An Adaptive Soft-Start Circuit with Unsteady Current Limit
A technology of soft-start circuit and current limitation, which is applied in the direction of electrical components, adjusting electrical variables, control/regulation systems, etc., can solve the problems of long start-up time, burned chips, high duty cycle, etc., and achieve the effect of reducing process deviation
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[0020] The present invention will be described in detail below with reference to the drawings and specific embodiments.
[0021] The present invention is suitable for switching converters. The following takes the current mode switching converter as an example, such as figure 1 Shown is the structural block diagram of the adaptive soft-start circuit with astable current limit provided by the present invention, including an adaptive soft-start voltage generating circuit and a voltage selection circuit, the current-to-analog switching converter includes an error amplifier EA, and an adaptive soft start The first input terminal of the voltage generating circuit is connected to the first bias voltage Vref1, the second input terminal is connected to the output signal EA_OUT of the error amplifier EA, and the output terminal outputs the soft start signal SS_OUT which is connected to the first input terminal of the voltage selection circuit; The second input terminal of the circuit is con...
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