LM5068: Initial Start-Up Delay

Shinichi Yokota

Genius 9715 points

Part Number: LM5068
Other Parts Discussed in Thread: LM5064

Hello,

I have two questions about LM5068's timer for the initial start-up delay.

What are the Min and the Max values of the V_THVT and the V_TLVT?
- I need these values to estimate the variation of the initial start-up delay of a LM5068 circuit.
When LM5068 re-starts after its shutdown by latch-off or auto-retry, will it be turned on with the same initial start-up delay?

Best regards,
Shinichi Yokota

over 2 years ago

0 Avishek Pal over 2 years ago

TI__Mastermind 30915 points

Hi Shinichi,

Thanks for reaching out. I will check and get back to you tomorrow.

0 Shinichi Yokota over 2 years ago in reply to Avishek Pal

TI__Genius 9715 points

Avishek,

Could you give me feedback quickly?

Best regards,
Shinichi Yokota

0 Avishek Pal over 2 years ago in reply to Shinichi Yokota

TI__Mastermind 30915 points

Hi Shinichi,

Sorry for the delay in getting back to you.

V_{THVT (max)} = 4.056 V,

V_{THVT (min} = 3.922 V,

V_{TLVT (max)} = 1.05 V,

V_{TLVT (min)} = 0.95 V,

The initial delay comes into picture during hot insertion only.

0 Shinichi Yokota over 2 years ago in reply to Avishek Pal

TI__Genius 9715 points

Avishek,

Thanks for your feedback.

Regarding my second question, I heard that LM5064 restarts faster than the initial delay determined by the TIMER pin capacitor C_T right after its shutdown (latch-off or auto-retry). Does the LM5068 behave in the same way?