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Old 02-03-2011, 07:14 PM   #4275 (permalink)
MPaulHolmes
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Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
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Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
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Ya, using 330 Ohm in, 3kOhm out on the hcpl4504 make the controller turn in to a 70kW AM radio noise transmitter. hahaha. But the hcpl4506 works better. Better current transfer ratio. The schematic resistor values were never updated. One reason I like the dspic is that it has programmable dead time and the pwm pins can run in complementary mode (up to 8 pwm channels depending on which one you use). It also has some protection details for complementary output mode on the boundary issues, like when one is of less pwm duty than the dead time and stuff like that.
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