WO2017181493A1 - Power circuit for led light adjusting plate - Google Patents

Power circuit for led light adjusting plate Download PDF

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Publication number
WO2017181493A1
WO2017181493A1 PCT/CN2016/084149 CN2016084149W WO2017181493A1 WO 2017181493 A1 WO2017181493 A1 WO 2017181493A1 CN 2016084149 W CN2016084149 W CN 2016084149W WO 2017181493 A1 WO2017181493 A1 WO 2017181493A1
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WO
WIPO (PCT)
Prior art keywords
power supply
pin
capacitor
power
resistor
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PCT/CN2016/084149
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French (fr)
Chinese (zh)
Inventor
吴斌
代都林
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成都艾尔伯特科技有限责任公司
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Publication of WO2017181493A1 publication Critical patent/WO2017181493A1/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]

Definitions

  • the present invention relates to a power supply circuit for an LED dimming plate.
  • the dimming of the LED display screen is generally controlled by the dimming plate, and the dimming plate inevitably needs to be powered.
  • the stability of the power supply circuit of the dimming plate plays a vital role in the dimming of the LED display. . technical problem
  • the object of the present invention is to overcome the deficiencies of the prior art, and provide a power supply circuit for an LED dimming plate, which is powered by a power chip, and is filtered by three grounding capacitors before output, and has a simple structure and power supply. stable.
  • a power supply circuit for an LED dimming plate comprising a power chip UP, a voltage input pin IN of the power chip UP is connected to a first common point, a power chip
  • the enable pin EN of the UP is connected to the first common point through the first resistor R1, and the first common point is connected to the working power source;
  • the grounding pin GND of the power chip UP is grounded;
  • the compensating pin COMP of the power chip UP passes through the third capacitor C3 and The sixth resistor R6 is grounded;
  • the feedback pin FB of the power chip is grounded through the second common point, the third common point, and the fifth resistor R5;
  • the power supply output pin SW of the power chip UP is connected to the first end of the inductor L1,
  • the other end of the second resistor R2 is connected to the fourth common point; the fourth common point is connected to the second common point through the third resistor R3, and the fourth common point is connected to the third common point through the fourth resistor R4; second Three parallel grounding capacitors are provided between the output of the power circuit and the output of the power circuit.
  • the first common point is also connected with a grounded first capacitor Cl.
  • the power chip UP uses the MP2403.
  • the soft start control pin SS of the power chip UP is grounded through the second capacitor.
  • the three grounding capacitors include a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6; the fourth capacitor C4 and the fifth capacitor C5 are electrolytic capacitors having the same capacitance; the sixth capacitor C6 It is a ceramic capacitor.
  • a voltage stabilizing integrated circuit is further included, and the output end of the power circuit is connected to the voltage stabilizing integrated circuit, and the voltage stabilizing integrated circuit is used for power output.
  • the voltage stabilizing integrated circuit includes a TAR5S50.
  • the beneficial effects of the present invention are as follows: (1) The power supply chip is used for power supply, and the power supply circuit has a simple structure.
  • the power supply circuit uses three grounding capacitors for power supply filtering before output, and the power supply is stable.
  • the three grounding capacitors between the second end of the inductor and the output end of the power circuit have both an electrolytic capacitor and a ceramic capacitor; due to the structural characteristics of the electrolytic capacitor, the capacity is large, and the equivalent series inductance is large. It has a good absorption and suppression effect on low-frequency interference, and the equivalent series inductance of the ceramic capacitor is small, so it is good to absorb high-frequency interference.
  • the electrolytic capacitor and the ceramic capacitor are grounded in parallel, which can filter the power supply more effectively.
  • a voltage stabilizing integrated circuit is provided, and the output end of the power circuit is connected to the voltage stabilizing integrated circuit, and the power supply output is output by the voltage stabilizing integrated circuit, thereby further improving the stability of the power supply.
  • 1 is a circuit schematic diagram of the present invention.
  • FIG. 2 is a schematic diagram of a voltage stabilizing integrated circuit.
  • a power supply circuit for an LED dimming plate includes a power chip UP, and a voltage input pin IN of the power chip UP is connected to a first common point XI, and an enable pin EN of the power chip UP Connected to the first common point XI through the first resistor R 1 , the first common point XI is connected to the working power supply; the grounding pin G ND of the power chip UP is grounded; the compensation pin COMP of the power chip UP passes through the third capacitor C3 and the sixth The resistor R6 is grounded; the feedback pin FB of the power chip is grounded through the second common point X2, the third common point X3, and the fifth resistor R5; the power supply output pin SW of the power chip UP is connected to the first end a of the inductor L1, The second end b of the inductor L1 is respectively connected to the power supply circuit output terminal OUT and the second resistor R2 - terminal; the boosting pin BS of the power chip UP is connected
  • the other end of the second resistor R2 is connected to the fourth common point X4; the fourth common point X4 is connected to the second common point X2 through the third resistor R3, and the fourth common point X4 is passed through the fourth resistor R4 and the third Public point X 3 connection;
  • the first common point XI is further connected with a grounded first capacitor Cl.
  • the first capacitor C1 is an electrolytic capacitor, the anode thereof is connected to the first common point, and the cathode is grounded.
  • the power chip UP adopts MP2403, and the MP2403 is a step-down DC-DC chip, which adopts a SOP-8 pin package; the power chip MP2403 has a pin 2 as a boosting pin BS and a pin 2 as a voltage.
  • Input pin IN pin 3 is the power supply output pin SW
  • pin 4 is the ground pin GND
  • pin 5 is the feedback pin FB
  • pin 6 is the compensating pin COMP
  • pin 7 is the enable pin EN
  • pin 8 is the soft start control pin SS, using the chip as a power chip, the power circuit has the advantages of simple structure and stable power supply.
  • the soft start control pin SS of the power chip UP is grounded through the second capacitor C2.
  • the second capacitor C2, the third capacitor C3, and the seventh capacitor C7 are all ceramic capacitors.
  • the three grounding capacitors include a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6; the fourth capacitor C4 and the fifth capacitor C5 are electrolytic capacitors having the same capacitance; the sixth capacitor C6 It is a ceramic capacitor.
  • the anode of the fourth capacitor C4 is connected between the second end of the inductor L1 and the output terminal OUT of the power supply circuit, and the cathode of the fourth capacitor C4 is grounded.
  • the anode of the fifth capacitor C5 is connected between the second end of the inductor L1 and the output terminal OUT of the power supply circuit, fifth Grounding of the negative pole of capacitor C5
  • three grounding capacitors are used for power supply filtering, and the power supply is stable.
  • the three grounding capacitors before the output of the power circuit have both electrolytic capacitors and ceramic capacitors; due to the structural characteristics of the electrolytic capacitors, the capacity is large.
  • the equivalent series inductance is large, which has good absorption and suppression for low frequency interference, but has no good effect on high frequency interference, and the equivalent series inductance of ceramic capacitor is small, so it is good to absorb high frequency interference.
  • the electrolytic capacitor and the ceramic capacitor are grounded in parallel, which can filter the power supply more effectively. There are two electrolytic capacitors with the same capacitance value in the three grounding capacitors, and the grounding in parallel can effectively reduce the equivalent inductance.
  • the present application further includes a voltage stabilizing integrated circuit
  • the output terminal OUT of the power circuit is connected to the voltage stabilizing integrated circuit, and the voltage stabilizing integrated circuit performs power output, thereby further improving the stability of the power supply.
  • the voltage stabilization integrated circuit includes a TAR5S50.
  • 1 pin is the control pin
  • 2 pin is the ground pin
  • 3 pin is the noise suppression pin
  • 4 pin is the output pin
  • 5 pin is the input pin
  • TAR5S50 input pin and power supply circuit The output terminal OUT is connected; and an input voltage is connected between the input pin and the power circuit output terminal; the output pin is used for power output, and a grounded 1 (VF) is connected between the output pin and the output end of the voltage stabilization integrated circuit.
  • Capacitor The noise suppression pin is grounded through the noise suppression capacitor of O.Ol F, and the grounding pin is directly grounded.
  • the control pin is connected to the input pin.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Led Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

A power circuit for an LED light adjusting plate, comprising a power supply chip (UP). A voltage input pin (IN) of the power supply chip (UP) is connected to a first common point; an enable pin (EN) of the power supply chip (UP) is connected to the first common point by means of a first resistor (R1); the first common point is connected to a working power supply. A feedback pin (FB) of the power supply chip is grounded by means of a fifth resistor (R5). A switching power supply output pin (SW) of the power supply chip (UP) is connected to a first end of an inductor (L1). A second end of the inductor (L1) is separately connected to a power circuit output end (OUT) and one end of a second resistor (R2). A booster pin (BS) of the power supply chip (UP) is connected between the switching power supply output pin (SW) and the first end of the inductor (L1) by means of a capacitor (C7). The other end of the second resistor (R2) is connected between the feedback pin (FB) of the power supply chip and the fifth resistor (R5) by means of a third resistor (R3) and a fourth resistor (R4) that are connected in parallel. Three grounded capacitors (C4, C5, C6) are provided between the second end of the (L1) and the power circuit output end (OUT). By supplying power using the power supply chip (UP), and configuring the three grounded capacitors (C4, C5, C6) before the output end for filtering, the power circuit is simple in structure and stable during power supply.

Description

一种用于 LED调光板的电源电路  Power supply circuit for LED dimming plate
技术领域  Technical field
[0001] 本发明涉及一种用于 LED调光板的电源电路。  [0001] The present invention relates to a power supply circuit for an LED dimming plate.
背景技术  Background technique
[0002] 为保障大型灭火、 水上救援水陆两栖飞机航电系统顺利研制、 试飞和产品定型 ， 需要建设航电综合试验室进行模拟实验， 而在进行实验的过程中， 模拟座舱 是非常重要的一个组成部分， 模拟座舱中必定会涉及 LED显示屏， LED显示屏的 调光非常重要。  [0002] In order to ensure the smooth development, flight test and product sizing of large-scale fire-fighting and water-rescue amphibious aircraft avionics systems, it is necessary to construct aeronautical-electrical comprehensive laboratory for simulation experiments. In the course of conducting experiments, simulating the cockpit is a very important one. As part of the simulation, the LED display must be involved in the analog cockpit. The dimming of the LED display is very important.
[0003] LED显示屏的调光一般是通过调光板来控制的， 调光板不可避免的需要进行供 电， 调光板电源电路的稳定性对于 LED显示屏的调光有着至关重要的作用。 技术问题  [0003] The dimming of the LED display screen is generally controlled by the dimming plate, and the dimming plate inevitably needs to be powered. The stability of the power supply circuit of the dimming plate plays a vital role in the dimming of the LED display. . technical problem
[0004] 本发明的目的在于克服现有技术的不足， 提供一种用于 LED调光板的电源电路 ， 通过电源芯片进行供电， 并且进行输出前采用三个接地电容进行滤波， 结构 简单， 供电稳定。  [0004] The object of the present invention is to overcome the deficiencies of the prior art, and provide a power supply circuit for an LED dimming plate, which is powered by a power chip, and is filtered by three grounding capacitors before output, and has a simple structure and power supply. stable.
问题的解决方案  Problem solution
技术解决方案  Technical solution
[0005] 本发明的目的是通过以下技术方案来实现的： 一种用于 LED调光板的电源电路 ， 包括电源芯片 UP， 电源芯片 UP的电压输入脚 IN连接到第一公共点、 电源芯片 UP的使能脚 EN通过第一电阻 R1连接到第一公共点， 第一公共点与工作电源连接 ； 电源芯片 UP的接地脚 GND接地； 电源芯片 UP的补偿脚 COMP依次通过第三电 容 C3和第六电阻 R6接地； 电源芯片的反馈脚 FB依次通过第二公共点、 第三公共 点和第五电阻 R5接地； 电源芯片 UP的幵关电源输出脚 SW与电感 L 1的第一端连 接、 电感 L1的第二端分别与电源电路输出端和第二电阻 R2—端连接； 电源芯片 UP的升压脚 BS通过第七电容 C7连接到幵关电源输出脚 SW与电感 L1第一端之间 ； 第二电阻 R2的另一端连接到第四公共点； 第四公共点通过第三电阻 R3与第二 公共点连接， 第四公共点通过第四电阻 R4与第三公共点连接； 电感 L1的第二端 和电源电路输出端之间设置有三个并联的接地电容。 [0005] The object of the present invention is achieved by the following technical solutions: A power supply circuit for an LED dimming plate, comprising a power chip UP, a voltage input pin IN of the power chip UP is connected to a first common point, a power chip The enable pin EN of the UP is connected to the first common point through the first resistor R1, and the first common point is connected to the working power source; the grounding pin GND of the power chip UP is grounded; the compensating pin COMP of the power chip UP passes through the third capacitor C3 and The sixth resistor R6 is grounded; the feedback pin FB of the power chip is grounded through the second common point, the third common point, and the fifth resistor R5; the power supply output pin SW of the power chip UP is connected to the first end of the inductor L1, The second end of the inductor L1 is respectively connected to the output terminal of the power supply circuit and the second resistor R2 - the boosting pin BS of the power chip UP is connected between the bypass power supply output pin SW and the first end of the inductor L1 through the seventh capacitor C7. The other end of the second resistor R2 is connected to the fourth common point; the fourth common point is connected to the second common point through the third resistor R3, and the fourth common point is connected to the third common point through the fourth resistor R4; second Three parallel grounding capacitors are provided between the output of the power circuit and the output of the power circuit.
[0006] 所述的第一公共点上还连接有接地的第一电容 Cl。  [0006] The first common point is also connected with a grounded first capacitor Cl.
[0007] 所述的电源芯片 UP采用 MP2403。 [0007] The power chip UP uses the MP2403.
[0008] 所述的电源芯片 UP的软启动控制脚 SS通过第二电容接地。  [0008] The soft start control pin SS of the power chip UP is grounded through the second capacitor.
[0009] 所述的三个接地电容包括第四电容 C4、 第五电容 C5和第六电容 C6; 所述的第 四电容 C4和第五电容 C5为容值相同的电解电容； 第六电容 C6为瓷片电容。  [0009] The three grounding capacitors include a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6; the fourth capacitor C4 and the fifth capacitor C5 are electrolytic capacitors having the same capacitance; the sixth capacitor C6 It is a ceramic capacitor.
[0010] 还包括一个稳压集成电路， 电源电路输出端与稳压集成电路连接， 稳压集成电 路进行电源输出。 [0010] A voltage stabilizing integrated circuit is further included, and the output end of the power circuit is connected to the voltage stabilizing integrated circuit, and the voltage stabilizing integrated circuit is used for power output.
[0011] 所述的稳压集成电路包括 TAR5S50。  [0011] The voltage stabilizing integrated circuit includes a TAR5S50.
发明的有益效果  Advantageous effects of the invention
有益效果  Beneficial effect
[0012] 本发明的有益效果是： （1) 采用电源芯片进行供电， 电源电路结构简单。  [0012] The beneficial effects of the present invention are as follows: (1) The power supply chip is used for power supply, and the power supply circuit has a simple structure.
[0013] (2) 电源电路在输出前采用三个接地电容进行电源滤波， 供电稳定。 [0013] (2) The power supply circuit uses three grounding capacitors for power supply filtering before output, and the power supply is stable.
[0014] (3) 电感第二端和电源电路输出端之间三个接地电容中既有电解电容， 又有 瓷片电容； 由于电解电容的结构特性， 其容量大， 等效串联电感大， 对低频干 扰有很好的吸收和抑制作用， 而瓷片电容的等效串联电感很小， 所以利于吸收 高频干扰； 将电解电容和瓷片电容并联接地， 能够更加有效地对电源进行滤波 [0014] (3) The three grounding capacitors between the second end of the inductor and the output end of the power circuit have both an electrolytic capacitor and a ceramic capacitor; due to the structural characteristics of the electrolytic capacitor, the capacity is large, and the equivalent series inductance is large. It has a good absorption and suppression effect on low-frequency interference, and the equivalent series inductance of the ceramic capacitor is small, so it is good to absorb high-frequency interference. The electrolytic capacitor and the ceramic capacitor are grounded in parallel, which can filter the power supply more effectively.
[0015] (4) 电源电路输出前的三个接地电容中有两个容值相同的电解电容， 且并联 接地， 能够有效减小等效电感。 [0015] (4) There are two electrolytic capacitors with the same capacitance value among the three grounding capacitors before the output of the power circuit, and the grounding in parallel can effectively reduce the equivalent inductance.
[0016] (5) 设置有稳压集成电路， 电源电路输出端与稳压集成电路连接， 由稳压集 成电路进行电源输出， 从而进一步提高了供电电源的稳定性。 [0016] (5) A voltage stabilizing integrated circuit is provided, and the output end of the power circuit is connected to the voltage stabilizing integrated circuit, and the power supply output is output by the voltage stabilizing integrated circuit, thereby further improving the stability of the power supply.
对附图的简要说明  Brief description of the drawing
附图说明  DRAWINGS
[0017] 图 1为本发明的电路原理图。 1 is a circuit schematic diagram of the present invention.
[0018] 图 2为稳压集成电路的原理图。 本发明的实施方式 2 is a schematic diagram of a voltage stabilizing integrated circuit. Embodiments of the invention
[0019] 下面结合附图进一步详细描述本发明的技术方案， 但本发明的保护范围不局限 于以下所述。  [0019] The technical solution of the present invention will be described in further detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following.
[0020] 如图 1所示， 一种用于 LED调光板的电源电路， 包括电源芯片 UP， 电源芯片 UP 的电压输入脚 IN连接到第一公共点 XI、 电源芯片 UP的使能脚 EN通过第一电阻 R 1连接到第一公共点 XI， 第一公共点 XI与工作电源连接； 电源芯片 UP的接地脚 G ND接地； 电源芯片 UP的补偿脚 COMP依次通过第三电容 C3和第六电阻 R6接地； 电源芯片的反馈脚 FB依次通过第二公共点 X2、 第三公共点 X3和第五电阻 R5接地 ； 电源芯片 UP的幵关电源输出脚 SW与电感 L1的第一端 a连接、 电感 L1的第二端 b 分别与电源电路输出端 OUT和第二电阻 R2—端连接； 电源芯片 UP的升压脚 BS通 过第七电容 C7连接到幵关电源输出脚 SW与电感 L1第一端 a之间； 第二电阻 R2的 另一端连接到第四公共点 X4; 第四公共点 X4通过第三电阻 R3与第二公共点 X2连 接， 第四公共点 X4通过第四电阻 R4与第三公共点 X3连接； 电感 L1的第二端和电 源电路输出端 OUT之间设置有三个并联的接地电容。  [0020] As shown in FIG. 1, a power supply circuit for an LED dimming plate includes a power chip UP, and a voltage input pin IN of the power chip UP is connected to a first common point XI, and an enable pin EN of the power chip UP Connected to the first common point XI through the first resistor R 1 , the first common point XI is connected to the working power supply; the grounding pin G ND of the power chip UP is grounded; the compensation pin COMP of the power chip UP passes through the third capacitor C3 and the sixth The resistor R6 is grounded; the feedback pin FB of the power chip is grounded through the second common point X2, the third common point X3, and the fifth resistor R5; the power supply output pin SW of the power chip UP is connected to the first end a of the inductor L1, The second end b of the inductor L1 is respectively connected to the power supply circuit output terminal OUT and the second resistor R2 - terminal; the boosting pin BS of the power chip UP is connected to the first power supply output pin SW and the first end of the inductor L1 through the seventh capacitor C7. Between a; the other end of the second resistor R2 is connected to the fourth common point X4; the fourth common point X4 is connected to the second common point X2 through the third resistor R3, and the fourth common point X4 is passed through the fourth resistor R4 and the third Public point X 3 connection; There are three parallel grounding capacitors between the second end of the inductor L1 and the output terminal of the power circuit.
[0021] 所述的第一公共点上 XI还连接有接地的第一电容 Cl， 进一步地， 第一电容 C1 为电解电容， 其正极与第一公共点连接， 其负极接地。  [0021] The first common point XI is further connected with a grounded first capacitor Cl. Further, the first capacitor C1 is an electrolytic capacitor, the anode thereof is connected to the first common point, and the cathode is grounded.
[0022] 所述的电源芯片 UP采用 MP2403 , MP2403是一个降压型的 DC-DC芯片， 其采 用 S0P-8的引脚封装； 电源芯片 MP2403的 1脚为升压脚 BS， 2脚为电压输入脚 IN ， 3脚为幵关电源输出脚 SW， 4脚为接地脚 GND， 5脚为反馈脚 FB， 6脚为补偿脚 COMP, 7脚为使能脚 EN， 8脚为软启动控制脚 SS， 采用该芯片作为电源芯片， 电源电路具有结构简单、 供电稳定的优点。  [0022] The power chip UP adopts MP2403, and the MP2403 is a step-down DC-DC chip, which adopts a SOP-8 pin package; the power chip MP2403 has a pin 2 as a boosting pin BS and a pin 2 as a voltage. Input pin IN, pin 3 is the power supply output pin SW, pin 4 is the ground pin GND, pin 5 is the feedback pin FB, pin 6 is the compensating pin COMP, pin 7 is the enable pin EN, pin 8 is the soft start control pin SS, using the chip as a power chip, the power circuit has the advantages of simple structure and stable power supply.
[0023] 所述的电源芯片 UP的软启动控制脚 SS通过第二电容 C2接地。  [0023] The soft start control pin SS of the power chip UP is grounded through the second capacitor C2.
[0024] 进一步地， 所述的第二电容 C2、 第三电容 C3、 第七电容 C7均为瓷片电容。  [0024] Further, the second capacitor C2, the third capacitor C3, and the seventh capacitor C7 are all ceramic capacitors.
[0025] 所述的三个接地电容包括第四电容 C4、 第五电容 C5和第六电容 C6; 所述的第 四电容 C4和第五电容 C5为容值相同的电解电容； 第六电容 C6为瓷片电容。  [0025] The three grounding capacitors include a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6; the fourth capacitor C4 and the fifth capacitor C5 are electrolytic capacitors having the same capacitance; the sixth capacitor C6 It is a ceramic capacitor.
[0026] 第四电容 C4的正极连接在电感 L1的第二端和电源电路输出端 OUT之间， 第四 电容 C4的负极接地。  The anode of the fourth capacitor C4 is connected between the second end of the inductor L1 and the output terminal OUT of the power supply circuit, and the cathode of the fourth capacitor C4 is grounded.
[0027] 第五电容 C5的正极连接在电感 L 1的第二端和电源电路输出端 OUT之间， 第五 电容 C5的负极接地 [0027] The anode of the fifth capacitor C5 is connected between the second end of the inductor L1 and the output terminal OUT of the power supply circuit, fifth Grounding of the negative pole of capacitor C5
[0028] 本申请中采用三个接地电容进行电源滤波， 供电稳定， 电源电路输出前的三个 接地电容中既有电解电容， 又有瓷片电容； 由于电解电容的结构特性， 其容量 大， 等效串联电感大， 对低频干扰有很好的吸收和抑制作用， 但对高频干扰却 没有很好的效果， 而瓷片电容的等效串联电感很小， 所以利于吸收高频干扰， 将电解电容和瓷片电容并联接地， 能够更加有效地对电源进行滤波； 三个接地 电容中有两个容值相同的电解电容， 且并联接地， 能够有效减小等效电感。  [0028] In the present application, three grounding capacitors are used for power supply filtering, and the power supply is stable. The three grounding capacitors before the output of the power circuit have both electrolytic capacitors and ceramic capacitors; due to the structural characteristics of the electrolytic capacitors, the capacity is large. The equivalent series inductance is large, which has good absorption and suppression for low frequency interference, but has no good effect on high frequency interference, and the equivalent series inductance of ceramic capacitor is small, so it is good to absorb high frequency interference. The electrolytic capacitor and the ceramic capacitor are grounded in parallel, which can filter the power supply more effectively. There are two electrolytic capacitors with the same capacitance value in the three grounding capacitors, and the grounding in parallel can effectively reduce the equivalent inductance.
[0029] 由于本申请， 还包括一个稳压集成电路， 电源电路输出端 OUT与稳压集成电路 连接， 稳压集成电路进行电源输出， 从而进一步提高了供电电源的稳定性。  [0029] Since the present application further includes a voltage stabilizing integrated circuit, the output terminal OUT of the power circuit is connected to the voltage stabilizing integrated circuit, and the voltage stabilizing integrated circuit performs power output, thereby further improving the stability of the power supply.
[0030] 进一步地， 所述的稳压集成电路包括 TAR5S50。  [0030] Further, the voltage stabilization integrated circuit includes a TAR5S50.
[0031] 如图 2所示， TAR5S50中， 1脚为控制脚， 2脚为接地脚, 3脚为噪声抑制脚， 4脚 为输出脚， 5脚为输入脚； TAR5S50的输入脚与电源电路输出端 OUT连接； 且输 入脚与电源电路输出端之间连接有一个 l F接地电容； 输出脚进行电源输出， 且 输出脚与稳压集成电路的输出端之间还连接有接地的 1(VF电容； 噪声抑制脚通 过 O.Ol F的噪声抑制电容接地， 接地脚直接接地， 一般情况下， 控制脚与输入脚 连接在一起。  [0031] As shown in FIG. 2, in the TAR5S50, 1 pin is the control pin, 2 pin is the ground pin, 3 pin is the noise suppression pin, 4 pin is the output pin, 5 pin is the input pin; TAR5S50 input pin and power supply circuit The output terminal OUT is connected; and an input voltage is connected between the input pin and the power circuit output terminal; the output pin is used for power output, and a grounded 1 (VF) is connected between the output pin and the output end of the voltage stabilization integrated circuit. Capacitor; The noise suppression pin is grounded through the noise suppression capacitor of O.Ol F, and the grounding pin is directly grounded. In general, the control pin is connected to the input pin.

Claims

权利要求书 Claim
一种用于 LED调光板的电源电路， 其特征在于： 包括电源芯片 UP， 电源芯片 UP的电压输入脚 IN连接到第一公共点、 电源芯片 UP的使能 脚 EN通过第一电阻 R1连接到第一公共点， 第一公共点与工作电源连 接； 电源芯片 UP的接地脚 GND接地； 电源芯片 UP的补偿脚 COMP依 次通过第三电容 C3和第六电阻 R6接地； 电源芯片的反馈脚 FB依次通 过第二公共点、 第三公共点和第五电阻 R5接地； 电源芯片 UP的幵关 电源输出脚 SW与电感 L1的第一端连接、 电感 L1的第二端分别与电源 电路输出端和第二电阻 R2—端连接； 电源芯片 UP的升压脚 BS通过第 七电容 C7连接到幵关电源输出脚 SW与电感 L1第一端之间； 第二电阻 R2的另一端连接到第四公共点； 第四公共点通过第三电阻 R3与第二 公共点连接， 第四公共点通过第四电阻 R4与第三公共点连接； 电感 L 1的第二端和电源电路输出端之间设置有三个并联的接地电容。 A power supply circuit for an LED dimming plate, comprising: a power supply chip UP, a voltage input pin IN of the power supply chip UP is connected to the first common point, and an enable pin EN of the power supply chip UP is connected through the first resistor R1 To the first common point, the first common point is connected to the working power supply; the grounding pin GND of the power chip UP is grounded; the compensation pin COMP of the power chip UP is grounded through the third capacitor C3 and the sixth resistor R6 in sequence; the feedback pin FB of the power chip The second common point, the third common point, and the fifth resistor R5 are sequentially grounded; the power supply output pin SW of the power chip UP is connected to the first end of the inductor L1, and the second end of the inductor L1 is respectively connected to the power circuit output end. The second resistor R2 is connected to the end; the boosting pin BS of the power chip UP is connected between the bypass power output pin SW and the first end of the inductor L1 through the seventh capacitor C7; the other end of the second resistor R2 is connected to the fourth common a fourth common point is connected to the second common point through the third resistor R3, and the fourth common point is connected to the third common point through the fourth resistor R4; the second end of the inductor L1 and the power source Provided with three parallel between the output terminal of the capacitance to ground.
根据权利要求 1所述的一种用于 LED调光板的电源电路， 其特征在于 ： 所述的第一公共点上还连接有接地的第一电容 Cl。 The power supply circuit for an LED dimming plate according to claim 1, wherein: the first common point is further connected with a grounded first capacitor Cl.
根据权利要求 1所述的一种用于 LED调光板的电源电路， 其特征在于 ： 所述的电源芯片 UP采用 MP2403。 A power supply circuit for an LED dimming plate according to claim 1, wherein: said power supply chip UP adopts MP2403.
根据权利要求 1所述的一种用于 LED调光板的电源电路， 其特征在于 ： 所述的电源芯片 UP的软启动控制脚 SS通过第二电容 C2接地。 A power supply circuit for an LED dimming plate according to claim 1, wherein: the soft start control pin SS of the power chip UP is grounded through the second capacitor C2.
根据权利要求 1所述的一种用于 LED调光板的电源电路， 其特征在于 ： 所述的三个接地电容包括第四电容 C4、 第五电容 C5和第六电容 C6 ； 所述的第四电容 C4和第五电容 C5为容值相同的电解电容； 第六电 容 C6为瓷片电容。 A power supply circuit for an LED dimming plate according to claim 1, wherein: said three grounding capacitors comprise a fourth capacitor C4, a fifth capacitor C5 and a sixth capacitor C6; The fourth capacitor C4 and the fifth capacitor C5 are electrolytic capacitors having the same capacitance; the sixth capacitor C6 is a ceramic capacitor.
根据权利要求 1所述的一种用于 LED调光板的电源电路， 其特征在于 ： 还包括一个稳压集成电路， 电源电路输出端与稳压集成电路连接， 稳压集成电路进行电源输出。 A power supply circuit for an LED dimming panel according to claim 1, further comprising: a voltage stabilizing integrated circuit, wherein the output end of the power circuit is connected to the voltage stabilizing integrated circuit, and the voltage stabilizing integrated circuit performs power output.
根据权利要求 1所述的一种用于 LED调光板的电源电路， 其特征在于 ： 所述的稳压集成电路包括 TAR5S50。 A power supply circuit for an LED dimming panel according to claim 1, wherein: said voltage stabilizing integrated circuit comprises a TAR5S50.
PCT/CN2016/084149 2016-04-20 2016-05-31 Power circuit for led light adjusting plate WO2017181493A1 (en)

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