Voltage changer and voltage changing system

Abstract

The invention provides a voltage changer and a voltage changing system. A first circuit of the voltage changer outputs a common voltage on one of a first output end and a second output end according to an input signal and a received common voltage; a second current circuit conducts one, which does not receive the common voltage, of a third output end and a fourth output end to a second voltage according to a received triggering signal; and a switch circuit selects one of a third connection end and a fourth connection end to output the triggering signal according to the common voltage received by one of a first connection end and a second connection end and a bias voltage received by a bias voltage connection end so that a second current circuit coupled with the connection end outputting the triggering signal boosts the voltage of the output end which dose not output the common voltage to a second voltage. By using the voltage changer and the voltage changing system, the triggering signal restricts the conduction degree of the second current circuit, and the current drive capability can be enhanced with no need of increasing the distribution area, thereby effectively shortening the distribution area and reducing short-circuit current.

Description

technical field [0001] The invention relates to voltage conversion technology, in particular to a voltage converter and a voltage conversion system. Background technique [0002] The transformer can receive the input signal with a small signal range and convert it into an output signal with a large signal range correspondingly, and is an important component in the interface circuit. For example, in the source driver chip driving the display panel, the signal range of the original control signal in the chip is 0 to 2 volts, but when it is output to the source electrode driving the display panel, the signal range required It may be necessary to expand to 0 to 5 volts. In order to smoothly convert between the two signal ranges, a transformer is needed to convert the 0 to 2 volt input signal into a 0 to 5 volt output signal. [0003] figure 1 It is a structural schematic diagram of an existing converter. Please refer to figure 1 , which shows a conventional transformer 10 ....

AI Technical Summary

Problems solved by technology

In order to meet a sufficiently large channel width-to-length ratio, the layout area of ​​the existing converter 10 cannot be effectively reduced

[0006] In addition, when the input signal undergoes the aforementioned transition, the large current turned on by the transistor TP1 will also cause a short-circuit current with a large current and a long duration during the competition period, which will affect the characteristics of the existing converter 10, such as transient power consume

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