Title :
An Asynchronous 1.8MHz DC/DC Boost Converter Implemented in the Current Domain for Cellular Phone Lighting Management
Author :
Höllinger, Werner ; Punzenberger, Manfred
Author_Institution :
Infineon Technol. Austria AG, Villach
Abstract :
This paper presents an asynchronous 1.8MHz DC/DC boost converter used to generate any output voltage between 5.6V and 25V out of a single cell Li-ion battery. The output is controlled by a pulse-width-modulated (PWM) current programmed mode (CPM) controller. An area-efficient controller with excellent dynamic performance is achieved by using an adaptive P compensator; the proposed control circuit is entirely implemented in the current domain. The typical conversion efficiency of 80% at 120mA is mainly determined by conduction and switching losses in the external components. A 0.25mum standard CMOS technology with thick metal stack and a 5V device allows a direct-to-battery connection; the area is 0.34mm2
Keywords :
CMOS integrated circuits; DC-DC power convertors; PWM power convertors; adaptive control; cellular radio; compensation; light emitting diodes; lighting control; lithium; mobile handsets; proportional control; secondary cells; 0.25 micron; 1.8 MHz; 120 mA; 5 V; 5 to 25 V; CMOS technology; CPM controller; Li; PWM; adaptive P compensator; asynchronous DC/DC boost converter; cellular phone lighting management; conduction losses; current domain; current programmed mode controller; direct-to-battery connection; pulse-width-modulation; single cell Li-ion battery; switching losses; Adaptive control; Batteries; CMOS technology; Cellular phones; Circuits; DC generators; Programmable control; Pulse width modulation; Space vector pulse width modulation; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 2006. ESSCIRC 2006. Proceedings of the 32nd European
Conference_Location :
Montreux
Print_ISBN :
1-4244-0303-0
DOI :
10.1109/ESSCIR.2006.307506
