CN209390430U - A kind of LED car lamp driving power - Google Patents
A kind of LED car lamp driving power Download PDFInfo
- Publication number
- CN209390430U CN209390430U CN201822120954.2U CN201822120954U CN209390430U CN 209390430 U CN209390430 U CN 209390430U CN 201822120954 U CN201822120954 U CN 201822120954U CN 209390430 U CN209390430 U CN 209390430U
- Authority
- CN
- China
- Prior art keywords
- semiconductor
- oxide
- metal
- control chip
- driving power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
This practical switch power technology field, especially a kind of LED car lamp driving power, including metal-oxide-semiconductor Q1, control chip U1, metal-oxide-semiconductor Q2, high-frequency inductor L1, sustained diode 1 and sampling resistor R1, R2, R3；The starting pin external voltage input terminal of the control chip U1, control chip U1, metal-oxide-semiconductor Q2, high-frequency inductor L1, sustained diode 1 and sampling resistor R1, R2, R3 form the buck converter of non-isolated constant current output；The ground terminal of driving power is arranged in metal-oxide-semiconductor Q1, wherein the source electrode of the drain electrode electric connection of power supply ground terminal of metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1 is electrically connected with the power pins of control chip U1, and the grid of metal-oxide-semiconductor Q1 is electrically connected with voltage input end；The output end of the voltage input end, ground terminal and buck converter is connected to inserting terminal.
Description
Technical field
This practical switch power technology field, especially a kind of LED car lamp driving power.
Background technique
With the gradually decline of the continuous development of LED manufacture technology and maturation and production cost, LED light source is answered extensively
For car light.It is crucial that the driving power of LED car lamp, existing LED car lamp driving power is often by direct current in LED car lamp design
It is output to LED module after voltage step-down, in order to improve the production efficiency, is easy to use, manufacturer is usually by the input of driving power
When exporting and ground terminal is designed as plug-in type port, but can be carried out test to the electrical property of driving power, testing staff is produced
When, has input terminal and ground terminal is reversed, is easy to cause driving power component damage.
Utility model content
The LED car lamp driving power with reverse connecting protection that the purpose of this utility model is to provide a kind of overcomes because of input
End and ground terminal it is reversed and the case where cause power supply to damage.
The technical solution of the utility model are as follows:
A kind of driving power for LED car lamp, including metal-oxide-semiconductor Q1, control chip U1, metal-oxide-semiconductor Q2, high-frequency inductor L1,
Sustained diode 1 and sampling resistor R1, R2, R3 in parallel each other；The starting pin external voltage input of the control chip U1
End, control chip U1, metal-oxide-semiconductor Q2, high-frequency inductor L1, sustained diode 1 and sampling resistor R1, R2, R3 form non-isolated constant current
The buck converter of output.
The ground terminal of driving power is arranged in metal-oxide-semiconductor Q1, wherein the drain electrode electric connection of power supply ground terminal of metal-oxide-semiconductor Q1, MOS
The source electrode of pipe Q1 is electrically connected with the power pins of control chip U1, and the grid of metal-oxide-semiconductor Q1 is electrically connected with voltage input end；The electricity
The output end of pressure input terminal, ground terminal and buck converter is connected to inserting terminal.
Preferably, control chip U1 is that KT5006 series controls chip U1, wherein the metal-oxide-semiconductor Q2 setting is controlling
The gate driving pin of chip U1, metal-oxide-semiconductor Q2 are electrically connected with high-frequency inductor L1, and sustained diode 1 is located at the side of high-frequency inductor L1
The cathode on road, sustained diode 1 is electrically connected with the starting pin of control chip U1, and the power pin of control chip U1 is connected to heat
Quick resistance R6.
Preferably, driving power further includes input inductance L2 and is sequentially connected with the divider resistance to form conductive loop
R1, electrolytic capacitor EC1 and diode D1；The starting pin electricity that the voltage input end passes through input inductance L2 and control chip U1
Connection, the grid of one end connection metal-oxide-semiconductor Q1 of the divider resistance R1, the source electrode of the cathode connection metal-oxide-semiconductor of electrolytic capacitor EC1.
The utility model has the beneficial effects that effectively solving production test or use by the setting anti-reverse structure of metal-oxide-semiconductor
Input terminal reversed the case where causing driving power to be damaged when LED car lamp driving power, structure is simple, is suitable for industrial production.
Detailed description of the invention
Fig. 1: the utility model principle schematic diagram.
Specific embodiment
To be more clear the objectives, technical solutions, and advantages of the embodiments of the present invention, below in conjunction with embodiment and
Attached drawing, the utility model will be further described.
Embodiment
A kind of driving power for LED car lamp, as shown in Figure 1, driving power include metal-oxide-semiconductor Q1, control chip U1,
Metal-oxide-semiconductor Q2, high-frequency inductor L1, sustained diode 1 and sampling resistor R1, R2, R3 in parallel each other；Control the starting of chip U1
Pin external voltage input terminal, control chip U1, metal-oxide-semiconductor Q2, high-frequency inductor L1, sustained diode 1 and sampling resistor R1, R2,
R3 forms the buck converter of non-isolated constant current output.
Wherein, control chip U1 is that KT5006 series controls chip U1, it is only necessary to which a small amount of peripheral component is able to achieve drop
Conversion function is pressed, the gate driving pin of control chip U1 is arranged in metal-oxide-semiconductor Q2, and metal-oxide-semiconductor Q2 is electrically connected with high-frequency inductor L1, continues
Stream diode D1 is located at the bypass of high-frequency inductor L1, and the starting pin of the cathode and control chip U1 of sustained diode 1 is electrically connected
It connects, it is contemplated that thermistor R6 is arranged in the power pin of control chip U1 in the nonlinear wind vibration of LED, defeated for finely tuning
Power out.
The utility model has the anti-power supply reverse connecting protection structure of metal-oxide-semiconductor, and connecing for driving power is arranged in specially metal-oxide-semiconductor Q1
Ground terminal, wherein the drain electrode electric connection of power supply ground terminal of metal-oxide-semiconductor Q1, the source electrode of metal-oxide-semiconductor Q1 and the power pins electricity of control chip U1
Connection, the grid of metal-oxide-semiconductor Q1 are electrically connected with voltage input end；The output of the voltage input end, ground terminal and buck converter
End is connected to inserting terminal.When voltage input end and ground terminal correct wiring, the grid of metal-oxide-semiconductor Q1 is obtained from voltage input end
Ground terminal is connected in voltage signal, metal-oxide-semiconductor Q1；When voltage input end and reversed ground terminal, the grid of metal-oxide-semiconductor Q1 fails to receive electricity
Signal is pressed, to end alive ground terminal, prevents excessively high voltage from damaging the component of driving power.
In order to guarantee the normal work of metal-oxide-semiconductor Q1, the input terminal of driving power, which is additionally provided with, to be sequentially connected with to form conductive loop
Divider resistance R1, electrolytic capacitor EC1 and diode D1, divider resistance R1 one end connection metal-oxide-semiconductor Q1 grid, guarantee flow into
The voltage signal of metal-oxide-semiconductor Q1 grid is connect by zone of reasonableness, electrolytic capacitor EC1 on divider resistance R1 and metal-oxide-semiconductor Q1, wherein
The source electrode of the cathode connection metal-oxide-semiconductor of electrolytic capacitor EC1, electrolytic capacitor EC1 remove the interference in input signal, and diode D1 is used for
Pressure stabilizing, the cathode of the anode electrical connection electrolytic capacitor EC1 of diode D1, the grid of the cathode electrical connection metal-oxide-semiconductor Q1 of diode D1.
Voltage input end is additionally provided with the input inductance L2 for filtering, and voltage input end is opened by input inductance L2 and control chip U1's
Dynamic pin electrical connection.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, although referring to before
Embodiment is stated the utility model is described in detail, it for those skilled in the art, still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features.It is all this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (3)
1. a kind of driving power for LED car lamp characterized by comprising
Metal-oxide-semiconductor Q1, control chip U1, metal-oxide-semiconductor Q2, high-frequency inductor L1, sustained diode 1 and sampling resistor R1 in parallel each other,
R2,R3；
The starting pin external voltage input terminal of the control chip U1, controls chip U1, metal-oxide-semiconductor Q2, high-frequency inductor L1, afterflow
Diode D1 and sampling resistor R1, R2, R3 form the buck converter of non-isolated constant current output；
The ground terminal of driving power is arranged in the metal-oxide-semiconductor Q1, wherein the drain electrode electric connection of power supply ground terminal of metal-oxide-semiconductor Q1, MOS
The source electrode of pipe Q1 is electrically connected with the power pins of control chip U1, and the grid of metal-oxide-semiconductor Q1 is electrically connected with voltage input end；The electricity
The output end of pressure input terminal, ground terminal and buck converter is connected to inserting terminal.
2. a kind of driving power for LED car lamp according to claim 1, it is characterised in that: the control chip U1
Chip U1 is controlled for KT5006 series, wherein the gate driving pin of control chip U1, metal-oxide-semiconductor Q2 is arranged in the metal-oxide-semiconductor Q2
It is electrically connected with high-frequency inductor L1, sustained diode 1 is located at the bypass of high-frequency inductor L1, the cathode of sustained diode 1 and control
The starting pin of chip U1 is electrically connected, and the power pin of control chip U1 is connected to thermistor R6.
3. a kind of driving power for LED car lamp according to claim 1, which is characterized in that further include: input inductance
L2 and it is sequentially connected with the divider resistance R1, electrolytic capacitor EC1 and diode D1 to form conductive loop；The voltage input end is logical
It crosses input inductance L2 and is electrically connected with the starting pin for controlling chip U1, the grid of one end connection metal-oxide-semiconductor Q1 of the divider resistance R1
Pole, the source electrode of the cathode connection metal-oxide-semiconductor of electrolytic capacitor EC1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822120954.2U CN209390430U (en) | 2018-12-15 | 2018-12-15 | A kind of LED car lamp driving power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822120954.2U CN209390430U (en) | 2018-12-15 | 2018-12-15 | A kind of LED car lamp driving power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209390430U true CN209390430U (en) | 2019-09-13 |
Family
ID=67872459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822120954.2U Active CN209390430U (en) | 2018-12-15 | 2018-12-15 | A kind of LED car lamp driving power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209390430U (en) |
-
2018
- 2018-12-15 CN CN201822120954.2U patent/CN209390430U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103491682B (en) | Linear switching constant-current LED drive circuit for control over peak current | |
| CN102105007B (en) | LED constant-current driver with boosting function | |
| CN103648202A (en) | Active power factor correction control circuit, chip and LED (Light Emitting Diode) drive circuit | |
| CN102833902B (en) | Booster type constant current driver circuit for LED | |
| CN104427698A (en) | Control circuit | |
| CN202310206U (en) | Control circuit of ultra-low-power single wire power supply touch switch | |
| CN203590562U (en) | LED switch constant current driving circuit | |
| CN202738178U (en) | LED voltage reduction drive circuit | |
| CN209390430U (en) | A kind of LED car lamp driving power | |
| CN204031528U (en) | A kind of energy-conservation driving circuit of high-power LED lamp | |
| CN103857101B (en) | A kind of drive circuit and light fixture | |
| CN204145795U (en) | Have APFC function without working frequency ripple wave LED streetlamp power source | |
| CN104735837A (en) | LED street lamp power supply without power frequency ripples and with APFC function | |
| CN204271611U (en) | A kind of alternating current inputting over/under voltage protective circuit | |
| CN204948408U (en) | A kind of LED music lamp based on Bluetooth control | |
| CN204465978U (en) | A kind of LED power with short-circuit protection circuit | |
| CN202679243U (en) | BJT type self-excited Buck converter with small main switch tube driving loss | |
| CN209571032U (en) | A kind of light alarm | |
| CN202841597U (en) | LED constant-current driving power supply | |
| CN105406711A (en) | Two-way voltage conversion control chip, two-way voltage converter and electronic watt-hour meter | |
| CN205847668U (en) | A kind of linear light-adjustable LED lamp | |
| CN203708560U (en) | Load drive circuit of low voltage DC power supply equipment | |
| CN104640282A (en) | Dimmable LED circuit | |
| CN204069452U (en) | Based on APFC without stroboscopic LED constant current Drive and Control Circuit | |
| CN108966415A (en) | A kind of constant pressure and flow circuit of high power LED device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |