LED protectors enhance overall light engine efficiency
Время обновления: 2019-12-20 21:39:04
Littelfuse has introduced an addition to the company’s PLED Open LED protection devices line. The PLEDxSW Series LED Protector, unlike earlier PLED devices from Littelfuse that had black molded bodies, is molded from a white material, which makes it less noticeable in LED fixtures, particularly for indoor applications. It also reflects more light to improve overall light engine efficiency.
This device provides an electronic shunt path when an LED in an LED string fails as an open circuit. PLED devices are connected in parallel with each LED in a series string. If one LED fails as an open circuit, the PLED connected to it turns on and carries the current that would have gone through the failed LED. This keeps the rest of the string operating, so only a single LED goes dark rather than the whole string.
PLEDxSW Series LED Protectors are compatible with 1-, 2-, and 3-watt LEDs. Their low-profile, small-footprint package dissipates heat efficiently, so they’re ideal for use in dense board applications. In contrast with earlier open LED protection solutions such as silicon controlled rectifiers (SCRs) and zener diodes, they offer higher reliability and lower maintenance requirements. For example, SCRs are usually large and require additional components like resistors to set the trigger or turn-on voltage, and their trigger voltage will vary widely over temperature. Zener diodes create additional power dissipation once the LEDs they’re protecting fail open. They are also not rated for large DC currents, which can shorten life or lead to catastrophic failure.
Typical applications of PLEDxSW Series LED Protectors include protection of lighting products that incorporate strings of high-brightness LEDs, including indoor lighting, aircraft/runway lights, and advertising signage.
PLEDxSW Series LED Protectors offer these key design benefits:
? Protector is less visible in the LED fixture; reflects more light to enhance overall light engine efficiency
? Remainder of LED string can continue to function even if one LED fails as an open circuit
? Standard SMB package provides layout flexibility; maximum heat dissipation makes it ideal for dense board applications
? Low maintenance, high reliability
? Environmentally friendly product
Availability
PLEDxSW Series LED Protectors are available in quantities of 2,500 in tape and reel packaging. Samples are available now for bulk orders; sample requests can be placed through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit Littelfuse.com.
Предыдущий: Silicon Labs SNAP Enabled Programmable XCVR Development Tools
Ratings and Reviews
Связанные специальные
-
DST860S
Littelfuse
Diode Schottky 60V 8A 3-Pin(2+Tab) TO-27 > -
EC103A
Littelfuse
SCRs - > -
2N6075AG
Littelfuse
Sensitive Gate Triacs Silicon Bidirectio > -
2N6073AG
Littelfuse
Sensitive Gate Triacs Silicon Bidirectio > -
1206L450SLWR
Littelfuse
Resettable Fuses 6V POLYFUSE 1206 LoRho > -
1206L050-C
Littelfuse
PTC Resettable Fuses 6V .5A-HD 40A MAX > -
1206L050/15
Littelfuse
1206L Series > -
1206L020YRT
Littelfuse
Resettable Fuses - PPTC 15V .2A .05s > -
1.5SMC62A
Littelfuse
Silicon Avalanche Diodes - 1500W Surface > -
1.5SMC550CA
Littelfuse
Silicon Avalanche Diodes - 1500W Surface > -
1.5SMC350A
Littelfuse
TVS Diodes - Transient Voltage Suppresso > -
1.5SMC20A
Littelfuse
TVS Diodes - Transient Voltage Suppresso > -
1.5SMC18AT3G
Littelfuse
1500 Watt Peak Power Zener Transient Vol > -
1.5KE91CA
Littelfuse
Silicon Avalanche Diodes - 1500 Watt Axi > -
1.5KE36A
Littelfuse
FLKM 40,TVS Diodes - Transient Voltage S >
Горячие акции
Больше- 1.5KE300A
- 1.5KE300
- 1.5KE18A
- 1.5KE16AG
- 1.5KE15CA
- 1.5KE130A
- 1.5KE120CA
- 0FHM0001ZXJ
- 0FHM0001XP
- 03453LS1H
- 03440024H
- 03400313Z
- 03400267Z
- 02981001ZXT
- 02980900Z
- 02810005H
- 0251.500NAT1L
- 0251.062MAT1L
- 0242.100UR
- 0242.050UAT1
- 021806.3HXP
- 021801.6MXP
- 0218004.MXP
- 0218.100MXP
- 021706.3HXP
- 0217008.MXP
- 0217005.MXP
- 021606.3MXP
- 0216008.MXP
- 0216002.MXP
- 0216002.HXP
- 0215020.MRET1P
- 0215010.MXEP
- 0215005.MXEP
- 0215.250MXP
- 0160004.MR
- 01550430ZXU
- 01550020ZXU
- 0154003.DRT
- 0154.250DR
- 01530002H
- 01500274Z
- 01220090Z
- 01110501H
- 00300210N