Isolated Secondary-Side Lighting LED Controller


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The RT8486 is an isolated secondary-side lighting LED controller designed specifically for lighting fixtures such as E27, GU10, T5 and T8. The IC is suitable for applications that require power line isolation for safety, reliability, high conversion efficiency, as well as high LED current accuracy.

The RT8486 contains 1) a constant current regulating amplifier with 140mV threshold used to program the LED string current with a simple resistor to within 5% LED current accuracy; 2) an over-voltage comparator to protect the output when LED string is open or broken; 3) an opto-coupler driver to control the primary-side of the transformer to complete the system loop.

The RT8486 is offered in the small SOT-23-6 package.


  • Isolated LED Lighting Fixtures
  • E27/GU10/T5/T8
Key Spec.
Status NRND
Recommended Alternative  RT8481
Vin (min) (V) 4.75
Vin (max) (V) 48
Topology Flyback
Current Sense Threshold (mV) 141
Features OVP
Package Type SOT-26
  • Secondary-Side LED Current Regulation
  • 4.75V to 48V Operating Input Range
  • High Accuracy LED Current Threshold Control
  • 0.6mA Operating Current
  • Adjustable LED Current
  • Output Over-Voltage Protection
  • Small SOT-23-6 Package
  • RoHS Compliant and Halogen Free
TitleLast UpdateShareDownload
Isolated Secondary-Side Lighting LED Controller2012/10/31
Technical Documents
TitleLast UpdateShareDownload
Minimizing Light Flicker in LED Lighting Applications2018/08/15