Integration circuit and integration method thereof

Abstract

The invention provides an integrating circuit and an integrating method thereof. The integrating circuit comprises: an error amplifier for amplifying and outputting a difference value between a reference voltage and a feedback voltage; a first switch and a second switch which are sequentially connected to the output end of the error amplifier; a first capacitor connected between the output end ofthe error amplifier and the ground; a second capacitor connected between the output end of the first switch and the ground; a third capacitor connected between the output end of the second switch andthe ground, wherein switching signals of the first switch and the second switch are opposite in phase. The difference between the reference voltage and the feedback voltage is amplified to obtain an error voltage, the error voltage is filtered to generate a compensation voltage, the compensation voltage is processed by the control module to generate a feedback voltage, a feedback loop is formed, loop integration is further realized, and the mean value of the feedback voltage is equal to the reference voltage value. The integrating circuit is simple in structure and high in integration level, alarge filter capacitor can be omitted, a peripheral circuit is simplified, the system cost is reduced, and the failure problem caused by the peripheral filter capacitor is thoroughly eliminated.

Description

technical field [0001] The invention relates to the field of integrated circuit design, in particular to an integrating circuit and an integrating method thereof. Background technique [0002] With the continuous upgrading of LED drive circuits, the simplification of peripheral circuits, the low cost of the overall solution, and high reliability have become the direction and goal that everyone has unanimously recognized. In the field of LED driving technology, a closed-loop control loop is often required to stabilize the average value of the sampling voltage at the reference voltage value, so as to control the LED driving system to work stably with a preset output. [0003] The traditional closed-loop control loop needs to be connected to a filter capacitor with a large capacitance. Since the filter capacitor has a large capacitance, it cannot be integrated into the chip. Therefore, the filter capacitor needs to be set outside the chip. Therefore, it needs to be reserved on ...

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Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an integrating circuit and its integrating method, which are used to solve the problems of complex peripheral circuits, high cost, and high failure risk of the closed-loop control loop chip in the prior art.

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