PowerInt LNK406EG 14W PWM-analog dimming LED driver

Key words: LED driver, LNK406EG, PowerInt, PWM, analog dimming Powerin's reference design DER263 is a 14W PWM-analog dimming LED driver using a LinkSwitchTM-pH series LNK406EG. The voltage current of the LED string is 28V / 500A. The input voltage ranges from 90VAC to 265VAC, high efficiency, 230VAC PFC greater than 87%. The PFC at 115VAC is greater than 86%, and the power factor is greater than 0.9 to meet the EN61000-3-2 Class C, 1000: 1 dimming range. This article introduces 14W PWM-analog dimming LED driver main features and indicators, circuit diagrams, materials list PCB layout. The document describes a high power-factor secondary referenced, analog dimmable LED driver. The circuit is designed to drive a nominal LED string voltage of 28 V at 500 mA from an input voltage range of 90 VAC to 265 VAC. The LED driver uTIlizes the LNK406EG from the linkswitch-pH family of iCS. Analog dimming is controlled by an external secondary referenced analog control signal of 0-10 V. 0 volts correspond to minimum light output and 10 V corresponds to maximum brightness. The analog controlled signal is transferred to the primary-side and controls the feedback current IFB Of lnk406eg Which in Turn Controls the Output Power / Light Output of the Driver / Light Output of The Driver Factor and low. An Active Load Circuit and Control Are Also include to Extend Dimming Ratio Beyond 1000: 1 But May Be omitted if extended Dimming Operation is not required. This document contains the LED driver specification, schematic, PCB diagram, bill of materials, conducted EMI measurements, thermal measurements, transformer documentation and typical performance characteristics. 14W PWM-analog dimming LED driver main features: High Efficiency, Power Factor Corrected O>87% AT 230 Vac and >86% AT 115 Vac o >0.9 pf, meets EN61000-3-2 Class C 0-10 V Analog Dimming o >1000: 1 Dimming Range Low Cost, Low Component Count And Small Printed Circuit Board Footprint o no current sensing required o Frequency Jitter for Smaller, Lower Cost EMI Filter Components Integrated Protection and Reliability Features o Output Open circuit / Output Short-circuit protected with auto-recovery O Line Input Overvoltage Shutdown Extends Voltage withstand During Line Faults. o Auto-recovering thermal shutdown with large hysteresis protects Both Components and Printed Circuit Board 2012-1-18 12:23:53 Upload Download Attachment (77.39 KB) 2012-1-18 12:23:53 Upload Download attachment (91.37 kB) Figure 1.14W PWM-analog dimming LED drive profile: top view, below: bottom view 14W PWM-analog dimming LED driver main indicators: 2012-1-18 12:23:53 Upload Download Attachment (25.52 KB) 2012-1-18 12:23:53 Upload Download attachment (40.12 kB) Figure 2.14W PWM-analog dimming LED driver circuit diagram 14W PWM-analog dimming LED drive material list: 2012-1-18 12:23:53 Upload Download attachment (114.73 kB) 2012-1-18 12:23:53 Upload Download Attachment (47.2 KB)