Hi everyone
For a project I'm look for a way to limit current on a DC 200V power source. The load resistance is inversely proportional to the current drawn, and is between 30-100k. The current drawn should be between around 1-10mA. A mcu must be able to program the current in some way. Electrical isolation from the MCU is a bonus (opto isolators maybe?).
I've looked at current source IC's and op-amps but the Voltage is too high for these. Do you guys have any ideas on how to tackle this? I'd be very thankful for your help!
For a project I'm look for a way to limit current on a DC 200V power source. The load resistance is inversely proportional to the current drawn, and is between 30-100k. The current drawn should be between around 1-10mA. A mcu must be able to program the current in some way. Electrical isolation from the MCU is a bonus (opto isolators maybe?).
I've looked at current source IC's and op-amps but the Voltage is too high for these. Do you guys have any ideas on how to tackle this? I'd be very thankful for your help!