R2A20135 is LED lighting controller IC with dimming function. High accuracy LED current feed-back system makes more efficient LED performance. With non-Isolation step-down control makes it possible to reduce external parts and realize high power factor and efficiency. Moreover, this IC builds in the dimming function and can control many types dimming mode such as Triac, PWM, and DC dimming. Switching mode can chosen Zero Current detect Mode or Fixed Frequency Mode according to the required features. By the Constant On Time control, both modes have power factor correct function. Zero Current detect Mode is better performance for noise immunity, and Fixed Frequency Mode is for power factor correction and THD.


  • Absolute Maximum Ratings Supply voltage Vcc: 24 V Junction temperature Tj: –40 to +150°C
  • Electrical characteristics UVLO operating start voltage VH: 12 V ± 0.8 V UVLO operating shutdown voltage VL: 9.2 V ± 0.7 V UVLO hysteresis voltage Hysuvl: 2.8 V ± 0.7 V
  • Functions Dimming function (Triac, PWM, DC dimming) Zero current detection mode (when Rrt is OPEN) Fixed frequency mode (when Rrt is connected by GND) Adjustable switching frequency (when Rrt is connected by GND) Package lineup: Pb-free SOP-8 (JEDEC)

Product Options

Part Number Part Status Pkg. Type Carrier Type Buy Sample
Active SOP Reel


Title language Type Format File Size Date
Datasheets & Errata
R2A20135SP Datasheet (LED Lighting Power Controller) 日本語 Datasheet PDF 284 KB
Application Notes & White Papers
R2A20135EVB-ND1 (Critical Conduction Mode) R2A20135 Evaluation Board for Dimmable LED Lighting Application 日本語 Application Note PDF 589 KB
R2A20135EVB-ND1 R2A20135 Evaluation Board 日本語 Application Note PDF 416 KB
R2A20135SP Application Note 日本語 Application Note PDF 103 KB
The Art of Lighting Flyer PDF 2.22 MB