CN206349937U - A kind of output switch power source circuit of Width funtion - Google Patents
A kind of output switch power source circuit of Width funtion Download PDFInfo
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- CN206349937U CN206349937U CN201621480332.5U CN201621480332U CN206349937U CN 206349937 U CN206349937 U CN 206349937U CN 201621480332 U CN201621480332 U CN 201621480332U CN 206349937 U CN206349937 U CN 206349937U
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Abstract
The utility model discloses a kind of output switch power source circuit of Width funtion, including the high frequency transformer provided with output winding and assists winding, output rectifier and filter is connected on output winding, auxiliary end current rectifying and wave filtering circuit is connected with assists winding, the positive pole of assists winding is connected in the power pins of chip, including mu balanced circuit, mu balanced circuit includes triode, resistance and voltage-regulator diode, the colelctor electrode of triode is with aiding in end current rectifying and wave filtering circuit phase year after year, the emitter stage of triode is connected with the power pins of chip, the base stage of triode be connected on the negative pole of voltage-regulator diode and voltage-regulator diode plus earth, resistance is connected between the colelctor electrode of triode and base stage.Structure setting of the present utility model rationally, is provided with mu balanced circuit, wider in the voltage range of assists winding, but chip will not be damaged because of overtension, so as to ensure that the stability and reliability of chip power, strong applicability and practicality is good.
Description
Technical field
The utility model belongs to LED power circuit, and in particular to a kind of output switch power source circuit of Width funtion.
Background technology
LED power increasingly receives concern, the power circuit quilt of a collection of high performance-price ratio as the core component of LED lamp
It is widely used in LED industry.Different from the Switching Power Supply of household electrical appliances and large scale equipment machine, LED drivings are in ripple and export
It is not strict with very much in the control of pressure point, the wide power output of wide output voltage turns into the inherent characteristic of LED power, single power supply
Multiple light fixtures can be matched, the specifications and models for reducing power supply are also beneficial to the standardization in market.But the control of many Switching Power Supplies
Chip is limited by the bound of VCC voltages, is restricted output voltage.
The content of the invention
The output that the purpose of this utility model is to provide the Width funtion that a kind of structure setting is reasonable and stability in use is good is opened
Powered-down source circuit.
The technical scheme for realizing the utility model purpose is a kind of output switch power source circuit of Width funtion, including provided with defeated
Go out winding and the high frequency transformer of assists winding, output rectifier and filter is connected on the output winding, described auxiliary
Help on winding and be connected with auxiliary end current rectifying and wave filtering circuit, the positive pole of the assists winding is connected in the power pins of chip, is wrapped
Mu balanced circuit is included, the mu balanced circuit is connected between auxiliary end current rectifying and wave filtering circuit and the power pins of chip, the voltage stabilizing
Circuit includes triode, resistance and voltage-regulator diode, the colelctor electrode of the triode with auxiliary end current rectifying and wave filtering circuit phase year after year,
The emitter stage of triode is connected with the power pins of chip, and the base stage of the triode is connected on the negative pole of voltage-regulator diode
And the plus earth of voltage-regulator diode, the resistance is connected between the colelctor electrode of triode and base stage.
The triode is NPN type triode.
The resistance of the resistance is 510 Ω.
The utility model has positive effect：Structure setting of the present utility model rationally, is provided with mu balanced circuit,
The voltage range of assists winding is wider, but chip will not be damaged because of overtension, so as to ensure that the steady of chip power
Qualitative and reliability, strong applicability and practicality are good.
Brief description of the drawings
In order that content of the present utility model is more likely to be clearly understood, below according to specific embodiment and with reference to attached
Figure, is described in further detail to the utility model, wherein：
Fig. 1 is structural representation of the present utility model.
Embodiment
（Embodiment 1）
Fig. 1 shows a kind of embodiment of the present utility model, and wherein Fig. 1 is structural representation of the present utility model
Figure.
See Fig. 1, a kind of output switch power source circuit of Width funtion, including the height provided with output winding N2 and assists winding N1
Frequency power transformer 1, is connected to output rectifier and filter 2 on the output winding N2, is connected with the assists winding N1
End current rectifying and wave filtering circuit 3 is aided in, the positive pole of the assists winding N1 is connected in the power pins of chip IC, including mu balanced circuit
4, the mu balanced circuit 4 is connected between auxiliary end current rectifying and wave filtering circuit 3 and the power pins of chip IC, the mu balanced circuit 4
Including triode Q1, resistance R1 and voltage-regulator diode ZD1, the colelctor electrode of the triode is connected with auxiliary end current rectifying and wave filtering circuit
Year, the emitter stage of triode are connected with the power pins of chip, and the base stage of the triode is connected to the negative of voltage-regulator diode
The plus earth of extremely upper and voltage-regulator diode, the resistance is connected between the colelctor electrode of triode and base stage.
The triode is NPN type triode.
The resistance of the resistance is 510 Ω.
When LED output voltages are higher, the voltage that output winding N2 reflexes to assists winding N1 is also higher,
Triode string voltage stabilizing below were it not for, assists winding N1 voltages too high can cause to burn out IC.
After serial regulating circuit, the principle of stabilized voltage of VCC assists windings is as follows：
Vout↑—VN1↑—Izd1↑—Ib↓—Ic↓—Uce↑—Vcc↓
Voltage stabilizing adjustment effect can be played by Vcc=Uc1-Uce serial loops so that IC VCC pin are protected.
This circuit controls collector current Ic by the amplification characteristic of triode by base current Ib, so that Uce is controlled,
By Vcc, Uc1, the serial loop of Uce compositions controls IC supply voltage.There is mu balanced circuit, even if output voltage compares
Height, also will not cause IC to damage because of reflected voltage height, so as to accomplish the Width funtion demand of power supply.
Structure setting of the present utility model rationally, is provided with mu balanced circuit, wider in the voltage range of assists winding, still
Chip will not be damaged because of overtension, so as to ensure that the stability and reliability of chip power, strong applicability and practicality
Property is good.
Obviously, above-described embodiment of the present utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, in described above
On the basis of can also make other changes in different forms.There is no need and unable to give all embodiments
It is exhaustive.And these belong to the obvious changes or variations that connotation of the present utility model extends out and still fall within this practicality
New protection domain.
Claims (3)
1. a kind of output switch power source circuit of Width funtion, including the high frequency transformer provided with output winding and assists winding,
Output rectifier and filter is connected on the output winding, auxiliary end rectifying and wave-filtering electricity is connected with the assists winding
Road, the positive pole of the assists winding is connected in the power pins of chip, it is characterised in that：Including mu balanced circuit, the voltage stabilizing
It is electrically connected to aid between end current rectifying and wave filtering circuit and the power pins of chip, the mu balanced circuit includes triode, resistance
And voltage-regulator diode, the colelctor electrode of the triode and auxiliary end current rectifying and wave filtering circuit mutually year after year, the emitter stage and core of triode
The power pins of piece are connected, the base stage of the triode be connected on the negative pole of voltage-regulator diode and voltage-regulator diode positive pole
Ground connection, the resistance is connected between the colelctor electrode of triode and base stage.
2. a kind of output switch power source circuit of Width funtion according to claim 1, it is characterised in that：The triode is
NPN type triode.
3. a kind of output switch power source circuit of Width funtion according to claim 2, it is characterised in that：The resistance of the resistance
It is worth for 510 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621480332.5U CN206349937U (en) | 2016-12-30 | 2016-12-30 | A kind of output switch power source circuit of Width funtion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621480332.5U CN206349937U (en) | 2016-12-30 | 2016-12-30 | A kind of output switch power source circuit of Width funtion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206349937U true CN206349937U (en) | 2017-07-21 |
Family
ID=59319737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621480332.5U Active CN206349937U (en) | 2016-12-30 | 2016-12-30 | A kind of output switch power source circuit of Width funtion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206349937U (en) |
-
2016
- 2016-12-30 CN CN201621480332.5U patent/CN206349937U/en active Active
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