CN201219237Y - Quick start apparatus of switch power supply - Google Patents

Abstract

The objective of the utility model is to disclose a fast start device of a switch power supply, which includes a device body. A circuit is provided in the device body, the circuit includes a triggering module for starting up the complete device and a drive module for triggering the triggering module. The high-voltage DC voltage after the bridge stack rectifying starts up the triggering module, and the drive module outputs a voltage to supply the switch power source chip; the high-voltage DC voltage after the bridge stack rectifying can produce a trigger current by the triggering module, accordingly triggering the start-up module to start up to supply the switch power source chip. When the trigger current produced by the triggering module is 0, the start-up module switches off, the fast start device of a switch power supply stops working, and scarcely consumes any energy, thereby realizing the objective of the utility model.

Description

The Switching Power Supply device for rapidly starting

Technical field

The utility model relates to a kind of device for rapidly starting, particularly a kind of Switching Power Supply device for rapidly starting that can start, be applicable to electronic products such as Switching Power Supply in the short time high efficiency fast.

Background technology

Since the sixties in last century, Switching Power Supply was come out and since Switching Power Supply efficient, power density is high and advantage such as in light weight and progressively replaced linear stabilized power supply and SCR phase-controlled power; In so far more than 40 year, switch power technology has had swift and violent development and variation, integrated technology three developing stage of power semiconductor, high frequencyization and soft switch technique, switch power supply system have been experienced, yet, the efficient of power supply is required still improving constantly in energy today in short supply day by day.

Begin from the eighties in last century, power device develops into MOS type device (power MOSFET, IGBT, IGCT etc.) from bipolar device (BPT, SCR, GTO), make power electronic system realize more high frequencyization, and reduce conduction loss significantly, circuit is also more simple; And in future, carborundum (SiC) semiconductor device wafer material is expected to obtain large-scale application, can further reduce conduction loss; Aspect magnetic core, also lead alloy, ferrite, ferrocart core and amorphous evolution through the silicon steel sheet of associating, perseverance; Aspect circuit structure, circuit such as resonant switch (soft switch), synchronous rectification and active clamp progressively appear in beginning, to improve constantly the efficient of power supply.

From above several aspects, can see in the evolution of switch power technology, the device for rapidly starting of Switching Power Supply is not improved and develop, and in fact, there is apparent in view weak point in the device for rapidly starting of traditional Switching Power Supply.

Referring to Fig. 1, be example with existing Switching Power Supply, extremely fast start from exchanging L or N, then institute's power consumed is: $P=\frac{U^2}{R}=\frac{{(0.45\×U_r-U_1)}^2}{R},$ Wherein, R is a starting resistance, U _rBe the AC-input voltage effective value, voltage when Ul is UC384X Switching Power Supply operate as normal, establishing R is 91K, U _rBe 230V, Ul is 12V, and then P=0.092W is bigger for the effectiveness affects of small-power power.If after being enabled in rectifier bridge fast, $P=\frac{U^2}{R}=\frac{{(1.414\×U_r-U_1)}^2}{R},$ If R is 120K, U _rBe 230V, Ul is 12V, P=0.818W then, if when high-pressure side (U _rBe 264V), P=1.088W.The power consumption of this moment also badly influences efficient, hot property and the life-span of Switching Power Supply, so must the device for rapidly starting of existing Switching Power Supply be improved.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of Switching Power Supply device for rapidly starting, need not to consume power consumption after the startup action is finished, and improves efficient, hot property and the life-span of Switching Power Supply effectively.

Technical problem to be solved in the utility model can be achieved through the following technical solutions:

A kind of Switching Power Supply device for rapidly starting, it comprises device body, it is characterized in that, be provided with circuit in the described device body, its circuit comprises that one is used to make the trigger module and the driver module by described trigger module triggering of whole device startup, high-voltage dc voltage after the rectification of bridge heap starts described trigger module, is the switching power source chip power supply by described driver module output voltage.

In the Switching Power Supply device for rapidly starting of the present utility model, described trigger module is made of resistance R 1 and electrochemical capacitor C1, and described driver module is made of triode Q1, diode D1 and resistance R 2; Resistance R 1 connects the collector electrode of electrochemical capacitor C1 and triode Q1 respectively, the other end of electrochemical capacitor C1 connects the base stage of negative pole, resistance R 2 and the triode Q1 of diode D1 respectively, and the other end of the positive pole of diode D1, resistance R 2 and the emitter of triode Q1 are connected to each other output voltage.

In another Switching Power Supply device for rapidly starting of the present utility model, described trigger module is made of resistance R 1, R2, and described driver module is made of metal-oxide-semiconductor Q1, Q2 and diode D1; Resistance R 1 connects the drain electrode of resistance R 2 and metal-oxide-semiconductor Q1 respectively, the other end of resistance R 2 connects the drain electrode of grid and the metal-oxide-semiconductor Q2 of metal-oxide-semiconductor Q1 respectively, the source ground of metal-oxide-semiconductor Q2, the source electrode of metal-oxide-semiconductor Q1 connects the negative pole of diode D1, and the positive pole of diode D1 connects the grid output voltage of metal-oxide-semiconductor Q2.

Switching Power Supply device for rapidly starting of the present utility model, high-voltage dc voltage after the rectification of bridge heap produces a trigger current by described trigger module, thereby triggering described startup module starts to switching power source chip and powers, the trigger current that produces when described trigger module is 0, described startup module by, described Switching Power Supply device for rapidly starting quits work, and consumed energy is realized the purpose of this utility model hardly.

Description of drawings

Fig. 1 is the circuit theory diagrams of existing Switching Power Supply device for rapidly starting;

Fig. 2 is the structured flowchart of Switching Power Supply device for rapidly starting of the present utility model;

Fig. 3 is the circuit theory diagrams of Switching Power Supply device for rapidly starting of the present utility model;

Fig. 4 is the circuit theory diagrams of another kind of Switching Power Supply device for rapidly starting of the present utility model.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

As shown in Figure 2, a kind of Switching Power Supply device for rapidly starting, it comprises device body 1, be provided with circuit in the device body 1, its circuit comprises that one is used to make the trigger module 2 and the driver module 3 by described trigger module triggering of whole device startup, high-voltage dc voltage Vin after the rectification of bridge heap starts trigger module 2, is the switching power source chip power supply by driver module 3 output voltage V cc.

As shown in Figure 3, in the Switching Power Supply device for rapidly starting of the present utility model, trigger module 2 is made of resistance R 1 and electrochemical capacitor C1, and driver module 3 is made of triode Q1, diode D1 and resistance R 2; Resistance R 1 connects the collector electrode of electrochemical capacitor C1 and triode Q1 respectively, the other end of electrochemical capacitor C1 connects the base stage of negative pole, resistance R 2 and the triode Q1 of diode D1 respectively, and the other end of the positive pole of diode D1, resistance R 2 and the emitter of triode Q1 are connected to each other output voltage.

After the power supply start, high-voltage dc voltage Vin after the rectification of bridge heap gives electrochemical capacitor C1 charging through resistance R 1, can produce a charging current I1 this moment, this electric current I 1 produces a bias voltage through resistance R 2 in the base stage of brilliant body Q1, this bias voltage triggers brilliant body Q1 saturation conduction, produces electric current I 2, and electric current I 2 output voltage V cc start chip, the A place is auxiliary winding, and the B place is the chip power supply end; Auxiliary winding senses voltage vcc and rectifying and wave-filtering outputs to the A place, gives chip power supply.After electrochemical capacitor C1 was filled, electric current I 1 was 0, brilliant body Q1 by, open circuit soon and quit work, hardly consumed energy.

After power supply shutdown, diode D1, electrochemical capacitor C1 and resistance R 1 form discharge loop, the energy storage on the electrochemical capacitor C1 are discharged, for quick open, start is next time prepared.

In this Switching Power Supply device for rapidly starting, resistance R 1 is a common material resistance, and resistance value can not be excessive, otherwise start-up time can be very long, even can't start, and in addition to power and withstand voltagely also will pay special attention to, this resistance plays metering function; Electrochemical capacitor C1 is a standard universal type electrochemical capacitor, and capacitance can not be excessive, otherwise brilliant body Q1 base voltage can be too high, damage brilliant body Q1, capacitor leakage current should satisfy I≤0.03CV+40uAMAX, and temperature is at-20～+ 105 ℃, and operating voltage should be higher than supply voltage Vin; Brilliant body Q1 is a NPN type triode, requires withstand voltage greater than supply voltage Vin between its collector electrode and the emitter, and base current is as far as possible little during its saturation conduction, to the frequency response no requirement (NR); Diode D1 should be Schottky diode, and perhaps Ultrafast recovery diode oppositely withstand voltagely gets final product at 30V, and operating current gets final product greater than 50mA; Resistance R 2 is a biasing resistor, is common material resistance, and its resistance value can not be excessive, otherwise the base voltage of brilliant body Q1 is too high, damages brilliant body Q1, can not be too small, and brilliant body Q1 can not be by open-minded when too small, and power supply can't start.

In this Switching Power Supply device for rapidly starting, the charging interval T1 that must satisfy electrochemical capacitor C1 is greater than power initiation time T 2, otherwise power initiation failure, the electrochemical capacitor C2 that perhaps adds one (47～100) uF/35V on the AB line is when brilliant body Q1 conduction period can keep switching power source chip operating time T1 for electrochemical capacitor energy that C2 fills to get final product.

As shown in Figure 4, in another Switching Power Supply device for rapidly starting of the present utility model, trigger module 2 is made of resistance R 1, R2, and driver module 3 is made of metal-oxide-semiconductor Q1, Q2 and diode D1; Resistance R 1 connects the drain electrode of resistance R 2 and metal-oxide-semiconductor Q1 respectively, the other end of resistance R 2 connects the drain electrode of grid and the metal-oxide-semiconductor Q2 of metal-oxide-semiconductor Q1 respectively, the source ground of metal-oxide-semiconductor Q2, the source electrode of metal-oxide-semiconductor Q1 connects the negative pole of diode D1, and the positive pole of diode D1 connects the grid output voltage of metal-oxide-semiconductor Q2.

Above-mentioned Switching Power Supply device for rapidly starting is the modified model of conventional start-up circuit, its cost is slightly higher than Switching Power Supply device for rapidly starting shown in Figure 3, and power supply is when operate as normal, by resistance R 1, R2 and metal-oxide-semiconductor Q2 constitute the loop, still have less energy consuming, so this circuit is not best high efficiency fast start circuit.

More than show and described basic principle of the present utility model and principal character and advantage thereof.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (3)

1, a kind of Switching Power Supply device for rapidly starting, it comprises device body, it is characterized in that, be provided with circuit in the described device body, its circuit comprises that one is used to make the trigger module and the driver module by described trigger module triggering of whole device startup, high-voltage dc voltage after the rectification of bridge heap starts described trigger module, is the switching power source chip power supply by described driver module output voltage.

2, Switching Power Supply device for rapidly starting as claimed in claim 1 is characterized in that, described trigger module is made of resistance R 1 and electrochemical capacitor C1, and described driver module is made of triode Q1, diode D1 and resistance R 2; Resistance R 1 connects the collector electrode of electrochemical capacitor C1 and triode Q1 respectively, the other end of electrochemical capacitor C1 connects the base stage of negative pole, resistance R 2 and the triode Q1 of diode D1 respectively, and the other end of the positive pole of diode D1, resistance R 2 and the emitter of triode Q1 are connected to each other output voltage.

3, Switching Power Supply device for rapidly starting as claimed in claim 1 is characterized in that, described trigger module is made of resistance R 1, R2, and described driver module is made of metal-oxide-semiconductor Q1, Q2 and diode D1; Resistance R 1 connects the drain electrode of resistance R 2 and metal-oxide-semiconductor Q1 respectively, the other end of resistance R 2 connects the drain electrode of grid and the metal-oxide-semiconductor Q2 of metal-oxide-semiconductor Q1 respectively, the source ground of metal-oxide-semiconductor Q2, the source electrode of metal-oxide-semiconductor Q1 connects the negative pole of diode D1, and the positive pole of diode D1 connects the grid output voltage of metal-oxide-semiconductor Q2.

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