This work presents a novel boost converter with time-based control for LED display applications. Using the inductor current, the right-half-plane zero of the CCM control-to-output transfer function is eliminated to improve dynamic performances with no extra off-chip component or power switch. To increase efficiency at light loads, a PFM operating mode with seamless PFM-to-CCM transition is included. The prototype implemented in a 0.18m BCD process provides a regulated output voltage of 5V with a 2.5-to-4.5V input voltage range. With a 3.5V input, the efficiency reaches a peak of 96%, while it is above 90% down to 10mA loads. The area occupation of the time-based PID controller is about 0.16 square millimeters with a quiescent current of 300A. The converter bandwidth is increased by a factor of about 5 with respect to a standard compensation scheme.

An 800-mA Time-Based Boost Converter in 0.18um BCD with Right-Half-Plane Zero Elimination and 96% Power Efficiency

Leoncini M.;Levantino S.;Ghioni M.
2021-01-01

Abstract

This work presents a novel boost converter with time-based control for LED display applications. Using the inductor current, the right-half-plane zero of the CCM control-to-output transfer function is eliminated to improve dynamic performances with no extra off-chip component or power switch. To increase efficiency at light loads, a PFM operating mode with seamless PFM-to-CCM transition is included. The prototype implemented in a 0.18m BCD process provides a regulated output voltage of 5V with a 2.5-to-4.5V input voltage range. With a 3.5V input, the efficiency reaches a peak of 96%, while it is above 90% down to 10mA loads. The area occupation of the time-based PID controller is about 0.16 square millimeters with a quiescent current of 300A. The converter bandwidth is increased by a factor of about 5 with respect to a standard compensation scheme.
ESSCIRC 2021 - IEEE 47th European Solid State Circuits Conference, Proceedings
978-1-6654-3751-6
integrated circuits
power management
BCD
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1190471
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