Modeling of the Control Behavior of Current-Mode Constant On-Time Boost Converters

Hsu, Yu-Chien; Cogălniceanu, Dan; Hsiao, Sheng-Fu; Cheng, Hung-Yu; Huang, Chun-Shih

doi:10.1109/tia.2016.2597280

Cited by 9 publications

(1 citation statement)

References 9 publications

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“…R n4 is the output resistance of node 4, and B is the current factor in the amplifier [24]. From [25] it is known that the DCDC boost converter has a right half-plane zero as shown in (5) (D is the on-off duty cycle of MN in Figure 1) it can cause system instability and requires the inclusion of a compensation circuit. The proposed boost converter system will incorporate a compensation structure in the error amplifier as shown in Figure 6.…”

Section: Ea With H-clamp and L-clampmentioning

confidence: 99%

Hybrid Modulated DCDC Boost Converter for Wearable Devices

Gan²

2022

Electronics

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Wearable devices require power management systems to achieve high conversion efficiency over a wide range of load currents. Multi-mode mixed modulation can be used in DCDC converters to achieve high efficiency over a wide load current range. The DCDC boost converter proposed in this paper uses a hybrid modulation of DGM (Deep Green Control Mode), PCMC (Peak current mode control)-PFM (Pulse Frequency Modulation) and PCMC-PWM (Pulse Width Modulation). The converter switches smoothly from PCMC-PFM to PCMC-PWM mode under load-current-based conditions and without any mode selection module. The proposed DCDC boost converter is fabricated in a 0.18 μm CMOS process with a Die area of 1.24 × 0.78 μm2. The input voltage range is 0.8–5 V, the output voltage is 5 V, and the load current range is 5–300 mA. Experimental results show that the boost converter can achieve 94.7% peak efficiency. Efficiency of more than 90% can be achieved in the load current range of 30–300 mA.

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Section: Ea With H-clamp and L-clampmentioning

confidence: 99%

Hybrid Modulated DCDC Boost Converter for Wearable Devices

Gan²

2022

Electronics

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A bidirectional non-isolated hybrid modular DC–DC converter with zero-voltage switching

Elserougi

Abdelsalam

Massoud

et al. 2019

Electric Power Systems Research

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A Voltage Ripple Compensation Method for Constant On-Time Buck Converter

He,

Liu,

Xia

et al. 2023

IEEE Access

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Subharmonic oscillation stands as a critical concern in the context of ripple-based constant-ontime (COT) controllers. While this issue can be mitigated through the application of the virtual inductor current (VIC) technique, it comes at the cost of load transient response. To achieve both high stability and rapid transient response, this paper introduces an Output Capacitor Voltage Ripple Compensation (VRC) technique. This technique minimizes the phase delay attributed to output capacitance by introducing a virtual output ripple (VVOR) inversely related to the feedback voltage. The VVOR serves to expedite the load transient response by counteracting the additional virtual inductor current injection during load transients. Utilizing a 0.13µm BCD technology, a synchronous buck converter is integrated with the proposed VRC-COT controller, showcasing exceptional stability across a load current range of 0 to 8A, even when equipped with a 30% 88µF ceramic output capacitor. Additionally, the load transient response exhibits reduced overshoot and undershoot, measuring at 120mV and 130mV, respectively, in response to load steps from 0A to 8A within a 10µS timeframe.INDEX TERMS Constant On-Time (COT), ripple-based control, voltage ripple compensation (VRC), equivalent series resistor (ESR), subharmonic oscillation.

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Modeling of the Control Behavior of Current-Mode Constant On-Time Boost Converters

Cited by 9 publications

References 9 publications

Hybrid Modulated DCDC Boost Converter for Wearable Devices

Hybrid Modulated DCDC Boost Converter for Wearable Devices

A bidirectional non-isolated hybrid modular DC–DC converter with zero-voltage switching

A Voltage Ripple Compensation Method for Constant On-Time Buck Converter

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