Bryansk, Bryansk, Russian Federation
Work objective is the determination of data on the frequency-domain behavior of components in the composition of the microcircuit and within the microcircuit as a whole, intended for using in DC voltage pulse converters. Research methods: simulation modeling. Research results and novelty: for microcircuits with an external frequency weighing network a frequency analysis scheme using an auxiliary operational amplifier and an active low-pass filter of the second order is proposed. Using a simulator in the LT-spice environment, the amplitude and phase frequency response data of the microchips of the step-down and step-up converters have been obtained. The possibility of technical implementation of the proposed scheme for experimental determination of frequency-domain behavior including final control of the parameters of the appropriate microchips has been noted. For microchips having built-in frequency weighing circuit, the possibility of determining frequency-domain characteristics during the formation of a test signal in an external control circuit has been confirmed. It is found that the use of this method for microchips with increased dynamic properties is problematic. Conclusion: the frequency analysis scheme using an auxiliary operational amplifier is suitable for both step-down and step-up DC/DC converters with an external frequency weighing network. This scheme can be recommended for experimental determination of frequency-domain behavior, including final control of the parameters of the appropriate microchips.
frequency-domain behavior (characteristics), gain margin, LT-spice, regulator, control circuit
1. Power Management. Texas Instruments, available at: URL: http://www.ti.com/power-management/overview.html (accessed 17, May,2019)
2. Abramov, S. V. Dynamics of a step-down pulse converter with a single-circuit control system on a serial chip: Candidate's thesis for the degree of Candidate of Technical Sciences, available at: URL: http://www.chuvsu.ru/images/stories/dissovety/212.301.02/ASV/Abramov_SV-disser.pdf, (accessed 5,May, 2019)
3. Maksimovic, D. Small-Signal Discrete-Time Modeling of Digitally Controlled PWM Converters / D. Maksimovic, R. Zane // IEEE Transactions on Power Electronics. – 2007. – vol. 22. – iss. 6. – pp. 2552 – 2556
4. Lin-Shi, X. Stability analysis for integrated DC/DC converters / X. Lin-Shi [et al.] // IEEE 12th International Conference on Solid-State and Integrated Circuit Technology (ICSICT). – 2014. – pp. 1-3.
5. Ali, H. Frequency response measurements of dc-dc buck converter / H. Ali [et al.] // IEEE International conference on information and automation. – 2015. – pp. 2233-2237.
6. AN-1889 How to Measure the Loop Transfer Function of Power Supplies. Technical Support Texas Instruments, available at: URL: https://www.ti.com/lit/an/snva364a/snva364a.pdf (accessed 5, September, 2021).
7. R. Ridley. Frequency Response Measurements for Switching Power Supplies, available at: URL: https://www.researchgate.net/publication/267855326_Frequency_Response_Measurements_for_Switcing_Power_Supplies, (accessed 9, September, 2021).
8. Abramov, S.V. Frequency-domain characteristics of a step-down pulse converter in continuous and intermittent current modes, S.V. Abramov. Bulletin of the Chuvash University, 2016, no. 1, pp. 5-14.
9. Control Loop Design and Easy Verification Method. ON Semiconductor, available at: URL: https://www.onsemi.com/pub/Collateral/TND6238-D.PDF, (accessed 5, September, 2019).
10. Dostal. Measure Power-supply Loop Transfer, available at: URL: https://www.edn.com/design/test-and-measurement/4385974/Measure-power-supply-loop-transfer-4385974, (accessed 5, May, 2019).
11. Henry J. Zhang. Modeling and Loop Compensation Design of Switching Mode Power Supplies. Analog Devices, available at: URL: https://www.analog.com/media/en/technical-documentation/application-notes /AN149fa.pdf, (accessed 5, May, 2019).
12. Zotin, V.F. Determination of frequency-domain characteristics of microchips of pulse voltage converters, V.F. Zotin . CAD and modeling in modern electronics [sci.proc. of the III International Scientific and Practical Conference], edited by A.Yu. Drakin. - Bryansk, 2019, pp. 267-270, ISBN 978-5-907271-06-7.
