Hi,

 

I have been testing the TPS28225 driving a 24V half bridge at 500kHz . However, I will need to be able to reach 100% duty cycle, which is not possible with the classic configuration. I was thinking if I could power the BOOT input with 30V instead of using the bootstrap capacitor. I tried it but it did not work. I did insert a 2 ohms resistor between the 30V and the BOOT input pin. Is there a way to do so, or is the TPS28225 always expect a bootstrap capacitor?

If TPS28225 is not suitable, is there any other half bridge driver I can use?

 

Thanks