Pulse-width modulation controller for switching voltage stabilizer
A pulse width modulation and controller technology, which is applied in the direction of output power conversion devices, electrical components, etc., and can solve problems such as adding external components.
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[0018] In order to make the above-mentioned and other objects, features and advantages of the present invention more obvious and understandable, the preferred embodiments of the present invention will be specifically cited below, together with the accompanying drawings, for detailed description as follows:
[0019] The invention adopts the transconductance amplifier as the error amplifier, and controls the output current of the transconductance amplifier at the beginning of the start-up of the switching voltage regulator so that the output current rises slowly, and then slowly charges the compensation load. In this way, the duty cycle of the PWM output signal of the PWM comparator can be increased flexibly, so as to prevent the switching regulator from outputting overvoltage and overcurrent at the beginning of start-up and damaging the switching power components.
[0020] The following describes in detail the soft start method of the present invention applied to the switching r...
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