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App note: 12Vac LED Driving without smoothing capacitors

Posted on Sunday, September 10th, 2017 in app notes by DP

an_diodes_an56

Application note from Diodes Incorporated on driving 12Vac LED without smoothing capacitors with their Zetex ZXLD1360 LED driver IC and SBR2A40P1 super barrier rectifier. Link here (PDF)

LED based architectural lighting is now coming of age, but there are still some problems to be considered when designing luminaires to be fitted into existing installations.

This Application Note discusses some of the challenges and shows that the omission of the traditional smoothing capacitors has advantages in saving cost, space and PFC problems.

This entry was posted on Sunday, September 10th, 2017 at 5:00 pm and is filed under app notes. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

One Response to “App note: 12Vac LED Driving without smoothing capacitors”

  1. KH says:

    Important to note that it’s from 2008. Has this line: “About the best that can be done in terms of size and reasonable cost is 2 150uF 20V tantalum capacitors.” Anyone ever seen a tantalum in a LED bulb circuit? Ha ha ha… Even Philips in a recent DP post went cheapo OEM…

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  • Noy: Yuuup
  • KH: I guess this is a failed attempt at making a pass/fail cable tester out of discrete ICs. A single pass/fail LED is not that useful....
  • Max: Considering it only seems to test that all wires conduct, I'm not sure what exactly does this show you that 7 LEDs each powered through...
  • David: Please
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