Hi, I have a LM3406HV setup to drive at 1A. What i am getting is an output that is "strobing". Its flashing between 5 and 10Hz, irregullary.. I'd guess its on for about 50% The Dim input is tied High via a pull up resistor so that is unlikely to be the issue. This design was derived from teh Workbench.
The leds that is attached to the outputs ( B+, B- ) are 3 blue leds in series. Vfd = 10.9V. This is arranged to drive 1A.
THere is a low level audiable buzz coming from the circuit.
I am concerned that my PCB layout is not very good. I had made a small error, and have had to hack and attached an airwire into the pcb
What would make the Circuit apparently shut down like this. Because its not a regular flash, i'm wondering if its a currnet limit?
the trace below is the what i'm seeing at the CS pin. It seems to be well exceeding 300mV?
