A Li-Ion Battery Input Highly Integrated LED Driver With 96.8% Peak Efficiency and Dual-Color Mixing Capability

Caiyu Tong; Zihao Fan; Yuan Gao

2023

10.1109/JSSC.2023.3331763

IEEE Journal of Solid-State Circuits   影响因子和分区

1558-173X

1558-173X

This article presents an efficient and highly integrated light-emitting diode (LED) driver powered by a Li-ion battery with dual-color mixing capability. In terms of efficiency, the power stage of the proposed driver utilizes only two on-chip NMOS power transistors and can operate at a lower switching frequency, effectively reducing conduction loss and switching loss. Additionally, the inductor-first topology and the floating output voltage enable the elimination of the offchip capacitors, making a single inductor the only off-chip component. The proposed LED driver chip, fabricated in a 0.18-μm BCD process, can provide a total LED current ranging from 270 to 550 mA within the voltage range of a Li-ion battery (2.7-4.2 V) with 96.8% peak efficiency. Measurement results demonstrate that the proposed driver can adjust the ratio of a white LED and a phosphor-converted (PC) amber LED to achieve tunable correlated color temperature (CCT) over a wide range. In addition to average current regulation, the driver also supports pulsewidth modulation (PWM) dimming with a duty ratio ranging from 0.5% to 99.5%.

Color Mixing Dc–dc Converter Light-emitting Diode (LED) Driver Off-chip Capacitor Free Pulsewidth Modulation (PWM) Dimming Tunable Correlated Color Temperature (CCT)

SCI ; EI

英语

第一 ; 通讯

WOS:001121152600001

20240715545242

Color ; Efficiency ; Electric inductors ; Ions ; Light emitting diodes ; Lithium-ion batteries ; Mixing ; Pulse width modulation

Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Chemical Operations:802.3 ; Production Engineering:913.1 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4

ENGINEERING

2-s2.0-85184803213

IEEE

School of Microelectronics, Southern University of Science and Technology, Shenzhen, China

Caiyu Tong,Zihao Fan,Yuan Gao. A Li-Ion Battery Input Highly Integrated LED Driver With 96.8% Peak Efficiency and Dual-Color Mixing Capability[J]. IEEE Journal of Solid-State Circuits,2023,PP(99):1-10.

Caiyu Tong,Zihao Fan,&Yuan Gao.(2023).A Li-Ion Battery Input Highly Integrated LED Driver With 96.8% Peak Efficiency and Dual-Color Mixing Capability.IEEE Journal of Solid-State Circuits,PP(99),1-10.

Caiyu Tong,et al."A Li-Ion Battery Input Highly Integrated LED Driver With 96.8% Peak Efficiency and Dual-Color Mixing Capability".IEEE Journal of Solid-State Circuits PP.99(2023):1-10.