LM5066I: Delay time of TIMER pin

Hi Jim,

Larger delay time can be set with higher value of timer cap but we need check whether the design will still have sufficient SOA margin. 

Can you please fill in the requirements in the design calculator and send me for review. The design calculator is available under the product folder.

Does the part has register to process switch on+off. I mean only one command to switch the device on and off.

No.

Best Regards, Rakesh

Hi Rajesh,

Attached calculation.

Is that possible to delay 25s..... Or what the max delay time you suggest?

LM5066I_Design_Calculator_REV_C_P12V_Mitac.XLSX

Hi Jim,

Thanks for the details.

Do you want insertion delay to be 25s or is it restart delay or fault timer period? please confirm

I will review and provide feedback by Monday.

Best Regards, Rakesh

Hi Rajesh,

Re-start delay.

Hi Jim,

The max restart delay possible for this design is 663ms with timer cap of 80nF. Please refer cell F95 in the attachment.

For longer re-start delay, we have to use a microcontroller or delay circuits to control LM5066i on the UVLO/EN after the fault based on the re-start delay requirement.

Best Regards, Rakesh

By the way, why such long restart delay is required ?

Best Regards,