Hi All,
i'm working on a device with couple of peltier cell, power to these cells must be adjustable. Searching on the net and speaking about that with hardware designer o choose (and i want to do that) to control cell power with a voltage control, not pwm control.
To do that i found the SI-8010Y switching regulator. Datasheet attached.
I just bought a couple of 51W cell, specs attached (all what i have).
Looking on regulator datasheet, on tipical connection diagram schematics, i tought to change R1 with a digital potentiometer.
Problem is that a digital potentiometer admit max voltage on its pins equal to Vdd of the component (typical max 5v), this is my problem.
Looking on AAC i found this thread
http://forum.allaboutcircuits.com/threads/0-57v-voltage-control-using-a-digital-pot.26927/
close to the end on the thread an user (in reply #8) post a schematics
http://forum.allaboutcircuits.com/attachments/power-supply-0-57v-png.11741/
that use an opamp to "create" a reference voltare to regulator, in that case lm317. And, that schematics use 3.3v supply for potentiometer that i'll change with digital one.
Can you help me to edit that schematics to my purpose? I'm very good with digital electonics, but with analog... i can't find connection with it
Thanks for reading.
Alberto Beghetto
i'm working on a device with couple of peltier cell, power to these cells must be adjustable. Searching on the net and speaking about that with hardware designer o choose (and i want to do that) to control cell power with a voltage control, not pwm control.
To do that i found the SI-8010Y switching regulator. Datasheet attached.
I just bought a couple of 51W cell, specs attached (all what i have).
Looking on regulator datasheet, on tipical connection diagram schematics, i tought to change R1 with a digital potentiometer.
Problem is that a digital potentiometer admit max voltage on its pins equal to Vdd of the component (typical max 5v), this is my problem.
Looking on AAC i found this thread
http://forum.allaboutcircuits.com/threads/0-57v-voltage-control-using-a-digital-pot.26927/
close to the end on the thread an user (in reply #8) post a schematics
http://forum.allaboutcircuits.com/attachments/power-supply-0-57v-png.11741/
that use an opamp to "create" a reference voltare to regulator, in that case lm317. And, that schematics use 3.3v supply for potentiometer that i'll change with digital one.
Can you help me to edit that schematics to my purpose? I'm very good with digital electonics, but with analog... i can't find connection with it
Thanks for reading.
Alberto Beghetto
Attachments
-
63.9 KB Views: 6
-
75.6 KB Views: 3