We are using MP3304BDD-LF-P for an LCD display and have designed the circuit based on the application diagram given in the datasheet. We are supplying voltage 5V to the IC and 3.3V to enable pin. with all other connections following the datasheet.However, we are not getting PWM signals at the SW pin.
Can someone help us identify the issue? Please assist us in resolving this as soon as possible.
Kindly check attached image of the circuit.
The backlight led specifications are as mentioned in the datasheet.
Kindly find the attached image of the lcd display.
Probably a layout issue, have you tried a demo board?
Schematic and board don’t seem to match. The boost diode D4 looks like it goes to pin 2 on the board but on the schematic it looks like it goes to pin 4.