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A fully integrated wide-band PID controller is implemented for a buck DC-DC converter operating in voltage mode. To implement efficiently areal on-chip PID controller, a novel compensator is proposed utilizing AC ripple current of the inductor. The integral controller with an error amplifier and the proportional controller do not require any additional capacitors. The bandwidth of overall loop is...
The fixed on-time with bottom detection control having ripple injection has become very attractive due to practical usage and realization of ceramic capacitor solution for output while keeping ultra fast transient response. This paper presents quantitative analysis by introducing averaging method in comparator operation for the transfer function. As a result, the frequency response characteristic...
In a DSTATCOM, generally, the DC capacitor voltage is regulated using a PI controller when various control algorithms are used for load compensation. However, during load changes, there is considerable variation in DC capacitor voltage which might affect compensation. In this work, a fuzzy logic based supervisory method is proposed to improve transient performance of the DC link. The fuzzy logic based...
Motivated by emerging self-sustained low-power applications, this paper presents a new integrated power supply solution with reconfigurable step-up/down switched-capacitor power stage and adaptive gain/pulse control, featuring variable gain ratios, low ripples and fast transient responses. The converter was designed with TSMC 0.35-mum digital CMOS N-well process. With an input voltage ranging from...
The paper discusses a DSTATCOM topology for compensating ac loads in the three-phase, four-wire systems as well as supplying dc loads from its dc link. Its state space modeling is presented. The transient response of the compensator is very important while compensating dynamically varying loads. Any change in the load affects the dc link voltage directly. Generally, a closed loop proportional integral...
High-stability, high-accuracy low-dropout (LDO) voltage regulators are presented. The proposed LDOs make use of the slow-rolloff frequency compensation scheme which can enhance the stability, increase the loop gain and unit-gain frequency (UGF). This scheme is realized by introducing a dominant half-pole by virtue of three zero-pole pairs and a low-frequency pole. Post-layout simulation results show...
This paper presents a PID controller for dc-link boost voltage in Z-source inverter. With this technique a constant capacitor voltage can be achieved with an excellent transient performance which enhances the rejection of disturbance, including the input voltage ripple and load current variation, and have good ride-through for voltage-sags. The shoot-through duty cycle modulation strategy for control...
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