Fast charging protocol chip and system thereof

Abstract

The embodiment of the invention provides a fast charging protocol chip and a system thereof. The fast charging protocol chip provided by the embodiment of the invention comprises an internal power supply module which is configured to generate an internal power supply voltage for supplying power to an internal circuit of the fast charging protocol chip based on an input voltage of the fast charging protocol chip; the power switch tube is connected between the internal power supply module and an internal power supply pin of the fast charge protocol chip; and the slope detection module is configured to detect the change slope of the input voltage of the fast charge protocol chip and control the on and off of the power switch tube based on the change slope of the input voltage of the fast charge protocol chip. The slope detection module is used for controlling the on and off of the power switch tube, so that the power failure of the internal power supply voltage of the chip can be prevented, that is, the out-of-control of the chip cannot be caused, and the area of the chip can be saved.

Description

technical field [0001] The present invention generally relates to the field of integrated circuits, in particular to a fast charging protocol chip and a system thereof. Background technique [0002] Generally, in fast charging applications, it may be encountered that the output VBUS is short-circuited to ground. In this case, more and more applications hope that the fast charging protocol chip itself will not go out of control, that is, to supply power to the internal circuit of the chip The internal supply voltage will not drop below the power supply reset voltage threshold. In the prior art, the technical means adopted to solve this technical problem are usually to use the anti-phase blocking of the Schottky diode, so that the internal power supply voltage will not drop rapidly. [0003] However, in some processes, this Schottky diode needs to use an additional mask, which increases the cost of the system; in addition, even if no additional mask is added in the process, a...

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Problems solved by technology

[0003] However, in some processes, this Schottky diode needs to use an additional mask, which increases the cost of the system; in addition, even if no additional mask is added in the process, as the power consumption of the chip increases , in order to make the voltage drop of the Schottky diode meet the requirements, the area of ​​the Schottky diode increases accordingly, which in turn leads to an increase in the area of ​​the chip and an increase in the cost of the chip

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