CN223978783U - Self-adaptive dual-power LED lamp - Google Patents

Abstract

The utility model belongs to the technical field related to LED circuits, and particularly relates to a self-adaptive dual-power LED lamp which comprises a power module, a rectifying unit, a filter capacitor, an LED power chip, an LED lamp string, a first resistor, a second resistor and a switching tube, wherein a pin 1 of the LED power chip is connected with an inductor and the LED lamp string, pins 2 and 3 of the LED power chip are connected with the rectifying unit to the anode and the cathode of the power module, the pins 2 and 3 of the LED power chip are also connected with the filter capacitor, the switching tube comprises a first triode and a second triode, and a base electrode of the first triode is connected with one end of the first resistor and one end of the second resistor. The self-adaptive dual-power LED lamp circuit can not turn off the LED lamp due to instant power failure after AC/DC conversion, can ensure that the lamp is lightened and illuminated when the DC power supply is connected at low voltage, and the voltage conversion does not influence the use of the lamp, thereby bringing convenience to the use of people and meeting the market demand.

Description

Self-adaptive dual-power LED lamp

Technical Field

The utility model belongs to the technical field of LED circuits, and particularly relates to a self-adaptive dual-power LED lamp.

Background

LED lighting products have been used in daily life today with rapid development of LEDs. Compared with the traditional light source, the white light LED light source has the advantages of long service life, difficult damage of solid illumination, high light efficiency, no mercury, environmental protection, earthquake resistance and the like, and becomes a third-generation light source in the future, and brings about another revolution in the illumination field.

The existing LED lamp installed and used is only suitable for 220V voltage, and when a fire disaster or flood disaster or an indoor circuit fails, the LED lamp for general illumination is powered off, so that indoor illumination is extinguished, confusion is easy to occur, and the defect of the LED lamp for general illumination is to be solved.

Therefore, the double-purpose lamp with the functions of illumination and emergency is in line with market demands, the lamp can be suitable for direct-current low voltage, the problem can be solved, and the lamp can also integrate an original illumination circuit and an emergency circuit.

Disclosure of utility model

To solve the problems set forth in the background art. The self-adaptive dual-power LED lamp provided by the utility model has the advantages that the LED lamp is not extinguished due to instant power failure after the AC/DC conversion, the lighting of the lamp can be ensured when the DC power is connected at low voltage, the lamp is not influenced by the voltage conversion, the use of the lamp is facilitated for people, and the market demand is met.

In order to achieve the aim, the utility model provides the technical scheme that the self-adaptive double-power-supply LED lamp comprises a power module, a rectifying unit, a filter capacitor, an LED power supply chip, an LED lamp string, a first resistor, a second resistor and a switch tube, wherein a pin 1 of the LED power supply chip is connected with an inductor and the LED lamp string, and pins 2 and 3 of the LED power supply chip are connected with the rectifying unit to the anode and the cathode of the power module;

The LED light string includes a plurality of first LED lights, second LED lights, and an N LED light;

The switch tube comprises a first triode and a second triode, wherein the base electrode of the first triode is connected with one end of a first resistor and one end of a second resistor, the other end of the first resistor is connected with the anode of a power module, the other end of the second resistor is connected with the cathode of the power module, the emitting electrode of the first triode is connected with the cathode of the power module, the collecting electrode of the first triode is connected with the base electrode of the second triode, the base electrode of the second triode is connected with the anode of a third resistor to a first LED lamp, the collecting electrode of the second triode is connected with the cathode of the first LED lamp, and the emitting electrode of the second triode is connected with the cathode of the power module.

Preferably, the power supply module comprises an alternating current power supply and a direct current power supply, wherein the alternating current power supply is 220V, and the direct current power supply is 12V.

Preferably, the rectifying unit is a rectifying circuit formed by a first diode, a second diode, a third diode and a fourth diode, and is used for converting the voltage output by the power supply into a rectified driving voltage.

As a preferable scheme, the first triode and the second triode adopt NPN triodes, and the base electrode of each NPN triode is the control end of the switch tube.

Preferably, the pin 4 of the LED power chip connects the fourth resistor to the negative electrode of the power module.

Preferably, the model of the LED power supply chip is RD627.

Compared with the prior art, the utility model has the beneficial effects that:

When the input alternating current is converted into the rectified driving voltage through the rectifying unit, the first triode is driven to be conducted through voltage division of the first resistor and the second resistor, the current entering the base electrode of the second triode Q2 in a bypass mode, the second triode Q2 is controlled to be not conducted, and the LED power chip is used for driving and controlling the high-voltage lamp string to work.

When the input is low-voltage direct current, the first triode is driven to be conducted by insufficient voltage division of the first resistor and the second resistor, the current enters the base electrode of the second triode from the third resistor, the second triode is controlled to be conducted, and the current flows through the first LED lamp and the second triode from the positive electrode of the direct current power supply to return to the negative electrode of the direct current power supply, so that the first LED lamp is powered by the direct current power supply to be lighted, and the LED lamp can be lightened under the low voltage.

The self-adaptive dual-power LED lamp circuit can not turn off the LED lamp due to instant power failure after AC/DC conversion, can ensure that the lamp is lightened and illuminated when the DC power supply is connected at low voltage, and the voltage conversion does not influence the use of the lamp, thereby bringing convenience to the use of people and meeting the market demand.

Drawings

FIG. 1 is a circuit diagram of a dual power input circuit of the present utility model;

fig. 2 is a circuit configuration diagram of the present utility model at the time of dual power input.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

Referring to fig. 1-2, the utility model provides a self-adaptive dual-power LED lamp, which comprises a power module, a rectifying unit, a filter capacitor C1, an LED power chip IC1, an LED lamp string, a first resistor R1, a second resistor R2 and a switch tube, wherein a pin 1 of the LED power chip IC1 is connected with an inductor L1 and the LED lamp string, and pins 2 and 3 of the LED power chip IC1 are connected with the rectifying unit to the positive and negative electrodes of the power module;

The LED light string includes a plurality of first LED lamps LED1, second LED lamps LED2, N.

The switch tube comprises a first triode Q1 and a second triode Q2, wherein the base electrode of the first triode Q1 is connected with one end of a first resistor R1 and one end of a second resistor R2, the other end of the first resistor R1 is connected with the anode of a power module, the other end of the second resistor R2 is connected with the cathode of the power module, the emitting electrode of the first triode Q1 is connected with the cathode of the power module, the collecting electrode of the first triode Q1 is connected with the base electrode of the second triode Q2, the base electrode of the second triode Q2 is connected with the anode of a third resistor R3 to a first LED lamp LED1, the collecting electrode of the second triode Q2 is connected with the cathode of the first LED lamp LED1, and the emitting electrode of the second triode Q2 is connected with the cathode of the power module.

Specifically, the power supply module comprises an alternating current power supply AC and a direct current power supply DC, wherein the alternating current power supply AC is 220V, and the direct current power supply DC is 12V.

Specifically, the rectifying unit is a rectifying circuit formed by a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4, and is configured to convert a voltage output by the power supply into a rectified driving voltage.

Specifically, the first triode Q1 and the second triode Q2 adopt NPN type triodes, and the base electrode of the NPN type triodes is the control end of the switching tube.

Specifically, the pin 4 of the LED power chip IC1 connects the fourth resistor R4 to the negative electrode of the power module.

Specifically, the model of the LED power chip IC1 is RD627.

When the LED power supply is used, when an input power supply is AC (such as AC 220V), an alternating current power supply AC converts the voltage output by the power supply into rectified driving voltage through a rectifying circuit in a rectifying unit, and the rectified driving voltage is divided by a first resistor R1 and a second resistor R2 to drive a first triode Q1 due to higher AC power supply voltage, a base electrode of the first triode Q1 is conducted by the driving voltage, and current which bypasses the base electrode of a second triode Q2 is controlled to be non-conducted through the second triode Q2, so that the LED power supply chip IC1 is kept to drive and control an LED1, an LED2 and an LED n to form a high-voltage lamp string to work, and the LED power supply chip IC1 is driven to be lighted.

When the input is a direct current power supply (such as DC 12V), the first resistor R1 and the second resistor R2 are not divided enough to drive the first triode Q1 to be conducted due to the low DC voltage of the direct current power supply, current enters the base electrode of the second triode Q2 from the third resistor R3, the conduction is controlled through the second triode Q2, the current flows from the DC positive electrode of the direct current power supply to the first diode D1, and then returns to the DC negative electrode of the direct current power supply through the first LED lamp LED1 and the second triode Q2, so that the first LED lamp LED1 is powered by the direct current power supply, the LED lamp can be lighted under the low voltage, the lighting of the lamp can be ensured under the condition that the lamp is powered down by the direct current power supply, the lamp is not influenced by the change of the voltage, and the market demand is met.

It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited thereto, but may be modified or substituted for some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (6)

1. The self-adaptive double-power-supply LED lamp is characterized by comprising a power supply module, a rectifying unit, a filter capacitor (C1), an LED power supply chip (IC 1), an LED lamp string, a first resistor (R1), a second resistor (R2) and a switch tube, wherein a pin 1 of the LED power supply chip (IC 1) is connected with an inductor (L1) and the LED lamp string, and pins 2 and 3 of the LED power supply chip (IC 1) are connected with the rectifying unit to the positive electrode and the negative electrode of the power supply module;

the LED light string includes a plurality of first LED lamps (LED 1), second LED lamps (LED 2) connected in series;

The switch tube comprises a first triode (Q1) and a second triode (Q2), wherein the base electrode of the first triode (Q1) is connected with one end of a first resistor (R1) and one end of a second resistor (R2), the other end of the first resistor (R1) is connected with the anode of a power module, the other end of the second resistor (R2) is connected with the cathode of the power module, the emitting electrode of the first triode (Q1) is connected with the cathode of the power module, the collecting electrode of the first triode (Q1) is connected with the base electrode of the second triode (Q2), the base electrode of the second triode (Q2) is connected with the anode of a third resistor (R3) to a first LED lamp (LED 1), and the collecting electrode of the second triode (Q2) is connected with the cathode of the first LED lamp (LED 1).

2. The adaptive dual-power LED lamp of claim 1, wherein the power module comprises an Alternating Current (AC) power source and a Direct Current (DC) power source, the AC power source is 220V, and the DC power source is 12V.

3. The adaptive dual-power LED lamp as set forth in claim 1, wherein the rectifying unit comprises a rectifying circuit consisting of a first diode (D1), a second diode (D2), a third diode (D3) and a fourth diode (D4) for converting a voltage outputted from the power supply into a rectified driving voltage.

4. The adaptive dual-power LED lamp as set forth in claim 1, wherein said first triode (Q1) and said second triode (Q2) are NPN type triodes, and a base electrode of said NPN type triodes is a control end of said switching tube.

5. The adaptive dual-power LED lamp as set forth in claim 1, wherein the pin 4 of the LED power chip (IC 1) connects the fourth resistor (R4) to the negative pole of the power module.

6. The adaptive dual-power LED lamp of claim 1, wherein the LED power chip (IC 1) is RD627.