Tool/software:
Hi Zhiqian,
Please review the schematic with single Vcsel LED.
Samsung changed from dual IR LED to single Vcsel LED due to single LED open protection.
They need to make sure C12 for and R2 & R3 value for OVP.
if you have calculation sheet, please share it with me.
VCSEL = VF 1.9~2.6V
input voltage = 8.5V ~ 16
Best regards
Joey Kim