PowerInt LNK419EG 18W T8 tube light LED driver design

Key words: LED driver, LNK419EG, Powerint, T8 tube lamp PowerInt's 18W replacement T8 fluorescent tube LED driver uses a linkswitchtm-pH series LNK419EG, input voltage 90VAC to 265VAC, output voltage 200V / 90mA. Topology uses single-stage non-isolation buck-boost, compact and low components In the characteristics, the line and load adjustment is 2%, the efficiency of 110VAC is greater than 89.5%, THD is less than 20%, while the efficiency of 230VAC is greater than 90%, THD is less than 28%. This paper introduces the main characteristics, advantages and indicators of Design DER298. , Circuit diagram and material list. Constant Current, Non-ISOLATED Buck-Boost, Power Factor Corrected, 18 W LED Driver Using LinkswitchTM-PH LNK419EGT8 Tube Retrofit LED Driver The document describes a universal, non-isolated, high efficiency, high power factor (PF) LED driver designed to drive a nominal LED string voltage of 200 V at 90 mA from an input voltage range of 90 VAC to 265 VAC. The LED driver Utilizes the lnk419eg from the linkswitch-ph family of iCS. The topology used is a single-stage non-isolated buck-boost that meets the stringent space requirements for this design. Enhanced line and load output current regulaTIon requirement is achieved by directly sensing and regulaTIng the output current. High power factor and low THD is achieved by employing the LinkSwitch-PH IC which also provides a sophisticated range of protection features including auto-restart for open control loop and output short-circuit conditions. Line overvoltage provides extended line fault and surge withstand, and accurate hysteretic thermal shutdown ensures safe average PCB Temperature Under All Conditions. 2012-2-14 12:42:55 Upload Download attachment (16.68 KB) Figure 1.EMI board and antihypertensive - boost plate profile 18W T8 Pipe Light LED Driver (DER298) Main Features:  Designed for Linear Fluorescent LED Tube Retro Fit Applications  Compact, Low Component Count Design - Fits INTO Ends of Tube Enclosure  Frequency Jitter for Smaller, Lower Cost Emi Filter Components  Excellent Line and Load Regulation, <2% Typical  HIGHLY ENERGY Efficient  ≥ 89.5% AT 110 Vac  ≥ 90% AT 230 VAC  Power Factor Corrected  Pf >0.93 Across Line and Load, EN61000-3-2 (c) Compliant  A-THD <28% (230 VAC), <20% (115 VAC)  Integrated Protection and Reliability Features  Output Short-Circuit Protected with auto-recovery  Line Input Overvoltage Shutdown Extends Voltage withstand During Line Faults.  Auto-Recovering Thermal Shutdown with Large Hysteresis Protects Both Components and Printed Circuit Board  IEC 61000-4-5 Ring Wave and Surge and EN55015 B Conducted EMI Compliant 18W T8 Tube Light LED Driver Main Indicators: 2012-2-14 12:42:55 Upload Download Attachment (34.16 KB) 2012-2-14 12:42:55 Upload Download Attachment (24.19 KB) Figure 2.18W T8 tube lamp LED driver circuit diagram 18W T8 tube lamp LED drive material list: 2012-2-14 12:42:55 Upload Download Attachment (99.74 KB) For details, please see: DER298 [1] .pdf (6.77 MB, Downloads: 1) 2012-2-14 12:41:32 Upload Downloads: 1 Download Points: Points - 1