Ultra-high voltage non-inductor voltage regulator chip combined with thyristor integrated module

Abstract

The invention discloses an integrated module of an ultra-high voltage non-inductor voltage stabilizing chip combined with a thyristor. The module utilizes an external half-wave rectifier diode to rectify alternating current into a pulse current of the same phase. In each pulse of the same phase, power supply is performed only in a very short time and in a low-voltage area. The chip utilizes the internal synchronous zero-position detection clamp of the alternating current to implement low-frequency synchronous oscillation power supply with the alternating current at a low voltage. The low-frequency non-continuous pulse in the chip is then used to dynamically charge an external energy storage capacitor to maintain a constant voltage and current power supply capability. The chip is then combined with a plurality of thyristors to become a buck drive integrated module dedicated to household appliances. The module has the advantages of small size, no EMI / EMC interference, no heat generation, and low cost.

Description

Technical Field

[0001] The invention relates to an integrated module, in particular to an integrated module of an ultra-high voltage non-inductor voltage stabilizing chip combined with a thyristor. Background Art

[0002] According to traditional circuit design, when converting AC power into DC power, the method often used is as follows:

[0003] a. Transformer step-down method:

[0004] Advantages: high cost, no EMI / EMC issues, large output current.

[0005] Disadvantages: heavy weight, large size, low efficiency, heating of silicon steel sheet does not meet EU ERP standards.

[0006] b. Switching power supply voltage reduction method:

[0007] Advantages: small size, light weight, high efficiency, and large output current.

[0008] Disadvantages: There are EMI / EMC issues, the cost is moderate, there are many peripheral components, and the MOS tube generates heat.

[0009] c. Resistive step-down method:

[0010] Advantages: small size and light weight, no EMI / EMC issues, low cost.

[0011] Disadvantages: low efficiency, small output current, severe heating of resistors, and does not meet EU ERP standards.

[0012] d. Resistor-capacitor voltage reduction method:

[0013] Advantages: Lightweight, no EMI / EMC issues, moderate cost.

[0014] Disadvantages: large size, low efficiency, capacitor life is easily affected by aging and temperature, does not meet EU ERP standards, and current limiting resistors are prone to breakdown and burning.

[0015] Among the above methods of converting AC power into DC power, the RC step-down method is currently the most commonly used method. Figure 1As shown, it is a circuit diagram of using a RC step-down as a thyristor power source. The input end of the circuit includes an AC power source 1, which is connected in series and parallel with a resistor 2 and a capacitor 3, so that the AC power source 1 limits its maximum current through the capacitor 3 and the resistor 2. In addition, a rectifier circuit composed of two diodes 4 is connected to rectify the AC current into a DC current, and then a regulated DC power source is output through a Zener diode 5 and an electrolytic capacitor 6 as the current of the gate DC trigger signal of a plurality of thyristors 7. Since the capacitor 3 is large in size, it causes trouble in assembly. In addition, the capacitor is easy to age, so it has a limited service life. As for the resistor 2, it is possible to be broken down and burned. In view of this, after observing the above-mentioned shortcomings, the inventor of the present case believes that the conventional RC step-down method needs to be further improved, and the present invention is produced accordingly. Summary of the invention

[0016] The main purpose of the present invention is to provide an ultra-high voltage non-inductor voltage stabilizing chip combined with a thyristor integrated module. Taking into account the shortcomings of the above-mentioned various voltage reduction methods, when extracting AC power from DC power, a chip with small size, moderate current extraction, no EMI / EMC interference, no heat generation, and low cost is designed as the primary design solution. This chip is then combined with a plurality of commonly used thyristors (TRIAC) to become a dedicated buck drive integrated module for home appliances, so that the present invention can provide thyristor switch control for all AC to DC power supply for various small home appliances, toys, etc.

[0017] The technical solution of the present invention is: an integrated module of an ultra-high voltage non-inductor voltage regulator chip combined with a thyristor, which is provided with at least two half-wave AC power output pins, a working voltage output pin, a DC voltage output terminal, a plurality of DC trigger signal input pins and a plurality of controlled AC power output pins. The integrated module includes:

[0018] A chip, the chip includes: an internal power supply circuit unit, which is connected to the input end of a half-wave AC power supply, and includes a first soft switch, a constant current source, and a startup circuit. When the chip is powered on, the current passes through the first soft switch and the constant current source to charge the energy storage capacitor outside the chip. When the upper limit reference voltage of the startup circuit is reached, the first soft switch closes the charging path for the external energy storage capacitor and provides the working voltage inside the chip; a capacitor charging circuit unit, which is connected to the input end of the AC power supply, and includes an AC detection clamp circuit and a second soft switch. When the AC detection clamp circuit detects the potential in the low-voltage working area, the second soft switch is turned on to continue charging the external energy storage capacitor with low-frequency discontinuous pulses;

[0019] There are a plurality of bidirectional thyristors, each of which has a main pole, a controlled main pole and a gate pole. The main pole of the bidirectional thyristor is connected to one of the half-wave AC power input pins of the integrated module, the controlled main pole of the bidirectional thyristor is connected to the external load end, and the gate pole of the bidirectional thyristor is connected to the control signal output end.

[0020] Furthermore, the half-wave AC current inputted to the half-wave AC power input terminal utilizes a diode to convert the full-wave AC current into a half-wave AC current.

[0021] Furthermore, the capacitor charging circuit unit further includes a third soft switch, one end of the third soft switch is connected to the first energy storage capacitor, and the other end is connected to a second energy storage capacitor. The energy of the first energy storage capacitor can be released to the second energy storage capacitor via the third soft switch to ensure sufficient energy supply to the load end.

[0022] Furthermore, the first soft switch, the second soft switch and the third soft switch are all metal oxide semiconductor field effect transistors.

[0023] Furthermore, the chip also includes an active discharge circuit unit, which is connected to the AC power input terminal. It uses an active discharge circuit to provide a current source discharge channel to ensure that the input energy can charge the external energy storage capacitor during the charging period.

[0024] Furthermore, the capacitor charging circuit unit is provided with an overheat protection circuit and an undervoltage and overvoltage protection circuit at the second soft switch.

[0025] Furthermore, the capacitor charging circuit unit is provided with an undervoltage and overvoltage protection circuit and an overcurrent limiting circuit at the third soft switch.

[0026] The ultra-high voltage non-inductor voltage stabilizing chip combined with the integrated module of thyristor provided by the present invention has the following beneficial effects: since no inductor is required and there is no EMI / EMC problem, it has the advantages of high safety, easy processing, cost saving, easy maintenance, reduced volume, etc., and can operate in ultra-high and wide voltages and can be used under unstable power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The circuit diagram of the prior art using a resistor-capacitor voltage reduction as a thyristor power supply;

[0028] Figure 2 This is an appearance diagram of the integrated module of the present invention;

[0029] Figure 3 The block diagram of the integrated module circuit of the chip combined with the thyristor of the present invention;

[0030] Figure 4A circuit block diagram of the chip of the present invention;

[0031] Figure 5 A circuit diagram of the integrated module of the present invention connected to a power source and a capacitor;

[0032] Figure 6 A schematic diagram showing the low voltage working area of ​​the present invention using a voltage waveform;

[0033] Figure 7 This is a schematic diagram of the integrated module of the present invention being connected to a load.

[0034] As shown in the figure: 1—AC power supply, 2—resistance, 3—capacitor, 4—diode, 5—Zener diode, 6—electrolytic capacitor, 7—thyristor, 100—integrated module, 101—half-wave AC power supply input pin, 102—working voltage output pin, 103—DC voltage output pin, 104—DC trigger signal input pin, 105—controlled AC power supply output pin, 10—chip, 11—internal power supply circuit unit, 111—first soft switch, 112—constant current source, 113—starting current, 114—starting current, 115—starting current, 116—starting current, 117—starting current, 118—starting current, 119—starting current, 120—starting current, 121—starting current, 122—starting current, 123—starting current, 124—starting current, 125—starting current, 126—starting current, 127—starting current, 128—starting current, 129—starting current, 130—starting current, 131—starting current, 132—starting current, 133—starting current, 134—starting current, 135—starting current, 136—starting current, 137—starting current, 138—starting current, 139—starting current, 140—starting current, 141—starting current, 142—starting current, 143—starting current, 144—starting current, 145—starting current, 146—starting current, 147—starting current, 148—starting current, 149—starting current, 150—starting current, 151—starting current 2—capacitor charging circuit unit, 121—AC detection clamping current, 122—second soft switch, 123—third soft switch, 124—overheat protection circuit, 125—undervoltage and overvoltage protection circuit, 126—undervoltage and overvoltage protection circuit, 127—overcurrent limiting circuit, 13—active discharge circuit unit, 20—thyristor, 200—AC current, 201—diode, 300—first energy storage capacitor, 400—second energy storage capacitor, 500—electric fan, 501—fan motor, 502—swing motor. DETAILED DESCRIPTION

[0035] In order to more intuitively and completely understand the technical solution of the present invention, a non-limiting feature description is now provided in conjunction with the accompanying drawings of the present invention as follows:

[0036] like Figure 2 As shown in FIG. 1 , which is an appearance diagram of the integrated module of the present invention, the integrated module 100 is provided with two half-wave AC power input pins 101, a working voltage output pin 102, a DC voltage output pin 103, a plurality of DC trigger signal input pins 104 and a plurality of controlled AC power output pins 105. Figure 3 As shown, it is a circuit diagram of an integrated module of a chip combined with a thyristor according to the present invention. The integrated module 100 includes a circuit formed by combining a chip 10 and a plurality of bidirectional thyristors 20; wherein:

[0037] The chip 10, such as Figure 4 FIG. 1 is a circuit block diagram of the chip of the present invention. The chip 10 further includes:

[0038] An internal power supply circuit unit 11, whose input end is connected to the half-wave AC power input pin 101 and whose output end is connected to the working voltage output pin 102, includes a first soft switch 111, a constant current source 112 and a starting current 113. The first soft switch 111 is a metal oxide semiconductor field effect transistor (MOSFET) and can provide the working voltage inside the chip 10.

[0039] A capacitor charging circuit unit 12 is connected to the half-wave AC power input pin 101, and includes an AC detection clamp circuit 121 and a second soft switch 122. The second soft switch 121 is also a metal oxide semiconductor field effect transistor (MOSFET). When the AC detection clamp circuit 121 detects the potential in the low voltage working area, the second soft switch 122 is turned on. The capacitor charging circuit unit 12 further includes a third soft switch 123. The third soft switch 123 is a metal oxide semiconductor field effect transistor (MOSFET). A field effect transistor (MOSFET), one end of the third soft switch 123 is connected to the second soft switch 122, and the other end is connected to the DC voltage output pin 103. In addition, an overheat protection circuit 124 and an undervoltage and overvoltage protection circuit 125 are provided at the second soft switch 122 of the capacitor charging circuit unit 12, and an undervoltage and overvoltage protection circuit 126 and an overcurrent limiting circuit 127 are provided at the third soft switch 123 of the capacitor charging circuit unit 12, so as to protect the capacitor charging circuit unit 12.

[0040] An active discharge circuit unit 13 is connected to the half-wave AC power input pin 101. Since there is a parasitic capacitance between the input end of the chip 10 and the ground, the input end voltage will be too high. Therefore, the active discharge circuit 13 is used to provide a current source discharge channel to ensure that the input energy can charge the external energy storage capacitor during the charging period.

[0041] Each bidirectional thyristor 20 has a main pole 21, a controlled main pole 22 and a gate 23. The main pole 21 of the bidirectional thyristor 20 is connected to one of the half-wave AC power input pins 101 of the integrated module 100, the controlled main pole 22 of the bidirectional thyristor 20 is respectively connected to the controlled AC power output pin 105 of the integrated module 100, and the gate 23 of the bidirectional thyristor 20 is respectively connected to the DC trigger signal input pin 104 of the integrated module 100.

[0042] When the present invention is used to convert AC power into DC power, the half-wave AC power input pin 101 of the integrated module 100 of the present invention is connected to an AC current 200 of the half-wave output. In this embodiment, the half-wave AC current inputted by the AC power input terminal uses a diode 201 to rectify the original full-wave AC current 200 into a positive-phase pulse current of the same phase. The working voltage output pin 102 of the integrated module 100 is connected in parallel with a first energy storage capacitor 300, and the DC voltage output pin 103 is connected in parallel with a second energy storage capacitor 400, wherein the first energy storage capacitor 300 and the second energy storage capacitor 400 are both electrolytic capacitors. Figure 5 As shown, it is a schematic diagram of the present invention showing its low-voltage working area with a voltage waveform. When the integrated module 100 is powered on, the current passes through the first soft switch 111 and the constant current source 112 to charge the first energy storage capacitor 300. When the upper limit reference voltage of the startup circuit 113 is reached, the first soft switch 111 closes the charging path for the first energy storage capacitor 300 and provides the working voltage inside the chip 10. When the AC detection clamp circuit 121 detects the potential in the low-voltage working area, the second soft switch 122 is turned on to continue charging the first energy storage capacitor 300 with a low-frequency discontinuous pulse wave, and the energy of the first energy storage capacitor 300 can be released to the second energy storage capacitor 400 through the third soft switch 123. The voltage of the second energy storage capacitor 400 is the voltage obtained at the output end of the power supply to ensure that the load end obtains sufficient energy supply.

[0043] When the chip of the present invention is combined with the integrated module of the thyristor to be used to control the load, such as Figure 7 As shown, it is a schematic diagram of the use of the integrated module of the present invention connected to a load. The integrated module 10 is connected to a load, which is an electric fan 500. The electric fan 500 includes a fan motor 501 and a swing motor 502. One end of the power supply line of the fan motor 501 and the swing motor 502 is connected to the AC power supply, and the other end is respectively connected to the controlled AC power supply output pin 105 of the integrated module 10. In addition, the switch and speed control circuit of the fan motor 501 and the swing motor 502 of the electric fan 500 are respectively connected to the signal input pin 104 of the integrated module 10. Thereby, the fan motor 501 and the swing motor 502 of the electric fan 500 can be sent to the gate terminal 23 of the thyristor 20 through the signal obtained by the DC trigger signal input pin 104 of the integrated module 10, thereby turning on or off the thyristor 20 to achieve the effect of controlling the fan motor 501 and the swing motor 502.

[0044] The features of the reinvention and the expected effects that can be achieved are stated as follows:

[0045] 1. The present invention utilizes an external half-wave rectifier diode to rectify the alternating current into a pulse current of the same phase. In each pulse of the same phase, the power supply is only implemented in a very short time and in a low-voltage area. The synchronous zero-position detection of the alternating current inside the chip is clamped at a low voltage to implement low-frequency synchronous oscillation power supply with the alternating current. The low-frequency discontinuous pulse in the chip is then used to dynamically charge the external energy storage capacitor to maintain a constant voltage and current power supply capability.

[0046] 2. Since the present invention utilizes an external half-wave rectifier diode to rectify the alternating current into a pulse current of the same phase, in each pulse of the same phase, the power supply operation is only carried out for a very short time and in a low-voltage area. Therefore, the present invention can operate under a power supply with an ultra-high and wide voltage, and can adapt to different voltages, or voltages with unstable power, and can solve the problem of use in countries with unstable power supply.

[0047] 3. Since the present invention does not use a switching power supply step-down method and does not require an inductor, it not only does not have EMI / EMC interference problems, but also has the advantages of high safety, easy processing, cost saving, easy maintenance, and reduced size.

[0048] 4. The present invention combines a chip with a plurality of thyristors to form a buck drive integrated module dedicated to household appliances, so it has the advantages of small size, low cost, and wide application range.

[0049] Of course, the above are only preferred embodiments of the present invention, and the patent scope of the present invention is not limited thereto. All simple modifications and equivalent structural changes made using the contents of the specification and drawings of the present invention should be included in the patent protection scope of the present invention.

Claims

1. An integrated module of an ultra-high voltage non-inductor voltage regulator chip combined with a thyristor, having at least two half-wave AC power output pins, one working voltage output pin, a DC voltage output terminal, a plurality of DC trigger signal input pins and a plurality of controlled AC power output pins, the integrated module includes: A chip, the chip includes: an internal power supply circuit unit, which is connected to the input end of a half-wave AC power supply, and includes a first soft switch, a constant current source, and a startup circuit. When the chip is powered on, the current passes through the first soft switch and the constant current source to charge the energy storage capacitor outside the chip. When the upper limit reference voltage of the startup circuit is reached, the first soft switch closes the charging path for the external energy storage capacitor and provides the working voltage inside the chip; a capacitor charging circuit unit, which is connected to the input end of the AC power supply, and includes an AC detection clamp circuit and a second soft switch. When the AC detection clamp circuit detects the potential in the low-voltage working area, the second soft switch is turned on to continue charging the external energy storage capacitor with low-frequency discontinuous pulses; A plurality of bidirectional thyristors, each of which has a main electrode, a controlled main electrode and a gate electrode, the main electrode of the bidirectional thyristor is connected to one of the half-wave AC power input pins of the integrated module, the controlled main electrode of the bidirectional thyristor is connected to the external load terminal, and the gate electrode of the bidirectional thyristor is connected to the control signal output terminal; The capacitor charging circuit unit further includes a third soft switch, one end of the third soft switch is connected to the first energy storage capacitor, and the other end is connected to a second energy storage capacitor. The energy of the first energy storage capacitor can be released to the second energy storage capacitor via the third soft switch to ensure sufficient energy supply to the load end; The chip also includes an active discharge circuit unit, which is connected to the AC power input terminal and uses an active discharge circuit to provide a current source discharge channel to ensure that the input energy can charge the external energy storage capacitor during the charging period; The capacitor charging circuit unit is provided with an overheat protection circuit and an undervoltage and overvoltage protection circuit at the second soft switch; The capacitor charging circuit unit is provided with an undervoltage and overvoltage protection circuit and an overcurrent limiting circuit at the third soft switch.

2. The integrated module of the ultra-high voltage non-inductor voltage stabilizing chip combined with a thyristor according to claim 1 is characterized in that: The half-wave AC current inputted to the input terminal of the half-wave AC power source utilizes a diode to convert the full-wave AC current into a half-wave AC current.

3. The integrated module of the ultra-high voltage non-inductor voltage stabilizing chip combined with a thyristor according to claim 1 is characterized in that: The first soft switch, the second soft switch and the third soft switch are all metal oxide semiconductor field effect transistors.

Images