187. Korea Wellang LED Driver IC - WD35-S28T

197. WD35-S28T is an AC direct LED driver IC with internal 2-step and external 2-step respectively. It can drive several series of LEDs from rectified AC voltage. It will provide great convenience in design because it requires a small number of external components. WD35-S28T has higher LED current driving capability, and its current can be adjusted through external resistors. WD35-S28T will help engineers produce excellent LED lighting products in terms of energy efficiency, design efficiency, cost efficiency, etc.

198. 1. LED Driver IC -199. Features of WD35-S28T:

188. LED driver directly from AC line

189. Wide input range: 90VAC~305VAC

190. Constant current drive with internal 2-channel and external 2-channel

191. Adjustable drive current for each step

192. Compatible with triac dimming

200. Includes bleed current to supply holding current for triac dimmers

201. Includes gate driver to supply latching current for triac dimmers for external MOSFET

202. Excellent triac dimmer compatibility due to holding and latching currents

203. Excellent power factor > 0.9

204. Low total harmonic distortion <15%

205. Over-temperature protection

206. EMI safe operation

207. Thermally enhanced QFN 20-pin

208. 2. LED Driver IC -209. Applications of WD35-S28T:

210. AC direct LED lamp applications

211. Downlights

212. High bay

213. Street lights