Other Parts Discussed in Thread: LSF0108
Hi Team,
Could you please kindly help to check for LSF0108-Q1 maximum power could be calculated follow by below formula. VCCA=3.3V,VCCB=1.8V. From datasheet shows channel maximum Io=128mA, based on customer requirement they would open 6 channel at the same time. So Pmax=(3.3V-1.8V)*0.128*6=1.152W?
Based on above calculation, customer has some concern for thermal rising, from datasheet it shows the thermal resistor is 74.3W/℃ , and customer ambient temperature would reach to 85℃, so seems the junction temperature may above 150℃.
Question as below:
#1 If the Pmax evaluation is correct?
#2 If we have thermal resistance based on our EVM evaluation result which could provide to customer for reference? Customer PCB board has 8 layer, maybe the thermal resistance would smaller, but we don't have some reference value which could provide to customer for their theory analysis.
Thanks a lot for your support.
Best regards
Jie