CN103973089B - High-voltage starting circuit and system - Google Patents

Abstract

The present invention discloses a high-voltage startup circuit, comprising: a high-voltage transistor, a first resistor, a switch element, a sixth transistor, a fifth transistor and a voltage regulator. When in the initial state of power-on, the input signal end of the voltage regulator is at a low potential, and the control switch element and the fifth transistor are turned on so that the DC power flows through the first side of the transformer, the high-voltage transistor, and the fifth transistor and is shunted as a startup current to the controller. After startup, the controller controls the input signal end of the voltage regulator to be at a high potential, so that the voltage regulator controls the switch element and the fifth transistor to be turned off, and the DC power will not flow through the switch element and the first resistor, so that the steady-state power consumption of the high-voltage end of the transformer can be saved.

Description

High voltage starting circuit and system

technical field

The present invention relates to a starting circuit, in particular to a high-voltage starting circuit and system.

Background technique

In recent years, in order to improve the problem of global warming, countries all over the world have gradually required various electrical appliances to have the function of low power consumption in the standby state. For example, the "Energy Star" specification promoted by the United States is one of a series of voluntary "Energy Conservation Partnership Programs" jointly promoted by the US Environmental Protection Agency and the Department of Energy. It is hoped that through the Energy Star specification, the public will be encouraged to save energy consumption, thereby reducing carbon dioxide and other greenhouse gas emissions. Therefore, how to reduce the power consumption of electronic products in the home when they are not turned on has become an important issue in the design of power supply circuits.

Generally speaking, the power supply circuit includes a part of the high-voltage start-up circuit. Before the secondary side of the transformer is powered normally, the high-voltage start-up circuit can drive the transformer to work normally by taking the power supply with a higher voltage on the primary side to make the power circuit work normally, and the auxiliary winding side of the transformer provides relatively high voltage. low DC voltage. For example, U.S. Patent No. 5,285,369 is a high-voltage starting circuit designed on the primary side of a transformer in the prior art. The design of this high-voltage starting circuit is to establish a starting current path when power is turned on; the high-voltage starting circuit is used in starting the power supply circuit. After that, the starting current path is not cancelled. Since there is a resistor on the current path, the power consumption will continue to be consumed in the steady state after the power circuit is started.

At present, the high-voltage start-up circuits in the prior art all have the problem that the high-voltage start-up circuit still consumes power continuously in a steady state.

The above prior art will lead to the problem that the high-voltage start-up circuit located on the primary side of the transformer still consumes a large amount of power after the power supply is stabilized (in a steady state). Since the high-voltage starting circuit is only effective when the power circuit is started, it has no effect after the power circuit is started. Therefore, under the design concept of low power consumption of today's electronic products, how to reduce the power consumption of the high-voltage starting circuit in the steady state after the power circuit is started can improve the energy efficiency of electrical appliances. This point It has become an important issue in the design of power supply circuits.

Contents of the invention

In view of the above problems in the prior art, the object of the present invention is to provide a high voltage starting circuit.

The invention provides a high-voltage start-up circuit connected to a primary side of a transformer. The high-voltage start-up circuit includes: a high-voltage transistor, a first resistor, a switch element, a sixth transistor, a fifth transistor, a controller and a voltage regulator. The first end of the high voltage transistor is connected to the primary side of the transformer. The first terminal of the first resistor is connected to the control terminal of the high voltage transistor, and the second terminal of the first resistor is grounded. The first end of the switch element is connected to the second end of the high voltage transistor, and the second end of the switch element is connected to the first end of the first resistor. The first terminal of the sixth transistor is connected to the first terminal of the high voltage transistor, and the second terminal of the sixth transistor is connected to a ground terminal. The first terminal of the fifth transistor is connected to the second terminal of the high voltage transistor. The voltage regulator is connected to the control terminal of the switching element and the control terminal of the fifth transistor, and the power supply of the voltage regulator is connected to the second terminal of the high voltage transistor. The power supply end of the controller is connected to the second end of the fifth transistor and the auxiliary winding side of the transformer, the first control end of the controller is connected to the control end of the sixth transistor and a pulse modulation signal is input to make the secondary of the transformer side and the auxiliary winding side to generate an induced voltage, the second control terminal of the controller is connected to the input signal terminal of the voltage regulator, and the voltage regulator simultaneously controls the switching element and the fifth transistor to be turned on or off according to the signal of the second control terminal of the controller closure.

The present invention also provides a high-voltage starting circuit, which is used in a bridge rectifier and a transformer, connected to the primary side of a transformer, and used to provide a starting current to a controller after the transformer is powered on, and the controller starts to work Then stop supplying the startup current, the high voltage startup circuit includes: a high voltage transistor, a first resistor, a switch element, a fifth transistor and a voltage regulator. The first end of the high voltage transistor is connected to the primary side of the transformer. The first terminal of the first resistor is connected to the control terminal of the high voltage transistor, and the second terminal of the first resistor is connected to the ground terminal. The first end of the switch element is connected to the second end of the high voltage transistor, and the second end of the switch element is connected to the first end of the first resistor. The first terminal of the fifth transistor is connected to the second terminal of the high voltage transistor and a controller. The voltage regulator has an input signal terminal, the voltage regulator is connected to the control terminal of the switch element and the control terminal of the fifth transistor, and the power supply of the voltage regulator is connected to the second terminal of the high-voltage transistor, and the voltage regulator is connected to the second terminal of the high-voltage transistor according to the input signal terminal. The signal simultaneously controls the switching element and the fifth transistor to be turned on or off.

The present invention also provides a high-voltage starting system, including: a bridge rectifier, a transformer, a high-voltage transistor, a first resistor, a switching element, a sixth transistor, a fifth transistor, a voltage regulator and a control device. Wherein, the bridge rectifier inputs an AC power to generate a DC power. The primary side of the transformer is connected to the bridge rectifier. The first end of the high voltage transistor is connected to the primary side of the transformer. The first terminal of the first resistor is connected to the control terminal of the high voltage transistor, and the second terminal of the first resistor is grounded. The first end of the switch element is connected to the second end of the high voltage transistor, and the second end of the switch element is connected to the first end of the first resistor. The first terminal of the sixth transistor is connected to the first terminal of the high voltage transistor, and the second terminal of the sixth transistor is connected to a ground terminal. The first terminal of the fifth transistor is connected to the second terminal of the high voltage transistor. The voltage regulator is connected to the control terminal of the switching element and the control terminal of the fifth transistor, and the power supply of the voltage regulator is connected to the second terminal of the high voltage transistor. The power supply end of the controller is connected to the second end of the fifth transistor and the auxiliary winding side of the transformer, the first control end of the controller is connected to the control end of the sixth transistor and a pulse modulation signal is input to make The auxiliary winding side of the transformer generates an induced voltage, the second control terminal of the controller is connected to the input signal terminal of the voltage regulator, and the voltage regulator simultaneously controls the switching element and the signal of the second control terminal of the controller. The fifth transistor is turned on or off.

The main effect of the high-voltage starting circuit of the present invention is: in the high-voltage starting circuit on the primary side of the transformer, energy is only consumed during the transient period of starting after power-on; there is no power consumption during steady-state operation after starting, and can Significantly reduce the energy consumption generated by the high-voltage starting circuit on the primary side of the transformer.

In order to make the above-mentioned and other objects, features, and advantages of the present invention more comprehensible, several preferred embodiments are specifically cited below, together with the accompanying drawings, and are described in detail as follows:

Description of drawings

Fig. 1 is a schematic diagram of a high-voltage starting circuit of the present invention;

Fig. 2 is the schematic diagram of the path of the high-voltage starting circuit of the present invention;

Fig. 3 is the schematic diagram of closing the circuit of the high-voltage starting circuit of the present invention;

Fig. 4 is a detailed circuit diagram of another embodiment of the high voltage starting circuit of the present invention;

Fig. 5 is a schematic path diagram of another embodiment of the high-voltage starting circuit of the present invention;

FIG. 6 is a schematic diagram of circuit shutdown of another embodiment of the high voltage starting circuit of the present invention.

Fig. 7 is a detailed circuit schematic diagram of another embodiment of the high-voltage starting circuit of the present invention;

Fig. 8 is a schematic path diagram of another embodiment of the high-voltage starting circuit of the present invention;

FIG. 9 is a schematic diagram of circuit shutdown in another embodiment of the high-voltage starting circuit of the present invention; and

FIG. 10 is a schematic diagram of another high-voltage starting circuit of the present invention.

Wherein, the reference signs are explained as follows:

10 bridge rectifier

12 primary side

14th side

16 Auxiliary winding side

30 switching elements

32 voltage regulator

40 controller

100 high voltage start circuit

200 high voltage start circuit

C2 second capacitor

C3 third capacitor

C4 fourth capacitor

T1 Transformer

D1 first diode

D2 second diode

JF1 high voltage transistor

M5 fifth transistor

M6 sixth transistor

M7 seventh transistor

M10 tenth transistor

M11 eleventh transistor

M12 Twelfth Transistor

R1 first resistor

R2 second resistor

R3 third resistor

INV1 first inverter

INV2 second inverter

INV3 third inverter

detailed description

Please refer to the embodiment of FIG. 1 , which is a functional block diagram of a high-voltage start-up circuit 100 of the present invention, which is connected to a bridge rectifier 10 and a transformer T1 to generate a start-up current, so that the controller 40 can be started after power-on. The high voltage startup circuit 100 includes: a high voltage transistor JF1 , a first resistor R1 , a switch element 30 , a sixth transistor M6 , a fifth transistor M5 , a controller 40 and a voltage regulator 32 . Wherein, the bridge rectifier 10 receives AC power to generate DC power. The transformer T1 has a primary side 12 , a secondary side 14 and an auxiliary winding side 16 . The first end of the primary side 12 is connected to the first end of the bridge rectifier 10 . The first terminal (P-type) of the second diode D2 is connected to the first terminal of the auxiliary winding side 16 of the transformer T1. The first terminal of the fourth capacitor C4 is connected to the second terminal (N-type) of the second diode D2, and the second terminal of the fourth capacitor C4 is connected to the second terminal of the auxiliary winding side 16 of the transformer T1.

Wherein, the first terminal of the high voltage transistor JF1 is connected to the control terminal of the primary side 12 of the transformer T1. The first terminal of the first resistor R1 is connected to the control terminal of the high voltage transistor JF1 (the control terminal is the gate of the high voltage transistor JF1 ), and the second terminal of the first resistor R1 is grounded. The switch element 30 is connected to the second end of the high voltage transistor JF1, and the switch element 30 is connected to the first end of the first resistor R1. The first terminal of the sixth transistor M6 is connected to the first terminal of the high voltage transistor JF1, and the second terminal of the sixth transistor M6 is connected to a ground terminal. A first terminal of the fifth transistor M5 is connected to a second terminal of the high voltage transistor JF1. The first control terminal of the controller 40 is connected to the control terminal (gate) of the sixth transistor M6, and the power supply terminal of the controller 40 is connected to the second terminal of the fifth transistor M5 and the first terminal of the fourth capacitor C4. The voltage regulator 32 has an input signal terminal connected to the switch element 30 and a control terminal controlling the fifth transistor M5.

Wherein, the first control terminal of the controller 40 is connected to the control terminal of the sixth transistor M6 and connected to the second terminal of the fifth transistor M5. When the controller 40 is not powered on, the input signal terminal connected to it is at a low potential. Therefore, the voltage regulator 32 controls the switching element 30 and the fifth transistor M5 to be turned on simultaneously. At this time, the DC generated by the primary side 12 of the transformer T1 The power is shunted as a start-up current through the high-voltage transistor JF1 and the fifth transistor M5 to start the controller 40 . When the controller 40 starts up, the first control terminal of the controller 40 starts to send a pulse modulation signal to the sixth transistor M6 to switch the power supply of the transformer T1, so that the energy of the primary side 12 of the transformer T1 will be conducted to the transformer T1 side 16 of the auxiliary winding. After the controller 40 obtains the voltage Vbias provided by the auxiliary winding side 16 of the transformer T1, the second control terminal of the controller 40 provides a high potential to the signal input terminal of the voltage regulator 32 so that the voltage regulator 32 controls the switching element 30 and The fifth transistor M5 is turned off at the same time, so that the DC power supply is cut off. At the same time, the starting current is stopped to be supplied to the controller 40, and the shunt flowing through the first resistor R1 is also cut off without consuming energy. Wherein, the secondary side 14 of the transformer T1 can be given a normal load, usually 5 volts or 12 volts.

Hereinafter, several embodiments will be cited to illustrate the specific composition of the switching element 30 and the voltage regulator 32 of the present invention.

Next, please refer to FIG. 2, a detailed circuit diagram of a specific embodiment of the high-voltage starting circuit of the present invention, wherein the switching element 30 is a seventh transistor M7, which is an N-type complementary metal oxide semiconductor, and the voltage regulator 32 is the first inverter INV1. Since the initial state voltage Vbias at power-on is zero and the controller 40 is not activated in the initial state, the input (input signal terminal) of the first inverter INV1 connected thereto will be at a low potential. Therefore, after power-on, the DC power generated by the primary side 12 of the transformer T1 provides power to the first inverter INV1 through the high-voltage transistor JF1, and the first inverter INV1 will output a high potential because its input is a low potential , and then simultaneously control the seventh transistor M7/switching element 30 and the fifth transistor M5 to be turned on. When the seventh transistor M7 is turned on, the path of the DC power flow is path2, that is, it will flow through the first resistor R1: it is grounded through the transformer T1, the high-voltage transistor JF1, the seventh transistor M7 and the first resistor R1. At this time, the high voltage The gate (VJG) of transistor JF1 is approximately equal to the source (VJS) of high voltage transistor JF1. At the same time, the fifth transistor M5 is turned on, so that the current conducts and charges Vbias (path1).

Next, please refer to FIG. 3 , which is a schematic diagram of circuit shutdown of the high-voltage starting circuit of the present invention. About 100 ms to 200 ms after the system is powered on, the controller 40 has turned into the startup state, and the controller 40 starts to output a high potential to the input (input signal terminal) of the first inverter INV1 after starting normal operation. The first inverter INV1 will output a low potential because its input is a high potential, and then simultaneously control the seventh transistor M7/switching element 30 and the fifth transistor M5 to be closed, and the gate (VJG) of the high-voltage transistor JF1 is equal to ground, and the result , the current path path1 of the high voltage transistor JF1 is turned off, and at the same time, since the seventh transistor M7 is turned off, the current path path2 flowing through the first resistor R1 is also turned off. Thus, the high voltage startup circuit of the present invention will not consume any current in steady state. The controller 40 sends a pulse width signal to the sixth transistor M6 in the working state, so the primary side 12 of the transformer T1 continues to switch, so that the primary side 12 of the transformer T1 transmits energy to the auxiliary winding side 16 of the transformer T1. Thus, the power supply of the voltage Vbias at the auxiliary winding side 16 of the transformer T1 will continuously supply the controller 40 .

Next, please refer to FIG. 4 , which is a detailed circuit schematic diagram of another embodiment of the high voltage starting circuit of the present invention. Wherein, the switching element 30 is a tenth transistor M10, which is a P-type CMOS. Wherein, the voltage regulator 32 includes: a second resistor R2 , an eleventh transistor M11 and a second inverter INV2 . The first terminal of the second resistor R2 is connected to the second terminal of the high voltage transistor JF1, and the second terminal of the second resistor R2 is connected to the control terminal (gate) of the tenth transistor M10. The first terminal of the eleventh transistor M11 is connected to the second terminal of the second resistor R2, and the second terminal of the eleventh transistor M11 is grounded. The first terminal of the second inverter INV2 is connected to the controller 40, the second terminal of the second inverter INV2 is connected to the control terminal (gate) of the eleventh transistor M11, and the second terminal of the second inverter INV2 The two terminals are connected to the control terminal (gate) of the fifth transistor M5.

Please refer to FIG. 5 , which is a schematic circuit diagram of another embodiment of the high voltage startup circuit of the present invention. Since the initial state voltage Vbias is zero when powered on and the controller 40 is not activated in the initial state, the input (input signal terminal) of the second inverter INV2 connected thereto will be at a low potential. Therefore, after power-on, the DC power generated by the primary side 12 of the transformer T1 provides power to the second inverter INV2 through the high-voltage transistor JF1, and the second inverter INV2 will output a high potential because its input is a low voltage , and then simultaneously control the eleventh transistor M11/switching element 30 and the fifth transistor M5 to be turned on. When the eleventh transistor M11 is turned on, the voltage vmg is pulled to a low potential, so that the tenth transistor M10 is turned on. When the tenth transistor M10 is turned on, the path path4 of the DC power flow, that is, will flow through the first resistor R1: through the transformer T1, the high-voltage transistor JF1, the tenth transistor M10, and the first resistor R1, and then grounded. At this time, The gate (VJG) of the high voltage transistor JF1 is approximately equal to the source (VJS) of the high voltage transistor JF1. At the same time, since the fifth transistor M5 is turned on, the current is conducted to the controller 40 (startup current) and charges Vbias (path3).

Please refer to FIG. 6 , which is a schematic diagram of circuit shutdown of another embodiment of the high voltage starting circuit of the present invention. After waiting 100m seconds to 200m seconds, at this time, the controller 40 has turned to the start state, and the controller 40 starts to send a high potential to the input (input signal terminal) of the second inverter INV2 after starting normal work, the second inverter INV2 The inverter INV2 outputs a low potential because its input is a high potential, thereby simultaneously controlling the eleventh transistor M11 and the fifth transistor M5 to be turned off. At this time, the eleventh transistor M11 is turned off, so that the voltage vmg terminal is at a high potential, and then the tenth transistor M10/switching element 30 is turned off, and the gate (VJG) of the high-voltage transistor JF1 is equal to grounding. As a result, the current of the high-voltage transistor JF1 The path path3 is turned off, and at the same time, since the tenth transistor M10 is turned off, the current path path4 flowing through the first resistor R1 is also turned off. Therefore, the high-voltage start-up circuit of the present invention does not consume any current in a steady state. The controller 40 sends a pulse width signal to the sixth transistor M6 in the working state, so the primary side 12 of the transformer T1 continues to switch, so that the primary side 12 of the transformer T1 transmits energy to the auxiliary winding side 16 of the transformer T1. Thus, the power supply of the voltage Vbias at the auxiliary winding side 16 of the transformer T1 will continuously supply the controller 40 .

Please refer to FIG. 7 , which is a detailed circuit schematic diagram of another embodiment of the high voltage starting circuit of the present invention. Wherein, the switch element 30 is a seventh transistor M7, which is an N-type CMOS. Wherein, the voltage regulator 32 includes: a third resistor R3, a twelfth transistor M12 and a third inverter INV3. The first terminal of the third resistor R3 is connected to the second terminal of the high voltage transistor JF1, and the second terminal of the third resistor R3 is connected to the control terminal (gate) of the seventh transistor M7. The first terminal of the twelfth transistor M12 is connected to the second terminal of the third resistor R3, and the second terminal of the twelfth transistor M12 is grounded. The first terminal of the third inverter INV3 is connected to the controller 40, the first terminal of the third inverter INV3 is connected to the control terminal (gate) of the twelfth transistor M12, and the first terminal of the third inverter INV3 The two terminals are connected to the control terminal (gate) of the fifth transistor M5.

Please refer to FIG. 8 , which is a schematic circuit diagram of another embodiment of the high voltage startup circuit of the present invention. Since the initial state voltage Vbias is zero when powered on and the controller 40 is not activated in the initial state, the input (input signal terminal) of the third inverter INV3 connected thereto will be at low potential. Therefore, after power-on, the DC power generated by the first side 12 of the transformer T1 provides power to the third inverter INV3 through the high-voltage transistor JF1, and the third inverter INV3 will output a high voltage because its input is a low voltage. Potential fifth transistor M5 is turned on. And the controller 40 is not activated in the initial state and the output is a low potential so that the seventh transistor M7/switching element 30 is turned on. When the twelfth transistor M12 is turned off, the voltage vmg is pulled to a high potential so that the seventh transistor M7 is turned on. Transistor M7 is turned on. When the seventh transistor M7 is turned on, the path path6 of the DC power flow, that is, will flow through the first resistor R1: through the transformer T1, the high-voltage transistor JF1, the seventh transistor M7, and the first resistor R1, and then grounded. At this time, The gate (VJG) of the high voltage transistor JF1 is approximately equal to the source (VJS) of the high voltage transistor JF1. At the same time, since the fifth transistor M5 is turned on, the current is conducted to the controller 40 (startup current) and charges Vbias (path5).

Please refer to FIG. 9 , which is a schematic diagram of circuit shutdown of another embodiment of the high voltage starting circuit of the present invention. After waiting 100m seconds to 200m seconds, at this time, the controller 40 has turned into the start state, and the controller 40 starts to send a high potential to the input (input signal terminal) of the third inverter INV3 after starting normal work, and the third inverter INV3 The inverter INV3 outputs a low potential because its input is a high potential, so that the fifth transistor M5 is turned off. After the controller 40 starts to work normally, it starts to send a high potential to the twelfth transistor M12, so that the twelfth transistor M12 is turned on, so that the voltage vmg end is a low potential, and then the seventh transistor M7 is turned off, and the high voltage transistor JF1 The gate (VJG) is equal to ground, as a result, the current path path5 of the high voltage transistor JF1 is turned off, and at the same time, since the seventh transistor M7 is turned off, the current path path6 flowing through the first resistor R1 is also turned off. The controller 40 sends a pulse width signal to the sixth transistor M6 in the working state, so the primary side 12 of the transformer T1 continues to switch, so that the primary side 12 of the transformer T1 transmits energy to the auxiliary winding side 16 of the transformer T1. Thus, the power supply of the voltage Vbias at the auxiliary winding side 16 of the transformer T1 will continuously supply the controller 40 .

Please refer to the embodiment of FIG. 10 , which is a functional block diagram of the high voltage startup circuit 200 of the present invention, wherein the difference between FIG. 10 and FIG. 1 is that FIG. 10 does not have the controller 40 and the sixth transistor M6, and the controller 40 is not Control voltage regulator 32 . In practical embodiments, the voltage on the auxiliary winding side 16 of the transformer T1 can be used to connect to the controller 40 . Wherein, the first terminal of the high voltage transistor JF1 is connected to the control terminal of the primary side 12 of the transformer T1. The first terminal of the first resistor R1 is connected to the control terminal of the high voltage transistor JF1, and the second terminal of the first resistor R1 is grounded. A first end of the switch element 30 is connected to a second end of the high voltage transistor JF1, and a second end of the switch element 30 is connected to a first end of the first resistor R1. The first terminal of the fifth transistor M5 is connected to the second terminal of the high voltage transistor JF1 and a controller 40 . The voltage regulator 32 is connected to the control terminal of the switching element 30 and the control terminal of the fifth transistor M5, and the power supply of the voltage regulator 32 is connected to the second terminal of the high-voltage transistor JF1, and the voltage regulator 32 controls the switch simultaneously according to the signal of the input signal terminal The element 30 and the fifth transistor M5 are turned on or off. The signal at the input signal terminal may be provided by the controller 40, or may be provided by other means, for example, the voltage at the auxiliary winding side 16 of the transformer is connected to the signal input terminal. In this way, the control requirement of making the signal input end change from low/high potential at power-on to high/low potential at steady state can be met.

By using the present invention, the characteristic that the high-voltage starting circuit does not consume power in a steady state can be obtained. The invention can be applied to any power system with high-voltage AC input, and can provide the starting current required by the control IC when starting. Compared with the previously used technology, the high-voltage start-up circuit of the present invention consumes almost no current during steady-state operation, and its energy consumption is only generated by the leakage current generated by the semiconductor device. Therefore, the high-voltage startup circuit of the present invention enables the power supply circuit to achieve excellent power-saving efficiency.

Although the preferred embodiments of the present invention are disclosed above, they are not intended to limit the present invention, and any skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. The scope of patent protection of the present invention must be defined by the scope of patent claims attached to this specification.

Claims (18)

1. a high-voltage starting circuit, is connected to the primary side of a transformer, and this high-voltage starting circuit comprises:

One high voltage transistor, the first end of this high voltage transistor is connected to the primary side of this transformer;

One first resistance, the first end of this first resistance is connected to the control end of this high voltage transistor, the second end ground connection of this first resistance;

One switch element, the first end of this switch element is connected to the second end of this high voltage transistor, and the second end of this switch element is connected to the first end of this first resistance;

One the 6th transistor, the first end of the 6th transistor is connected to the first end of this high voltage transistor, and the second end of the 6th transistor is connected to a ground end;

One the 5th transistor, the first end of the 5th transistor is connected to the second end of this high voltage transistor;

One voltage regulator, this voltage regulator is connected to the control end of this switch element and the control end controlling the 5th transistor, and the power supply of this voltage regulator is connected to the second end of this high voltage transistor;

One controller, the power end of this controller is connected to the second end of the 5th transistor and the auxiliary winding side of this transformer, first control end of this controller is connected to the control end of the 6th transistor and inputs a pulse wave modulating signal and make the auxiliary winding side of this transformer produce an induced voltage, second control end of this controller is connected to the input signal end of this voltage regulator, and this voltage regulator controls unlatching or the closedown of this switch element and the 5th transistor according to the signal of the second control end of this controller simultaneously.

2. high-voltage starting circuit as claimed in claim 1, wherein this switch element is one the 7th transistor, and is a N-type CMOS (Complementary Metal Oxide Semiconductor).

3. high-voltage starting circuit as claimed in claim 2, wherein this voltage regulator is one first inverter.

4. high-voltage starting circuit as claimed in claim 2, wherein this voltage regulator comprises:

One the 3rd resistance, the first end of the 3rd resistance connects the second end of this high voltage transistor, and the second end of the 3rd resistance is connected to the control end of the 7th transistor;

The tenth two-transistor, the first end of the tenth two-transistor is connected to the second end of the 3rd resistance, and the control end of the tenth two-transistor is connected to this controller, and the second end of the tenth two-transistor is connected to this ground end; And

One the 3rd inverter, the first end of the 3rd inverter is connected to this controller, and the second end of the 3rd inverter is connected to the control end of the 5th transistor.

5. high-voltage starting circuit as claimed in claim 1, wherein this switch element is 1 the tenth transistor, and is a P type CMOS (Complementary Metal Oxide Semiconductor).

6. high-voltage starting circuit as claimed in claim 5, wherein this voltage regulator comprises:

One second resistance, the first end of this second resistance connects the second end of this high voltage transistor, and the second end of this second resistance is connected to the control end of the tenth transistor;

The 11 transistor, the first end of the 11 transistor is connected to the second end of this second resistance, the second end ground connection of the 11 transistor; And

One second inverter, the first end of this second inverter is connected to this controller, and the second end of this second inverter is connected to the control end of the 11 transistor, and the second end of this second inverter is connected to the control end of the 5th transistor.

7. a high-voltage starting circuit, is connected to the primary side of a transformer, and this high-voltage starting circuit comprises:

One high voltage transistor, the first end of this high voltage transistor is connected to the primary side of this transformer;

One first resistance, the first end of this first resistance is connected to the control end of this high voltage transistor, the second end ground connection of this first resistance;

One switch element, the first end of this switch element is connected to the second end of this high voltage transistor, and the second end of this switch element is connected to the first end of this first resistance;

One the 5th transistor, the first end of the 5th transistor is connected to the second end of this high voltage transistor, and the second end of the 5th transistor is connected to this transformer and assists winding side; And

One voltage regulator, there is an input signal end, this voltage regulator is connected to the control end of this switch element and the control end of the 5th transistor, and the power supply of this voltage regulator is connected to the second end of this high voltage transistor, this voltage regulator controls unlatching or the closedown of this switch element and the 5th transistor according to the signal of this input signal end simultaneously.

8. high-voltage starting circuit as claimed in claim 7, wherein this switch element is one the 7th transistor, and is a N-type CMOS (Complementary Metal Oxide Semiconductor).

9. high-voltage starting circuit as claimed in claim 8, wherein this voltage regulator is one first inverter.

10. high-voltage starting circuit as claimed in claim 8, also comprise a controller, wherein this voltage regulator comprises:

One the 3rd resistance, the first end of the 3rd resistance connects the second end of this high voltage transistor, and the second end of the 3rd resistance is connected to the control end of the 7th transistor;

The tenth two-transistor, the first end of the tenth two-transistor is connected to the second end of the 3rd resistance, and the control end of the tenth two-transistor is connected to this controller, the second end ground connection of the tenth two-transistor; And

One the 3rd inverter, the first end of the 3rd inverter is connected to this controller, and the second end of the 3rd inverter is connected to the control end of the 5th transistor.

11. high-voltage starting circuits as claimed in claim 7, wherein this switch element is 1 the tenth transistor, and is a P type CMOS (Complementary Metal Oxide Semiconductor).

12. high-voltage starting circuits as claimed in claim 11, also comprise a controller, wherein this voltage regulator comprises:

One second resistance, the first end of this second resistance connects the second end of this high voltage transistor, and the second end of this second resistance is connected to the control end of the tenth transistor;

The 11 transistor, the first end of the 11 transistor is connected to the second end of this second resistance, the second end ground connection of the 11 transistor; And

One second inverter, the first end of this second inverter is connected to this controller, and the second end of this second inverter is connected to the control end of the 11 transistor, and the second end of this second inverter is connected to the control end of the 5th transistor.

13. 1 kinds of high voltage startup systems, comprise:

One bridge rectifier, inputs an AC power and produces a DC power supply;

One transformer, the primary side of this transformer connects this bridge rectifier;

One high voltage transistor, the first end of this high voltage transistor is connected to the primary side of this transformer;

One first resistance, the first end of this first resistance is connected to the control end of this high voltage transistor, the second end ground connection of this first resistance;

One switch element, the first end of this switch element is connected to the second end of this high voltage transistor, and the second end of this switch element is connected to the first end of this first resistance;

One the 6th transistor, the first end of the 6th transistor is connected to the first end of this high voltage transistor, and the second end of the 6th transistor is connected to a ground end;

One the 5th transistor, the first end of the 5th transistor is connected to the second end of this high voltage transistor;

One voltage regulator, this voltage regulator is connected to the control end of this switch element and the control end controlling the 5th transistor, and the power supply of this voltage regulator is connected to the second end of this high voltage transistor;

One controller, the power end of this controller is connected to the second end of the 5th transistor and the auxiliary winding side of this transformer, first control end of this controller is connected to the control end of the 6th transistor and inputs a pulse wave modulating signal and make the secondary side of this transformer and auxiliary winding side produce an induced voltage, second control end of this controller is connected to the input signal end of this voltage regulator, and this voltage regulator controls unlatching or the closedown of this switch element and the 5th transistor according to the signal of the second control end of this controller simultaneously.

14. high voltage startup systems as claimed in claim 13, wherein this switch element is one the 7th transistor, and is a N-type CMOS (Complementary Metal Oxide Semiconductor).

15. high voltage startup systems as claimed in claim 14, wherein this voltage regulator is one first inverter.

16. high voltage startup systems as claimed in claim 14, wherein this voltage regulator comprises:

One the 3rd resistance, the first end of the 3rd resistance connects the second end of this high voltage transistor, and the second end of the 3rd resistance is connected to the control end of the 7th transistor;

The tenth two-transistor, the first end of the tenth two-transistor is connected to the second end of the 3rd resistance, and the control end of the tenth two-transistor is connected to this controller, and the second end of the tenth two-transistor is connected to this ground end; And

One the 3rd inverter, the first end of the 3rd inverter is connected to this controller, and the second end of the 3rd inverter is connected to the control end of the 5th transistor.

17. high voltage startup systems as claimed in claim 13, wherein this switch element is 1 the tenth transistor, and is a P type CMOS (Complementary Metal Oxide Semiconductor).

18. high voltage startup systems as claimed in claim 17, wherein this voltage regulator comprises:

One second resistance, the first end of this second resistance connects the second end of this high voltage transistor, and the second end of this second resistance is connected to the control end of the tenth transistor;

The 11 transistor, the first end of the 11 transistor is connected to the second end of this second resistance, the second end ground connection of the 11 transistor; And

One second inverter, the first end of this second inverter is connected to this controller, and the second end of this second inverter is connected to the control end of the 11 transistor, and the second end of this second inverter is connected to the control end of the 5th transistor.