Soft starting circuit for voltage regulator
A technology of soft-start circuit and voltage regulator, which is applied in the field of power supply, can solve the problems of increasing EMI (ElectroMagneticInterference processing difficulty, reducing chip conversion efficiency, power loss, etc.), to avoid stability problems, low power consumption, and avoid output voltage The effect of the step problem
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[0013] The principle and working process of the soft start circuit proposed by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0014] Figure 4 The overall block diagram of the voltage regulator using the soft start circuit of the present invention is given, which includes an On_Timer timer module and a loop comparator Loop_Comp module in addition to the soft start circuit Soft_Start module.
[0015] Such as Figure 4 As shown, the Soft_Start module includes a switch device SW1, a capacitor Css, a resistor R1, bias current sources Ibias1 and Ibias2, and an operational amplifier OP, wherein the OP is connected in the form of negative feedback to form a Buffer, and the potential of the output terminal L73 of the OP is clamped to be equal to the potential above the capacitor Css.
[0016] The specific connection relationship is: the switching device SW1 and the capacitor Css are connected between ...
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