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AUDIO SUSCEPTIBILITY OF THE BUCK CONVERTER IN …
http://users.utcluj.ro/~atn/papers/ATN_2_2008_1.pdf
obtain an audio susceptibility as low as possible. II. BUCK CONVERTER OPERATING IN CURRENT-MODE CONTROL Fig. 1 shows the PWM Converter with Current-Mode Control. In this case the instantaneous value of the inductor current is summed with an external ramp and used to control the duty cycle. The peak current
Audio-susceptibility of the inner-loop of peak current ...
https://ieeexplore.ieee.org/document/6388638/
Audio-susceptibility transfer functions without and with feed-forward gains along with required power-stage transfer functions are derived for peak current-mode controlled PWM dc-dc buck converter. The derived audio-susceptibility transfer functions are illustrated for given values of perturbation ratio using MATLAB.
Null audio susceptibility of current-mode buck converters ...
https://experts.illinois.edu/en/publications/null-audio-susceptibility-of-current-mode-buck-converters-small-s
Small signal modeling of sensorless current-mode (SCM) control for dc-dc converters reveals a method of achieving zero (null) audio susceptibility. Similar results are known for peak current-mode (PCM) control. The true line-to-output responses of such SCM and PCM "null"-designs are demonstrated to be non-zero for non-small signal disturbances.
Audio-susceptibility of inner loop of true-average current ...
https://ieeexplore.ieee.org/document/8052959/
The audio-susceptibility of the average current-mode controlled buck dc-dc converter in continuous-conduction mode is presented in this paper. The average current-mode control scheme used in this paper regulates the true average component of the sensed inductor current and is not affected by a high inductor current ripple at low duty ratios. The principle of …
Model following average-current-mode control with 1/∛s ...
https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/iet-pel.2017.0070
In addition, the MFACM control is shown to elevate perturbation rejection ability of converters by reducing closed-loop output impedance and closed-loop audio susceptibility, relative to traditional average-current-mode control methods with the almost same crossover frequency. Computer simulations
Analysis and Comparison of Popular Models for Current …
https://corescholar.libraries.wright.edu/cgi/viewcontent.cgi?article=2169&context=etd_all
closed and outer loop open, audio susceptibility, and output impedance. The two most important models in consideration are: 1) Continuous-Time Model and 2) Peak Current-Mode control Model. Despite the fact that both these models predict the instability of current-mode control at a duty ratio of 0.5, these models differ signifi-
NCP1216: PWM Controller, Fixed Frequency, Current Mode
https://www.onsemi.com/products/power-management/ac-dc-power-conversion/offline-controllers/ncp1216
Current-mode control also provides an excellent input audio-susceptibility and inherent pulse-by-pulse control. Internal ramp compensation easily prevents sub-harmonic oscillations from taking place in continuous conduction mode designs. When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC ...
Unified Three-terminal Switch Model for Current …
https://vtechworks.lib.vt.edu/bitstream/handle/10919/35647/Yan_Y_T_2010.pdf
Current-mode control architectures with different implementation approaches have been an indispensable technique in many applications, such as voltage regulator, power ... properties of audio susceptibility and output impedance are discussed. It is found that, for adaptive voltage positioning design, constant on-time current mode control can ...
Voltage-mode control and compensation: Intricacies for ...
https://www.edn.com/voltage-mode-control-and-compensation-intricacies-for-buck-regulators/
Voltage-mode control and compensation: Intricacies for buck regulators. June 30, 2008. by Timothy Hegarty. Comments 0. It would be a masterpiece of understatement to suggest that control loop compensation holds much significance in power converter design. This is true in part because of increasing demand for ultra-fast load transient dynamic ...
PWM Controller, Fixed Frequency, Flyback, Current Mode ...
https://www.onsemi.com/products/power-management/ac-dc-power-conversion/offline-controllers/ncp1200
Thanks to current-mode control, the NCP1200 drastically simplifies the design of reliable and cheap offline converters with excellent audio- susceptibility and inherent pulse-by-pulse control. When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so-called skip cycle mode ...
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