similar to this;
**broken link removed**

Some people recommended to use TL494 with a microcontroller.
https://www.edaboard.com/threads/159102/

But I need more better control.

Waiting for the suggestions.

kind Regards

jabbar81 said:

half bridge topology.
...
square/trapezoidal wave will be applied to piezoelectric actuator at resonance.

Click to expand...

This schematic is conceptual. It assumes half-bridge topology means two stacked capacitors connected at one end of the load.

The op amp automatically finds the resonant LC frequency. It's a simulated substitute for a piezo unit.



To handle 310 V you need a different driver circuit than an op amp. It needs to be made with high voltage transistors/mosfets.