Martynas Jankūnas
Newbie level 6
![Newbie level 6](/styles/images/ranks/blevel3.gif)
Hello,
I want to make the electronic speed controller for sensorless BLDC motor. I came across driver chip for this aplication from Microchip: **broken link removed**. Max current for this chip is 1A and I want to drive a motor with max 10A current. So I made a schematic in which MTD6505 outputs is fed to **broken link removed** MOSFET driver, which drives **broken link removed** NMOS transistors.
So problem is I don't know how to make a feedback to MTD6505 outputs for zero crrosing detection. I suppose direct connection, which I made in the schematic, isn't a good idea![Big grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Also what value should be MOSFET's gate resistors?
![ESC.png ESC.png](https://www.edaboard.com/data/attachments/55/55176-85a8f452b1f1ed57f1812b285503858f.jpg)
I want to make the electronic speed controller for sensorless BLDC motor. I came across driver chip for this aplication from Microchip: **broken link removed**. Max current for this chip is 1A and I want to drive a motor with max 10A current. So I made a schematic in which MTD6505 outputs is fed to **broken link removed** MOSFET driver, which drives **broken link removed** NMOS transistors.
So problem is I don't know how to make a feedback to MTD6505 outputs for zero crrosing detection. I suppose direct connection, which I made in the schematic, isn't a good idea
Also what value should be MOSFET's gate resistors?
![ESC.png ESC.png](https://www.edaboard.com/data/attachments/55/55176-85a8f452b1f1ed57f1812b285503858f.jpg)