Hello,

Do you realize that the TIP122 and TIP127 have a maximum collector current of 5 Amperes?

Bertus

 

Hi. Please help me. I'm checking hall signal by hand, for example : [ hall A, hall B, hall C] = [1 1 0] or any value. But when I connect into MC33035 at pin 4,5,6 then signal is always [1 1 1], top and bottom drive is always high state. I'm checking a sircuit too, but everything is similar with datasheet. In case, I'm using registor 5w/0.1ohm place 1w/0.05 because I'm don't by 1w/0.05ohm where I live. Any suggestion for problem. MC33035 is die? Thank you for your support.

 

Ok it was a problem with the IC I suppose. I ordered other ones and the circuit works perfectly well. Thanks for the help.

so you just replaced the new ic with the previous ic

 

Your not using Mosfet?
If you use a charge pump IC, IR211o etc, you can use all N channel mosfets.
http://www.masinaelectrica.com/simple-brushless-controller-explained/
Max.

Sir you refered a very good page...
Thanks

 

I have made a driver circuit for a sensored bldc motor using mc33035. This circuit is similar to the application circuit(given in fig.19 and fig 36) in the ic's data sheet. I have used TIP127 and TIP122 as upper and lower gate mosfets respectively. The frequency is determined by a 10kΩ resistor and 10nf capacitor. The current limiting is set for 4.25 A by using a 0.5Ω resistor and voltage reference of 2V given the the op-amp integrated in the given ic.


however I am having problem in starting the motor. The motor does not start on its own for some positions of the the rotor and also once I stop the motor by using brake or by making its speed 0, it does not start on its own. it also starts vibrating at some rotor positions.The motor runs well once i start the motor by hand. The motor has sensors at 120° and is a out-runner motor.

Why am I getting alerts about old threads??? This is not the first one recently. Why does this happen???