TY - GEN
T1 - A 1.2A buck-boost LED driver with 13% efficiency improvement using error-averaged SenseFET-based current sensing
AU - Rao, Sachin
AU - Khan, Qadeer
AU - Bang, Sarvesh
AU - Swank, Damian
AU - Rao, Arun
AU - McIntyre, William
AU - Hanumolu, Pavan Kumar
PY - 2011
Y1 - 2011
N2 - High-current LED drivers suffer from a significant efficiency loss due to the presence of a current regulation element (CRE) in series with the LED. In a conventional driver, either a series current source [1] or a sense resistor [2, 3] acts as a CRE to regulate the LED current (ILED). In this paper, we seek to improve the efficiency by eliminating the series CRE. To this end, we employ a highly accurate current sensing scheme to directly regulate I LED and achieve more than 13% efficiency improvement.
AB - High-current LED drivers suffer from a significant efficiency loss due to the presence of a current regulation element (CRE) in series with the LED. In a conventional driver, either a series current source [1] or a sense resistor [2, 3] acts as a CRE to regulate the LED current (ILED). In this paper, we seek to improve the efficiency by eliminating the series CRE. To this end, we employ a highly accurate current sensing scheme to directly regulate I LED and achieve more than 13% efficiency improvement.
UR - http://www.scopus.com/inward/record.url?scp=79955720553&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79955720553&partnerID=8YFLogxK
U2 - 10.1109/ISSCC.2011.5746300
DO - 10.1109/ISSCC.2011.5746300
M3 - Conference contribution
AN - SCOPUS:79955720553
SN - 9781612843001
T3 - Digest of Technical Papers - IEEE International Solid-State Circuits Conference
SP - 238
EP - 239
BT - 2011 IEEE International Solid-State Circuits Conference - Digest of Technical Papers, ISSCC 2011
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2011 IEEE International Solid-State Circuits Conference, ISSCC 2011
Y2 - 20 February 2011 through 24 February 2011
ER -