Regarding the input voltage to the power jack

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Anonymous
Not applicable

 Dear Sir/madam

   

Application Note - AN76530

   

Heading - PSoC® 1 Automotive Ultrasonic Distance Measurement

   

In the above mentioned application note, on page no - 13, there is a connection for the Power Jack .

   

I just wanted to know that what Input unregulated voltage would be given to this power jack.

   

and wether it would be DC or Ac .

   

Waiting for your solution regarding the same

   

Regards

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ETRO_SSN583
Level 9
Level 9
250 likes received 100 sign-ins 5 likes given

   

 

   

Looks like nominal is 12 V. Max for regulator is 26 V, but that probably exceeds Tj for

   

the regulator under load. You need to calculate load current, and do the thermal analysis

   

to make sure you do not exceed Tj, even though it does have internal thermal protection

   

and short circuit capability.

   

 

   

Regards, Dana.

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Anonymous
Not applicable

The power circuit shown in AN76530 provides provision to connect one of 3 sources -battery (VBAT), supply from DC adapter (PWR JACK) and voltage from another circuit (VIN). If you are using a single source, you don't have to connect D6 and D5.

   

You can either use a battery of 12V or build a unregulated power supply (~12V) (step down transformer -> bridge rectifier). For 5V regulator, you can use most commonly available IC LM7805.

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ETRO_SSN583
Level 9
Level 9
250 likes received 100 sign-ins 5 likes given

One of the bigger challenges, being an automotive application, is handling

   

load dump transients, which the ap note does not address, nor is the ap note

   

power supply circuit adequate in this regard.

   

 

   

en.wikipedia.org/wiki/Load_dump

   

www.ti.com/general/docs/lit/getliterature.tsp

       

 

   

Regards, Dana.

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