This paper presents a buck-boost dc-dc converter for LED drivers capable of delivering an output current ranging from 0.1to 2 A and a variable output voltage ranging between 2 and 5 V, starting from an input voltage spanning from 2.7 to 5.5 V. The dc-dc converter, realized in a 0.18-μm CMOS technology with 5-V option, occupies an area of 4 mm2 including pads. The circuit features automatic mode switching and dynamic sizing of the power transistors to achieve a peak efficiency of 91%. With a switching frequency of 2.5 MHz, the achieved line regulation is lower than 0.1% V -1 and the output voltage ripple is less than 10 mV. The obtained turn-on and load transient settling time are lower than 40 μs, thus allowing pulsed operation of the LEDs, as well as switching among LEDs of different colors. © 1986-2012 IEEE.

Malcovati, P., Belloni, M., Gozzini, F., Bazzani, C., & Baschirotto, A. (2014). A 0.18-μm CMOS, 91%-efficiency, 2-A scalable buck-boost DC-DC converter for LED drivers. IEEE TRANSACTIONS ON POWER ELECTRONICS, 29(10), 5392-5398 [10.1109/TPEL.2013.2294189].

A 0.18-μm CMOS, 91%-efficiency, 2-A scalable buck-boost DC-DC converter for LED drivers

Malcovati, P;Baschirotto, A
2014

Abstract

This paper presents a buck-boost dc-dc converter for LED drivers capable of delivering an output current ranging from 0.1to 2 A and a variable output voltage ranging between 2 and 5 V, starting from an input voltage spanning from 2.7 to 5.5 V. The dc-dc converter, realized in a 0.18-μm CMOS technology with 5-V option, occupies an area of 4 mm2 including pads. The circuit features automatic mode switching and dynamic sizing of the power transistors to achieve a peak efficiency of 91%. With a switching frequency of 2.5 MHz, the achieved line regulation is lower than 0.1% V -1 and the output voltage ripple is less than 10 mV. The obtained turn-on and load transient settling time are lower than 40 μs, thus allowing pulsed operation of the LEDs, as well as switching among LEDs of different colors. © 1986-2012 IEEE.
Articolo in rivista - Articolo scientifico
Analog integrated circuits; CMOS integrated circuits; dc-dc power converters
English
5392
5398
7
Malcovati, P., Belloni, M., Gozzini, F., Bazzani, C., & Baschirotto, A. (2014). A 0.18-μm CMOS, 91%-efficiency, 2-A scalable buck-boost DC-DC converter for LED drivers. IEEE TRANSACTIONS ON POWER ELECTRONICS, 29(10), 5392-5398 [10.1109/TPEL.2013.2294189].
Malcovati, P; Belloni, M; Gozzini, F; Bazzani, C; Baschirotto, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/76619
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