TPS63000EVM-148: Output current can not large than 200mA

Yuxi Liu(Tony)

Expert 3200 points

Part Number: TPS63000EVM-148

Tool/software:

Hi Tier

My customer get one TPS63000EVM-148 to test our chip.

But customer find that the EVM can not output current when load > 200mA. Then the output voltage will reduce.

Could you give me some suggestion?

Thank you very much.

9 months ago

0 Tao Zhang 9 months ago

TI__Mastermind 32350 points

Hi Paul,

Is it possible caused by current limit of your power source?

Or, if there is a long cable with high DCR that make the input voltage is too low to supply our converter?

Regards

Tao

0 Yuxi Liu(Tony) 9 months ago in reply to Tao Zhang

TI__Expert 3200 points

Hi Tao

Could you give some comment when customer use 500kHz or 600kHz SYNC clock as chip SYNC pin input , Is there any risk? I see 500-600khz is below than the minimum switch freq in chip datasheet. Thank you very much.

0 Tao Zhang 9 months ago in reply to Yuxi Liu(Tony)

TI__Mastermind 32350 points

Hi Tony,

It is out of spec, we canot gurantee anything if SYNC clocks is out of spec.

Regards

Tao

0 Yuxi Liu(Tony) 9 months ago in reply to Tao Zhang

TI__Expert 3200 points

Hi Tao

We are competing with a chip from MPS. Customers need a 500-600kHz synchronous clock input because they are ultrasound applications, and their chips cannot support this frequency. Do we have any way to support it? Or switch to a chip, which will help me win this socket. Cheers

0 Tao Zhang 9 months ago in reply to Yuxi Liu(Tony)

TI__Mastermind 32350 points

Hi Yuxi,

I am afraid we do not have a low Vin buckboost converter to support a such low SYNC clock, could you share the PN of MPS device here?

Regards

Tao

0 Yuxi Liu(Tony) 9 months ago in reply to Tao Zhang

TI__Expert 3200 points

Hi Tao

We tested the Load Transients which condition same as EVM user guide condition(1Mhz SW freq). But we get the peak vout change is 130mV which is different with datasheet (small than 100mV).

Do I need add more output CAP and test again?