SW Regulator doubt

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SW Regulator doubt

Postby tiagosantos » Tue Jan 19, 2010 5:48 am

Do I need to progran any software in Power PSoC in order to use the 5V switching regulator on it?

I`m facing some problems with the SW regulator.
I mounted the SW REG circuit as it show in the PPSoC datasheet. Same components values.
and its not working.
I cant see the SREGSW switching. All I see is a lower VIN value in this pin.

Using this circuit I should have 5V in out, using any VIN value from 7V to 32V ?


I aprecciate your attention.
Thanks!
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Re: SW Regulator doubt

Postby nan358 » Tue Jan 19, 2010 6:07 am

Yes. You have to enable the switching regulator.
settings.gif
settings.gif (10.76 KiB) Viewed 2543 times

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Re: SW Regulator doubt

Postby tiagosantos » Tue Jan 19, 2010 8:50 am

nan358 wrote:Yes. You have to enable the switching regulator.
settings.gif

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Nobu


I did program the PPSoC and its 5V regulator still not working.
I`m expeting to see a rect before the inductor and a ramp (triangular signal) after and then with the capacitors connected I should have the 5V regulated. All I see is a output voltage that is a little bit lower than VIN but not close to 5V.
Also if I change my VIN value the Vout Changes proportionally to VIN.
Example> VIN = 12V Vout = 8 VIN=9V Vout = 6V

There`s no short circuit in my assembly. I checked.
The swithing regulator is Enable on software.
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Re: SW Regulator doubt

Postby nan358 » Tue Jan 19, 2010 1:50 pm

Then there should be some problem about PCB, assembly, or parts being defective.

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Re: SW Regulator doubt

Postby tiagosantos » Tue Jan 19, 2010 4:05 pm

OK more details.

I assembled the circuit again and it does not work as well.
So I use a 5V regulator and powered the VCC PINs of PPSoC. now I can see the switch working.
but without powering up the 5V circuit of power PPSoC nothing happened.

I beliave that the SW REG is not starting well and when it sees the circuit powered it starts working.


Ok now! what am I supposed to do?

please help me. I wanna see the LED lighting! :)
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Re: SW Regulator doubt

Postby yzr » Sun Jan 24, 2010 10:30 pm

Hello,
What version of PSoC Designer do you have?
Some of the previous versions of PSoC Designer do not support the SW regulator correctly. You can update to the latest revision from obtaining a new installer of PD50 at cypress.com.

What is the date code of the PPSoC part? Is this a Cypress kit or a custom board that you have created?
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