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100V to 200V tunable power supply

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shackle000

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Hi everyone,

I want to design a variable bias supply for APD. As APDs require very high bias volatge so my target is to design a step-up converter that can take 5-12V input and deliver tunable 100-200V output. Any suggestions?

Thanks a lot.
 

Hi,
I think, that your more important problem will be to adjust the BiasVoltage enough exact
at i.e. 165V & in sub Volt ranges + make it temperature stabile too...
K.
 

I am using Peltier Cooler for the temperature control. And yes I do need a precise control of the bias voltage. Looking forward to your suggestions.
 

I think, that you need to build a better Step-Up Conv, where is the output voltage(feedback part) to set/adjust through an min. 8 bit DAC (has in 100V delta ca. 0.391V step)_better is of course to use a 10-bit converter...
Or your Uref is to adjust/change over the same way for an output range of 100-200V :)
K.
 

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