TPS61500 max duty cycle and minimum off time requirement

Mahendra Patel1

Other Parts Discussed in Thread: TPS61500

Hello All,

As per TPS61500 datasheet, maximum duty cycle of the device is 89% (min spec) for Rfreq = 80k.

Also Tmin_on = 60ns, what is the Tmin_off requirement?

Can we get duty cycle >91% at lower switching frequency? Is there a way by which we can ensure that duty cycle >91% will be achieved under all condition?

Regards,

Mahendra

over 10 years ago

0 Mahendra Patel1 over 9 years ago

TI__Expert 3560 points

Any update on this?

0 Helen chen over 9 years ago in reply to Mahendra Patel1

TI__Mastermind 40080 points

Mahendra,

I also replyed on E2E so that others can see my reply:

In order to get higher than 91% minimum Dmax duty cycle, the operation ferquency should be low than 500kHz. If the operation frequency is 200kHz, then the TPS61500 can achieve 93% minimum Dmax duty cycle.

The minimum Toff is not a fixed value, it changes with the frequency.

BR,

Helen

Power management

Power management forum

TPS61500 max duty cycle and minimum off time requirement