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Led Matrix display drive mosfet question
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Topic: Led Matrix display drive mosfet question (Read 1205 times)
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Apothus
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Led Matrix display drive mosfet question
«
on:
April 02, 2017, 01:44:03 am »
This is my first time building an LED Matrix display.
It will display a simple animation driven by an atmega328p my question is regarding the mosfet architecture. I am a little concerned that I may have missed something with respect to driving the P-Channel fets in particular.
The "Drive" signals are connected directly through microcontroller pin (currently missing 1K current limit resistor in series).
LEDs
http://www.cree.com/led-components/media/documents/CLM4BRKWAKW1087.pdf
P-Channel
https://www.diodes.com/assets/Datasheets/DMP3099L.pdf
N-Channel
https://www.diodes.com/assets/Datasheets/DMG2302UK.pdf
Any tips would be much appreciated.
«
Last Edit: April 02, 2017, 02:37:22 am by Apothus
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Apothus
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Re: Led Matrix display drive mosfet question
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Reply #1 on:
April 04, 2017, 10:10:00 am »
I have decided to pull the trigger and try out this design. Although I decided to drive the p-channel fets from an inverting demux to save some IO pins.
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langwadt
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Re: Led Matrix display drive mosfet question
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Reply #2 on:
April 04, 2017, 10:57:12 am »
pfet is the wrong way around, look at the body diode
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