TY - GEN
T1 - A 91% efficient 30V hybrid boost-SC converter based backlight LED driver in 180nm CMOS
AU - Pal, Nilanjan
AU - Fish, Adam
AU - McIntyre, William
AU - Griesert, Nathanael
AU - Winter, Greg
AU - Eichhorn, Travis
AU - Pilawa-Podgurski, Robert
AU - Hanumolu, Pavan Kumar
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/3
Y1 - 2020/3
N2 - This paper presents a new hybrid boost converter architecture for improving the efficiency of LED drivers used in mobile applications. By cascading a low-switching frequency time-interleaved series-parallel SC-stage with an inductive boost converter, we facilitate the use of lower voltage rated switches, thus greatly reducing the switching losses. Charge-sharing losses of the SC stage are minimized by soft-charging flying capacitors with the inductor of the boost stage. Fabricated in 180nm BCD process, the prototype converter generates 30V output voltage from a Li-ion battery source and can provide a load current in the range of 0 to 100mA with an excellent peak power efficiency of 91.15% at 30mA. Compared to state-of-the-art designs, the proposed converter achieves a 3 % improvement in peak power efficiency.
AB - This paper presents a new hybrid boost converter architecture for improving the efficiency of LED drivers used in mobile applications. By cascading a low-switching frequency time-interleaved series-parallel SC-stage with an inductive boost converter, we facilitate the use of lower voltage rated switches, thus greatly reducing the switching losses. Charge-sharing losses of the SC stage are minimized by soft-charging flying capacitors with the inductor of the boost stage. Fabricated in 180nm BCD process, the prototype converter generates 30V output voltage from a Li-ion battery source and can provide a load current in the range of 0 to 100mA with an excellent peak power efficiency of 91.15% at 30mA. Compared to state-of-the-art designs, the proposed converter achieves a 3 % improvement in peak power efficiency.
KW - DC-DC converter
KW - LED drivers
KW - hybrid converter
UR - http://www.scopus.com/inward/record.url?scp=85084509513&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85084509513&partnerID=8YFLogxK
U2 - 10.1109/CICC48029.2020.9075886
DO - 10.1109/CICC48029.2020.9075886
M3 - Conference contribution
AN - SCOPUS:85084509513
T3 - Proceedings of the Custom Integrated Circuits Conference
BT - 2020 IEEE Custom Integrated Circuits Conference, CICC 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2020 IEEE Custom Integrated Circuits Conference, CICC 2020
Y2 - 22 March 2020 through 25 March 2020
ER -