Power supply circuit of shared power management module and corresponding method

Abstract

An embodiment of the invention discloses a power supply circuit of a sharing power supply management module and a corresponding method of the power supply circuit. The method comprises the steps (the steps are executed in a chip which can be operated together with the power supply management module) that (a) input signals from corresponding target equipment are received; (b) whether the power supply management module needs to be controlled is judged according to the input signals, and the power supply management module can be operated to provide a power supply for the corresponding target equipment; (c) if the power supply management module doe not need to be controlled, the chip is locked, and therefore control signals are not output to the power supply management module; (d) if the power supply management module needs to be controlled, request signals are sent to the power supply management module and executed, where (d1) whether the input signals received from the target equipment are conflict signals is detected, (d2) if the conflict signals are not detected, the power supply management module is controlled, and if the conflict signals are detected, the chip is delayed by a random time quantum, and the steps are executed from the step (d1). A plurality of chips can share the power supply management module in the method, and therefore cost is saved.

Description

technical field [0001] Embodiments of the present invention generally relate to the circuit field, and more specifically, relate to a power supply circuit of a shared power management module and a corresponding method thereof. Background technique [0002] LEDs are currently employed in a wide range of electronic applications including backlighting of liquid crystal display devices for personal computers, portable computers, high-resolution TVs, flash lights, and the like. LEDs have significant advantages over traditional lighting sources such as incandescent and fluorescent lamps, including high efficiency, good directionality, color stability, high reliability, long life, small size, and environmental safety. [0003] LEDs are current driven devices, meaning that the luminous flux (ie brightness) generated therefrom is primarily a function of the current applied therethrough. Therefore, regulating the current through the LED is an important control technique. To drive la...

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Problems solved by technology

This may be inconvenient for some chips with fewer pins

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