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Dimming power supply module for voltage-stabilized power supply and LED dimming device

A technology of dimming power supply and dimming circuit, which is applied in the field of electronics

Active Publication Date: 2021-05-14
SHENZHEN ANGUI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above technical problems, the embodiment of the present invention provides a dimming power supply module and LED dimming device with regulated power supply to solve the problem that the existing LED power supply module cannot provide stable power supply to the single-chip microcomputer

Method used

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  • Dimming power supply module for voltage-stabilized power supply and LED dimming device
  • Dimming power supply module for voltage-stabilized power supply and LED dimming device
  • Dimming power supply module for voltage-stabilized power supply and LED dimming device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In Example 1, please refer to image 3 , the control circuit 110 is composed of APFC (active power factor correction) and flyback separation form, because the control circuit 110 outputs the flyback as constant current control, has no constant voltage function, and cannot output constant voltage and stable voltage. Embodiment 1 By setting the voltage stabilizing circuit 120 to use the voltage on the second winding T1B of the transformer in the control circuit 110 to perform voltage conversion and voltage stabilizing, so as to stably supply power to the first single-chip microcomputer in the dimming circuit 130 .

[0042] The voltage stabilizing circuit 120 includes a first diode D1, a second diode D2, a first capacitor C1, a second capacitor C2, a first transistor Q1, a second transistor Q2, a first resistor R1, The second resistor R2, the first voltage regulator tube ZDS1 and the second voltage regulator tube ZDS2; the anode of the first diode D1 is connected to the ca...

Embodiment 2

[0054] In the second embodiment, the circuit and working principle of the control circuit are the same as those of the control circuit 110 in the first embodiment, as figure 2 As shown; the circuit and working principle of the dimming circuit in the second embodiment are the same as that of the dimming circuit 130 in the first embodiment, as Figure 4 shown.

[0055] Embodiment 2 mainly improves the voltage stabilizing circuit, such as Figure 5 As shown, the voltage stabilizing circuit in the second embodiment includes a third diode D3, a seventh capacitor C7, an eighth capacitor C8, a fifth triode Q5, a sixth triode Q6, a fourteenth resistor R14, a Fifteen resistors R15, the fourth voltage regulator tube ZDS4 and the fifth voltage regulator tube ZDS5; the anode of the third diode D3 is connected to the fifth foot of the transformer (that is, the terminal with the same name of the second winding T1B of the transformer); the third The cathode of the diode D3 is connected to...

Embodiment 3

[0060] In the third embodiment, the control circuit can be replaced by Image 6 The shown APFC (active power factor correction) + BUCK (step-down circuit topology) circuit uses the characteristics of APFC output constant voltage to stably supply power to the first single-chip microcomputer that requires constant voltage output; it is based on the second embodiment The difference between the modification and the second embodiment is that the first winding T1A of the transformer and its peripheral circuits are different (such as Image 6 As shown in the dotted line box in the middle, the third pin and the fourth pin of the transformer are not used in the third embodiment, so they are not shown in the figure), specifically as Image 6 As shown, other circuit structures are the same (the name of each device in the same part is the same as that of Embodiment 2, indicating that it is the same device), this is the prior art, and its circuit connection will not be described in detail ...

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PUM

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Abstract

The embodiment of the invention discloses a dimming power supply module for voltage-stabilized power supply and an LED dimming device. The dimming power supply module for voltage-stabilized power supply comprises a control circuit, a voltage stabilizing circuit, a dimming circuit and an output port; the control circuit converts commercial power into power supply voltage and outputs the power supply voltage to an LED lamp string for power supply through the output port; the voltage stabilizing circuit senses the voltage inside the control circuit and generates a first voltage and a second voltage, the second voltage is output to a single chip microcomputer in the dimming circuit for power supply after being subjected to voltage stabilization processing, and the first voltage is output to set the voltage regulating range of the dimming circuit; the output port transmits a dimming signal output by a dimmer to the dimming circuit, and the dimming circuit generates a corresponding pulse width modulation signal according to the dimming signal; and the control circuit controls the magnitude of the power supply current according to the pulse width modulation signal, and outputs the power supply current through the output port so as to carry out dimming on the LED lamp string. And stable second voltage can be output to supply power to the single chip microcomputer, and 0-10V dimming can be realized according to the first voltage.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a dimming power supply module and an LED dimming device for power supply with stable voltage. Background technique [0002] At present, there are three common schemes for LED power modules. The first one is AC to DC circuit (AC-DC, using constant voltage chip) plus single-chip microcomputer or DC to DC circuit (DC-DC, using constant current dimming chip). The second is AC to DC (AC-DC, using constant current chip) plus anti-flicker chip and should be converted dimming circuit, the third is AC to DC (AC-DC, using constant current chip) plus application Putting the switching dimming circuit, the single chip microcomputer should be used in the switching dimming circuit to control. [0003] These methods use more chips and relatively more components, which will increase the cost, resulting in a larger size of the power module, which is not conducive to the development of miniatu...

Claims

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Application Information

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IPC IPC(8): H05B45/325H05B45/10H05B45/34
CPCH05B45/325H05B45/10H05B45/34H05B45/375H05B45/385H05B45/392
Inventor 方继发
Owner SHENZHEN ANGUI TECH CO LTD