UCC28950: Minimum value eatimation of DMAX parameter

Hidekazu Someno

Part Number: UCC28950

Hi Team,

Dmax of this part has been specified as typ=95%/max=97% on datasheet, but no minimam spec.

Now my Customer would like to estimate the minimum value of this DMAX parameter over temperature range.
How can we estimate it ?
If you have any evaluation(or simulation) data about DMAX parameter over temperature, It will be available to estimate it.

Best regards,
H.Someno

over 6 years ago

0 Colin Gillmor over 6 years ago

TI__Mastermind 25570 points

Hello Someno-san

The minimum value of DMAX is 92% including process and temperature variations. This maximum duty cycle is tied to internal clock pulse width. Because clock pulse width is fixed, the maximum duty cycle at IC outputs depends on operating frequency. TI measures the DMAX parameter at Fsw = 100kHz.

Please let me know if you need any further information.

Regards
Colin

0 Hidekazu Someno over 6 years ago in reply to Colin Gillmor

TI__Expert 5130 points

Colin-san,

Thanks for your reply.
I have one additional question .
What is the basis of 92% as the minimum value of DMAX? Is it actual evaluation data or simulation result?

Regards,
H.Someno

0 Colin Gillmor over 6 years ago in reply to Hidekazu Someno

TI__Mastermind 25570 points

Hello Someno-san

The 92% is based on test results.

Regards

Power management

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UCC28950: Minimum value eatimation of DMAX parameter