TUSB3410

Jim CHEN

Expert 4795 points

Hi Sir,

I want to check why R1 and R2 need to use 90.9K and 100K?

The current have limitation for VDD1V8?

over 8 years ago

0 Elias Villegas M. over 8 years ago

TI__Guru* 76130 points

Hello,
That's correct, there is a current limitation.
regards

0 Hermes Lin1 over 8 years ago in reply to Elias Villegas M.

Intellectual 420 points

HI sir:

customer use 90.9K and 100K in IC Vdd1.8(Pin_4), but have Vdd drop issue. What is the cause of this problem??

customer want to know Vdd1.8 (Pin_4) sink/source current limitation ??

if customer want to use Internal power (VDD1.8V) , Can I provide a reference circuit?? and what is D4 function??

0 Roberto Diaz over 8 years ago in reply to Hermes Lin1

TI__Genius 11255 points

Hello,

To use the internal voltage regulator to 1.8V just set #VREGEN terminal low.

Regards,
Roberto

0 Hermes Lin1 over 8 years ago in reply to Roberto Diaz

Intellectual 420 points

hi sir:
customer use 90.9K and 100K in IC Vdd1.8(Pin_4), but have Vdd drop issue. What is the cause of this problem??

customer want to know Vdd1.8 (Pin_4) sink/source current limitation ??

0 Roberto Diaz over 8 years ago in reply to Hermes Lin1

TI__Genius 11255 points

Hello,

It supports 15mA, please note a 0.1-μF bypass capacitor to VSS is required for proper operation, please verify it is present?

What is the magnitude of the drop that the customer is observing?

Regards,
Roberto

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TUSB3410