TY - GEN
T1 - Transient current regulation using a single DC-DC converter for high-efficiency RGB LEDs
AU - Day, Jacob
AU - Lie, Donald Y.C.
AU - Santos, Jose V.
PY - 2011
Y1 - 2011
N2 - This paper presents a dual-current regulating solution for a 3W light-emitting diode (LED) driver. This is useful for systems that use a single DC-DC converter driving multiple LEDs (e.g., interleaving red, green, and blue LEDs) to generate the full color range. When switching from blue to red, variations in LED forward voltage will cause a transient current spike of 1.5A for a desired steady state current of 300mA. Utilization of our work's dual current regulation reduces the transient current spike to as little as 10% overshoot of the desired steady state current, which has not been accomplished in previous works to the authors' knowledge. This regulation technique requires no extra control circuitry with minimal added design complexity, and only draws additional power when it is in use at LED transitions, allowing the system to operate at above 90% efficiency as suggested by SPICE simulations.
AB - This paper presents a dual-current regulating solution for a 3W light-emitting diode (LED) driver. This is useful for systems that use a single DC-DC converter driving multiple LEDs (e.g., interleaving red, green, and blue LEDs) to generate the full color range. When switching from blue to red, variations in LED forward voltage will cause a transient current spike of 1.5A for a desired steady state current of 300mA. Utilization of our work's dual current regulation reduces the transient current spike to as little as 10% overshoot of the desired steady state current, which has not been accomplished in previous works to the authors' knowledge. This regulation technique requires no extra control circuitry with minimal added design complexity, and only draws additional power when it is in use at LED transitions, allowing the system to operate at above 90% efficiency as suggested by SPICE simulations.
KW - DC-DC converter
KW - LED driver
KW - dual-current regulation
KW - transient current regulation
UR - http://www.scopus.com/inward/record.url?scp=80053650434&partnerID=8YFLogxK
U2 - 10.1109/MWSCAS.2011.6026345
DO - 10.1109/MWSCAS.2011.6026345
M3 - Conference contribution
AN - SCOPUS:80053650434
SN - 9781612848570
T3 - Midwest Symposium on Circuits and Systems
BT - 54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011
T2 - 54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011
Y2 - 7 August 2011 through 10 August 2011
ER -