HomeHomeApplicationsApplicationsAC to DC Power ...AC to DC Power ...Thermostat powerThermostat power
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5/1/2015 3:51 AM
 
I have a customer that making a home thermostat and is working on a power stealing circuit right now and any help here would be very appreciated.  The idea is that they need to steal power from the triac control lines going to the furnace… the idea is that they need to draw 10mA 30-60VAC from these lines and use them to power the thermostat… there are three of these AC inputs, and they need galvanic isolation…  let me know if you have any idead on this
 
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5/4/2015 12:07 PM
 
Hi Harry,

For the most simple design, a linear transformer can be used with a 4:1 turns ratio. If the customer requires a switching regulator, the design will be much more complicated, but you can start with the MP020-5 but will need an additional inverter design as well.

Best regards,
David Pannell
Field Applications Engineer
 
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HomeHomeApplicationsApplicationsAC to DC Power ...AC to DC Power ...Thermostat powerThermostat power