TPS63802: TPS63802 TEC Application PWM frequency

user4370495

Part Number: TPS63802

Dear TI:

Custom use tps63802 as TEC application, but i have some confused, can you some advise,thanks?

1, Does Vctrl must be PWM output or DAC will be ok? if must be PWM, what's the requirement? frequency or something else..

2. Custom use PWM (Freq=2MHZ,Duty=15-20%) ,but no output voltage change ,
thanks

over 5 years ago

0 Milos over 5 years ago

TI__Expert 7925 points

Hi,

It doesn't have to be a PWM signal, a DAC can be used as well. Please refer to this application report where different methods are explained in details:
http://www.ti.com/lit/an/slyt777/slyt777.pdf
See the above application report, the duty cycle needs to be changed in large range (depending on the signal voltage) to change the output voltage. Do you see a difference if the duty cycle is changed from 0% to 100%?

Best regards,
Milos

0 Milos over 5 years ago in reply to Milos

TI__Expert 7925 points

Hi user4370495,

We haven’t heard back so we're assuming this answers your question. If not, just post a reply below, or create a new thread if the thread has locked due to time-out.

Thanks and regards,
Milos

0 user4370495 over 5 years ago in reply to Milos

Expert 1155 points

the question has finished ,thanks a lot.

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TPS63802: TPS63802 TEC Application PWM frequency