Quick Reference Guide. Light Emitting Diode (LED) Lighting Applications

Transcription

1 Quick Reference Guide Light Emitting Diode () Lighting Applications APPLICATIONS Power input protection from voltage and current transients Emergency lighting battery protection from overcurrent and heat Liquid Crystal Display (LCD) screen protection from short circuit and overloading of backlighting devices High-voltage protection for Class 2 power supplies used for low voltage lighting fixtures High-temperature protection to extend life in lighting products Electrostatic Discharge (ESD) protection of FEATURES / BENEFITS Helps to protect against damage caused by device malfunctions that can lead to fire or injury Helps lighting manufacturers meet international safety standards Coordinated overcurrent, overvoltage, and hightemperature circuit protection for lighting applications Many product form factors give engineers more design flexibility Compatible with high volume electronics assembly characteristics tuned to lighting electronics needs RoHS and ELV compliant

2 Of all the technologies under development in the lighting world, technology is the one that will radically change the market in the immediate future. This technology is not new. Improved chip designs and materials have allowed for brighter and longer-lasting light sources that can be used in a wide spectrum of applications. Though hold the promise of longer life spans, you must take into account that lifespan depends on a number of factors. The lifespan of an is a function of the junction temperature, operating voltage, and operating current. Product designers need to take extra steps to ensure that these new lighting products are properly protected from an excess of any of these factors. And to ensure that this new technology enjoys the same level of acceptance and consumer confidence as other lighting technologies, product designers need to take extra steps to ensure that their lighting products meet international safety standards. (L) R1 LVR Input Power Supply PolyZen Driver (N) Section A Section B Section C Figure 1 PROTECT THE HEAT MANAGEMENT Driver Problem: Generate Heat Most of the electrical energy supplied to an is changed to heat, not light. If not dealt with, the heat will reduce the s life and alter the quality of the light that is produced. Solution: s Connect a device in series with the to provide overcurrent protection. In addition to overcurrent protection, the device can provide overtemperature protection if it is thermally bonded to the metal core circuit board or heat sink. Figure 2 2

3 (L) Input R1 LVR Power Supply POWER INPUT PROTECTION Problem: Power Line Coupled Transients and Surges Reduce Life Various high voltage events in environments will significantly reduce lifetime. (N) Solution: LVR s and Metal Oxide Varistors A Metal Oxide Varistor () placed across the input helps provide overvoltage protection in the modules. Figure 3 Note: An LVR device could be placed before or after the. Figure 3 is an example of placing an LVR device before the. Many equipment manufacturers prefer protection circuits combining resettable devices with upstream fail-safe protection. R1 in this example is a ballast resistor that forces the worst-case fault current to remain within the specified limits of the LVR. R1 is not a fail-safe protection device. A fuse would be an example of fail-safe protection. DC In PolyZen Driver DRIVER INPUT PROTECTION Problem: Drivers Connected to Improper DC Supply Many drivers are susceptible to destruction by improper DC voltage levels and polarity. Solution: PolyZen s Placing a PolyZen device on the input of the driver helps protect your driver from inadvertent exposure to overvoltage and reverse polarity events. Figure 4 Driver DRIVER CIRCUIT OUTPUT PROTECTION Problem: Driver Output Faults driver outputs may be damaged or destroyed if inadvertently shorted. Solution: s In the event the driver circuit does not require input protection the driver output can still be protected from short circuit or other load anomalies. devices may be used to help protect driver outputs from inadvertent short circuits or other load anomalies. Figure 5 3

4 ELECTROSTATIC DISCHARGE PROTECTION Problem: Subject to ESD (Electrostatic Discharge) ESD damage to an can cause premature failure. Solution: TE Protection If an does not have built-in ESD protection, a protection device placed in parallel with the can help protect against ESD damage. Figure 6 (L) LOW VOLTAGE LUMINAIRES Input (N) LV Output Problem: Assuring Class 2 Power Supplies Meet Safety Standards Using a Class 2 power source in a lighting system can be an important factor for reducing the cost and improving the flexibility of a lighting system. Figure 7 Solution: s and Metal Oxide Varistors Inherently limited power sources - a transformer, power supply, or battery - may have protective devices as long as they are not relied upon to limit the output of the Class 2 supplies. Noninherently limited power sources by definition, have a discrete protective device that automatically interrupts the output when the current and energy output reaches a prescribed limit. TE Circuit Protection provides designers with a wide range of circuit protection devices that help ensure safe operation of Class 2 power sources for lighting applications. As an example, in Figure 7, the addition of an in coordination with a device on an output circuit branch enables a power supply to meet the requirements of UL 1310 paragraph 35.1 overload test on switches and controls. BKLIGHTING FOR LCD SCREENS Problem: Thermal Runaway If the cooling vents in a monitor become blocked, the heat generated by the backlighting can increase and lead to thermal runaway if the driver circuit is a constant voltage or constant luminous flux type. Solution: s Careful consideration must be used to determine an appropriate location to thermally bond the device in the optimum location to interrupt the current in the event the LCD is operated when the vents are blocked in the LCD housing. Figure 8 4

5 INDOOR LIGHTING FUSE GUIDE Power Source Products Region Voltage Surge Requirement DC A Type E Type PAR Type Down Lighting G-globe Candelabra R-reflector MR Type MR Type T8/T5 Tube Power Supply - DC Output (UL1310 Class 2 Power Unit) - Troffer - MR Type North America (USA) Europe/Asia/ Australia Global EPA Energy Star Program Requirements for Integral Lamps (Version 1.4) per IEEE C Category A 2.5kV Ring Wave IEC61547 Equipment for General Lighting Purposes per IEC No Requirement <25W Light Bulb 500V/250A >25W Light Bulb 1kV/500A TE Fuse Recommendation 2410SFV1.00FM/ SFV2.00FM/ SFV1.00FM/ SFV2.00FM/ SFP200F/ SFP250F/ SFP300F/ SFP200F/ SFP250F/ SFP300F/32-2 LIGHTING APPLICATION SOLUTION GUIDE Overcurrent Circuit Protection Overvoltage Circuit Protection Thermal Protection Hybrid Protection s Slow-Blow Chip Fuses Fast-Acting Chip Fuses GDT SESD s RTP s 2Pro s PolyZen s LUMINAIRES Luminaires Low Voltage Voltage Recessed Lighting Track Lighting Underwater RV Portable Luminaires Dimmer X X X X X X X X X X X X X X X X X X SIGNS Channel Letter Changing Message Sign Accessories Power Supplies Drivers CENT LIGHTING Indoor Outdoor IT EQUIPMENT Back-lit Monitors DISPLAY TECHNOLOGY LCD TV LCD Computer Monitor X X X X X X X X X X X INDUSTRIAL AND COMMERCIAL PRODUCTS Stage and Studio X X X X X Emergency X 5

6 FOR MORE INFORMATION TE Circuit Protection 308 Constitution Drive Menlo Park, CA USA Tel : (800) , (650) Fax : (650) (Chinese) (Japanese) Brazil Tel : UK / Ireland / Benelux / Israel / South Africa / France / Italy / Portugal / Turkey / Greece / Spain Tel : Fax : Germany / Austria / Switzerland / Baltic / Eastern Europe / Nordic / Others Tel : Fax : Japan Tel : Fax : Korea Tel : Fax : Taiwan Tel : Fax : China, Hong Kong Tel : Fax : China, Beijing Tel : Fax : China, Shanghai Tel : Fax : China, Shenzhen / Guangzhou Tel : Fax : Thailand / Malaysia / Vietnam Tel : Fax : Singapore / Indonesia / Australia / Philippines Tel : Mobile : Fax : India Tel : Mobile : Part numbers in this brochure are RoHS Compliant*, unless marked otherwise. *as defined Tyco Electronics Corporation, a TE Connectivity Ltd. company. All Rights Reserved. RCP0050E 06/2013 2Pro,, TE Connectivity, TE connectivity (Logo) and TE (logo) are trademarks. Other logos, product and/or company names might be trademarks of their respective owners. While TE has made every reasonable effort to ensure the accuracy of the information in this brochure, TE does not guarantee that it is error-free, nor does TE make any other representation, warranty or guarantee that the information is accurate, correct, reliable or current. TE reserves the right to make any adjustments to the information contained herein at any time without notice. TE expressly disclaims all implied warranties regarding the information contained herein, including, but not limited to, any implied warranties of merchantability or fitness for a particular purpose. The dimensions in this catalog are for reference purposes only and are subject to change without notice. Specifications are subject to change without notice. Consult TE for the latest dimensions and design specifications.