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PSoC 5, 3 & 1

DaHu_285096
Contributor II

 Hi,

   

I have an application that is based on a 5LP that requires a programmable power supply for part of the circuit.

   

The input voltage is fixed between 12V and 24V DC. I need to provide part of the circuit with adjustable voltage from 5V to 9.5V DC (1Amp max).

   

I am considering using the DAC to op amp and driving the adjut pin of an LM317 but don't really want to need a large heatsink.

   

I also looked at controlling the feedback of switching regulator IC?

   

The adjustments do not need to be fine, 16 levels (4 bits) would be fine. I thought maybe I could have 4 x binary weighted resistors in feedback loop of SMPS IC but maybe there is a common way of solving this that you guys have used successfully? Or know of an IC that would accept DAC or binary inputs for control.

   

Thanks for any suggestions.

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5 Replies
ETRO_SSN583
Esteemed Contributor

TI (now also NSC) have controlled switching solutions, take a look

   

here (consider contacting their FAE as well) -

   

 

   

www.ti.com/lsds/ti/analog/powermanagement/power_portal.page

   

 

   

Regards, Dana.

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odissey1
Honored Contributor II

Dana,

   

can you point to a particular part number at TI website?

   

odissey1

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odissey1
Honored Contributor II

@Orbitcoms,

   

we used digital pot in the feedback loop of the switching regulator.

   

odissey1

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EvPa_264126
Valued Contributor II

 Just interesting Laboratory Power Supplies (in Russian):  PowerSupplyUnit_R_20140916.rar
 Excellent demonstrates the capabilities of PSoC)))
 Source here.

   
        
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ETRO_SSN583
Esteemed Contributor

Here is the digital power supply page of TI -

   

 

   

www.ti.com/lsds/ti/power-management/digital-power-control-solutions-overview.page

   

 

   

Regards, Dana.

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