bowman1710
Full Member level 3
Hi guys,
I've modified this board from linear, I have highlighted the things i have changed on this board, from what I have looked at the controller isn't limited by maximum duty cycle and also it is not going into current limit I have tried tweaking the collector resistor with no effect. The issue i have is that at lower loads it outputs 5.3V fine but when it gets above the 10W range the output drops to 5.1V and if I increase the input voltage above 50V it drops even more, any ideas what else I can look at or change?
![modification.png modification.png](https://www.edaboard.com/data/attachments/52/52620-4fe8c1951988781c716f418e6bc6bd0b.jpg)
I've modified this board from linear, I have highlighted the things i have changed on this board, from what I have looked at the controller isn't limited by maximum duty cycle and also it is not going into current limit I have tried tweaking the collector resistor with no effect. The issue i have is that at lower loads it outputs 5.3V fine but when it gets above the 10W range the output drops to 5.1V and if I increase the input voltage above 50V it drops even more, any ideas what else I can look at or change?
![modification.png modification.png](https://www.edaboard.com/data/attachments/52/52620-4fe8c1951988781c716f418e6bc6bd0b.jpg)