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dstetson
dstetson
Visitor II
July 30, 2014
Question

L6207 PWM Current Control Question

  • July 30, 2014
  • 1 reply
  • 542 views
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
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1 reply

Enrico Poli
Enrico Poli
ST Employee
August 21, 2014
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

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