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Circuit for supplying power to chip by extracting low voltage from inductor

A power supply circuit and chip technology, applied in the direction of electrical components, etc., can solve complex and low power problems, and achieve the effect of stable current, simple circuit and perfect function

Inactive Publication Date: 2020-02-04
ZHEJIANG KAIYAO LIGHTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly solves the problems of complex power supply circuits for chips in the prior art and low utilization efficiency of electric energy; it provides a circuit for extracting low voltage from inductors to supply power to chips, which does not require additional chips, and the circuit is simple; extracting low voltage through inductors reduces power in the The loss on the resistance voltage divider improves the utilization rate of electric energy

Method used

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  • Circuit for supplying power to chip by extracting low voltage from inductor
  • Circuit for supplying power to chip by extracting low voltage from inductor
  • Circuit for supplying power to chip by extracting low voltage from inductor

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Embodiment

[0027] A circuit that extracts low voltage from the inductor to supply power to the chip, such as figure 1 As shown, it includes a rectification filter circuit 1, a chip drive circuit 2 and an output filter circuit 3 connected in sequence, and the chip drive circuit 2 includes a drive chip and peripheral circuits of the drive chip. The rectification and filtering circuit 1 includes a transformer module 11, a rectification module 12, a filter module 13 and a voltage stabilizing module 14 connected in sequence; the peripheral circuit of the drive chip includes a drive control module 21, a feedback module 22 and a chip power supply module 23 connected in sequence.

[0028] Such as figure 2 As shown, the voltage transformation module 11 includes a fuse F1, a varistor VD11, a common mode inductor L1, a common mode inductor L2 and a capacitor C1. The first end of the fuse F1 is connected to the live wire, the second end of the fuse F1 is connected to the first end of the varistor ...

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Abstract

The invention discloses a circuit for supplying power to a chip by extracting a low voltage from an inductor, in order to solve the problems that a power supply circuit of the chip is complicated andthe utilization efficiency of electric energy is low in the prior art. The circuit disclosed by the invention comprises a rectification filter circuit, a chip driving circuit and an output filtering circuit, which are sequentially connected, the chip driving circuit comprises a driving chip and a surrounding circuit of the driving chip; the surrounding circuit of the driving chip comprises a driving control module, a feedback module and a chip power supply module, which are connected in sequence; and the power supply module comprises an energy storage element capable of adjusting the output, and the energy storage element supplies power to the driving chip. The driving chip is powered by the inductor capable of controlling the output, so that the loss of the electric energy on a voltage dividing resistor is reduced, and the utilization efficiency of the electric energy is improved. The whole circuit consists of only three parts, therefore the circuit is simple, and the function is perfect.

Description

technical field [0001] The invention relates to the field of chip power supply, in particular to a circuit for extracting low voltage from an inductor to supply power to a chip. Background technique [0002] The input of the existing LED driver is the mains power, and the LED driver chip in the circuit needs a DC voltage of 5V, 12V or 24V which is much lower than the mains power. To the driver chip in the circuit. To supply power to the driver chip needs to go through so many circuits, the circuit is complicated and cumbersome; and the usual decompression circuit obtains a lower voltage through resistor division, so that most of the electric energy is converted into heat energy on the resistor and consumed , which causes energy loss and reduces the utilization rate of electric energy. [0003] For example, a "chip power supply circuit based on mains power conversion" disclosed in Chinese patent literature, its announcement number "CN 206575337 U", includes a rectification ...

Claims

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Application Information

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IPC IPC(8): H05B45/345H05B45/10H05B45/30
Inventor 印凌佳
Owner ZHEJIANG KAIYAO LIGHTING
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