TPL5110: the question of DELAY/M_DRV

Julian Chen

Part Number: TPL5110

Dear E2E,

1. May I know if DELAY/M_DRV pin (pin3) connect to VDD, the MOS will turn on forcibly (Means DRV goes low), right?

2. As the same condition, When DELAY/M_DRV pin (pin3) connect to VDD, IC don't count time, so don't reset the count, right?

3. Could I use the design as below?

When Signal goes high, DRV goes low forcibly (MOS Turn ON)

When Signal goes low, pin 3 calculate the time and start to count

over 7 years ago

0 Julian Chen over 7 years ago

Expert 2550 points

Add a question, if DELAY/M_DRV pin (pin3) connect to VDD, Does IC pin 4 (Done) will ignore the GPIO signal?

0 Shawn Han over 7 years ago in reply to Julian Chen

TI__Genius 9920 points

Hi Julian,
I had forward your question to our application engineer in US. He will reply you later.
Thank you for your patience.

Regards,
Shawn

0 Lane Boyd over 7 years ago in reply to Shawn Han

TI__Genius 16845 points

Hi Julian,

A1. Yes, your understanding is correct.

A2. If you have a valid VDD pulse on M_DRV signal, the IC will not count time. For a pulse to be valid, it must be at least 20ms long. The pulse is ignored if DRV is already low; if the pulse is ignored, the IC will count time.

A3. I recommend using a PMOS instead of NMOS.

Kind regards,
Lane Boyd

0 Julian Chen over 7 years ago in reply to Lane Boyd

Expert 2550 points

Dear Lane,

Thanks for your reply.

I have one more question.

If DELAY/M_DRV pin (pin3) connect to VDD, Does IC pin 4 (Done) will ignore the GPIO signal?

Thanks!

0 Lane Boyd over 7 years ago in reply to Julian Chen

TI__Genius 16845 points

Yes; if DELAY/M_DRV is connected to VDD, then DONE will ignore the GPIO signal.

Kind regards,
Lane

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TPL5110: the question of DELAY/M_DRV