Dimmable integrated CMOS LED driver based on a resonant DC/DC hybrid-switched capacitor converter

被引：5

作者：

Castellanos, Juan C. ^{[1
]}

Turhan, M. ^{[1
]}

Hendrix, Marcel A. M. ^{[1
,2
]}

van Roermund, Arthur ^{[1
]}

Cantatore, Eugenio ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Eindhoven, Netherlands

[2] Philips Lighting Res, Eindhoven, Netherlands

来源：

INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS | 2018年 / 46卷 / 08期

关键词：

CMOS integrated circuit; DC-DC power converters; dimmable LED driver; light-emitting diodes; switching converters; zero-current switching (ZCS); POWER INDUCTOR; OPTIMIZATION; SUBSTRATE;

D O I：

10.1002/cta.2512

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents a 7.7-mm(2) 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 5V 0.18-m bulk CMOS technology. This LED driver uses a small (0.7mm(2)) inductor of 100nH, 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 0.26W/mm(2) (0.34W/mm(3)).

引用

页码：1485 / 1502

页数：18

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[2]

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