Electronics > Beginners
MOSFET HEXFET Help please
andybarrett1:
HI
The reason I was looking to invert the Output was / is I have four of these outputs on the one Pic. So usually in the field we would use 0v as a common then connect the four positive switching voltages.
The hard bit is remembering that 12v is common to all four LEDs
BR
Andy
Zero999:
--- Quote from: Psi on March 20, 2019, 12:22:08 pm ---For loads under 2A i sometimes just go for 2A digital optocoupler IC's or a gate driver IC's.
They increase the power output of the micro pin but keep its ability to source and sink.
Therefore you can use them to drive to GND or to VCC.
Sometimes the fact that you get isolation is handy too.
And because the IC has its own power input you get the option to do level shifting if needed,
--- End quote ---
Be careful, MOSFET driver ICs are not normally specified for continuous operation at the full current. You might need to work out the power dissipation to determine what current can be safely switched continuously.
--- Quote from: andybarrett1 on March 20, 2019, 01:36:28 pm ---HI
The reason I was looking to invert the Output was / is I have four of these outputs on the one Pic. So usually in the field we would use 0v as a common then connect the four positive switching voltages.
The hard bit is remembering that 12v is common to all four LEDs
BR
Andy
--- End quote ---
What's the current rating of the LEDs? How about using an IC?
The TBD62783 has eight channels. If you only need four, then two channels can be connected in parallel to reduce the voltage drop and power dissipation.
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