Hello,
Having dificulty selecting part for constant current buck converter.
Proj. description: to design resistive switching wire heater psu with regulated current. The load resistance is extremely low
Req Specs:
- Load resistance from 0.5 ohm
- Current regulated from 0.2 to 4.0 Amp
- Max output volatge 5V.
- Least possible Voltage ripple
- Maximum effciency for least heat dissipation (will work in sealed/closed/isolated env.)
There are lots of LED driver chips arround but all they have minim voltage requirement while this wire heater would need about 0.1V output to feed 200mA in to 0.5ohm.
