CN216930367U

CN216930367U - LED constant current driving circuit applied to fire-fighting emergency lighting lamp

Info

Publication number: CN216930367U
Application number: CN202220346569.3U
Authority: CN
Inventors: 侯庆; 黎嘉雯; 寇波
Original assignee: Guangdong Zhihe'an Lighting Technology Co ltd
Current assignee: Guangdong Zhihe'an Lighting Technology Co ltd
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-07-08
Anticipated expiration: 2032-02-21

Abstract

The utility model relates to the technical field of fire-fighting emergency lamps, and particularly discloses an LED constant-current driving circuit applied to a fire-fighting emergency illuminating lamp. According to the utility model, the single chip microcomputer is used for driving the LED constant current control of the fire emergency marker lamp in a PWM mode through the single chip microcomputer by arranging the single chip microcomputer main control circuit, the power supply management circuit and the PWM constant current driving circuit, so that the traditional LED constant current controller is replaced, the whole circuit structure is simpler, the used electronic elements are fewer, the occupied area of a PCB (printed circuit board) is smaller, the production cost is lower, and the LED constant current control circuit has a great advantage for manufacturing small lamp products.

Description

LED constant current driving circuit applied to fire-fighting emergency lighting lamp

Technical Field

The utility model relates to the technical field of fire-fighting emergency lamps, in particular to an LED constant-current driving circuit applied to a fire-fighting emergency illuminating lamp.

Background

The fire-fighting emergency lamp comprises a fire-fighting emergency illuminating lamp and a fire-fighting emergency evacuation marker lamp. Wherein fire control emergency lighting lamp installs in fire control escape way department usually, can turn on the light automatically and realize emergency lighting function when taking place disaster conditions such as power failure, fire control and fire alarm. The main functional units of the fire-fighting emergency illuminating lamp comprise a light source, a voltage transformation circuit, a constant current driving circuit, an automatic emergency switching circuit, a fault detection circuit, a fault display circuit, a protection circuit and the like. The LED constant current driving part circuit of the existing fire-fighting emergency illuminating lamp depends on an LED constant current controller, and the mode has the defects of high cost, more electronic elements and large occupied PCB area, and is relatively inferior to the manufacture of miniaturized lamp products.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the LED constant current driving circuit applied to the fire-fighting emergency illuminating lamp is provided, the LED constant current control of the fire-fighting emergency marker lamp driven by the singlechip in the PWM mode is realized by arranging the singlechip main control circuit, the power supply management circuit and the PWM constant current driving circuit, so that the traditional LED constant current controller is replaced, the whole circuit structure is simpler, the used electronic elements are fewer, the occupied area of a PCB (printed circuit board) is smaller, the production cost is lower, and the LED constant current driving circuit has great advantages for manufacturing small lamp products.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the LED constant-current driving circuit comprises a single chip microcomputer main control circuit, a PWM constant-current driving circuit, a light source fault detection circuit, a switch line circuit and a power management circuit, wherein the power management circuit is electrically connected with the single chip microcomputer main control circuit, the PWM constant-current driving circuit, the light source fault detection circuit and the switch line circuit respectively, and the PWM constant-current driving circuit, the light source fault detection circuit and the switch line circuit are electrically connected with the single chip microcomputer main control circuit.

Preferably, the single chip microcomputer master control circuit comprises a single chip microcomputer chip U1, a resistor R15, a light emitting tube LEDG1, a resistor R22 and a capacitor C18, and the resistor R15, the light emitting tube LEDG1, the resistor R22 and the capacitor C18 are all connected with the single chip microcomputer chip U1.

Preferably, the PWM constant current driving circuit includes a resistor R16, a resistor R17, a resistor R18, a resistor R20, a resistor R24, a resistor R25, a resistor R27, a resistor R28, a transistor Q4, a transistor Q5, a transistor Q6, a transistor Q7, an inductor L1, a capacitor C9, a capacitor C13, a diode D3, a regulator D4, a diode D8, an interface CN2, and an interface CN3, wherein one end of the resistor R17, a collector of the transistor Q5, and a cathode of the regulator D4 are all connected to a drain of the transistor Q4, a source of the transistor Q4 and one end of the inductor L1 are all connected to a cathode of the diode D1, a gate of the transistor Q1, an anode of the diode D1, and an emitter of the transistor Q1 are all connected to an emitter of the transistor Q1, a base of the resistor R1, a base of the transistor Q1, and a collector of the transistor Q1 are all connected to a pin of the first transistor 1, and a first resistor R1 of the single chip 1, the other end of the resistor R28 is connected with a base electrode of a triode Q6, an emitter of the triode Q6 is grounded through a resistor R16, the other end of the inductor L1, one end of the resistor R27, one end of the resistor R20 and one end of the capacitor C13 are all connected with a first pin of an interface CN2, the other end of the resistor R27 is connected with a cathode of a diode D8, a second pin of the interface CN2 and the other end of the resistor R20 are all connected with a first pin of the interface CN3, the other end of the capacitor C13, one end of the resistor R18, one end of the resistor R24 and one end of the resistor R25 are all connected with a second pin of an interface CN3, the other end of the resistor R25 and one end of the capacitor C9 are all connected with a third pin of the singlechip chip U1, and an anode of the diode D3, the other end of the capacitor C9, the other end of the resistor R18 and the other end of the resistor R24 are all grounded.

Preferably, the light source fault detection circuit comprises a resistor R14, a resistor R19 and a capacitor C8, one end of the resistor R14, one end of the resistor R19 and one end of the capacitor C8 are all connected with a fifth pin of the single chip microcomputer chip U1, the other end of the resistor R14 is connected with a first pin of the interface CN2, and the other end of the resistor R19 and the other end of the capacitor C8 are all grounded.

Preferably, the switch line circuit includes a switch line interface CN4 and a resistor R21, one end of the resistor R21 is connected to a first pin of the switch line interface CN4, and the other end of the resistor R21 is connected to a seventh pin of the single chip microcomputer chip U1.

Preferably, the power management circuit includes a power interface CN1, a rectifier bridge DB1, a diode D1, a resistor R1 and a resistor R1, a third pin of the power interface CN1 is connected to a fourth pin of the rectifier bridge DB1 through a fuse F1, a second pin of the power interface CN1 is connected to a third pin of the rectifier bridge DB1, a first pin of the power interface CN1 is connected to a base of a transistor Q1 through a diode D1, a regulator D1 and a resistor R1 in sequence, the base of the transistor Q1 is grounded through a capacitor C1 and a resistor R1, a first pin of the rectifier bridge DB1 is connected to the base of the transistor Q1 through a resistor R1, an emitter of the transistor Q1 is connected to the eighth pin of the triode U4, the base of the transistor Q1 is grounded through a resistor C1 and a capacitor R1, and a first pin of the rectifier bridge CN1 and a resistor R1 in sequence, the base electrode of the triode Q2 is connected with the ninth pin of the single chip microcomputer chip U1 through a resistor R5, the cathode of the diode D1 is connected with the base electrode of the triode Q3 through a resistor R6, the collector electrode of the triode Q3 is connected with the cathode of the diode D1 through a resistor R2, the base electrode of the triode Q3 is grounded through a voltage regulator tube D2, the emitter electrode of the triode Q3 is grounded through a capacitor C6, one end of the resistor R23 is connected with the cathode of the diode D1, the other end of the resistor R23 and one end of the resistor R30 are both connected with the collector electrode of the triode Q9, the other end of the resistor R30 and the cathode of the voltage regulator tube D5 are both connected with the base electrode of the triode Q9, and the emitter electrode of the triode Q9 is grounded through a capacitor C12.

By adopting the technical scheme, the LED constant current driving circuit applied to the fire-fighting emergency illuminating lamp provided by the utility model has the following beneficial effects: the power management circuit in the LED constant current driving circuit is respectively electrically connected with the singlechip main control circuit, the PWM constant current driving circuit, the light source fault detection circuit and the switch line circuit are all electrically connected with the singlechip main control circuit, the LED constant current control of the fire-fighting emergency marker lamp driven by the singlechip in a PWM mode is realized, the traditional LED constant current controller is replaced, the whole circuit structure is simple, used electronic elements are few, the occupied area of a PCB circuit board is small, the production cost is low, the LED constant current driving circuit has great advantages for being small-sized lamp products, and the market competitiveness is improved.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, and is not intended to limit the present invention. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

As shown in fig. 1, in the circuit schematic diagram of the present invention, the LED constant current driving circuit applied to the fire emergency lighting lamp includes a single chip microcomputer main control circuit, a PWM constant current driving circuit, a light source fault detecting circuit, a switch line circuit and a power management circuit, the power management circuit is electrically connected to the single chip microcomputer main control circuit, the PWM constant current driving circuit, the light source fault detecting circuit and the switch line circuit, and the PWM constant current driving circuit, the light source fault detecting circuit and the switch line circuit are electrically connected to the single chip microcomputer main control circuit. The power management circuit is used for connecting an external power supply and outputting a stable working power supply to the fire-fighting emergency illuminating lamp, and the singlechip main control circuit is used for centrally controlling the working states of the PWM constant-current driving circuit, the light source fault detection circuit, the switch line circuit and the power management circuit; the LED constant current driving circuit can be integrated on a PCB circuit board and can be applied to a fire-fighting emergency illuminating lamp to realize constant current driving control on the fire-fighting emergency illuminating lamp LED, namely, the traditional LED constant current controller is replaced by an MCU PWM control method, so that the manufacturing cost of the lamp is reduced, and the manufacturing cost is lower.

Specifically, the single-chip microcomputer main control circuit comprises a single-chip microcomputer chip U1, a resistor R15, a light emitting tube LEDG1, a resistor R22 and a capacitor C18, wherein the resistor R15, the light emitting tube LEDG1, the resistor R22 and the capacitor C18 are all connected with the single-chip microcomputer chip U1; the PWM constant-current driving circuit comprises a resistor R16, a resistor R17, a resistor R18, a resistor R20, a resistor R24, a resistor R25, a resistor R27, a resistor R28, a transistor Q4, a triode Q5, a triode Q6, a triode Q7, an inductor L1, a capacitor C9, a capacitor C13, a diode D3, a voltage regulator D4, a diode D8, an interface CN2 and an interface CN3, wherein one end of the resistor R17, a collector of the triode Q5 and a cathode of the voltage regulator D4 are all connected with a drain electrode of the transistor Q4, a source electrode of the transistor Q4 and one end of the inductor L1 are all connected with a cathode electrode of the diode D1, a grid electrode of the transistor Q1, an anode of the voltage regulator D1 and an emitter of the triode Q1 are all connected with an emitter electrode of the triode Q1, the other end of the base electrode of the resistor R1, the base electrode of the triode Q1 and a collector of the Q1 are all connected with a pin of the first single chip 1, the other end of the resistor R28 is connected with a base electrode of a triode Q6, an emitter electrode of the triode Q6 is grounded through a resistor R16, the other end of the inductor L1, one end of a resistor R27, one end of a resistor R20 and one end of a capacitor C13 are all connected with a first pin of an interface CN2, the other end of the resistor R27 is connected with a cathode of a diode D8, a second pin of the interface CN2 and the other end of a resistor R20 are all connected with a first pin of the interface CN3, the other end of the capacitor C13, one end of a resistor R18, one end of a resistor R24 and one end of a resistor R25 are all connected with a second pin of an interface CN3, the other end of the resistor R25 and one end of the capacitor C9 are all connected with a third pin of the singlechip chip U1, and an anode of the diode D3, the other end of the capacitor C9, the other end of the resistor R18 and the other end of the resistor R24 are all grounded; the light source fault detection circuit comprises a resistor R14, a resistor R19 and a capacitor C8, wherein one end of the resistor R14, one end of the resistor R19 and one end of the capacitor C8 are connected with a fifth pin of the single chip microcomputer chip U1, the other end of the resistor R14 is connected with a first pin of an interface CN2, and the other end of the resistor R19 and the other end of the capacitor C8 are grounded; the switch line circuit comprises a switch line interface CN4 and a resistor R21, wherein one end of the resistor R21 is connected with a first pin of the switch line interface CN4, and the other end of the resistor R21 is connected with a seventh pin of the single chip microcomputer chip U1; the power management circuit comprises a power interface CN1, a rectifier bridge DB1, a diode D1, a resistor R1 and a resistor R1, wherein a third pin of the power interface CN1 is connected with a fourth pin of the rectifier bridge DB1 through a fuse F1, a second pin of the power interface CN1 is connected with a third pin of the rectifier bridge DB1, a first pin of the power interface CN1 is connected with a base of a triode Q1 through a diode D1, a voltage regulator D1 and a resistor R1 in sequence, a base of the triode Q1 is grounded through a capacitor C1 and a resistor R1, a first pin of the rectifier bridge DB1 is connected with a base of a triode Q1 through a resistor R1, an emitter of the triode Q1 is connected with an eighth pin of the singlechip U1, a base of the triode Q1 is grounded through a resistor C1 and a capacitor C1, a first pin of the rectifier bridge CN1 is connected with a base of the triode Q1, a first pin of the power interface CN1 and a resistor R1 are connected with a ground, the base of the triode Q2 is connected with the ninth pin of the singlechip chip U1 through a resistor R5, the cathode of the diode D1 is connected with the base of a triode Q3 through a resistor R6, the collector of the triode Q3 is connected with the cathode of the diode D1 through a resistor R2, the base of the triode Q3 is grounded through a voltage regulator D2, the emitter of the triode Q3 is grounded through a capacitor C6, one end of the resistor R23 is connected with the cathode of the diode D1, the other end of the resistor R23 and one end of the resistor R30 are both connected with the collector of the triode Q9, the other end of the resistor R30 and the cathode of the voltage regulator D5 are both connected with the base of the triode Q9, and the emitter of the triode Q9 is grounded through a capacitor C12. It can be understood that the single chip microcomputer chip U1 may be an STM32 single chip microcomputer chip or the like, wherein an SI pin is used for data reception, and an SO pin is used for data transmission; light _ ch is a light source fault detection point in a light-out state, and pirA is a switch line.

The LED constant current controller has the advantages that the design is reasonable, the structure is unique, the LED constant current control of the fire-fighting emergency marker lamp driven by the single chip microcomputer in a PWM mode is realized, the traditional LED constant current controller is replaced, the whole circuit structure is simple, used electronic elements are few, the occupied area of a PCB is small, the production cost is low, the LED constant current controller has great advantages for manufacturing small-sized lamp products, and the market competitiveness is improved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, and the scope of protection is still within the scope of the utility model.

Claims

1. The utility model provides a be applied to fire control emergency lighting's LED constant current drive circuit which characterized in that: the LED lamp comprises a single chip microcomputer main control circuit, a PWM constant current driving circuit, a light source fault detection circuit, a switch line circuit and a power management circuit, wherein the power management circuit is electrically connected with the single chip microcomputer main control circuit, the PWM constant current driving circuit, the light source fault detection circuit and the switch line circuit respectively, and the PWM constant current driving circuit, the light source fault detection circuit and the switch line circuit are electrically connected with the single chip microcomputer main control circuit.

2. The LED constant-current driving circuit applied to the fire-fighting emergency illuminating lamp according to claim 1, characterized in that: the single-chip microcomputer main control circuit comprises a single-chip microcomputer chip U1, a resistor R15, a light emitting tube LEDG1, a resistor R22 and a capacitor C18, wherein the resistor R15, the light emitting tube LEDG1, the resistor R22 and the capacitor C18 are all connected with the single-chip microcomputer chip U1.

3. The LED constant-current driving circuit applied to the fire-fighting emergency illuminating lamp according to claim 2, characterized in that: the PWM constant-current driving circuit comprises a resistor R16, a resistor R17, a resistor R18, a resistor R20, a resistor R24, a resistor R25, a resistor R27, a resistor R28, a transistor Q4, a triode Q5, a triode Q6, a triode Q7, an inductor L1, a capacitor C9, a capacitor C13, a diode D3, a voltage regulator D4, a diode D8, an interface CN2 and an interface CN3, wherein one end of the resistor R17, a collector of the triode Q5 and a cathode of the voltage regulator D4 are all connected with the drain of the transistor Q4, a source of the transistor Q4 and one end of the inductor L1 are all connected with the cathode of the diode D1, a grid of the transistor Q1, an anode of the voltage regulator D1 and an emitter of the triode Q1 are all connected with the emitter of the triode Q1, the other end of the resistor R1, a base of the triode Q1 and a base of the Q1 are all connected with a collector of the first pin of the singlechip U1, the other end of the resistor R28 is connected with a base electrode of a triode Q6, an emitter of the triode Q6 is grounded through a resistor R16, the other end of the inductor L1, one end of the resistor R27, one end of the resistor R20 and one end of the capacitor C13 are all connected with a first pin of an interface CN2, the other end of the resistor R27 is connected with a cathode of a diode D8, a second pin of the interface CN2 and the other end of the resistor R20 are all connected with a first pin of the interface CN3, the other end of the capacitor C13, one end of the resistor R18, one end of the resistor R24 and one end of the resistor R25 are all connected with a second pin of an interface CN3, the other end of the resistor R25 and one end of the capacitor C9 are all connected with a third pin of the singlechip chip U1, and an anode of the diode D3, the other end of the capacitor C9, the other end of the resistor R18 and the other end of the resistor R24 are all grounded.

4. The LED constant-current driving circuit applied to the fire-fighting emergency illuminating lamp according to claim 3, characterized in that: the light source fault detection circuit comprises a resistor R14, a resistor R19 and a capacitor C8, one end of the resistor R14, one end of the resistor R19 and one end of the capacitor C8 are all connected with a fifth pin of the single chip microcomputer chip U1, the other end of the resistor R14 is connected with a first pin of an interface CN2, and the other end of the resistor R19 and the other end of the capacitor C8 are all grounded.

5. The LED constant-current driving circuit applied to the fire-fighting emergency illuminating lamp according to claim 2, characterized in that: the switch line circuit comprises a switch line interface CN4 and a resistor R21, one end of the resistor R21 is connected with a first pin of the switch line interface CN4, and the other end of the resistor R21 is connected with a seventh pin of the single chip microcomputer chip U1.

6. The LED constant-current driving circuit applied to the fire-fighting emergency illuminating lamp according to claim 2, characterized in that: the power management circuit comprises a power interface CN1, a rectifier bridge DB1, a diode D1, a resistor R1 and a resistor R1, a third pin of the power interface CN1 is connected with a fourth pin of the rectifier bridge DB1 through a fuse F1, a second pin of the power interface CN1 is connected with a third pin of the rectifier bridge DB1, a first pin of the power interface CN1 is connected with a base of a triode Q1 through a diode D1, a voltage regulator D1 and a resistor R1 in sequence, the base of the triode Q1 is grounded through a capacitor C1 and a resistor R1, a first pin of the rectifier bridge DB1 is connected with the base of a triode Q1 through a resistor R1, an emitter of the triode Q1 is connected with an eighth pin of the singlechip U1, the base of the triode Q1 is grounded through a resistor C1 and a capacitor C1, and a first pin of the rectifier bridge CN1 are connected with the base of the triode Q1, a first pin of the power interface CN1 and a resistor R1 are connected with the ground, the base electrode of the triode Q2 is connected with the ninth pin of the single chip microcomputer chip U1 through a resistor R5, the cathode of the diode D1 is connected with the base electrode of the triode Q3 through a resistor R6, the collector electrode of the triode Q3 is connected with the cathode of the diode D1 through a resistor R2, the base electrode of the triode Q3 is grounded through a voltage regulator tube D2, the emitter electrode of the triode Q3 is grounded through a capacitor C6, one end of the resistor R23 is connected with the cathode of the diode D1, the other end of the resistor R23 and one end of the resistor R30 are both connected with the collector electrode of the triode Q9, the other end of the resistor R30 and the cathode of the voltage regulator tube D5 are both connected with the base electrode of the triode Q9, and the emitter electrode of the triode Q9 is grounded through a capacitor C12.