Other Parts Discussed in Thread: LM2596, , LM3409
I want to use this design for one of our upcoming project. I want to control dimming using WiFi or BLE or any other external RF-SOC. I have following requirements.
1. I need 3.3V or 5V power supply. If in this design the auxiliary power supply is available, can somebody help me to find out the pin from which I can take the 3.3V or 5V power out? If no, can i use LM2596 as buck converter to get it from ISO_15V pin or do you suggest any other chip?
2. Dimming input identification: Is EN pin of U15 used for dimming? If yes, It had been directly connected to +50V. Will it not damage the IO (which will be used for PWM generation) of PWM generating circuit? If no, please help me to identify the dimming inputs in this design.
3. What are the output voltages and currents available at VLED1 & VLED2. As this design says '60W, 2-string', does it mean 60W output at each string totaling to 120W or is it 30W at each string?
4. If I want to change VLED outputs to 20W each at both strings, what changes I need to make in the design?