Double-edge pulse frequency modulation (PFM) modulation voltage-type control method of output capacitance low equivalent series resistance (ESR) switch convertor and device thereof
A technology for switching converters and output capacitors, which is applied in the field of control methods and devices for switching converters, can solve problems such as the failure of switching converters to work normally, and achieve short adjustment time, good transient performance, and high voltage stabilization accuracy Effect
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Embodiment 1
[0027] figure 1 As shown, a specific embodiment of the present invention is: output capacitance low ESR switching converter dual edge PFM modulation voltage type control method and its device DEF, its DEF device is mainly composed of current detection circuit IS, voltage detection circuit VS, adder ADD, voltage controller VCM, time operator TM, control timing generator CP, and drive circuit DR. The voltage detection circuit VS is used to obtain the output voltage information, the current detection circuit IS is used to obtain the current information flowing through the output capacitor without affecting the output voltage ripple, and the voltage controller VCM is used to generate the voltage control signal V c , the time operator TM is used to generate variable time, and the control sequence generator CP generates a control sequence consisting of constant on, off, and constant on or composed of on, constant The control sequence consisting of turn-off and turn-on controls the ...
Embodiment 2
[0039] The present invention adopts the signal flowchart of embodiment two method also as figure 1 As shown, the specific implementation method is: the voltage detection circuit VS is used to obtain the output voltage information, the current detection circuit IS is used to obtain the current information flowing through the output capacitor without affecting the output voltage ripple, and the voltage controller VCM is used for to generate the voltage control signal V c , the time operator TM is used to generate variable time, and the control sequence generator CP generates a control sequence consisting of constant off, on, and constant off or composed of off, constant The control sequence composed of turn-on and turn-off controls the turn-off and turn-on of the switching tube of the switching converter TD via the drive circuit DR.
[0040] Image 6 Signal V when the present invention adopts the second method of embodiment os , voltage control signal V c , on-time, off-time...
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