A 200-V 98.16%-Efficiency Buck LED Driver Using Integrated Current Control to Improve Current Accuracy for Large-Scale Single-String LED Backlighting Applications

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This paper presents an average current mode buck dimmable light-emitting diode (LED) driver for large-scale single-string LED backlighting applications. The proposed integrated current control technique can provide exact current control signals by using an autozeroed integrator to enhance the accuracy of the average current of LEDs while driving a large number of LEDs. Adoption of discontinuous low-side current sensing leads to power loss reduction. Adoption of a fast-settling technique allows the LED driver to enter into the steady state within three switching cycles after the dimming signal is triggered. Implemented in a 0.35-mu m HV CMOS process, the proposed LED driver achieves 1.7% LED current error and 98.16% peak efficiency over an input voltage range of 110 to 200 V while driving 30 to 50 LEDs
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2016-09
Language
English
Article Type
Article
Keywords

STATE LIGHTING APPLICATIONS; DRIVING SYSTEM; LCD PANELS; ILLUMINATION; ENERGY

Citation

IEEE TRANSACTIONS ON POWER ELECTRONICS, v.31, no.9, pp.6416 - 6427

ISSN
0885-8993
DOI
10.1109/TPEL.2015.2499540
URI
http://hdl.handle.net/10203/208725
Appears in Collection
EE-Journal Papers(저널논문)
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