Hello,
As I saw on this post https://e2e.ti.com/support/power-management/f/196/p/571442/2095667 the PTH12040W module can be used as a current source.
The thread was speaking about old posts about 2011 on the subject but I was not able to find them.
How could this module could be use as a current source with an analog consign ? I would be to supply a laser diode in the range 0.8V/5.5V.
Best regards,
Julien
Hi Julien,
The device should be able to, I don't see why not, but that is something we did not test in our end. So, I cannot provide you with an 100% guarantee. Make sure to carefully test before the design is finalized.
With that in mind, the most common approach to using a CV buck converter as a CC buck is to put a current sense resistor, Rsense, between the load and ground (floating load configuration). Then, feed-back the voltage across Rsense instead of the voltage across the load.
I've attached an example below (schematic image) recommending how to wire the module to be used as a current source.
Make sure to calculate the correct Rsense value:
Regards,
Alejandro
