CN211183772U

CN211183772U - NPN BJT type power supply controller based on multivibrator

Info

Publication number: CN211183772U
Application number: CN201921888366.1U
Authority: CN
Inventors: 周丹; 陈怡�; 谢路耀
Original assignee: Zhejiang University of Technology ZJUT
Current assignee: Zhejiang University of Technology ZJUT
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-08-04
Anticipated expiration: 2029-11-05

Abstract

An NPN BJT type power supply controller based on a multivibrator comprises a port Vcc, a port Vin, a port Vss and a port Out, and further comprises an NPN BJT transistor Q1, an NPN BJT transistor Q2, a capacitor C1, a capacitor C2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a diode D1, a diode D2, a controlled current source 1, a controlled current source 2 and an output unit. The power supply controller can be connected with a high-voltage side power semiconductor device in the power supply or connected with a low-voltage side power semiconductor device in the power supply, and the switching work period and the duty ratio of the power semiconductor device in the power supply can be directly influenced. The utility model discloses but self-excited operation, simple structure, do benefit to integrated, the reliability is high, the operating voltage scope is wide, is particularly suitable for higher input voltage's application scenario.

Description

NPN BJT type power supply controller based on multivibrator

Technical Field

The utility model relates to a power supply controller introduces controlled current source on multivibrator's basis, this power supply controller all can normally work in the operating voltage within range of broad, not only have the dual ability of adjusting operating frequency and duty cycle, but also have the ability of drive power semiconductor device, survey (L ow-Side) MOS pipe with the High voltage Side (High-Side) and low pressure in the power, IGBT pipe, the homoenergetic matches such as BJT pipe, be particularly suitable for higher input voltage's application scenario.

Background

Due to the market demand and standardization, most of the commercially available power controllers have an operating voltage range substantially in the range of several volts to several tens of volts. When the input voltage range of the power supply is inconsistent with the working voltage range of the power supply controller, an independent auxiliary power supply or a non-independent auxiliary power supply branch circuit is mostly adopted to supply power to the power supply controller, so that the normal work of the power supply controller is ensured. However, the independent auxiliary power supply and the dependent auxiliary power supply branch need to occupy a certain space, and at the same time, the loss increases and the reliability decreases, which adversely affects the miniaturization and high efficiency of the entire power supply.

For the refinement requirement of high input voltage, the power supply needs a power supply controller with a wide working voltage range, the working voltage range can cover the input voltage range of the power supply, and an independent auxiliary power supply and a non-independent auxiliary power supply branch circuit are not needed to supply power to the power supply. As shown in fig. 1, the NPN BJT type multivibrator has a relatively wide operating voltage range. It would be feasible to modify it to be a wide operating voltage range power supply controller.

Disclosure of Invention

For overcoming the limitation of the present most commercially available power supply controller operating voltage scope, the utility model provides a NPN BJT type power supply controller based on multivibrator, it has fairly wide operating voltage scope, adopts its power as the controller to have the advantage in the aspect of miniaturization and high efficiency.

The utility model provides a technical scheme that its technical problem adopted is:

an NPN BJT type power controller based on a multivibrator comprises a port Vcc, a port Vin, a port Vss and a port Out, and further comprises an NPN BJT transistor Q1, an NPN BJT transistor Q2, a capacitor C1, a capacitor C2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a diode D1, a diode D2, a controlled current source 1, a controlled current source 2 and an output unit, wherein the output unit comprises a port a and a port b, one end of the resistor R1 is simultaneously connected with one end of the resistor R2, one end of the resistor R3 and the port Vcc, the other end of the resistor R1 is simultaneously connected with a collector of the NPN BJT transistor Q1, one end of the capacitor C1 and a of the output unit, a base of the NPN BJT transistor Q1 is simultaneously connected with a cathode of the diode D1 and one end of the resistor R4, the other end of the base of the resistor R3 is simultaneously connected with a collector of the BJT transistor BJT Q2 and one end of the collector of the capacitor C2, the other end of the resistor R2 is connected with the first port of the controlled current source 1, the other port of the capacitor C1 and the other port of the resistor R5 at the same time, the first port of the controlled current source 2 is connected with the port Vin, the second port of the controlled current source 2 is connected with the other end of the resistor R4 and the other end of the capacitor C2 at the same time, the emitter of the NPN BJT transistor Q1 is connected with the second port of the controlled current source 1, the cathode of the diode D1, the cathode of the diode D2, the emitter of the NPN BJT transistor Q2 and the port Vss at the same time, and the port b of the output unit is connected with the port Out;

the current is1 flowing into the first port of the controlled current source 1 affects the charging speed of the capacitor C1 when the NPN BJT Q1 is turned on and the discharging speed of the capacitor C1 when the NPN BJT Q2 is turned on, the larger is1>0 and is1, the longer is the on-time of the Q1 and the shorter is the on-time of the Q2, and further affects the control signal of the port a;

the current is2 flowing out of the second port of the controlled current source 2 affects the charging speed of the capacitor C2 when the NPN-type BJT Q2 is turned on and the discharging speed of the capacitor C2 when the Q1 is turned on, the larger is the is2 is greater than 0 and is2 is, the shorter the on-time of the Q2 is, the longer the on-time of the Q1 is, and further the control signal of the port a is affected;

the output unit converts the control signal of the port a into a driving signal of the port b, so that the power supply controller has the capability of driving the power semiconductor device;

the power supply controller controls the on-off state of a power semiconductor device in a power supply, the power supply provides necessary electric energy for the power supply controller, a port Vcc of the power supply controller is a positive end of a main power supply port, a port Vss of the power supply controller is a negative end of the main power supply port, a port Out of the power supply controller is connected with a control port of the power semiconductor device in the power supply, and a port Vin of the power supply controller is a power supply end of a controlled current source 2.

The power supply controller can be connected with a high-voltage side power semiconductor device in the power supply and can also be connected with a low-voltage side power semiconductor device in the power supply.

Further, the power supply composed of the power supply controller comprises a power main circuit and a control circuit taking the power supply controller as a core, wherein the power main circuit is any power electronic circuit (such as a Buck circuit, a Buck-Boost circuit, a Boost circuit and the like and derivatives thereof) comprising a high-voltage side power semiconductor device or a low-voltage side power semiconductor device.

Still further, as a preferred embodiment of the controlled current source 1, the controlled current source 1 further includes a port Control1 to a port Control, an NPN BJT Qsa1 to an NPN BJT Qsan, a regulator Zsa0, a resistor Rsa0 and an NPN BJT Qsa0, where n is a positive integer, a cathode of the regulator Zsa0 is connected to the port Vin of the power controller, an anode of the regulator Zsa0 is connected to one end of the resistor Rsa0, the other end of the resistor Rsa0 is connected to a base of the NPN BJT Qsa0, the port Control of the controlled current source 1 is connected to a base of the NPN BJT Qsaj, j has a value range of 1 to n, a collector of the NPN BJT Qsa0 and a collector of the NPN BJT Qsa1 to a collector of the NPN BJT Qsan are both connected to the first port of the controlled current source 1, an emitter of the NPN BJT Qsa0 and an emitter of the BJT Qsa1 are both connected to an emitter of the NPN BJT 1, the ports Control1 to Control are connected with detection signals in the power supply, and the detection signals comprise at least one of detection signals of inductive current, detection signals of capacitive current, detection signals of load current, detection signals of inductive voltage, detection signals of capacitive voltage, detection signals of load voltage and detection signals of input voltage; or the ports from Control1 to Control are connected with a digital-to-analog converter controlled by a programmable device, wherein the programmable device is a single chip, a DSP or an FPGA. The controlled current source 1 has the characteristic of power supply end voltage self-adaption, namely, the current is1 is related to the voltage of the port Vin.

As a preferable scheme of the controlled current source 2, the controlled current source 2 includes a voltage regulator Zsb1 and a resistor Rsb1, a cathode of the voltage regulator Zsb1 is connected to a first port of the controlled current source 2, an anode of the voltage regulator Zsb1 is connected to one end of the resistor Rsb1, and the other end of the resistor Rsb1 is connected to a second port of the controlled current source 2. The controlled current source 2 also has the characteristic of power supply terminal voltage adaptation, i.e. the current is2 is related to the voltage of the port Vin.

Furthermore, as a preferred embodiment of the output unit, the output unit further includes a port Vdd, and further includes an NPN BJT Qa1, a PNP BJT Qa2, a resistor Ra1, a diode Da1, a variable resistor, a capacitor Ca1, and a PNP BJT Qa3, wherein a collector of the NPN BJT Qa1 is connected to the port Vdd, a base of the NPN BJT Qa1 is simultaneously connected to one end of the resistor Ra1 and a base of the PNP BJT Qa2, another end of the resistor Ra1 is simultaneously connected to the port a of the output unit and a cathode of the diode Da1, an emitter of the BJT Qa1 is simultaneously connected to an anode of the diode Da1, an emitter of the PNP BJT Qa2, an emitter of the PNP BJT Qa3, one end of the capacitor Ca1, and a first port of the variable resistor, a second port of the variable resistor is simultaneously connected to an anode b of the output unit, another end of the capacitor Ca1, and a collector of the PNP BJT 39a 2, and the PNP collector controller of the PNP BJT 46a, the power supply provides necessary electric energy for the output unit, the port Vdd is a power supply end of the output unit, and the resistance value of the variable resistor is related to the voltage drop from the first port to the second port.

As a preferable scheme of the variable resistor, the variable resistor includes an NPN BJT transistor Qa4, an NPN BJT transistor Qa5, a resistor Ra2, and a resistor Ra3, one end of the resistor Ra2 is connected to a first port of the variable resistor, the other end of the resistor Ra2 is connected to a base of the NPN BJT transistor Qa4 and a collector of the NPN BJT transistor Qa5, a collector of the NPN BJT transistor Qa4 is connected to a port Vdd of the output unit, an emitter of the NPN BJT transistor Qa4 is connected to a base of the NPN BJT transistor Qa5 and one end of the resistor Ra3, and an emitter of the NPN BJT transistor Qa5 is connected to the other end of the resistor Ra3 and a second port of the variable resistor. The resistance value of the variable resistor increases with the increase of the voltage drop from the first port to the second port, and the characteristic is favorable for reducing the driving loss of the power semiconductor device under a wide working voltage range.

The output unit is matched with an N-channel MOS tube or an N-channel IGBT tube on the low-voltage side in the power supply. In the power supply, the low-voltage side power semiconductor device has one port which is always at a low level except for the control port, and the port is variably called a low-voltage side port, and the rest of the ports are called non-low-voltage side ports. Conventional Boost circuits have low side power semiconductor devices. The low-voltage side port of the low-voltage side N-channel MOS tube is a source electrode, the non-low-voltage side port is a drain electrode, and the control port is a grid electrode. The low-voltage side port of the low-voltage side N-channel IGBT tube is an emitting electrode, the non-low-voltage side port is a collecting electrode, and the control port is a grid electrode. The resistor Ra1 and the diode Da1 work together to improve the impedance matching between the output unit and the preceding stage. The capacitor Ca1 and the PNP BJT Qa3 cooperate to accelerate the switching speed of the low-side N-channel MOS transistor or N-channel IGBT transistor.

As another preferable scheme of the output unit, the output unit further includes a port Vdd, and further includes a NPN type BJT Qb1, a PNP type BJT Qb2, a resistor Rb1, a capacitor Cb1, a resistor Rb2, a diode Db1, a NPN type BJT Qb3, a resistor Rb3, a capacitor Cb 3 and a resistor Rb3, wherein a collector of the NPN type BJT Qb3 is connected to the port Vdd, a base of the NPN type BJT Qb3 is connected to a base of the PNP type BJT Qb3 and a port a of the output unit, the capacitor Cb 3 and the resistor Rb3 are connected in series, an emitter of the PNP type BJT Qb3 is connected to an emitter of the PNP type BJT Qb3, one end of the resistor Rb3 and one end of a serial branch of the capacitors Cb 3 and the resistor Rb3, the other end of the resistor Rb3 is connected to one end of the serial branch of the PNP type BJT Qb3 and the resistor Rb3, the other end of the resistor Cb 3 and the resistor Rb3, the resistor Cb 3 are connected to one end of the serial branch Cb 3, the resistor Cb 3 and the resistor Rb3, the other end of the resistor Rb3 is connected to the other end of the series branch of the capacitor Cb2 and the resistor Rb4 and the port b of the output unit, the emitter of the NPN BJT transistor Qb3 is connected to the anode of the diode Db1, the collector of the PNP BJT transistor Qb2 and the port Vss, the power supply provides necessary electric energy for the output unit, and the port Vdd is the power supply end of the output unit.

The output unit is matched with a PNP type BJT tube at the high voltage side in the power supply. In the power supply, except for the control port, the high-voltage side power semiconductor device has a port which is always at a high level, the port is called a high-voltage side port, and the rest of the ports are called non-high-voltage side ports. Conventional Buck circuits contain high side power semiconductor devices. The high-voltage side port of the high-voltage side PNP type BJT tube is an emitter, the non-high-voltage side port is a collector, and the control port is a base. The capacitor Cb1, the resistor Rb2 and the diode Db1 work together to accelerate the switching speed of the Qb3, and the capacitor Cb2 and the resistor Rb4 work together to accelerate the switching speed of the PNP BJT transistor at the high-voltage side.

The technical conception of the utility model is as follows: a controlled current source is introduced on the basis of an NPN BJT type multivibrator to construct a power supply controller with a wide working voltage range, and the current magnitude of the controlled current source directly influences the switching working period and the duty ratio of a power semiconductor device in a power supply. Meanwhile, the power supply controller is constructed to be suitable for any power electronic circuit including a low-voltage side power semiconductor device or a high-voltage side power semiconductor device.

The beneficial effects of the utility model are that: the power controller constructed can run by self-excitation, has simple structure, is beneficial to integration, has high reliability, and can have a working voltage range of several volts to hundreds of volts or more. When the working voltage range can cover the input voltage range of the power supply, the independent auxiliary power supply or the non-independent auxiliary power supply branch can be cancelled, so that the formed power supply has the advantages of miniaturization and high efficiency.

Drawings

Fig. 1 is a circuit diagram of a typical NPN BJT type multivibrator.

Fig. 2 is a circuit diagram of an output unit scheme according to the present invention.

Fig. 3 is a circuit diagram of another embodiment of the present invention.

Fig. 4 is a partial circuit diagram (output unit omitted) of the present invention using a controlled current source 1 scheme.

Fig. 5 is a partial circuit diagram (output unit omitted) of the present invention using a controlled current source 2 scheme.

Fig. 6 is a circuit diagram adopted in embodiment 1 of the present invention.

Fig. 7 is a comparison graph (start-up phase) of the control signal va of the embodiment 1 of the present invention at the lowest input voltage and the highest input voltage in the open loop control.

Fig. 8 is a comparison graph (steady state phase) of the control signal va of the embodiment 1 of the present invention at the lowest input voltage and the highest input voltage under the control closed loop condition.

Fig. 9 is a simulation waveform diagram of embodiment 1 of the present invention at the lowest input voltage.

Fig. 10 is a simulated waveform diagram of embodiment 1 of the present invention at the highest input voltage.

Fig. 11 is a circuit diagram adopted in embodiment 2 of the present invention.

Fig. 12 is a simulation waveform diagram of embodiment 2 of the present invention at the lowest input voltage.

Fig. 13 is a simulation waveform diagram (partial detail) of embodiment 2 of the present invention at the lowest input voltage.

Fig. 14 is a simulation waveform diagram of embodiment 2 of the present invention at the time of the highest input voltage.

Fig. 15 is a simulation waveform diagram (partial detail) of embodiment 2 of the present invention at the highest input voltage.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Example 1

Referring to fig. 2, 4 and 5, a multivibrator-based NPN BJT type power controller includes a port Vcc, a port Vin, a port Vss and a port Out, and further includes an NPN BJT Q1, an NPN BJT Q2, a capacitor C1, a capacitor C2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a diode D1, a diode D2, a controlled current source 1, a controlled current source 2 and an output unit, the output unit includes a port a and a port b, one end of the resistor R1 is simultaneously connected to one end of the resistor R2, one end of the resistor R3 and the port Vcc, the other end of the resistor R1 is simultaneously connected to a collector of the NPN BJT Q1, one end of the capacitor C5 and a of the output unit, a base of the NPN BJT Q1 is simultaneously connected to a cathode of the diode D1 and one end of the resistor R4, and one end of the collector 639 of the BJT Q4, the base of an NPN BJT Q2 is simultaneously connected with one end of a resistor R5 and the cathode of a diode D2, the other end of the resistor R2 is simultaneously connected with a first port of a controlled current source 1, the other port of a capacitor C1 and the other port of a resistor R5, the first port of the controlled current source 2 is connected with a port Vin, the second port of the controlled current source 2 is simultaneously connected with the other end of a resistor R4 and the other end of a capacitor C2, the emitter of the NPN BJT Q1 is simultaneously connected with the second port of the controlled current source 1, the cathode of a diode D1, the cathode of a diode D2, the emitter of a BJT Q2 and a port Vss, and the port b of the output unit is connected with a port Out.

The controlled current source 1 further comprises a port Control1 to a port Control, an NPN BJT Qsa1 to an NPN BJT Qsan, a regulator Zsa0, a resistor Rsa0 and an NPN BJT Qsa0, where n is a positive integer, a cathode of the regulator Zsa0 is connected to a port Vin of the power supply controller, an anode of the regulator Zsa0 is connected to one end of the resistor Rsa0, the other end of the resistor Rsa0 is connected to a base of the NPN BJT Qsa0, the port Control of the controlled current source 1 is connected to a base of the NPN BJT Qsaj, a value range of the NPN BJT is1 to n, a collector of the NPN BJT Qsa0 and a collector of the BJT Qsa1 to the collector of the NPN BJT Qsan are connected to a first port of the controlled current source 1, an emitter of the NPN BJT Qsa0 and an emitter of the NPN BJT Qsa1 to the emitter of the NPN BJT qn are connected to a second port of the controlled current source 1, and a signal detection terminal of the NPN BJT 1 is connected to the second port Control, the detection signal includes at least one of a detection signal of an inductor current, a detection signal of a capacitor current, a detection signal of a load current, a detection signal of an inductor voltage, a detection signal of a capacitor voltage, a detection signal of a load voltage, and a detection signal of an input voltage. The controlled current source 1 has the characteristic of power supply end voltage self-adaption. That is, when Zsa0 is turned on in the reverse direction, the higher the voltage at port Vin, the larger the current is1 flowing into the first port of controlled current source 1.

The controlled current source 2 comprises a voltage-regulator tube Zsb1 and a resistor Rsb1, wherein the cathode of the voltage-regulator tube Zsb1 is connected with the first port of the controlled current source 2, the anode of the voltage-regulator tube Zsb1 is connected with one end of a resistor Rsb1, and the other end of the resistor Rsb1 is connected with the second port of the controlled current source 2. The controlled current source 2 has the characteristic of power supply end voltage self-adaption. That is, when Zsb1 is turned on in the reverse direction, the higher the voltage at port Vin, the larger the current is2 flowing out of the second port of controlled current source 2.

The output unit converts the control signal of the port a into a driving signal of the port b, so that the power supply controller has the capability of driving the power semiconductor device. The output unit further comprises a port Vdd, an NPN BJT transistor Qa1, a PNP BJT transistor Qa2, a resistor Ra1, a diode Da1, a variable resistor, a capacitor Ca1 and a PNP BJT transistor Qa3, wherein the collector of the NPN BJT transistor Qa1 is connected with the port Vdd, the base of the NPN BJT transistor Qa1 is simultaneously connected with one end of the resistor Ra1 and the base of the PNP BJT transistor Qa2, the other end of the resistor Ra1 is simultaneously connected with the port a of the output unit and the cathode of the diode Da1, the emitter of the NPN BJT transistor Qa1 is simultaneously connected with the anode of the diode Da1, the emitter of the PNP BJT transistor Qa2, the base of the PNP BJT transistor Qa3, one end of the capacitor Ca1 and the first port of the variable resistor, the second port of the variable resistor is simultaneously connected with the port b of the output unit, the other end of the capacitor Ca1 and the emitter of the PNP BJT transistor Qa3, the collector of the PNP BJT transistor is simultaneously connected with the PNP BJT 2 and the PNP BJT transistor controller, the power supply provides necessary electric energy for the output unit, and the port Vdd is a power supply end of the output unit.

The variable resistor comprises an NPN BJT transistor Qa4, an NPN BJT transistor Qa5, a resistor Ra2 and a resistor Ra3, one end of the resistor Ra2 is connected with a first port of the variable resistor, the other end of the resistor Ra2 is connected with a base of the NPN BJT transistor Qa4 and a collector of the NPN BJT transistor Qa5, a collector of the NPN BJT transistor Qa4 is connected with a port Vdd of the output unit, an emitter of the NPN BJT transistor Qa4 is connected with the base of the NPN BJT transistor Qa5 and one end of the resistor Ra3, and an emitter of the NPN BJT transistor Qa5 is connected with the other end of the resistor Ra3 and a second port of the variable resistor. The resistance value of the variable resistor increases with the increase of the voltage drop from the first port to the second port, and the characteristic is favorable for reducing the driving loss of the power semiconductor device under a wide working voltage range.

The output unit is matched with an N-channel MOS tube or an N-channel IGBT tube on the low-voltage side in the power supply. The low-voltage side port of the low-voltage side N-channel MOS tube is a source electrode, the non-low-voltage side port is a drain electrode, and the control port is a grid electrode. The low-voltage side port of the low-voltage side N-channel IGBT tube is an emitting electrode, the non-low-voltage side port is a collecting electrode, and the control port is a grid electrode. The resistor Ra1 and the diode Da1 work together to improve the impedance matching between the output unit and the preceding stage. The capacitor Ca1 and the PNP BJT Qa3 cooperate to accelerate the switching speed of the low-side N-channel MOS transistor or N-channel IGBT transistor.

In contrast to the multivibrator shown in fig. 1, the main body of the power supply controller inherits most of the structure of the multivibrator. However, in order to meet the requirements of wide working voltage and high input voltage application, the power controller adds D1 and D2 on the basis of a multivibrator, and the power controller is used for inhibiting negative voltage appearing on base-emitters of Q1 and Q2 in the oscillation process, preventing the base-emitters of Q1 and Q2 from being reversely broken down and simultaneously improving the oscillation working frequency; r4 and R5 are added, the function of the R4 and R5 is to limit the base current of Q1 and Q2 during oscillation, and the base of Q1 and Q2 can be prevented from overheating.

In addition to the similar structure, the self-oscillation working mechanism of the power supply controller is similar to that of a multivibrator. In the operating voltage range where the controlled current source 2 is active (i.e. is2>0), Q1 and Q2 are turned on and off alternately, and the operating frequency of oscillation is related to the voltage at port Vcc.

To provide a wide duty cycle range, the power supply controller takes C1< < C2. Furthermore, both the controlled current source 1 and the controlled current source 2 can influence the duty cycle of the control signal at port a. The current is1 flowing into the first port of the controlled current source 1 affects the charging speed of the capacitor C1 when the NPN BJT Q1 is turned on and the discharging speed of the capacitor C1 when the NPN BJT Q2 is turned on, and the larger is1>0 and is1, the longer the on-time of Q1 and the shorter the on-time of Q2, which results in the smaller duty ratio of the control signal at the port a. The current is2 flowing out of the second port of the controlled current source 2 affects the charging speed of the capacitor C2 when the NPN BJT Q2 is turned on and the discharging speed of the capacitor C2 when the Q1 is turned on, and the larger is2>0 and is2, the shorter Q2 and the longer Q1 turn-on time are, which also results in the smaller duty ratio of the control signal at the port a. By using the controlled current source 1 and the controlled current source 2 properly, an effective feedforward or feedback control loop can be formed.

Further, referring to fig. 6, a power supply composed of the power supply controller includes a power main circuit and a control circuit using the power supply controller as a core, the power main circuit includes an inductor L k1, an N-channel MOS transistor Mk1, a diode Dk1, a capacitor Ck1, a resistor Rk1 and a capacitor Ck1, one end of the inductor 1 k1 is connected to a positive terminal of a dc power supply, the other end of the inductor 1 k1 is connected to an anode of the diode Dk1 and an anode of the diode Dk1, a cathode of the diode Dk1 is connected to one end of the capacitor Ck1, one end of the capacitor Ck1 and one end of a load, a cathode of the diode Dk1 is connected to a drain of the N-channel MOS transistor Mk1, a source of the N-channel MOS transistor Mk1 is connected to the other end of the capacitor Ck1 and one end of the resistor Rk1, the other end of the capacitor Ck1 and the other end of the dc power supply 72, the power main circuit 1, the dc power main circuit is connected to the dc power supply, the dc power supply 72, the dc power main circuit is connected to the dc power supply 72, the dc power supply 72, the dc power main circuit is connected to the dc power supply, the dc power supply 72, the dc power supply is connected to the dc power supply, the dc circuit, the capacitor Ck1, the dc power supply is connected to the dc circuit, the dc power supply 72, the dc power supply is connected to the dc circuit, the dc circuit 72, the dc circuit is connected to the dc circuit, the load is connected to the dc circuit, the dc circuit 72.

The control circuit comprises the power controller, a voltage regulator tube Zk1, a voltage regulator tube Zk2, a resistor Rk2, a resistor Rk3, a resistor Rk4 and a capacitor Ck3, wherein n is2, the port Vin of the power supply controller is connected with the positive terminal of the direct current power supply, one end of the resistor Rk4 and the port Vdd at the same time, a Vcc port of the power controller is connected with the other end of a resistor Rk4, an Out port of the power controller is simultaneously connected with a grid electrode of an N-channel MOS tube Mk1 and a cathode of a voltage regulator tube Zk1, an anode of the voltage regulator tube Zk1 is connected with an anode of the voltage regulator tube Zk2, a cathode of the voltage regulator tube Zk2 is simultaneously connected with a Control1 port of the power controller and one end of a resistor Rk1, one end of the resistor Rk2 is simultaneously connected with one end of a load and one end of a capacitor Ck3, the other end of the resistor Rk2 is simultaneously connected with the other end of the capacitor Ck3, one end of the resistor Rk3 and a Control2 port of the power controller, and the port of the power controller is connected with a negative terminal Vss of a direct-current power supply. The resistor Rk4 is used for reducing the voltage of the power supply controller port Vcc, which is beneficial to reducing the loss of the power supply controller. The role of the voltage regulators Zk1 and Zk2 is to prevent the gate-source voltage of Mk1 from being too high. The control circuit performs dual control of the power main circuit: the current iRk1 of the resistor Rk1 is used for current-limiting control and the voltage-stabilizing control of the load voltage Vo.

For a wider and higher input voltage application, that is, the dc power voltage Vi is 134-. Choose resistance type load, right the utility model discloses embodiment 1 carries out the emulation.

Fig. 7 is a comparison graph (start-up phase) of the control signal va of the embodiment 1 of the present invention at the lowest input voltage and the highest input voltage in the open loop control. Fig. 8 is a comparison graph (steady state phase) of the control signal va of the embodiment 1 of the present invention at the lowest input voltage and the highest input voltage under the control closed loop condition. As can be seen from fig. 7, in the case of open-loop Control (i.e., when ports Control1 and Control2 are disconnected from the power main circuit and then shorted to port Vss), the power controller can operate by self-excitation when the minimum input voltage Vi _ min (134V) and the maximum input voltage Vi _ max (177V) are both set, but the Control signal voltage va at port a has a difference, and the oscillation frequency and the duty ratio are different. This shows that the power supply controller has the characteristic of power supply voltage or direct current power supply voltage self-adaption. Comparing fig. 7 and fig. 8, it can be seen that in the case of a closed Control loop (i.e. the ports Control1 and Control2 are connected to the main power circuit), the ports Control1 and Control2 reduce the oscillation operating frequency of va by the action of the controlled current source 1, and the duty cycle is also reduced. Fig. 9 is a simulation waveform diagram of embodiment 1 of the present invention at the lowest input voltage. Fig. 10 is a simulated waveform diagram of embodiment 1 of the present invention at the highest input voltage. As can be seen from fig. 9 and 10, the power supply controller adopts a current-voltage dual control strategy, so that the power supply can realize a constant load voltage Vo within a wide dc input voltage range, and Vo > Vi.

Example 2

Referring to fig. 3, 4 and 5, a multivibrator-based NPN BJT type power controller includes an output unit having a port a and a port b, a port Vss and a port Vdd, a PNP BJT Qb2, a resistor Rb1, a capacitor Cb1, a resistor Rb2, a diode Db1, an NPN BJT Qb3, a resistor Rb3, a capacitor Cb2 and a resistor Rb4, a collector of the NPN BJT Qb1 is connected to the port Vdd, a base of the NPN BJT Qb1 is simultaneously connected to the base of the PNP BJT Qb2 and the port a of the output unit, a capacitor Cb1 and a resistor Rb2 are connected in series, an emitter of the NPN BJT Qb1 is simultaneously connected to the emitter of the PNP BJT Qb2, one end of the resistor Cb1 and one end of the capacitor Cb1 and the resistor Rb2, a base of the PNP BJT Qb 8672 and the other end of the resistor Rb 8 1 67 are connected in series, the capacitor Cb2 and the resistor Rb4 are connected in series, the collector of the NPN type BJT tube Qb3 is simultaneously connected with one end of the resistor Rb3 and one end of the serial branch of the capacitor Cb2 and the resistor Rb4, the other end of the resistor Rb3 is simultaneously connected with the other end of the serial branch of the capacitor Cb2 and the resistor Rb4 and the port b of the output unit, and the emitter of the NPN type BJT tube Qb3 is simultaneously connected with the anode of the diode Db1, the collector of the PNP type BJT tube Qb2 and the port Vss.

The output unit is matched with a PNP type BJT tube at the high voltage side in the power supply. The high-voltage side port of the high-voltage side PNP type BJT tube is an emitter, the non-high-voltage side port is a collector, and the control port is a base. The capacitor Cb1, the resistor Rb2 and the diode Db1 work together to accelerate the switching speed of the Qb3, and the capacitor Cb2 and the resistor Rb4 work together to accelerate the switching speed of the PNP BJT transistor at the high-voltage side.

The rest of the power supply controller in embodiment 2 is the same as that in embodiment 1, and the operation mechanism of both is also similar.

Further, referring to fig. 11, a power supply composed of the power supply controller comprises a power main circuit and a control circuit with the power supply controller as a core, the power main circuit comprises a diode Dm1, a diode Dm2, a diode Dm3, a diode Dm4, an inductor L m L, a capacitor Cm L, a diode Dm L, a PNP BJT Qm L, a PNP qdm L, an inductor L m L, a capacitor Cm L, a resistor Rm L and a resistor Rm L, the anode of the diode Dm L is connected to the cathode of the diode Dm L and one end of a single-phase ac power supply, the cathode of the diode Dm L is connected to the cathode of the Dm L and one end of the inductor L m L, the capacitor Cm L, the capacitor Dm L, the anode of the PNP qdm L, the collector L, the capacitor Dm L, the capacitor Rm L, the capacitor Cm L, the collector L, the emitter of the PNP qdm L, the PNP L, the emitter L, the PNP qdm L, the emitter L, the PNP qdm L, the emitter L, the PNP qdm L, the PNP L, the emitter L, the PNP L, the emitter L, the PNP qdm L, the PNP L, the emitter L, the PNP qdm L, the emitter of the emitter L, the PNP qdm L, the PNP L, the emitter L, the PNP qdm L, the emitter L, the PNP qdm L, the PNP L, the emitter 36.

The Control circuit comprises the power controller, a diode Dm9, a diode Dm10, a voltage regulator tube Zm1, a resistor Rm5, a resistor Rm1, a diode Dm7, a resistor Rm2 and a diode Dm8, wherein n is1, a port Vin of the power controller is simultaneously connected with an anode of the diode Dm9 and a cathode of the diode Dm1, a cathode of the diode Dm9 is connected with a cathode of the voltage regulator tube Zm1, an anode of the voltage regulator tube Zm1 is connected with one end of a resistor Rm5, the other end of the resistor Rm5 is simultaneously connected with a port Vcc of the power controller, a port Vdd of the power controller and a cathode of the diode Dm10, an anode of the diode Dm10 is connected with one end of a load, a port Control1 of the power controller is connected with the other end of the load, one end of the resistor Rm1 is simultaneously connected with an emitter of a PNP transistor Qm BJT 1, a cathode of the diode Dm7, one end of the resistor Dm2 and a cathode of the PNP transistor DM2, and a cathode of the diode Rm2, the other end of the resistor Rm2 is simultaneously connected with the base of the PNP type BJT tube Qm2, the anode of the diode Dm8 and the port Out of the power controller, and the port Vss of the power controller is connected with the anode of the diode Dm 3. The diode Dm9, the diode Dm10, the voltage regulator tube Zm1 and the resistor Rm5 jointly form a power supply branch circuit, so that electric energy is supplied to the power supply controller, and meanwhile, the loss of the power supply controller is reduced. The resistor Rm1, diode Dm7, resistor Rm2, and diode Dm8 cooperate to accelerate the turn-off speed of Qm1 and Qm 2. And the control circuit controls the peak value of the superposed load current of the inductive current to the power main circuit.

For a wider and higher input voltage application, that is, the single-phase ac power source effective value voltage Vac is 95-125V, Q1, Q2, Qsa0, Qsa1, Qb1 and Qb3 can adopt MPSA44, Qb2, Qm1 and Qm2 can adopt mpsa94, select resistance + voltage type load (for example, L ED containing internal resistance and storage battery containing internal resistance), simulate the embodiment 2 of the present invention, fig. 12 is the simulated waveform diagram of embodiment 2 at the lowest input voltage, fig. 13 is the simulated waveform diagram (local detail) of embodiment 2 at the lowest input voltage, fig. 14 is the simulated waveform diagram of embodiment 2 at the highest input voltage, fig. 15 is the simulated waveform diagram (local detail) of embodiment 2 at the highest input voltage, fig. 12 to fig. 15 can be known, the power source controller adopts single-weight control, the single-phase ac power source voltage is superposed within the wide input voltage range, and the constant voltage load voltage can be realized, and Vo can be realized

The input current iac exhibits a concave character.

The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, and the scope of the invention should not be considered limited to the specific forms set forth in the embodiments, but rather by the claims and their equivalents.

Claims

1. An NPN BJT type power supply controller based on multivibrator is characterized in that: the power controller comprises a port Vcc, a port Vin, a port Vss and a port Out, and further comprises an NPN BJT Q1, an NPN BJT Q2, a capacitor C1, a capacitor C2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a diode D1, a diode D2, a controlled current source 1, a controlled current source 2 and an output unit, wherein the output unit comprises a port a and a port b, one end of the resistor R1 is simultaneously connected with one end of the resistor R2, one end of the resistor R3 and the port Vcc, the other end of the resistor R1 is simultaneously connected with a collector of the NPN BJT Q1, one end of the capacitor C1 and a of the output unit, a base of the NPN BJT Q1 is simultaneously connected with a cathode of the diode D1 and one end of the resistor R7, the other end of the resistor R3 is simultaneously connected with a collector of the NPN BJT Q2 and one end of the cathode of the NPN BJT 36 4 2, the other end of the resistor R2 is connected with the first port of the controlled current source 1, the other port of the capacitor C1 and the other port of the resistor R5 at the same time, the first port of the controlled current source 2 is connected with the port Vin, the second port of the controlled current source 2 is connected with the other end of the resistor R4 and the other end of the capacitor C2 at the same time, the emitter of the NPN BJT transistor Q1 is connected with the second port of the controlled current source 1, the cathode of the diode D1, the cathode of the diode D2, the emitter of the NPN BJT transistor Q2 and the port Vss at the same time, and the port b of the output unit is connected with the port Out;

the current is1 flowing into the first port of the controlled current source 1 affects the charging speed of the capacitor C1 when the NPN BJT Q1 is turned on and the discharging speed of the capacitor C1 when the NPN BJT Q2 is turned on, and further affects the control signal of the port a;

the current is2 flowing out of the second port of the controlled current source 2 affects the charging speed of the capacitor C2 when the NPN BJT Q2 is turned on and the discharging speed of the capacitor C2 when the transistor Q1 is turned on, and further affects the control signal of the port a;

2. The multivibrator-based NPN BJT type power supply controller of claim 1, wherein: the power supply composed of the power supply controller comprises a power main circuit and a control circuit taking the power supply controller as a core, wherein the power main circuit is any power electronic circuit comprising a high-voltage side power semiconductor device or a low-voltage side power semiconductor device.

3. The multivibrator-based NPN BJT type power supply controller of claim 1, wherein: the controlled current source 1 further comprises a port Control1 to a port Control, an NPN BJT tube Qsa1 to an NPN BJT tube Qsan, a voltage regulator tube Zsa0, a resistor Rsa0 and an NPN BJT tube Qsa0, where n is a positive integer, a cathode of the voltage regulator tube Zsa0 is connected to the port Vin of the power supply controller, an anode of the voltage regulator tube Zsa0 is connected to one end of the resistor Rsa0, the other end of the resistor Rsa0 is connected to a base of the NPN BJT tube Qsa0, the port Control of the controlled current source 1 is connected to a base of the NPN BJT tube Qsaj, a value range of the NPN BJT tube Zsa is1 to n, a collector of the NPN BJT tube Qsa0 and a collector of the BJT tube BJT Qsa1 to a collector of the NPN BJT tube Qsan are both connected to the first port of the controlled current source 1, an emitter of the NPN BJT tube Qsa0 and an emitter of the BJT tube Qsa1 are both connected to the second port of the NPN BJT tube Qsan emitter 1, and a signal detection signal is connected to the second port of the controlled current source 1, the detection signal comprises at least one of a detection signal of inductive current, a detection signal of capacitive current, a detection signal of load current, a detection signal of inductive voltage, a detection signal of capacitive voltage, a detection signal of load voltage and a detection signal of input voltage;

or the ports from Control1 to Control are connected with a digital-to-analog converter controlled by a programmable device, wherein the programmable device is a single chip, a DSP or an FPGA.

4. The multivibrator-based NPN BJT type power supply controller of claim 1, wherein: the controlled current source 2 comprises a voltage-regulator tube Zsb1 and a resistor Rsb1, wherein the cathode of the voltage-regulator tube Zsb1 is connected with the first port of the controlled current source 2, the anode of the voltage-regulator tube Zsb1 is connected with one end of a resistor Rsb1, and the other end of the resistor Rsb1 is connected with the second port of the controlled current source 2.

5. The multivibrator-based NPN BJT type power supply controller as claimed in one of claims 1-4, wherein: the output unit further comprises a port Vdd, an NPN BJT transistor Qa1, a PNP BJT transistor Qa2, a resistor Ra1, a diode Da1, a variable resistor, a capacitor Ca1 and a PNP BJT transistor Qa3, wherein the collector of the NPN BJT transistor Qa1 is connected with the port Vdd, the base of the NPN BJT transistor Qa1 is simultaneously connected with one end of the resistor Ra1 and the base of the PNP BJT transistor Qa2, the other end of the resistor Ra1 is simultaneously connected with the port a of the output unit and the cathode of the diode Da1, the emitter of the NPN BJT transistor Qa1 is simultaneously connected with the anode of the diode Da1, the emitter of the PNP BJT transistor Qa2, the base of the PNP BJT transistor Qa3, one end of the capacitor Ca1 and the first port of the variable resistor, the second port of the variable resistor is simultaneously connected with the port b of the output unit, the other end of the capacitor Ca1 and the emitter of the PNP BJT transistor Qa3, the collector of the PNP BJT transistor is simultaneously connected with the PNP BJT 2 and the PNP BJT transistor controller, the power supply provides necessary electric energy for the output unit, the port Vdd is a power supply end of the output unit, and the resistance value of the variable resistor is related to the voltage drop from the first port to the second port.

6. The multivibrator-based NPN BJT type power supply controller according to claim 5, wherein: the variable resistor comprises an NPN BJT transistor Qa4, an NPN BJT transistor Qa5, a resistor Ra2 and a resistor Ra3, one end of the resistor Ra2 is connected with a first port of the variable resistor, the other end of the resistor Ra2 is simultaneously connected with a base electrode of the NPN BJT transistor Qa4 and a collector electrode of the NPN BJT transistor Qa5, a collector electrode of the NPN BJT transistor Qa4 is connected with a port Vdd of the output unit, an emitter electrode of the NPN BJT transistor Qa4 is simultaneously connected with a base electrode of the NPN BJT transistor Qa5 and one end of the resistor Ra3, and an emitter electrode of the NPN BJT transistor Qa5 is simultaneously connected with the other end of the resistor Ra3 and a second port of the variable resistor.

7. The NPN BJT type power supply controller based on multivibrator as claimed in claim 2, wherein said power main circuit includes an inductor L k1, an N-channel MOS transistor Mk1, a diode Dk1, a diode Dk2, a capacitor Ck1, a resistor Rk1 and a capacitor Ck2, one end of the inductor L k1 is connected to the positive terminal of the DC power supply, the other end of the inductor L k1 is connected to the anode of the diode Dk1 and the anode of the diode Dk2, the cathode of the diode Dk2 is connected to one end of the capacitor Ck1, one end of the capacitor Ck2 and one end of the load, the cathode of the diode Dk1 is connected to the drain of the N-channel MOS transistor Mk1, the source of the N-channel MOS transistor Mk1 is connected to the other end of the capacitor Ck1 and one end of the resistor Rk1, the other end of the resistor Rk1 is connected to the negative terminal of the DC power supply, the other end of the capacitor Ck2 and the other end of;

the control circuit comprises the power controller, a voltage regulator tube Zk1, a voltage regulator tube Zk2, a resistor Rk2, a resistor Rk3, a resistor Rk4 and a capacitor Ck3, wherein n is2, the port Vin of the power supply controller is connected with the positive terminal of the direct current power supply, one end of the resistor Rk4 and the port Vdd at the same time, a Vcc port of the power controller is connected with the other end of a resistor Rk4, an Out port of the power controller is simultaneously connected with a grid electrode of an N-channel MOS tube Mk1 and a cathode of a voltage regulator tube Zk1, an anode of the voltage regulator tube Zk1 is connected with an anode of the voltage regulator tube Zk2, a cathode of the voltage regulator tube Zk2 is simultaneously connected with a Control1 port of the power controller and one end of a resistor Rk1, one end of the resistor Rk2 is simultaneously connected with one end of a load and one end of a capacitor Ck3, the other end of the resistor Rk2 is simultaneously connected with the other end of the capacitor Ck3, one end of the resistor Rk3 and a Control2 port of the power controller, and the port of the power controller is connected with a negative terminal Vss of a direct-current power supply.

8. The multivibrator-based NPN BJT type power supply controller as claimed in one of claims 1-4, wherein: the output unit further comprises a port Vdd, an NPN BJT tube Qb1, a PNP BJT tube Qb2, a resistor Rb1, a capacitor Cb1, a resistor Rb2, a diode Db1, an NPN BJT tube Qb3, a resistor Rb3, a capacitor Cb 3 and a resistor Rb3, wherein a collector of the NPN BJT tube Qb3 is connected with the port Vdd, a base of the NPN BJT tube Qb3 is simultaneously connected with a base of the PNP BJT tube Qb3 and a port a of the output unit, the capacitor Cb 3 and the resistor Rb3 are connected in series, an emitter of the NPN BJT tube BJT Qb3 is simultaneously connected with an emitter of the PNP BJT tube Qb3, one end of the resistor Rb3 and one end of a series branch of the capacitor Cb 3 and the resistor Rb3, the other end of the resistor Rb3 and the resistor Cb 3 are simultaneously connected with the other end of the series branch of the Cb 3 and the resistor Cb 3, the resistor Cb 3 and one end of the series branch of the NPN BJT 3, the resistor Cb 3 and the resistor Cb 3 are simultaneously connected with one end of the series resistor C, the other end of the resistor Rb3 is connected to the other end of the series branch of the capacitor Cb2 and the resistor Rb4 and the port b of the output unit, the emitter of the NPN BJT transistor Qb3 is connected to the anode of the diode Db1, the collector of the PNP BJT transistor Qb2 and the port Vss, the power supply provides necessary electric energy for the output unit, and the port Vdd is the power supply end of the output unit.

9. The multi-vibrator based NPN BJT type power controller as claimed in claim 2, wherein said power main circuit includes diode Dm1, diode Dm2, inductor 2 m2, capacitor Cm2, diode Dm2, PNP BJT transistor Qm2, inductor 2 m2, capacitor Cm2, resistor Rm2 and resistor Rm2, the anode of diode Dm2 is connected to the cathode of diode Dm2 and one end of single-phase AC power supply, the cathode of diode Dm2 is connected to the cathode of diode Dm2 and one end of inductor 2 m2, the other end of inductor 2 m2 is connected to one end of capacitor Cm2 and the emitter of diode Cm2, the other end of diode Dm2 is connected to the cathode of diode Dm2, the anode of diode Dm2 and the anode of the capacitor Cm2, the emitter of the diode Dm2 is connected to the cathode of the other end of the diode Dm2, the emitter of the PNP BJT 2 and the other end of the capacitor of the PNP load, the emitter of the diode DMP BJT 2 are connected to the emitter of the diode DMP transistor M2, the diode DMP transistor, the emitter of the diode DMP transistor, the emitter of the other end of the emitter of the diode DMP transistor M2 and the emitter of the PNP transistor M2 are connected to the emitter of the other end of the emitter of the PNP transistor, the emitter of the PNP transistor, the emitter of the PNP transistor is connected to;

the Control circuit comprises the power controller, a diode Dm9, a diode Dm10, a voltage regulator tube Zm1, a resistor Rm5, a resistor Rm1, a diode Dm7, a resistor Rm2 and a diode Dm8, wherein n is1, a port Vin of the power controller is simultaneously connected with an anode of the diode Dm9 and a cathode of the diode Dm1, a cathode of the diode Dm9 is connected with a cathode of the voltage regulator tube Zm1, an anode of the voltage regulator tube Zm1 is connected with one end of a resistor Rm5, the other end of the resistor Rm5 is simultaneously connected with a port Vcc of the power controller, a port Vdd of the power controller and a cathode of the diode Dm10, an anode of the diode Dm10 is connected with one end of a load, a port Control1 of the power controller is connected with the other end of the load, one end of the resistor Rm1 is simultaneously connected with an emitter of a PNP transistor Qm BJT 1, a cathode of the diode Dm7, one end of the resistor Dm2 and a cathode of the PNP transistor DM2, and a cathode of the diode Rm2, the other end of the resistor Rm2 is simultaneously connected with the base of the PNP type BJT tube Qm2, the anode of the diode Dm8 and the port Out of the power controller, and the port Vss of the power controller is connected with the anode of the diode Dm 3.