UCC33420: separated GNDP/GNDS

Hideki Hayashi1

Part Number: UCC33420

Tool/software:

Hi team,

Current datasheet shows below. Why does 6 pin and 12 pin are separated with other GNDP/S? Is it ok to tie to same GND pad?

It seems same GND pad

Best regards,

Hayashi

2 months ago

+1 Steven Mappus1 2 months ago

TI__Mastermind 25915 points

Hayashi,

Just to be clear: UCC33420 is an isolated DC/DC module. GNDP is the primary side return, GNDS is the secondary side return. Yes, pin 6 can be directly connected to pins 3/4/5 and pin 12 can be directly connected to pins 9/10/11.

Steve

0 Hideki Hayashi1 2 months ago in reply to Steven Mappus1

TI__Expert 6940 points

Hi Steven,

Yes I know it is an isolated DCDC module, so GNDS and GNDP must be separated in required creapage and clearance.

Just curious, why are pin 6 is separated with pins 3/4/5?

Regards,

Hayashi

+1 Steven Mappus1 2 months ago in reply to Hideki Hayashi1

TI__Mastermind 25915 points

pin 6 and pin 12 are used as test mode pins.

Steve

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UCC33420: separated GNDP/GNDS