Higher-order piecewise linear constant current IC SDS3108 fourth generation of optoelectronic integrated solutions for linear Product Description: SDS3108 is a higher-order piecewise linear constant current driver chip, based on changes in the level of full-wave rectified voltage, dynamic adjustment of LED lights number wick, and higher-order segmentation technology through patents, the linear constant current order is subdivided into 23 bands, making the LED string voltage envelope with a full-wave rectified waveform exact match, drive efficiency can reach 95%, single chip provides 8 ~ 25W power output. SDS3108 dynamic configuration using patented technology, LED light strings can be changed dynamically according to the topology of the full-wave rectified voltage: When the full-wave rectified voltage is low, the plurality of LED string lights in parallel; the higher the voltage, LED wick all series lit. By using dynamic configuration technology, SDS3108 improve the utilization of the wick, and direct support 80V ~ 260V wide voltage applications. SDS3108 using patented technology initiative to fill the valley, the valley fill capacitor in a certain amount of charge stored, when the full-wave rectified voltage falls too close to zero, the valley fill capacitor discharge LED string lights, ensure that the entire cycle of string lights rectifier output light efficiency constant, thereby eliminating flicker 100Hz. SDS3108 integrated switch dimming function, by ordinary wall switch enables rapid opening and closing of three dimming (from 100% to 50% to 25%), two dimming (from 100% to 0.5%) or stepless dimming function . SDS3108 integrated digital dimming function, the main chip single-wire SDQ write command protocol, enabling real-time dynamic changes in lighting brightness. Product Features: - Advanced linear segments, the output power of 8 ~ 25W - High Efficiency: 95% @ 220V, the entire lighting efficiency switching power supply superior solutions - 80V ~ 260V wide voltage operating range - PF value> 0.8 - open light dimming digital dimming interface - Overcoming 100Hz flicker - Current precision <± 3% - Temperature compensation and overvoltage protection applications: - LED Fluorescent T5 / T8 / T10, and other specifications 8w / 16w / 18w / 25w / 36w - LED Ceiling , lamp 8w / 12w / 18w / 25w / 36w -? LED bulb 7w / 8w / 9w / 10w / 11w / 12w / 14w -? LED Downlight 7w / 8w / 9w / 10w / 11w / 12w / 14w - LED lights, lights 20w / 30w / 50w - LED Panel Light 15w / 22w / 36w chip type package minimum input voltage maximum input voltage Maximum output power Maximum output current output current accuracy Power Factor efficiency SDS3108 ESOP16 90V 150V 25W 120mA ± 3% 0.98 95%