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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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PSoC 5LP
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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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Dana,
can you point to a particular part number at TI website?
odissey1
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@Orbitcoms,
we used digital pot in the feedback loop of the switching regulator.
odissey1
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Just interesting Laboratory Power Supplies (in Russian): PowerSupplyUnit_R_20140916.rar
Excellent demonstrates the capabilities of PSoC)))
Source here.
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Here is the digital power supply page of TI -
www.ti.com/lsds/ti/power-management/digital-power-control-solutions-overview.page
Regards, Dana.