Dimming LED circuit augmenting DC/DC controller integrated circuit
Abstract
Embodiments include systems, methods, and apparatuses for providing a dimming function in a single stage AC input light emitting diode (LED) driver with a controller that contains an on-chip error amplifier and an on-chip fixed reference voltage source coupled to a first input of the error amplifier. The controller controls a duty cycle of a switching transistor to cause a feedback voltage, applied to a first package input terminal, to match the reference voltage. To achieve a dimming function, a voltage across a current sense resistor in series with the LEDs is applied to a first input of a high gain differential amplifier, and a variable dimming control voltage is applied to a second input of the differential amplifier. The output of the differential amplifier is coupled to the first package input terminal. The differential amplifier input signals will be matched at the target LED current level.
- Inventors:
- Issue Date:
- Research Org.:
- Lumileds LLC, San Jose, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1805665
- Patent Number(s):
- 10959306
- Application Number:
- 15/606,388
- Assignee:
- Lumileds LLC (San Jose, CA)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H03 - BASIC ELECTRONIC CIRCUITRY H03G - CONTROL OF AMPLIFICATION
H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05B - ELECTRIC HEATING
- DOE Contract Number:
- EE0006703
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 05/26/2017
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Song, Zhengrong, Soer, Wouter Anthon, Bonne, Ron, and Qiu, Yifeng. Dimming LED circuit augmenting DC/DC controller integrated circuit. United States: N. p., 2021.
Web.
Song, Zhengrong, Soer, Wouter Anthon, Bonne, Ron, & Qiu, Yifeng. Dimming LED circuit augmenting DC/DC controller integrated circuit. United States.
Song, Zhengrong, Soer, Wouter Anthon, Bonne, Ron, and Qiu, Yifeng. Tue .
"Dimming LED circuit augmenting DC/DC controller integrated circuit". United States. https://www.osti.gov/servlets/purl/1805665.
@article{osti_1805665,
title = {Dimming LED circuit augmenting DC/DC controller integrated circuit},
author = {Song, Zhengrong and Soer, Wouter Anthon and Bonne, Ron and Qiu, Yifeng},
abstractNote = {Embodiments include systems, methods, and apparatuses for providing a dimming function in a single stage AC input light emitting diode (LED) driver with a controller that contains an on-chip error amplifier and an on-chip fixed reference voltage source coupled to a first input of the error amplifier. The controller controls a duty cycle of a switching transistor to cause a feedback voltage, applied to a first package input terminal, to match the reference voltage. To achieve a dimming function, a voltage across a current sense resistor in series with the LEDs is applied to a first input of a high gain differential amplifier, and a variable dimming control voltage is applied to a second input of the differential amplifier. The output of the differential amplifier is coupled to the first package input terminal. The differential amplifier input signals will be matched at the target LED current level.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 23 00:00:00 EDT 2021},
month = {Tue Mar 23 00:00:00 EDT 2021}
}
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