TY - JOUR
T1 - Dimmable integrated CMOS LED driver based on a resonant DC/DC hybrid-switched capacitor converter
AU - Castellanos, Juan C.
AU - Turhan, M.
AU - Hendrix, Marcel A.M.
AU - van Roermund, Arthur
AU - Cantatore, Eugenio
PY - 2018/8/1
Y1 - 2018/8/1
N2 - This paper presents a 7.7-mm2 on-chip LED driver based on a DC/DC resonant hybrid-switched capacitor converter operating in the MHz range with and without output capacitor. The converter operation allows continuously dimming the LED while keeping control on both peak and average current. Also, it features no flickering even in the absence of output capacitor and for light dimmed down to 10% of the nominal value. The capacitors and switches of the LED driver are integrated on a single IC die fabricated in a low-cost 5 V 0.18-μm bulk CMOS technology. This LED driver uses a small (0.7 mm2) inductor of 100 nH, which is 10 times smaller value than prior art integrated inductive LED drivers, still showing a competitive peak efficiency of 93% and achieving a power density of 0.26 W/mm2 (0.34 W/mm3).
AB - This paper presents a 7.7-mm2 on-chip LED driver based on a DC/DC resonant hybrid-switched capacitor converter operating in the MHz range with and without output capacitor. The converter operation allows continuously dimming the LED while keeping control on both peak and average current. Also, it features no flickering even in the absence of output capacitor and for light dimmed down to 10% of the nominal value. The capacitors and switches of the LED driver are integrated on a single IC die fabricated in a low-cost 5 V 0.18-μm bulk CMOS technology. This LED driver uses a small (0.7 mm2) inductor of 100 nH, which is 10 times smaller value than prior art integrated inductive LED drivers, still showing a competitive peak efficiency of 93% and achieving a power density of 0.26 W/mm2 (0.34 W/mm3).
KW - CMOS integrated circuit
KW - DC-DC power converters
KW - dimmable LED driver
KW - light-emitting diodes
KW - switching converters
KW - zero-current switching (ZCS)
UR - http://www.scopus.com/inward/record.url?scp=85051421120&partnerID=8YFLogxK
U2 - 10.1002/cta.2512
DO - 10.1002/cta.2512
M3 - Article
AN - SCOPUS:85051421120
SN - 0098-9886
VL - 46
SP - 1485
EP - 1502
JO - International Journal of Circuit Theory and Applications
JF - International Journal of Circuit Theory and Applications
IS - 8
ER -