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Hi all
I need to drive an IR2130 with HCPL outputs , and i have a few queries about it.
Question 1:
it's only for MC33035 Top drive outputs and Led.
About HCPL otpo , what's the best choice, A or B, and why, only cost and place on board ?
See " Choix-Resistances-HCPL2630-150x150.png "
Question 2 :
Now about MC33035 bottom drive output ( pin 19, 20 ,21 ) and HCPL Led.
Bottom drive output values : High level 12,9 -----> 13 V
Low level about 2 V Maxi
Vf for this Led is 1,5V
If = 15 mA maxi for High level
If = 250 μA Low level
Must i need to add 1N 4148 to be lower than 250 μA?
I made ohm's law and found for only one resistor of 1500 Ohm:
( 2 -1,5) / 1500 = 333 μA from which question above.....
Question 3:
Is it mandatory to use a dc/dc converter to power HCPL2630 , or 7805 output will do the job?
Thanks a lot, if anyone could reply me.....
jm
I need to drive an IR2130 with HCPL outputs , and i have a few queries about it.
Question 1:
it's only for MC33035 Top drive outputs and Led.
About HCPL otpo , what's the best choice, A or B, and why, only cost and place on board ?
See " Choix-Resistances-HCPL2630-150x150.png "
Question 2 :
Now about MC33035 bottom drive output ( pin 19, 20 ,21 ) and HCPL Led.
Bottom drive output values : High level 12,9 -----> 13 V
Low level about 2 V Maxi
Vf for this Led is 1,5V
If = 15 mA maxi for High level
If = 250 μA Low level
Must i need to add 1N 4148 to be lower than 250 μA?
I made ohm's law and found for only one resistor of 1500 Ohm:
( 2 -1,5) / 1500 = 333 μA from which question above.....
Question 3:
Is it mandatory to use a dc/dc converter to power HCPL2630 , or 7805 output will do the job?
Thanks a lot, if anyone could reply me.....
jm
