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Title: Zener diode protection network in submount for LEDs connected in series

Abstract

A transient voltage suppressor circuit is disclosed for a plurality (N) of LEDs connected in series. Only one zener diode is created for connection to each node between LEDs, and a pair of zener diodes (the “end” zener diodes) are connected to the two pins (anode and cathode pads) of the series string. Therefore, only N+1 zener diodes are used. The end zener diodes (Q1 and Qn+1) effectively create back-to-back zener diodes across the two pins since the zener diodes share a common p+ substrate. The n+ regions of the end zener diodes Q1 and Qn+1 have the highest breakdown voltage requirement and must be placed relatively far apart. Adjacent n+ regions of the intermediate zener diodes have a much lower breakdown voltage requirement so may be located close together. The zener diodes may be placed within a very small footprint or can be larger for better suppressor performance.

Inventors:
; ;
Publication Date:
Research Org.:
Lumileds Lighting U.S., LLC, San Jose, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1531848
Patent Number(s):
8,400,064
Application Number:
12/556,054
Assignee:
Koninklijke Philips Electronics N.V. (Eindhoven, NL); Philips Lumileds Lighting Company, LLC (San Jose, CA)
DOE Contract Number:  
FC26-08NT01583
Resource Type:
Patent
Resource Relation:
Patent File Date: 2009-09-09; Related Information: This invention was made with Government support under contract DE-FC26-08NT01583 awarded by DOE. The Government has certain rights in this invention.
Country of Publication:
United States
Language:
English

Citation Formats

Wei, Yajun, Collins, III, William D., and Steigerwald, Daniel. Zener diode protection network in submount for LEDs connected in series. United States: N. p., 2013. Web.
Wei, Yajun, Collins, III, William D., & Steigerwald, Daniel. Zener diode protection network in submount for LEDs connected in series. United States.
Wei, Yajun, Collins, III, William D., and Steigerwald, Daniel. Tue . "Zener diode protection network in submount for LEDs connected in series". United States. https://www.osti.gov/servlets/purl/1531848.
@article{osti_1531848,
title = {Zener diode protection network in submount for LEDs connected in series},
author = {Wei, Yajun and Collins, III, William D. and Steigerwald, Daniel},
abstractNote = {A transient voltage suppressor circuit is disclosed for a plurality (N) of LEDs connected in series. Only one zener diode is created for connection to each node between LEDs, and a pair of zener diodes (the “end” zener diodes) are connected to the two pins (anode and cathode pads) of the series string. Therefore, only N+1 zener diodes are used. The end zener diodes (Q1 and Qn+1) effectively create back-to-back zener diodes across the two pins since the zener diodes share a common p+ substrate. The n+ regions of the end zener diodes Q1 and Qn+1 have the highest breakdown voltage requirement and must be placed relatively far apart. Adjacent n+ regions of the intermediate zener diodes have a much lower breakdown voltage requirement so may be located close together. The zener diodes may be placed within a very small footprint or can be larger for better suppressor performance.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {3}
}

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