LM3466: Can this be used with a non-ground referenced constand current source?

Daniel Rhodes

Part Number: LM3466
Other Parts Discussed in Thread: LM3409

Tool/software:

We are using an LT3475 constant current driver which does not directly connect the LED anode to ground for PWM control. Can I connect this "return" path to the LM3466 and still have it provide current balancing for multiple LED strings?

over 1 year ago

0 Steven Li over 1 year ago

TI__Mastermind 23200 points

Hi Daniel,

Sorry. I am currently out of office. I will reply to you tomorrow when I am back to office. Thanks for your understanding.

Best Regards,

Steven

0 Daniel Rhodes over 1 year ago in reply to Steven Li

Prodigy 70 points

Were you able to take a look at this Steven?

0 Steven Li over 1 year ago in reply to Daniel Rhodes

TI__Mastermind 23200 points

Hi Daniel,

Sorry for the late response.

I do not clearly understand the meaning of "directly connect the LED anode to ground for PWM control" and "this "return" path". Please kindly explain.

You can use LM3466 to work with constant current LED driver with high-side current sensing (so that the LED cathode can be connected to the GND) like LM3409.

Best Regards,

Steven

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LM3466: Can this be used with a non-ground referenced constand current source?