LM73606: Output protection

Smith Chao

Part Number: LM73606

Hi TI experts,

I use LM73606 for automotive application. Due to the safety concern, does LM73606 have Vout voltage protection if Vout over or under (+10%)

Ex: Vout 3.3V

thanks

Smith

over 2 years ago

0 Arief Hernadi over 2 years ago

TI__Mastermind 23815 points

Hi,

Yes the device have Output Overvoltage Protection as shown on the Electrical Characteristic table of the datasheet

https://www.ti.com/lit/ds/symlink/lm73605.pdf?ts=1621352287278&ref_url=https%253A%252F%252Fwww.google.com%252F#page=7

Thanks

-Arief

0 Smith Chao over 2 years ago in reply to Arief Hernadi

Prodigy 180 points

Hi Arief,

Thanks for your reply.

My PGOOD pin is only pull high instead connected to another pin. You mean that if will "shutdown the chip" or retry if the FB pin occuring +-3%?

thanks

Smith

0 Arief Hernadi over 2 years ago in reply to Smith Chao

TI__Mastermind 23815 points

Hi Smith,

If the FB pin occuring +/-3% then the part will keep on switching since it is below the threshold to engaged either OverVoltage or UnderVoltage condition

Thanks

-Arief

0 Smith Chao over 2 years ago in reply to Arief Hernadi

Prodigy 180 points

Hi Arief,

excuse me. you mean it will keep on switching if FB pin occur over and below +-3%?

Ex: Over +3% or below -3%

thanks

Smith

0 Arief Hernadi over 2 years ago in reply to Smith Chao

TI__Mastermind 23815 points

Hi Smith,

Yes that is correct

Thanks

-Arief

0 Smith Chao over 2 years ago in reply to Arief Hernadi

Prodigy 180 points

Hi Arief,

excuse me. you mean it will keep on switching if FB pin occur over and below +-3%?

Ex: Over +3% or below -3%

What about +-10% of 3.3V?

thanks

Smith

+1 Arief Hernadi over 2 years ago in reply to Smith Chao

TI__Mastermind 23815 points

Hi Smith,
For +/- 3% --> The output will still be switching
For +10% --> Overvoltage case, The output will not be switching
For -10% --> Undervoltage case, The output will be switching at maximum duty cycle

Thanks

-Arief

Power management

Power management forum

LM73606: Output protection