Hi fnds...
I have maintain constant current @ the different load in boost converter ..... i want to maintain 40mA ..? kindly tell me any ideas...




Mod Edit :
Please don't hijack other member's post, now you have your own.
This thread was split from : DC to DC Boost Converter - 12V to 96V at >9 amps

 

You'll get a much better response if you start your own thread and ask a detailed question. Details should include limits in the load difference, voltages, currents (not just difference in currents) any relevant drawings, schematics and any work you've done so far. Plus some things I'm probably forgetting.

 

Pick/build one with an appropriate feedback loop.

 

For starters, post the schematic for your regulator.

 

Input voltage range?
Output voltage range?
Isolated / non-isolated?
Load?
Transient response?
Constant-current regulator, or a constant-current add-on to a standard voltage regulator?
SCHEMATIC?
ak

 

i need out put 80v @50mA it's possible,.....with different load ....

 

i need out put 80v @50mA it's possible,.....with different load ....

The first thing you need to do is get it straight in your mind what you want. Do you want constant current? Or do you want current limited to a maximum?

 

The step up regulator wiring is odd. Did you read the datasheet/appnote? It's more typical to put the current limiting resistor between pins 6 and 7 on the regulator. Your circuit has those two pins shorted and has 0.22ohm resistors scattered about willy nilly.