Regulation circuit capable of controlling load switch

Abstract

The invention discloses a regulation circuit capable of controlling a load switch. The regulation circuit capable of controlling the load switch can be applied to a load circuit containing a load switch and at least one operation member; the regulation circuit capable of controlling the load switch comprises a first comparator, a second comparator and a third comparator; the first comparator conducts a connected first switch when inductive current reaches preset average current; the second comparator conducts the connected second switch when the inductive current reaches preset ripple current; when either of the first switch and the second switch is conducted, the load switch is switched off; when the load switch is switched off, variable voltage is increased; when the first switch is conducted, voltage of a controlled capacitor is boosted and switching-off time is increased; when the second switch is conducted, voltage of a controlled capacitor is reduced and switching-off time is shortened, so that the switching-off time of the load switch is regulated.

Description

technical field [0001] The invention relates to a controllable load switch adjustment circuit, in particular to a controllable load switch adjustment circuit which uses three comparators and two switches to adjust the average current. Background technique [0002] see figure 1 , figure 1 A schematic circuit diagram showing an integrated circuit of light-emitting diodes in the prior art, such as figure 1 As shown, the existing light-emitting diode integrated circuit PA1 includes a load circuit PA11 and a driving circuit PA12, the load circuit PA11 is a light-emitting diode circuit, and includes a voltage source PA111, a full-bridge rectifier circuit PA112, a A resistor PA113 , a diode PA114 , a capacitor PA115 , at least one light emitting diode PA116 , an inductor PA117 , a first switch PA118 , a resistor PA119 , a capacitor PA120 and a capacitor PA121 . [0003] The full-bridge rectifier circuit PA112 is coupled to the voltage source PA111, and is coupled to the resistor...

AI Technical Summary

Problems solved by technology

[0006] In view of the limitation of the structure of the existing circuit design, there is generally a problem of large fluctuations in the inductance value, resulting in large ripples, which in turn cause high costs.

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