Digital controlled dead-time for tri-mode buck-boost DC-DC converters

Cheng, Silu; Yao, Suying; Ge, Jin; Ng, Wai Tung

doi:10.1109/icsict.2014.7021475

Cited by 1 publication

(1 citation statement)

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“…Digital compensation circuits allow the implementation of complex control schemes and the dynamic control of the systems [5]. However, digital control suffers from signal processing delay and hence it requires a relatively high clock frequencies with respect to the switching frequencies [6]- [9]. Higher clock frequencies increase the electromagnetic emissions levels, which are highly undesirable for automotive applications.…”

Section: Introductionmentioning

confidence: 99%

Mixed-signal PI controller in current-mode DC-DC buck converter for automotive applications

Moursy

Khalil

Lecce

et al. 2016

2016 IEEE International Symposium on Circuits and Systems (ISCAS)

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This paper proposes a fully-integrated solution for the PI compensation circuits in current-mode DC-DC converters used in automotive applications. In such applications, the switching frequencies are low and hence conventional PI compensation circuits employ large capacitors. The proposed analog/mixedsignal PI comprises an analog proportional amplifier and a digital integrator. The analog proportional amplifier provides the required response time and maintains system stability. The digital integrator block is used to eliminate the output voltage steady-state error. Simulink is used to model the proposed DC-DC buck converter on the system level. The proposed system is verified by full system level simulation. The digital part is synthesized with HDL coder and laid-out using 0.35 µm CMOS technology. The estimated silicon area of the proposed solution is about 0.1 mm 2 . This result highlights the simplicity and the capacity for integration of the proposed control loop along with its potential for seamless implementation into pre-existing solutions with minor modifications.

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Section: Introductionmentioning

confidence: 99%