PowerInt LNK457DG Efficient 3.8W Tlemetric LED Driver

Key words: LED driver, LNK457DG, PowerInt, dimming PowerInt's high-efficiency 3.8W dimming PFC LED driver uses LNK457DG in the LinkSwitchTM-PL series, with non-insulated buck topics, input voltage 190Vac to 265VAC, frequency 47 Hz to 63 Hz, 230VAC is more efficient than 83.5%, PF More than 0.91, THD is less than 25%, the starting time is less than 300ms, which is suitable for residential area lighting. This article introduces the main features and indicators, circuit diagrams, materials list, and PCB layout of the 3.8W dimming LED driver. This Document is an ENGINEERING Report Describing a non-isolated Dimmable LED Driver (Power Supply) Utilizing a LNK457DG from The Linkswitch-Pl Family of Devices. The Der-301 Provides a Single Constant Current Output with an Output Power of 3.8 W OUTPUT. The Key Design Goals Were High Efficiency, Dimmable and Compact Size, Enabling The Driver To Fit Into Candelabra And B10 Sized Lamps and Maximize Efficacy. The board was opTImized to operate over the high AC input voltage range (190 VAC to 265 VAC, 47 Hz to 63 Hz). LinkSwitch-PL based designs provide a high power factor (>0.91) meeTIng current internaTIonal requirements. The form factor of the board was chosen to meet the space limitations of standard Candelabra LED replacement lamps. The output is non-isolated and requires the mechanical design of the enclosure to isolate the output of the supply and the LED load from the user. The Document Contains The Power Supply Specification, Schematic, Bill of Materials, Printed Circuit Layout and Performance Data. 2011-12-21 11:16:38 Upload Download attachment (16.55 kB) Figure 1. 3.8W Tlemetric LED Drive Outline 3.8W Taroyable LED Driver Main Features:  SINGLE-Stage Power Factor Corrected and Accurate Constant Current (CC) OUTPUT  DIMMABLE  Low Cost, Low Component Count and Small PCB Footprint  HIGHLY ENERGY Efficient, >83.5% AT 230 VAC Input for 48 V  Fast Start-Up Time (<300 MS) - No Perceptible DELAY  Integrated Protection and Reliability Features  Output Short-Circuit Protected with auto-recovery  Disconnected Load Protection with Auto-Recovery  Auto-Recovering Thermal Shutdown with Large Hysteresis Protects Both Components and PCB  No Damage During Brown-Out Conditions  PF >0.91 at 230 Vac thd <25% AT 230 VAC; 48 V LED  Meets IEC Ring Wave, Differential Line Surge and EN55015 Conducted EMI 3.8W Tarometer Main indicators: 2011-12-21 11:16:38 Upload Download Attachment (42.5 KB) 2011-12-21 11:16:38 Upload Download Attachment (12.54 KB) Figure 2.3.8W Tlemetric LED driver circuit diagram 3.8W Tarometer LED List: 2011-12-21 11:16:38 Upload Download attachment (62.16 kB) 2011-12-21 11:16:38 Upload Download Attachment (28.96 KB) Figure 3.3.8W Tarometer LED Driver PCB top layout map (diameter = .68 "[17.3 mm]) 2011-12-21 11:16:38 Upload Download Attachment (47.78 KB)