TPS51125: Ton variation

Joe Ji

Part Number: TPS51125

Hi team

When customer test TPS51125, they find the Ton varies from 1600ns to 1800ns , they use Ton12 setting, the typical time interval in DS "DUTY AND FREQUENCY CONTROL" page is 1700ns.

In what range Ton is normal? Are there the upper limit and lower limit.

Thank you

Best regards

Joe

Nov 28

over 2 years ago

0 Peter James Miller over 2 years ago

TI__Guru 56985 points

Joe Ji

I will check to see if we have additional data, but general timing requirements are typically expected to vary +/- 10%

+1 Peter James Miller over 2 years ago

TI__Guru 56985 points

I was able to confirm from test data, +/- 10% variation should be expected. Since the on-time is generated by the VIN and VO voltages at the IC pins, the exact value can also be affected by the values of those voltages, and potentially noise on either pin.

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TPS51125: Ton variation