Hi all,
Following the indications in UCC27282-Q1 datasheet (section 8.2.2.1), I'm calculating the value of bootstrap capacitor.
My input data are:
- VDD = 10V
- Qg (MOSFET gate charge) = 178nC
- Switching frequency = 20KHz
So I selected the 470nF 25V X8R SMD Chip Multilayer Ceramic Capacitor ( Murata GCJ188R91E474KA01 ).
In the previous section 7.3.6 ( Negative voltage transients ), I read that the capacitor from HB to HS has to be with Low ESR, therefore:
- Is my selected capacitor not good for the application?
- Does the bootstrap capacitor has to be electrolitic?
Regards,
Lorenzo