I am trying to create a schematic for driving two WP154A4SUREQBFZGC RGB LED diodes using ON Semiconductor's CAT3626 and here is my schematic:
and here is proposed circuit from CAT3626's datasheet:
Kingbright's RGB LED Altium's part library was downloaded from SamacSys webpage. Now, I am confused since I've connected anodes to PWM outputs of CAT3626 because I want to control every color of each diode indepedently, but in datasheet there is a connection as we can see from 2nd image Common Anode Configuration. How do I transform my schematic so it will comply with CAT3626 "rules"?
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1\$\begingroup\$ Recommended reading: Rules and guidelines for drawing good schematics. Spend some time on it and it will benefit you greatly. \$\endgroup\$– TransistorCommented Sep 9, 2018 at 20:16
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1 Answer
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Use the common anode WP154A4SEJ3VBDZGW/CA
You selected the common cathode.
answered Sep 9, 2018 at 19:32
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\$\begingroup\$ So, I selected wrong RGB LED itself, am I right? And I need to upgrade schematics with voltage divider for red channel, becuase it needs 2.2 (max 2.8) V? \$\endgroup\$ Commented Sep 10, 2018 at 6:20
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1\$\begingroup\$ Yes, you selected the wrong LED. You should not need to treat the red any differently. Each output channel (A,B, and C) the current is programed individually. It's a current regulator so as long as Vout is sufficient (greater than max Vf) for all three channels the forward voltage does not matter. \$\endgroup\$ Commented Sep 10, 2018 at 12:41