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Switching type multi-power management circuit with extremely low power consumption

A technology for managing circuits and power switch tubes, which is applied in electrical components, output power conversion devices, and irreversible AC power input to DC power output, etc., to ensure high efficiency and stable and reliable operation.

Inactive Publication Date: 2012-04-18
成都成电硅海科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the linear power supply system is input at high voltage, the step-down device withstands high voltage and large current, and it will have a huge power consumption

Method used

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  • Switching type multi-power management circuit with extremely low power consumption
  • Switching type multi-power management circuit with extremely low power consumption
  • Switching type multi-power management circuit with extremely low power consumption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] figure 1 A typical block diagram of an existing scheme. This scheme realizes the typical application of LED driving by the power management IC. The scheme consists of a step-down device 1, an operational amplifier OP 2, a control module controller 3, a resistor network module Rnet 4, a power switch tube 5, a diode 6, an inductor 7, a capacitor 8, an LED lamp 9, an AC input 10, and a full-bridge rectifier 11 12 are composed of chip power supply capacitors.

[0015] In the existing solution, the high-voltage input charges the chip power supply capacitor 12 through the step-down device 1 to generate the internal power supply VCC of the chip. After VCC is divided by the resistor network Rnet 4, it is compared with the chip reference voltage through the operational amplifier OP 2, and the comparison result is input to the step-down device to adjust the flowing current value, and finally adjust the voltage value of the capacitor 12. The power supply mode of the existing so...

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Abstract

The invention discloses a switching type multi-power management circuit with extremely low power consumption, and relates to an integrated circuit technology. The switching type multi-power management circuit comprises a resistor network module and a power transistor, and further comprises a step-down transformer, an internal low-dropout voltage modulator, a comparator, a low-voltage control module and an intermediate voltage module, wherein the VCC end of the low-voltage control module is connected to a first connection point through the internal low-dropout voltage modulator; the first connection point is connected to the first input end of the comparator through the resistor network module; the low-voltage control module is also connected with the second input end of the comparator; the first connection point is connected with the intermediate voltage module which is connected with the gate of the power transistor; the gate of the power transistor is also connected to the third input end of the comparator of which the output end is connected to the control end of the step-down transformer; and one end of the step-down transformer is connected with the first connection point, and the other end of the step-down transformer is connected with an output point which is connected with the power transistor. The switching type multi-power management circuit can work stably and reliably within the universal alternating current input range of 85 to 265VAC, and high system efficiency can be ensured.

Description

technical field [0001] The present invention relates to integrated circuit technology. Background technique [0002] The power management chip refers to a type of IC that can obtain a stable output voltage within the general AC input range of 85VAC to 265VAC, and can also realize a wide range of DC-DC output. [0003] The power consumption in the power management chip system mainly includes the power consumption of the power switch itself, the power consumption of the power supply, the power consumption of the gate drive, and the power consumption of the control module. The power consumption of the power supply is second only to the power consumption of the power switch tube itself, and is the second largest power consumption source of the entire power management chip. The power supply system in the traditional power management system implements linear step-down to supply power to the chip through resistance and capacitance voltage division. This method is a common linear p...

Claims

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Application Information

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IPC IPC(8): H02M7/04H02M1/08
Inventor 罗杰李文昌于廷江黄国辉刘剑
Owner 成都成电硅海科技股份有限公司
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