L6207 PWM Current Control Question

dstetson · ‎2014-07-30

Posted on July 30, 2014 at 19:04

Could someone please explain how current is controlled on the L6207 via onboard PWM Current Controller? Additionally, AN1762 APPLICATION NOTE indicated a constant current could be obtained through a simple voltage divider into Vref.

For example, I want to cap the current at 1.5A / phase, what type of PWM or voltage division would I need to implement?

Thank you.

#l6207

Enrico Poli · ‎2014-08-21

Posted on August 21, 2014 at 14:29

Hello,

the current level is set according to the following formula:

Iphase = Vref/Rsense

where Vref is the reference voltage you set at the REF input and Rsense is the shunt resistor connected between the SENSE pin and ground.

Regards

Enrico