Other Parts Discussed in Thread: LMZ14201H, , TL4242-Q1
I am using the LMZ14201H and LMZ142010H as a power supply in an LED lamp circuit.
The LED string current is controlled by a linear driver at constant current and we use PWM dimming.
The LMZ emits an audible noise when the PWM is set to any value except 100% and the sound intensity increases with the LED current.
The current is 1.4A where the LMZ14202H is used and 700mA where the LMZ14201H is installed (2 different products)
What can be the reason and how we solve it?
Thanks