DS90UB933/934 Inrush

Chris Yorkey

Team,

What is the inrush of the new DS80UB933/934 device when PDB is active or the device comes out of reset?

Customer appears to have some voltage droop which causes issues with the resistor select pins for I2C and Mode and therefore, is trying to debug this.

Regards,

Chris (on behalf of customer)

_____

over 9 years ago

0 Mark Sauerwald88474 over 9 years ago

TI__Genius 13475 points

Chris

When PDB goes high, the current consumption of the '933 will go from about 500uA to 50mA, initially this current will be supplied by the bypass capacitors and the power supply network will need to charge be capacitors back up to the proper VDD - the amount of time that this takes will depend on the time constant of the power supply network - including the bypass capacitors for the 933, as well as any series resistors, and inductors in the network.

Mark

0 jacal over 8 years ago in reply to Mark Sauerwald88474

Prodigy 30 points

Hello, Chris

why does my DS90UB934 have not mipi output？
in DVP output mode, everything works fine. then I change to mipi output mode, No matter how I modify the register, it does have any output,
What could be the problem?

0 jacal over 8 years ago in reply to Mark Sauerwald88474

Prodigy 30 points

What could be the problem?

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DS90UB933/934 Inrush