Hello,
I have to built a current source that controls the current in a coil. I want to built a ripple regulator that measures the current by a hall-sensor and switches the half bridge high side on if the current is too low and switches the half bridge low side on if the current is too high. Dead time to prevent cross-conduction is in the driver.
I need a high switching frequency for small currents (100kHz @ 20A) and a low switching frequency for high currents (20kHz @ 200A). I have to use a current control to have a permanent over current protection.
I want to realize this by adjusting the hysteresis of the comparator. (see
The only schematic I found was this:
PLEASE has someone a schematic of a comparator with adjustable hysteresis for me. Best would be a ground referenced voltage input for the hysteresis adjustment.
THANKS for your help!!!!
Best Regards Harald