UCC24612: Source current

Shuhei Goto

Expert 7120 points

Part Number: UCC24612

Hi team,

Gate resistance in the EVM schematic is 2.2 ohm.
VGH is 9.4 V(typ).

Maximum source current is 1A and it seems smaller than 9.4V/2.2ohm.
Is this no problem?

Best regards,
Goto

5 months ago

0 SIRIPURAM YAMINI 5 months ago

TI__Expert 5485 points

Hi Goto,

You need to add internal resistance too.

Regards,

Yamini.

0 Shuhei Goto 5 months ago in reply to SIRIPURAM YAMINI

TI__Expert 7120 points

Hi Yamini,

What is the specific value of internal resistance?

Best regards,
Goto

0 SIRIPURAM YAMINI 5 months ago in reply to Shuhei Goto

TI__Expert 5485 points

Hi Goto,

Rsource and Rsink (in the datasheet) are the internal resistances.

Regards,

Yamini.

0 Shuhei Goto 5 months ago in reply to SIRIPURAM YAMINI

TI__Expert 7120 points

Hi Yamni,

In other words, is the total source resistance of EVM is the sum of 2.2 Ω and 5.7 Ω, right?

Best regards,
Goto

+1 SIRIPURAM YAMINI 5 months ago in reply to Shuhei Goto

TI__Expert 5485 points

Hi Goto,

Yes.

Regards,

Yamini.

0 Shuhei Goto 5 months ago in reply to SIRIPURAM YAMINI

TI__Expert 7120 points

Hi Yamini,

Then, VG/R= 10.26/(5.7+2.2) = 1.27A. This is larger than Maximum source current is 1A .

Is this no problem?

Best regards,
Goto

0 SIRIPURAM YAMINI 5 months ago in reply to Shuhei Goto

TI__Expert 5485 points

Hi Goto,

VG =10.26V is Max and R source =5.7ohm is typical value, for VG max value , you may not get Rsource as typical value.

Regards,

Yamini.

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UCC24612: Source current