Hi,
Need design review of the below design:
Need to know if the FET selected is K, considering the PWM switching frequency is around 200 - 300 KHz. Also, is the inductor selected is good.
Input voltage typical is going to be 48V, output voltage expected is 24V. Here are the LED strips it needs to drive along with the calculator:
5047.TPS92660_Calculator_20220112.xlsx
Sure, will do. What would be the purpose of this capacitor? Also, does the FET look alright? Can you please confirm if the FET will work and also, can you please help go over the LED strip datasheet to check if it will work?
Here is the updated design with the optional capacitor:
Hi,
Got it, will send layout soon. Here is the updated design:
Also the PWM frequency we are using is 20KHZ on 3.3V voltage level, so you see any potential issues?
Hi All,
I took TPS92660EVK and changed the values as shown below:
Changed Q1 on EVK to FDMS86105
Removed Q2 and R6
Changed D1 to BAV20WS-TP
Schematic of EVK:
ISSUE is LED1 is getting just ~18V. Is there any setting that needs to be changed and also, there is no load connected at the output and no PWM connected, just the circuit.
This is blocking our build, and any help ASAP is really really appreciated.
Thanks a ton in advance for the help.
Hi Yuting,
Instead of PWM signal, can I just give voltage between 0.1V to 2.5V on SADJ to see if it varies the brightness? Also, I am not planning to use I2C, since I am planning to use SADJ, do you see any reason to use I2C?
