Misbehaviour of LED Dimming Circuit

[vikas gupta]

Using the mosfet dimming circuit with MOSFET in series with led and driver and the mosfet circuit is working absolutely fine, as the waveforms say. BUT, I AM GETTING MUCH MORE CURRENT ON 10% PWM THAN ON 100% PWM ACROSS MY LOAD. IS IT THE PROBLEM OF LOAD OR THE DRIVER? I AM USING VTECH BIOTRON COMPANY'S DRIVER WHICH HAS OPTIONAL 0-10V DIMMING (WHICH i AM NOT USING). KINDLY EXPLAIN.