Loop‐handover technique for digitally controlled multiple‐output dc–dc converters

Abstract

The loop‐handover (LHO) technique is proposed to overcome the problem of close‐loop performance in digitally controlled single‐inductor multiple‐output dc–dc boost converters during start‐up. The presented technique utilises an existing clock source and requires only a small number of blocks. It also occupies a smaller silicon area, thus consuming low power and increasing efficiency. The presented technique is validated with proposed on‐chip digital controller with multiple‐output boost converter architecture using segmented delay line digital pulse width modulation. Experimental results show a successful close loop with reduced transients by using the simpler LHO technique.

Digitally Controlled Single-inductor Multiple-output Synchronous DC-DC Boost Converter with Smooth Loop Handover Using 55 nm Process

“…The initial transients and close-loop problem in the SIMO digital converters are solved by utilizng the presented SLH technique in [15]. An SLH is employed by an inverted DPWM output, a timing command signal, and a multiplexer (SLH_MUX) as shown in Fig.…”

“…By contrast, the design presented in [15] is applicable to SIMO with digital control to solve the problems of close-loop performance in digitally controlled SIMO converters. Only a specific block of loop handover is explained in [15], whereas all surrounding blocks and their designs are discussed in the present study in detail.…”

“…By contrast, the design presented in [15] is applicable to SIMO with digital control to solve the problems of close-loop performance in digitally controlled SIMO converters. Only a specific block of loop handover is explained in [15], whereas all surrounding blocks and their designs are discussed in the present study in detail. Digital control in most DC-DC converters are employed by external microcontrollers, field programmable gate arrays (FPGAs), and compact reconfigurable input-output (cRIO) modules [16]- [18].…”

Single Inductor-Multiple Output DPWM DC-DC Boost Converter with a High Efficiency and Small Area

“…In [20,21], the scheme of SLH is used only in analog domain, but in [22], the scheme can apply in SIMO architectures with a digital control. This scheme is the best solution for the issues of the close loop that occur in DPWM SIMO DC-DC converters.…”