Hello,
I need to make 24 Volt form an input Voltage starting from 4 Volt and max input Voltage is 35 Volt. I have been testing with the LM3481 in SEPIC mode but this was not working very well. Very, very hot FET; could not solve the issue. Have spent a lot of time but no luck. Also posted this issue at this forum.I tried different type of FETs and changed the coils with models with higher current.
What dit work was the LM2587. This simple switcher picks up smooth at 4 Volt and works its way up to 24 Volt. But the output current is nog enough. I need an 11 amps at 24 Volts.
The variable Voltage input ( 4-35 Volt) is capable of delivering the 11 amps current from 14 Volts input. Below 14 Volts the currrent decreases rapidly.
So any ideas how to solve this or are there components available to make such an wide input step up at this high current rate?
regards,
rob van vreden