Self-bias power management integrated circuit (PMIC) chip power supply

Abstract

The invention discloses a self-bias power management integrated circuit (PMIC) chip power supply which is composed of an inductor L of a power circuit of a switch-type inductive DC-DC or AC-DC converter, a master power switch S of the power circuit of the switch-type inductive DC-DC or AC-DC converter and a nonlinear network, wherein the master power switch S and the inductor L are combined to provide an efficient current source for the nonlinear network; the nonlinear network controls the on and off of the master power switch; and the nonlinear network is a network capable of controlling to switch between a through branch and a charging branch, and the nonlinear network controls the efficient current source to charge a chip power supply bypass capacitor. The PMIC chip power supply is built by aiming at the switch-type inductive DC-DC or AC-DC converter and making full use of inductor working properties, simplifies the existing two groups of circuits to build a PMIC chip power supply scheme, and enables the chip power supply to be built rapidly and reliably.

Description

technical field [0001] The invention belongs to the field of electronic technology, and relates to the power supply establishment of a power management integrated circuit chip; more specifically, the invention relates to a simple and efficient self-biased power management integrated circuit chip power supply scheme. Background technique [0002] In quite a lot of switch-type DC-DC or AC-DC converter applications, the power supply establishment of its power management integrated circuit chip is a challenging subject. How to self-bias the chip power supply with low cost, high efficiency, fast and reliable is very meaningful. In the application of a high-voltage switching DC-DC or AC-DC converter, if the high-voltage DC voltage is generated through a resistor divider circuit to generate the above-mentioned power management integrated circuit chip power, then the resistor divider circuit will generate considerable power consumption. Another method is to use two sets of circuits...

AI Technical Summary

Problems solved by technology

How to use this current source to build the power supply of the power management integrated circuit chip is just the problem that people need to solve urgently, so as to solve the existing scheme of using two sets of circuits to build the power supply of the power management integrated circuit chip, which has cost, complexity and low reliability The problem

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