I've built the ±70V isolated flyback converter circuit using the LT3511 IC, based on the application example provided in its datasheet. My goal is to use this power supply to drive a voltage-to-current converter that needs to source up to 2 mA into loads as high as 30 kΩ.
When I test the converter without any load, I only get about ±40V at the output. When I add a load, the voltage drops even further. I’m not sure what’s going wrong.
I simulated the circuit in LTspice, and it performs as expected. The measured voltages on the actual IC pins also closely match those in the simulation, so I’m having trouble pinpointing the issue.
How should I go about troubleshooting this? What could cause this kind of voltage drop, and how can I ensure that I get a stable ±70V output across the expected range of load conditions?
When I test the converter without any load, I only get about ±40V at the output. When I add a load, the voltage drops even further. I’m not sure what’s going wrong.
I simulated the circuit in LTspice, and it performs as expected. The measured voltages on the actual IC pins also closely match those in the simulation, so I’m having trouble pinpointing the issue.
How should I go about troubleshooting this? What could cause this kind of voltage drop, and how can I ensure that I get a stable ±70V output across the expected range of load conditions?
