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Control current and relative stability of peak current-mode controlled pulse-width modulated dc–dc converters without slope compensation

Control current and relative stability of peak current-mode controlled pulse-width modulated dc–dc converters without slope compensation

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General equation for the control current for the inner-current loop of pulse-width modulated (PWM) dc–dc power converters with peak current-mode control without slope compensation is derived. Derivations of expressions for the control current as functions of duty cycle and phase margin at power stage specifications for buck, boost and buck–boost dc–dc converters in continuous conduction mode (CCM) are presented. Relative stability of the inner-current loop without slope compensation was analysed. Experimental and Saber simulation results for a buck converter with the inner-current loop are presented to validate the theory presented. The results obtained can be used to determine the range of control voltage required by the inner loop, to select a proper value of sense resistance, and to design the control circuit in the outer-voltage loop of peak current-mode controlled PWM DC–DC converters. It is shown that the phase margin of the inner loop is 0° at a duty cycle value of 0.5 and increases as the duty cycle decreases.

Inspec keywords: current-mode circuits; PWM power convertors; electric current control; stability; DC-DC power convertors

Other keywords: inner-current loop relative stability; current control; Saber simulation; phase margin; control circuit design; duty cycle function; DC-DC power converter stability; buck-boost DC-DC converters; outer-voltage loop; PWM converters; slope compensation; peak current-mode controlled pulse-width modulated converters; continuous conduction mode

Subjects: Control of electric power systems; Stability in control theory; Current control; Power electronics, supply and supervisory circuits

References

    1. 1)
      • B. Bryant , M.K. Kazimierczuk . Voltage-loop power-stage transfer functions with MOSFET delay for boost PWM converter operating in CCM. IEEE Trans. Ind. Electron. , 2 , 347 - 353
    2. 2)
      • S.C. Wong , X. Wu , C.K. Tse . Sustained slow-scale oscillation in higher order current-mode controlled converter. IEEE Trans. Circuits Syst. II , 5 , 489 - 493
    3. 3)
      • B. Choi , B.H. Cho , S.S. Hong . Dynamic and control of dc-to-dc converters driving other converters downstream. IEEE Trans. Circuits Syst. I , 10 , 1240 - 1248
    4. 4)
      • C.K. Tse . (2004) Complex behavior of switching power converters.
    5. 5)
      • Kondrath, N., Kazimierczuk, M.K.: `Margins of stability of inner-current loop of peak current-mode controlled PWM dc-dc converters', IEEE Int. Symp. on Circuits and Systems, 2009, p. 1985–1988.
    6. 6)
      • R.D. Middlebrook . Topics in multiple-loop regulators and current-mode programming. IEEE Trans. Power Electron. , 2 , 109 - 124
    7. 7)
      • Lau, B.Y., Middlebrook, R.D.: `Small-signal frequency response theory for piecewise-constant two-switched-network dc-to-dc converter systems', IEEE Power Electronics Specialists Conf. Record, 1986, p. 186–200.
    8. 8)
      • M.K. Kazimierczuk . (2008) Pulse-width modulated DC-DC power converters.
    9. 9)
      • N. Kondrath , M.K. Kazimierczuk . Bandwidth of current transformers. IEEE Trans. Instrum. Meas. , 6 , 2008 - 2016
    10. 10)
      • M.K. Kazimierczuk . Transfer function of current modulator in PWM converters with current-mode control. IEEE Trans. Circuits Syst. I , 9 , 1407 - 1412
    11. 11)
      • B. Bryant , M.K. Kazimierczuk . Modeling the closed-current loop of PWM dc-dc boost converter operating in CCM with peak current-mode control. IEEE Trans. Circuits Syst. I , 11 , 2404 - 2412
    12. 12)
      • B. Bryant , M.K. Kazimierczuk . Voltage-loop of boost dc-dc converters with peak current-mode control. IEEE Trans. Circuits Syst. I , 1 , 99 - 105
    13. 13)
      • Kondrath, N., Kazimierczuk, M.K.: `Control-to-output and duty ratio-to-inductor current transfer functions of peak current-mode controlled DC-DC PWM buck converter in CCM', Proc. IEEE Int. Symp. on Circuits and Systems, 2010, p. 2734–2737.
    14. 14)
      • B. Bryant , M.K. Kazimierczuk . Open-loop power-stage transfer functions relevant to current-mode control of boost PWM converter operating in CCM. IEEE Trans. Circuits and Syst. I , 10 , 2158 - 2164
    15. 15)
      • B. Choi . Step load response of a current-mode-controlled dc-to-dc converter. IEEE Trans. Aerosp. Electron. Syst. , 4 , 1115 - 1121
    16. 16)
      • Hsu, S.P., Brown, A., Rensink, L., Middlebrook, R.D.: `Modelling and analysis of switching DC-to-DC converters in constant-frequency current-programmed mode', IEEE Power Electronics Specialists Conf. Record, 1979, p. 284–301.
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