Load power supply system suitable for dimming driving and power supply method

A power supply system and circuit technology, applied in the electronic field, can solve the problems of incomplete output current feedback, poor current sampling accuracy, and poor chip control consistency.

Active Publication Date: 2021-09-10
SHENZHEN KIWI MICROELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003]However, in such an architecture, the feedback on the output current is usually incomplete or inaccurate, the current sampling accuracy is poor, and the control consistency between chips is inconsistent good

Method used

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  • Load power supply system suitable for dimming driving and power supply method
  • Load power supply system suitable for dimming driving and power supply method
  • Load power supply system suitable for dimming driving and power supply method

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Embodiment Construction

[0025] In order to further understand the present invention, the preferred embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only to further illustrate the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0026] The description in this part is only for several typical embodiments, and the present invention is not limited to the scope of the description of the embodiments. Combinations of different embodiments, mutual replacement of some technical features in different embodiments, mutual replacement of the same or similar prior art means and some technical features in the embodiments are also within the scope of description and protection of the present invention.

[0027] "Coupling" or "connection" in the specification includes both direct connection and indirect connection. An indirect connection is a connection through an ...

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Abstract

The invention provides a load power supply system, a dimming driving system for a light emitting diode and a load power supply method. The load power supply system comprises: a first switch circuit for converting an input power supply signal into an output signal to supply power to a load based on a first switch, wherein the input power supply signal has a first reference ground; a first control circuit for controlling the first switch based on an adjusting signal, wherein the first control circuit is provided with a floating reference ground, and the floating reference ground and the first reference ground are not in common ground; and a signal generation circuit for generating the adjusting signal based on the input signal, wherein the reference ground of the signal generation circuit and the reference ground of the first control circuit are common-ground. The system and the method are used for realizing accurate sampling of current and realizing a flexible output current regulation function.

Description

technical field [0001] The present invention relates to the field of electronics, specifically but not limited to a load power supply system, a dimming drive system for light emitting diodes and a load power supply method. Background technique [0002] Driving schemes for light-emitting diodes (LEDs) include isolated and non-isolated driving schemes. The non-isolated driving scheme is lower in cost and smaller in size because it does not require transformer devices. At the same time, in many applications of light-emitting diodes, it is necessary to adjust their brightness. Existing non-isolated dimming schemes for light-emitting diodes basically use a structure that shares the same reference ground as the input power supply, and the reference ground is usually the ground. Its advantage is that the structure is simple, and because the driving of the power switch is based on the ground, it is convenient to dim the LED. [0003] However, in such an architecture, the feedback ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/219H02M1/00H05B45/14H05B45/325H05B45/3725H05B47/19
CPCH02M7/219H02M1/00H05B45/3725H05B45/14H05B45/325H05B47/19
Inventor 刘白仁
Owner SHENZHEN KIWI MICROELECTRONICS CO LTD
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