cancel
Showing results for 
Search instead for 
Did you mean: 

What's the relationship of LED2001 Dimming (PWM frequency) and LED output current ?

SChan.11
Associate
1 ACCEPTED SOLUTION

Accepted Solutions
Peter BENSCH
ST Employee

Ideally the LED output current is proportional to the duty cycle of the PWM frequency at the input pin DIM.

In reality, however, this depends on several factors which are described in the datasheet of LED2001: frequency, selected inductor and output capacitor, layout.

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Good luck!

/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

View solution in original post

2 REPLIES 2
Peter BENSCH
ST Employee

Ideally the LED output current is proportional to the duty cycle of the PWM frequency at the input pin DIM.

In reality, however, this depends on several factors which are described in the datasheet of LED2001: frequency, selected inductor and output capacitor, layout.

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Good luck!

/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.
SChan.11
Associate

Thanks Peter , our customer bought LED2001 EVB to test DIM performance then will see the relationship between the frequency and duty cycle.

Best regards,

Ekozy Sam