Other Parts Discussed in Thread: TPS92512
Hello,
I have designed LED driver circuit using TPS92512. My requirement is to drive LED with constant current of 535mA at the minimum input of 44V (Typical:48V).
I have LED's with 6.5V of forward voltage drop at 535mA. While testing I observe that current flowing through LED's are on higher side i.e. 570mA and it is varying board to board by 5-6mA
I have used shunt resistor with 1% tolerance and applied 48V constant voltage for all boards. I have followed all layout guidelines as recommended in datasheet
Why output current is not coming as per expectation? error in output current is almost 6-7%
Please find reference schematic given below