Hello
My name is Charlie.
I have 2 questions about LM3405A.
1. I use two LM3405A to drive 2 strings ×3LEDs (total 6 LEDs). In order to prevent the interference of swtiching frequency , how can I make the switching of the two ICs Synchronous ?
2.My Vin=12V, Vout=10.8V , so they both >5.5V. According to the page 10 of datasheet, I have to choose the Figure16 schedematics. what does D3 do in Figure 16 ? To reduce Vin ?
Thanks and best regards.