Hi there,
This is causing me a bit of grief. I have a linear regulator.. in this instance its the LT1083. I have a pre-regulator using a TL494. I can alter the voltage of the regulator by adjusting the pulse width from ~30volts to ~1.5 volts.
The linear regulator is downwind of the switching converter. If I change the voltage on the converter say from 20volts to say 10volts.. how can I force the LT1083 to output a voltage ~1.5volts lower than any voltage it sees at its input??
Effectively making the LT1083 a slave to its input voltage....
There must be a simple way to bias the ADJ pin based on the the input voltage?
I would appreciate any and all comments on this... hoping for someone to help here.
Kind regards
Simon
This is causing me a bit of grief. I have a linear regulator.. in this instance its the LT1083. I have a pre-regulator using a TL494. I can alter the voltage of the regulator by adjusting the pulse width from ~30volts to ~1.5 volts.
The linear regulator is downwind of the switching converter. If I change the voltage on the converter say from 20volts to say 10volts.. how can I force the LT1083 to output a voltage ~1.5volts lower than any voltage it sees at its input??
Effectively making the LT1083 a slave to its input voltage....
There must be a simple way to bias the ADJ pin based on the the input voltage?
I would appreciate any and all comments on this... hoping for someone to help here.
Kind regards
Simon