UCC2897A: UCC2897A

?? ?

Prodigy 40 points

Part Number: UCC2897A

Tool/software:

Is the bootstrap circuit required even when external power is applied?

10 months ago

0 Steven Mappus1 10 months ago

TI__Mastermind 32775 points

The bootstrap circuit provides a regulated DC voltage to VDD. The DC value of the bootstrap is the amplitude of the gate drive so yes, it is required.

Steve

0 ?? ? 10 months ago in reply to Steven Mappus1

Prodigy 40 points

I mean I will supply DC voltage with external equipment. Then will it be the same?

0 ?? ? 10 months ago in reply to ?? ?

Prodigy 40 points

+ apply DC power to IC directly

0 Steven Mappus1 10 months ago in reply to ?? ?

TI__Mastermind 32775 points

You can apply VDD from an external DC lab power supply. I would recommend to place a diode in series with the connection from V+ to VDD.

Steve

0 ?? ? 10 months ago in reply to Steven Mappus1

Prodigy 40 points

Why do you recommend to place a diode? I think I don't need if I use power supply.

0 Steven Mappus1 10 months ago in reply to ?? ?

TI__Mastermind 32775 points

Good practice that whenever you bias externally, I like to introduce the voltage source through a diode. If you think about a bootstrap winding bias applied to VDD, this is also a voltage bias applied through a diode.

Steve

0 ?? ? 10 months ago in reply to Steven Mappus1

Prodigy 40 points

Is it only because of practice? Then is it able to operate without diode? Is it essential? Sorry for long communication and thank you.

0 Steven Mappus1 10 months ago in reply to ?? ?

TI__Mastermind 32775 points

it will operate with the diode

Steve

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UCC2897A: UCC2897A