30results about How to "Suppress abnormal fluctuations" patented technology

The invention discloses an automatic alternating current voltage-stabilized power supply based on a voltage detection circuit. The automatic alternating current voltage-stabilized power supply is characterized by being mainly composed of a voltage regulator T, a diode rectifier U1, a servo motor M, a polar capacitor C5, a polar capacitor C1, a diode D1, a polar capacitor C3, a constant voltage output circuit, a trigger protection circuit respectively connected with an anode output terminal and a cathode output terminal of the diode rectifier U1 and a cathode of the polar capacitor C3, and a voltage detection circuit connected with the constant voltage output circuit. The automatic alternating current voltage-stabilized power supply can eliminate or suppress the instant high voltage of an input voltage, so that the input voltage is automatically stabilized in a given voltage range; meanwhile, when the input voltage is changed in a range of 160-260V, an output voltage can be stabilized within 220+ / -2V, so that the stability of the output voltage of the automatic alternating current voltage-stabilized power supply disclosed by the invention is improved.

The invention discloses a multi-circuit processing type LED constant current driving power supply which is characterized in that the multi-circuit processing type LED constant current driving power supply is mainly composed of a control chip U2, a diode rectifier U1, a triode VT1, a triode VT2, a polar capacitor C1, a polar capacitor C5, a diode D5, an overvoltage protection circuit, a surge voltage suppression circuit, a field effect constant current driving circuit and a current detection circuit which is connected in series between the DRV pin of the control chip U2 and the field effect constant current driving circuit. Transient high voltage of input voltage can be eliminated or suppressed, the voltage withstanding performance of voltage can be enhanced and middle null offset of current can be controlled so that output of stable voltage and current can be ensured, the stability of LED lamp brightness can be effectively ensured and the service life of the LED lamp can be effectively prolonged.

The invention discloses a power supply for a face detection system based on a triode voltage stabilizing circuit, which is characterized in that it mainly consists of a control chip U2, a diode rectifier U1, a field effect transistor MOS1, a triode VT1, a diode D1, a polar capacitor C1, and a polarity capacitor C1. polarity capacitor C4, diode D4, polarity capacitor C5, voltage detection circuit, triode voltage regulator circuit connected in series between the negative output terminal of diode rectifier U1 and the voltage detection circuit, and the anode and field effect of polarity capacitor C5 respectively The drain of the transistor MOS1 and the base constant current drive circuit connected to the FB pin of the control chip U2. The present invention can effectively reduce the leakage current and loss current of the input current, and can suppress the abnormal fluctuation of the input current, so that the input current remains stable, thereby improving the stability of the output voltage and current of the present invention, and effectively improving the The detection accuracy of the detection system.

The invention discloses a current detection circuit-based comparative amplification type power supply for an LED lamp band. The power supply is characterized by mainly consisting of a control chip U2, a diode rectifier U1, a transformer T, a triode VT1, a voltage stabilizing diode D9, a voltage regulation circuit, a constant-voltage constant-current driving circuit, a comparative amplification circuit, a current detection circuit serially connected between an OUT pin of the control chip U2 and the constant-voltage constant-current driving circuit, and the like. According to the power supply, high transient states of input voltage and current can be adjusted, so that frequency point shift of the current is prevented, and the voltage and the current are kept stable; and moreover, output voltage and circuit can be subjected to overvoltage and overcurrent regulation, and a surge on-state voltage in the output voltage and a surge on-state current in an output current can be suppressed, so that the intensity of the output voltage and current is increased by more than 40%, and the loading capacity of the power supply is effectively increased.

The invention discloses an electrodeless fluorescent lamp voltage stabilization constant current power source based on a source electrode amplification circuit. The electrodeless fluorescent lamp voltage stabilization constant current power source is characterized by mainly comprising a transformer T1, a diode rectifier U, a pulse transformation circuit, a polar capacitor C1, a voltage stabilization diode D1, the source electrode amplification circuit connected with a negative electrode output end of the diode rectifier U, a voltage detection circuit connected in series between a positive output end of the diode rectifier U and the source electrode amplification circuit, a buffer triggering circuit connected in series between the source electrode amplification circuit and the pulse transformation circuit, and a voltage-controlled oscillation circuit connected in series between the source electrode amplification circuit and the buffer triggering circuit. According to the power source, a voltage is modulated into a high frequency pulse width voltage, an output pulse peak value is kept to be stable through transformation of the pulse transformer, an output voltage is made to be consistent with a rated start voltage of an electrodeless fluorescent lamp, and stable voltage output is guaranteed.

The invention discloses an automatic alternating current voltage-stabilizing power supply with a stable performance. The automatic alternating current voltage-stabilizing power supply is characterized by mainly comprising a voltage regulator T, a diode rectifier U1, a servo motor M, a polar capacitor C5, a polar capacitor C1, a diode D1, a polar capacitor C3, a voltage-stabilizing output circuit, a trigger protection circuit, a surge current limiting circuit which is connected between the negative electrode output end of the diode rectifier U1 and the trigger protection circuit in series, and a voltage detection circuit which is connected with the voltage-stabilizing output circuit. By adoption of the automatic alternating current voltage-stabilizing power supply, the instantaneous high voltage of the input voltage can be eliminated or suppressed, so that the input voltage can be automatically stabilized within a given voltage range; and in addition, when the input voltage changes within a range of 160-260V, the output voltage can be stabilized within 220V plus or minus 2V, thereby improving the stability of the output voltage of the automatic alternating current voltage-stabilizing power supply.

The invention discloses an aerator-used adjustable power supply based on a thyristor over current protection circuit, which is characterized by mainly comprises a control chip U2, a transformer T, a diode rectifier U1, a polar capacitor C1, a polar capacitor C2, a polar capacitor C6, a resistor R12, a diode D6, a polar capacitor C8, a voltage detection circuit, a voltage controlled oscillation circuit and the thyristor over current protection circuit serially connected between the positive output end of the diode rectifier U1 and the voltage controlled oscillation circuit. The leakage current and the loss current of the input current can be effectively reduced, abnormal fluctuations of the input current can be restrained, and the input current can be kept stable; and in addition, the current intensity of the output current can be adjusted, stability of the output voltage and the current is ensured, and the stability of the electromagnetic oscillation frequency of the aerator can be ensured effectively.

The invention provides an inverter system based on a three-terminal integrated voltage stabilizing circuit. The system mainly consists of an inverter chip U1, a transformer T, a triode VT1, a polar capacitor C2, a polar capacitor C19, a polar capacitor C18, a resistor R14, a three-terminal integrated voltage stabilizing circuit, a comparative amplification circuit, a voltage detection circuit and a voltage-controlled oscillation circuit connected with a C1 pin and an E1 pin of the inverter chip U1 and the transformer T. The system can improve the voltage resistance and widen the dynamic range of post-inversion voltages and control the intermediate null offset of post-inversion voltage currents within 0.5nA, thereby guaranteeing the stability of alternating voltages output thereby. The system can also reduce leakage currents and loss currents of voltage currents in inversion and restrain exceptional fluctuations of output currents, so that the load capacity of the system is improved and is 80-95% of a rated load.

The invention discloses a pulse width adjustable type inversion system based on an overvoltage protection circuit. The pulse width adjustable type inversion system mainly consists of an inverter chip U, a transformer T, a transistor VT1, a polar capacitor C2, a polar capacitor C19, a polar capacitor C18, a resistor R14, a pulse width modulation circuit, a comparison amplifier circuit, a voltage detection circuit, a voltage controlled oscillation circuit, and the overvoltage protection circuit connected in series between the voltage controlled oscillation circuit and the negative electrode of the polar capacitor C18. The pulse width adjustable type inversion system can increase the voltage withstand capability and dynamic range after inversion, and can control the voltage current intermediate zero point deviation after inversion within 0.5nA, so as to ensure the stability of the AC voltage outputted by the pulse width adjustable type inversion system. The pulse width adjustable type inversion system can reduce the leakage current and loss current of the voltage current during inversion and can restrain the abnormal fluctuation of output current so as to increase the load capacity of the pulse width adjustable type inversion system, that is, the load capacity of the pulse width adjustable type inversion system reaches 80 to 95 percent of the rated load.

The invention discloses an offset adjustment current circuit-based adjustable power supply for an aerator. The adjustable power supply is characterized by mainly comprising a control chip U2, a transformer T, a diode rectifier U1, a polar capacitor C1, a polar capacitor C2, a polar capacitor C6, a resistor R12, a diode D6, a polar capacitor C8, a voltage detection circuit, a voltage-controlled oscillation circuit and an offset adjustment current circuit, wherein the offset adjustment current circuit is connected between an OUT pin of the control chip U2 and the voltage-controlled oscillation circuit in series. By the offset adjustment current circuit-based adjustable power supply, leakage current and loss current of input current can be effectively reduced, abnormal fluctuation of the input current can be inhibited and the input current is kept stable. Furthermore, the current intensity of output current can also be adjusted, so that the stability of output voltage and current is ensured and the stability of the electromagnetic oscillation frequency of the aerator is effectively ensured.

The invention discloses a multi-circuit processing type inversion system. The multi-circuit processing type inversion system is characterized by mainly comprising an inversion chip U1, a transformer T, a triode VT1, a polar capacitor C2, a polar capacitor C19, a polar capacitor C18, a resistor R14, a three-terminal integrated voltage-stabilizing circuit, a comparison amplification circuit, a voltage detection circuit, a voltage-controlled oscillation circuit and an overvoltage protection circuit. By adoption of the multi-circuit processing type inversion system, the voltage resistance and the dynamic range of the inverted voltage can be improved; in addition, the intermediate zero offset of the inverted voltage and current can be controlled to be within 0.5nA, thereby ensuring the stability of the alternating voltage output by the multi-circuit processing type inversion system; and in addition, the leakage current and the loss current of the voltage and the current in inversion can also be lowered, and the abnormal fluctuation of the output current can also be suppressed, thereby improving the load capacity of the multi-circuit processing type inversion system, namely the load capacity of the multi-circuit processing type inversion system is 80-95% of a rated load.

The invention discloses a pulse-adjusting type driving power supply for a cruise system based on the diversified self-sensing technology. The pulse-adjusting type driving power supply is formed by an adjusting chip U2, a diode rectifier U1, a triode VT1, a triode VT2, a polarity capacitor C3, a diode D2, a pulse adjusting circuit, a voltage detection circuit, a constant current driving circuit, and a micro-processing circuit connected between a collector electrode of the triode VT1 and the constant current driving circuit in series. According to the pulse-adjusting type driving power supply, the leakage current and the loss current of the output current can be effectively reduced, magnetic biasing of the output voltage due to imbalanced driving waveforms can be suppressed or eliminated, the output driving voltage and the reference voltage are kept consistent, the output voltage is more stable and more accurate, and the pulse-adjusting type driving power supply can output stable voltage and current.

The invention discloses a three-end integrated voltage-stabilized inverter system based on a pulse width modulation circuit. The three-end integrated voltage-stabilized inverter system is characterized in that the three-end integrated voltage-stabilized inverter system is mainly composed of an inverter chip U1, a transformer T, a triode VT1, a polar capacitor C2, a polar capacitor C19, a polar capacitor C18, a resistor R14, a three-end integrated voltage stabilizing circuit, a voltage detecting circuit, a pulse width modulating circuit and a voltage-controlled oscillation circuit. The three-end integrated voltage-stabilized inverter system can improve voltage resistance and dynamic range after inversion and furthermore can control intermediate zero offset of voltage current after inversion within 0.5 nA, thereby ensuring high stability of output AC voltage. Furthermore the three-end integrated voltage-stabilized inverter system can reduce leakage current and loss current of the voltage current in inversion and furthermore can suppress abnormal fluctuation of the output current, thereby improving loading capability of the system, namely the loading capability is 80-95% of a rated load.

The invention discloses an offset adjustment current circuit-based adjustable power supply for an over-current protection aerator. The adjustable power supply is characterized by mainly comprising a control chip U2, a transformer T, a diode rectifier U1, a polar capacitor C1, a polar capacitor C2, a polar capacitor C6, a resistor R12, a diode D6, a polar capacitor C8, a voltage detection circuit, a voltage-controlled oscillation circuit, a thyristor overcurrent protection circuit and an offset adjustment current circuit. By the offset adjustment current circuit-based adjustable power supply, leakage current and loss current of input current can be effectively reduced, abnormal fluctuation of the input current can be inhibited and the input current is kept stable. Furthermore, the current intensity of output current can also be adjusted, so that the stability of output voltage and current is ensured and the stability of the electromagnetic oscillation frequency of the aerator is effectively ensured.

The invention discloses a power supply for a face detection system, which is characterized in that it mainly consists of a control chip U2, a diode rectifier U1, a field effect transistor MOS1, a triode VT1, a diode D1, a polar capacitor C1, a polar capacitor C4, and a diode D4 , a polar capacitor C5, a voltage detection circuit connected to the VDD-pin of the control chip U2, the negative output terminal of the diode rectifier U1, and the emitter of the triode VT1, respectively, and the positive electrode of the polar capacitor C5 and the field effect transistor The drain of MOS1 is composed of a base constant current drive circuit connected to the FB pin of the control chip U2. The present invention can effectively reduce the leakage current and loss current of the input current, and can suppress the abnormal fluctuation of the input current, so that the input current remains stable, thereby improving the stability of the output voltage and current of the present invention, and effectively improving the The detection accuracy of the detection system.

The invention discloses an electrodeless fluorescent lamp voltage stabilization constant current power source based on a voltage detection circuit. The electrodeless fluorescent lamp voltage stabilization constant current power source is characterized by mainly comprising a transformer T1, a diode rectifier U, a pulse transformation circuit, a polar capacitor C1, a voltage stabilization diode D1, a source electrode amplification circuit connected with a negative electrode output end of the diode rectifier U, a voltage detection circuit connected in series between a positive electrode output end of the diode rectifier U and the source electrode amplification circuit, and a buffer triggering circuit connected in series between the source electrode amplification circuit and the pulse transformation circuit. According to the power source, a voltage is modulated into a high frequency pulse width voltage, an output pulse peak value is kept to be stable through transformation of the pulse transformer, an output voltage is made to be consistent with a rated start voltage of an electrodeless fluorescent lamp, and stable voltage output is guaranteed.

The invention discloses a three-terminal voltage-stabilizing inverter power supply used for charging and based on a voltage detection circuit. The three-terminal voltage-stabilizing inverter power supply is mainly formed by a control chip U2, a transformer T, a diode rectifier U1, a bidirectional switch S, a storage battery J, a polar capacitor C1, a polar capacitor C13, a polar capacitor C12, a polar capacitor C11, a voltage detection circuit, a three-terminal voltage stabilizing circuit, a boost adjusting circuit and a nonlinear amplifying circuit and the like. The boost adjusting circuit is connected with a CHRG1 pin, a CHRG2 pin and a PROG pin of the control chip U2, and the nonlinear amplifying circuit is connected with the boost adjusting circuit, a a contact of the bidirectional switch S and a primary side inductance coil of the transformer T. The three-terminal voltage-stabilizing inverter power supply used for charging and based on the voltage detection circuit can eliminate or restrain interference surge in the output current, the ability of the three-terminal voltage-stabilizing inverter power supply to restrain the pulsation of the output current can be effectively improved, and the output current can keeps stable.

The invention discloses a soft start and current stabilization circuit based on a voltage adjustment circuit, which is characterized in that: it mainly consists of a transformer T, a diode rectifier U, a triode VT4, a capacitor C1, a capacitor C4, a capacitor C5, a capacitor C6, a resistor R6, and a resistor R7 , Resistor R8, soft start circuit, voltage adjustment circuit and delay circuit. The present invention can realize the soft start of the electronic product, so that the output voltage of the present invention will rise to a given value at a slower speed through a start-up process after the power is turned on, so as to protect the electronic product from the impact of the surge when starting ; When starting, the present invention can also guarantee the optimal delay time of about 30 seconds; it is suitable for popularization and application.

The invention discloses a charging voltage detection type inverter power supply based on an overvoltage protection circuit, which is characterized in that it mainly consists of a control chip U2, a transformer T, a diode rectifier U1, a bidirectional switch S, a storage battery J, and a bidirectional switch S. The overvoltage protection circuit connected to the b contact, the polar capacitor C1, the polar capacitor C13, the polar capacitor C12, the polar capacitor C11, and the voltage detection circuit are respectively connected to the CHRG1 pin, CHRG2 pin and PROG of the control chip U2 It is composed of a step-up adjustment circuit connected to the pins, and a non-linear amplifier circuit connected with the step-up adjustment circuit and the a contact of the bidirectional switch S and the inductance coil of the primary side of the transformer T respectively. The invention can eliminate or suppress the interference surge in the output current, effectively improve the ability of the invention to suppress the pulsation of the output current, and keep the output current stable.

The invention discloses a high-stability type driving power supply for a cruise system based on a multielement self-sensing technology. The high-stability type driving power supply mainly comprises a regulation chip U2, a diode rectifier U1, a triode VT1, a triode VT2, a polar capacitor C3, a diode D2, a pulse adjustment circuit, a voltage detection circuit, a constant current driving circuit, a comparison amplifying circuit, a micro-processing circuit and the like, wherein the comparison amplifying circuit is connected between a CS pin and a VM pin of the regulation chip U2 in series; and the micro-processing circuit is connected between the collector electrode of the triode VT1 and the constant current driving circuit in series. By adoption of the high-stability type driving power supply, the leakage current and loss current of the output current can be effectively lowered; magnetic biasing generated by imbalanced driving waveform of the output voltage can be suppressed or eliminated; the output driving voltage and a reference voltage can be kept consistent; and the output voltage can be more stable and accurate, so that it is ensured that the high-stability type driving power supply can output stable voltage and current.

The invention discloses an LED adjustable voltage-regulated driving power supply based on a three-terminal voltage regulator circuit. The LED adjustable voltage-regulated driving power supply is characterized by mainly comprising a transformer T, a diode rectifier U1, a diode rectifier U2, a one-way thyristor VS, a voltage regulator diode D1, a polar capacitor C5, a base trigger circuit, a corrugated peak suppression circuit, a three-terminal voltage regulator circuit connected with the cathode of the one-way thyristor VS and the negative output end of the diode rectifier U2, and a voltage detection circuit connected in series between the base trigger circuit and the three-terminal voltage regulator circuit. A voltage regulator chip U3 adopted in the invention is an LM317 integrated chip, and the chip and a peripheral circuit are combined to realize suspended power supply. Moreover, voltage pre-adjustment can be realized through the thyristor, 6-12V adjustable voltage can be output, and thus, output of a wide-range adjustable voltage is ensured.

The invention discloses an LED adjustable voltage-regulated driving power supply based on a voltage detection circuit. The LED adjustable voltage-regulated driving power supply is characterized by mainly comprising a transformer T, a diode rectifier U1, a diode rectifier U2, a one-way thyristor VS, a voltage regulator diode D1, a polar capacitor C5, a base trigger circuit, a three-terminal voltage regulator circuit connected with the cathode of the one-way thyristor VS and the negative output end of the diode rectifier U2, and a voltage detection circuit connected in series between the base trigger circuit and the three-terminal voltage regulator circuit. A voltage regulator chip U3 adopted in the invention is an LM317 integrated chip, and the chip and a peripheral circuit are combined to realize suspended power supply. Moreover, voltage pre-adjustment can be realized through the thyristor, 6-12V adjustable voltage can be output, and thus, output of a wide-range adjustable voltage is ensured.

The invention discloses a refrigerator power socket voltage detection filter protection circuit, which is characterized in that it mainly consists of a front constant current source circuit, triodes VT1-VT4, operational amplifier P1, light emitting diode VD, bidirectional thyristor VS, fuse FU , Resistors R1 ~ R10, capacitors C1 ~ C8, diodes D1 ~ D5 and Zener diode D6. The present invention does not need to use complex and costly electronic components such as transformers and integrated chips, so that the structure of the present invention is relatively simple, which can facilitate inspection and maintenance, and can reduce costs; at the same time, it can also avoid sudden power failure and power on immediately start compression The machine will damage the compressor, which is suitable for popularization and application.

The invention discloses an LED adjustable voltage-regulated driving power supply based on a base trigger circuit. The LED adjustable voltage-regulated driving power supply is characterized by mainly comprising a transformer T, a diode rectifier U1, a diode rectifier U2, a one-way thyristor VS, a voltage regulator diode D1, a polar capacitor C5, a base trigger circuit, a three-terminal voltage regulator circuit, a voltage detection circuit connected in series between the base trigger circuit and the three-terminal voltage regulator circuit, and an overvoltage protection circuit connected in series between the negative output end of the diode rectifier U2 and the three-terminal voltage regulator circuit. A voltage regulator chip U3 adopted in the invention is an LM317 integrated chip, and the chip and a peripheral circuit are combined to realize suspended power supply. Moreover, voltage pre-adjustment can be realized through the thyristor, 6-12V adjustable voltage can be output, and thus, output of a wide-range adjustable voltage is ensured.

The invention discloses a ripple peak suppression type low loss portable switch power supply. The switch power supply is characterized in that the switch power supply is composed of a control chip U2, a transformer T1, a transformer T2, a diode rectifier U1, a fly-back converting circuit, a ripple peak suppression circuit which is in series connection to a cathode output end of the diode rectifier U1 and a VC base pin anode of the control chip U2, and a high impedance voltage following circuit which is in separate connection to a dotted terminal and a non-dotted terminal of a secondary side inductance coil of the transformer T2. According to the invention, the switch power supply can effectively reduce current conductance loss and current loss caused by the circuit, and the switch power supply can also regulate pulse width, and effectively avoid the intensity of the magnetism of a magnetic assembly, so that effective reduction of current loss can be guaranteed and the stability of output current can be effectively increased.

The invention discloses a multi-circuit-processing type energy-saving light control system for a large outdoor LED display screen. The multi-circuit-processing type energy-saving light control system is characterized by mainly comprising a control chip U1, a bright sensor RL, a triode VT1, a diode D1, a polar capacitor C1, a signal level regulating circuit, a voltage-multiplying regulating circuit, a self-oscillating circuit, a delay switch circuit and a buffer protecting circuit connected with the delay switch circuit. The multi-circuit-processing type energy-saving light control system has the advantages that interference signals in signals output by the bright sensor RL can be inhibited or eliminated to allow the level of input signals to keep stable, leaked currents and lost currents can be reduced effectively, the abnormal fluctuations of the currents can be inhibited to allow the pulsation of the output currents to keep stable, the signal processing accuracy of the system is increased effectively, and the stability of the output voltage and currents of the system is increased.

The invention discloses a multielement self-sensing technology-based driving power supply for a cruise system. The multielement self-sensing technology-based driving power supply mainly comprises a regulation chip U2, a diode rectifier U1, a triode VT1, a triode VT2, a polar capacitor C3, a diode D2, a voltage detection circuit, a constant-current driving circuit, a micro-processing circuit which is connected between the collector electrode of the triode VT1 and the constant-current driving circuit, and the like. By adoption of the multielement self-sensing technology-based driving power supply, the leakage current and loss current of the output current can be effectively reduced; and bias magnet generated by an output voltage due to imbalanced driving wave can be suppressed or eliminated, so that the output driving voltage and a reference voltage can be kept consistent, and the output voltage can be more stable and accurate, thereby ensuring that the multielement self-sensing technology-based driving power supply can output stable voltage and current.

The invention discloses an inversion system with stable performance. The inversion system is characterized in that the inversion system is mainly composed of an inversion chip U, a transformer T, a triode VT1, a polar capacitor C2, a polar capacitor C19, a polar capacitor C18, a resistor R14, a comparison and amplification circuit, a voltage detection circuit and a voltage controlled oscillation circuit, wherein the voltage controlled oscillation circuit is connected with the C1 pin and E1 pin of the inversion chip U and the transformer. According to the inversion system of the invention adopted, the voltage withstanding performance and the dynamic range of inverted voltage can be improved, intermediate zero point deviation of inverted voltage and current can be controlled within 0.5nA, and therefore, the stability of alternating-current voltage outputted by the inversion system of the invention can be ensured; current leakage current and current loss of voltage and current in inversion can be decreased, and the abnormal fluctuation of output current can be suppressed, and therefore, the load capacity of the inversion system can be improved, and the load capacity of the inversion system is 80 to 95% of rated load.

The invention discloses a multi-element self-sensing technology-based ripple suppression type driving power supply for a cruise system. the driving power supply mainly comprises an adjustment chip U2, a diode rectifier U1, a triode VT1, a triode VT2, a polar capacitor C3, a diode D2, a voltage detection circuit, a constant-current driving circuit, a ripple suppression circuit connected between the negative output end of the diode rectifier U1 and the voltage detection circuit in series, a micro-processing circuit connected between the collector electrode of the triode VT1 and the constant-current driving circuit in series, and the like. According to the technical scheme of the invention, the leakage current and the loss current of the output current can be effectively reduced. Meanwhile, the magnetic biasing phenomenon, generated due to the unbalanced driving waveform of an output voltage, can be inhibited or even eliminated, so that the output driving voltage is kept consistent with a reference voltage. Therefore, the output voltage is more stable and more accurate. As a result, the output voltage and the output current are ensured to be stable.