CN102769380A - BJT (Bipolar Junction Transistor) type auto-excitation Buck-Boost converter with little loss driven by main switching tube - Google Patents
BJT (Bipolar Junction Transistor) type auto-excitation Buck-Boost converter with little loss driven by main switching tube Download PDFInfo
- Publication number
- CN102769380A CN102769380A CN2012101537965A CN201210153796A CN102769380A CN 102769380 A CN102769380 A CN 102769380A CN 2012101537965 A CN2012101537965 A CN 2012101537965A CN 201210153796 A CN201210153796 A CN 201210153796A CN 102769380 A CN102769380 A CN 102769380A
- Authority
- CN
- China
- Prior art keywords
- positive
- resistance
- links
- negative
- bjt pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention provides a BJT (Bipolar Junction Transistor) type auto-excitation Buck-Boost converter with little loss driven by a main switching tube, comprising a main loop of the Buck-Boost converter, and a driving unit of the main switching tube Q1, wherein the main loop of the Buck-Boost converter consists of an input capacitor Ci, a PNP (Positive-and- Positive) type BJT tube Q1 of the main switching tube, an inductor L, a diode D and a capacitor Co; the driving unit of the main switching tube Q1 consists of a resistor R1, a resistor R2, a resistor R3, an NPN (Negative-and-negative) type BJT tube Q2 and a PNP type BJT tube Q3; the emitting electrode of the PNP type BJT tube Q3 is connected with one end of the resistor R3 and the base electrode of the NPN type BJT tube Q2; the other end of the resistor R3 is connected with the positive end of an input voltage source Vi and the emitting electrode of the PNP type BJT tube Q1; the collecting electrode of the NPN type BJT tube Q2 is connected with one end of the resistor R1; the other end of the resistor R1 is connected with the base electrode of the PNP type BJT tube Q1; the emitting electrode of the NPN type BJT tube Q2 is connected with one end of the resistor R2; and the other end of the resistor R2 is connected with the negative end of the direct voltage source Vi.
Description
Technical field
The present invention relates to autonomous DC-DC (DC-DC) converter, be applied to switch voltage-stabilizing or stabilized current power supply, high-brightness LED drive circuit etc., especially a kind of auto-excitation type Buck-Boost converter.
Background technology
Compare with separated exciting DC-DC converter with linear (voltage stabilizing or current stabilization) adjuster, auto-excitation type DC-DC converter has the high remarkable advantage of cost performance.What Fig. 1 provided is BJT (bipolar transistor) the type auto-excitation type Buck-Boost converter that a kind of circuit structure is simple, the components and parts number is few; The major loop that comprises the Buck-Boost converter of forming by input capacitance Ci, positive-negative-positive BJT pipe Q1, inductance L, diode D and output capacitance Co; Input capacitance Ci is parallelly connected with direct voltage source Vi; Output capacitance Co voltage is VD Vo, and load Ro is parallelly connected with output capacitance Co, and the negative terminal of direct voltage source Vi links to each other with the anode of VD Vo; The anode of direct voltage source Vi links to each other with the emitter of positive-negative-positive BJT pipe Q1; The collector electrode of positive-negative-positive BJT pipe Q1 links to each other with an end of inductance L and the negative electrode of diode D, and the other end of inductance L links to each other with the negative terminal of direct voltage source Vi, and the anode of diode D links to each other with the negative terminal of VD Vo.BJT type auto-excitation type Buck-Boost converter shown in Figure 1 also comprises the driver element of main switch Q1; The driver element of said main switch Q1 is made up of resistance R 1, resistance R 2, resistance R 3, capacitor C 1 and positive-negative-positive BJT pipe Q2; The emitter and collector of said positive-negative-positive BJT pipe Q2 links to each other with base stage with the emitter of positive-negative-positive BJT pipe Q1 respectively; The base stage of positive-negative-positive BJT pipe Q1 also is connected to the negative terminal of direct voltage source Vi through resistance R 1; Resistance R 3 is formed parallel branch with capacitor C 1; One end of said parallel branch links to each other with the collector electrode of positive-negative-positive BJT pipe Q1, and the other end of said parallel branch links to each other with the base stage of positive-negative-positive BJT pipe Q2 and an end of resistance R 2, and the other end of resistance R 2 links to each other with the emitter of positive-negative-positive BJT pipe Q2.BJT type auto-excitation type Buck-Boost converter shown in Figure 1 also comprises the Voltage Feedback branch road; Said Voltage Feedback is propped up route resistance R 4, resistance R 5, voltage-stabiliser tube Z1 and NPN type BJT pipe Q3 and is formed; The negative electrode of said voltage-stabiliser tube Z1 links to each other with the negative terminal of direct voltage source Vi; The anode of voltage-stabiliser tube Z1 links to each other with the base stage of NPN type BJT pipe Q3 and an end of resistance R 5; The emitter of NPN type BJT pipe Q3 links to each other with the other end of resistance R 5 and the negative terminal of VD Vo, and the collector electrode of NPN type BJT pipe Q3 links to each other through the base stage of resistance R 4 with positive-negative-positive BJT pipe Q2.The weak point of this circuit is: the driver element that is made up of main switch Q1 driving resistor R1, positive-negative-positive BJT pipe Q2, resistance R 2, resistance R 3 and capacitor C 1;, main switch Q1 still have big electric current to flow through driving resistor R1 when turn-offing; Cause the drive loss of Q1 bigger; Thereby influence the efficient of circuit, especially the light-load efficiency of circuit.
Summary of the invention
For overcoming the bigger deficiency of existing BJT type auto-excitation type Buck-Boost converter main switch drive loss, the present invention provides a kind of main switch drive loss little BJT type auto-excitation type Buck-Boost converter.
The technical solution adopted for the present invention to solve the technical problems is: the BJT type auto-excitation type Buck-Boost converter that a kind of main switch drive loss is little comprises the major loop of the Buck-Boost converter of being made up of input capacitance Ci, positive-negative-positive BJT pipe Q1, inductance L, diode D and capacitor C o; Input capacitance Ci is parallelly connected with direct voltage source Vi; Output capacitance Co voltage is VD Vo; Load Ro is parallelly connected with output capacitance Co; The negative terminal of direct voltage source Vi links to each other with the anode of VD Vo, and the anode of direct voltage source Vi links to each other with the emitter of positive-negative-positive BJT pipe Q1, and the collector electrode of positive-negative-positive BJT pipe Q1 links to each other with an end of inductance L and the negative electrode of diode D; The other end of inductance L links to each other with the negative terminal of direct voltage source Vi, and the anode of diode D links to each other with the negative terminal of VD Vo;
The BJT type auto-excitation type Buck-Boost converter that said main switch drive loss is little also comprises the driver element of main switch Q1; The driver element of said main switch Q1 is made up of resistance R 1, resistance R 2, resistance R 3, NPN type BJT pipe Q2 and positive-negative-positive BJT pipe Q3; The emitter of said positive-negative-positive BJT pipe Q3 links to each other with the base stage of an end of resistance R 3 and NPN type BJT pipe Q2; The other end of resistance R 3 links to each other with the anode of input voltage source Vi and the emitter of positive-negative-positive BJT pipe Q1; The collector electrode of positive-negative-positive BJT pipe Q3 links to each other with the base stage of positive-negative-positive BJT pipe Q3 and an end of resistance R 4; The other end of resistance R 4 links to each other with the collector electrode of positive-negative-positive BJT pipe Q1, and the collector electrode of NPN type BJT pipe Q2 links to each other with an end of resistance R 1, and the other end of resistance R 1 links to each other with the base stage of positive-negative-positive BJT pipe Q1; The emitter of NPN type BJT pipe Q2 links to each other with an end of resistance R 2, and the other end of resistance R 2 links to each other with the negative terminal of direct voltage source Vi.For improving the dynamic property of circuit, shunt capacitance C1 between the base stage that can manage Q2 at collector electrode and the NPN type BJT of positive-negative-positive BJT pipe Q1.In addition, but positive-negative-positive BJT manages the collector electrode reconfiguration of Q3 in the negative terminal of direct voltage source Vi, but resistance R 2 short circuits.
Further; As preferred a kind of scheme: the BJT type auto-excitation type Buck-Boost converter that said main switch drive loss is little also comprises the Voltage Feedback branch road; Said Voltage Feedback branch road comprises NPN type BJT pipe Q4; Resistance R 5, resistance R 6 and voltage-stabiliser tube Z1; The collector electrode of said NPN type BJT pipe Q4 links to each other with an end of resistance R 5, and the other end of resistance R 5 links to each other with the base stage of NPN type BJT pipe Q2 and the emitter of positive-negative-positive BJT pipe Q3, and the emitter of NPN type BJT pipe Q4 links to each other with the anode of diode D, the end of capacitor C o, the negative terminal of VD Vo and an end of resistance R 6; The base stage of NPN type BJT pipe Q4 links to each other with the anode of voltage-stabiliser tube Z1 and the other end of resistance R 6, and the negative electrode of voltage-stabiliser tube Z1 links to each other with the anode of output voltage V o.Be to improve the dynamic property of circuit, can be at voltage-stabiliser tube Z1 two ends shunt capacitance C2.
Perhaps; As preferred another kind of scheme: the BJT type auto-excitation type Buck-Boost converter that said main switch drive loss is little also comprises the current feedback branch road; Said current feedback branch road comprises NPN type BJT pipe Q4, resistance R 5, resistance R 6, resistance R 7 and diode D1; The collector electrode of NPN type BJT pipe Q4 links to each other with an end of resistance R 5; The other end of resistance R 5 links to each other with the base stage of NPN type BJT pipe Q2 and the emitter of positive-negative-positive BJT pipe Q3; The emitter of NPN type BJT pipe Q4 links to each other with the anode of diode D, the end of capacitor C o and an end of resistance R 7; The other end of resistance R 7 links to each other with the negative terminal of VD Vo and the negative electrode of diode D1, and the base stage of NPN type BJT pipe Q4 links to each other with the anode of diode D1 and an end of resistance R 6, and the other end of resistance R 6 links to each other with the anode of input voltage source Vi and the emitter of positive-negative-positive BJT pipe Q1.For improving the dynamic property of circuit, can be at resistance R 6 two ends shunt capacitance C2.
Technical conceive of the present invention is: on the basis of existing BJT type auto-excitation type Buck-Boost converter shown in Figure 1, replace former lossy big main switch driver element (shown in Fig. 2 ~ 5) with the little main switch driver element of loss.The little main switch driver element of loss is made up of resistance R 1, resistance R 2, resistance R 3, NPN type BJT pipe Q2 and positive-negative-positive BJT pipe Q3.Its characteristic is following: the emitter of positive-negative-positive BJT pipe Q3 links to each other with the base stage of an end of resistance R 3 and NPN type BJT pipe Q2; The other end of resistance R 3 links to each other with the anode of input voltage source Vi and the emitter of positive-negative-positive BJT pipe Q1; The collector electrode of positive-negative-positive BJT pipe Q3 links to each other with the base stage of positive-negative-positive BJT pipe Q3 and an end of resistance R 4; The other end of resistance R 4 links to each other with the collector electrode of positive-negative-positive BJT pipe Q1, and the collector electrode of NPN type BJT pipe Q2 links to each other with an end of resistance R 1, and the other end of resistance R 1 links to each other with the base stage of positive-negative-positive BJT pipe Q1; The emitter of NPN type BJT pipe Q2 links to each other with an end of resistance R 2, and the other end of resistance R 2 links to each other with the negative terminal of direct voltage source Vi.For improving the dynamic property of circuit, shunt capacitance C1 between the base stage that can manage Q2 at collector electrode and the NPN type BJT of positive-negative-positive BJT pipe Q1.In addition, but positive-negative-positive BJT manages the collector electrode reconfiguration of Q3 in the negative terminal of direct voltage source Vi, but resistance R 2 short circuits.
For obtaining stable VD; Between the output of Buck-Boost converter major loop and main switch driver element, can increase a Voltage Feedback branch road, form (like Fig. 2 and shown in Figure 4) by NPN type BJT pipe Q4, resistance R 5, resistance R 6 and voltage-stabiliser tube Z1.Be to improve the dynamic property of entire circuit, can be at voltage-stabiliser tube Z1 two ends shunt capacitance C2.
For obtaining stable average anode current; Between the output of Buck-Boost converter major loop and main switch driver element, can increase a current feedback branch road, form (like Fig. 3 and shown in Figure 5) by NPN type BJT pipe Q4, resistance R 5, resistance R 6, resistance R 7 and diode D1.For improving the dynamic property of entire circuit, can be at resistance R 6 two ends shunt capacitance C2.
Beneficial effect of the present invention mainly shows: the BJT type auto-excitation type Buck-Boost converter that the present invention proposes not only has the advantage that circuit structure is simple, the components and parts number is few; But also have the advantage that the main switch drive loss is little, light-load efficiency is high, be fit to very much the switch voltage-stabilizing or the application such as stabilized current power supply, high-brightness LED drive circuit of small-power (several watts of levels are following) buck-boost type.
Description of drawings
Fig. 1 is the circuit diagram of existing a kind of BJT type auto-excitation type Buck-Boost converter.
Fig. 2 is the circuit diagram of the little BJT type auto-excitation type Buck-Boost converter embodiment 1 of main switch drive loss.
Fig. 3 is the circuit diagram of the little BJT type auto-excitation type Buck-Boost converter embodiment 2 of main switch drive loss.
Fig. 4 is the circuit diagram of the little BJT type auto-excitation type Buck-Boost converter embodiment 3 of main switch drive loss.
Fig. 5 is the circuit diagram of the little BJT type auto-excitation type Buck-Boost converter embodiment 4 of main switch drive loss.
Fig. 6 is the little ideal waveform figure of BJT type auto-excitation type Buck-Boost converter embodiment 1 under the critical continuous operation mode of inductive current iL of main switch drive loss.
Fig. 7 is the little ideal waveform figure of BJT type auto-excitation type Buck-Boost converter embodiment 2 under the critical continuous operation mode of inductive current iL of main switch drive loss.
Fig. 8 is the little ideal waveform figure of BJT type auto-excitation type Buck-Boost converter embodiment 3 under the critical continuous operation mode of inductive current iL of main switch drive loss.
Fig. 9 is the little ideal waveform figure of BJT type auto-excitation type Buck-Boost converter embodiment 4 under the critical continuous operation mode of inductive current iL of main switch drive loss.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Embodiment 1
With reference to Fig. 2 and Fig. 6; The BJT type auto-excitation type Buck-Boost converter that a kind of main switch drive loss is little comprises the major loop of the Buck-Boost converter of being made up of input capacitance Ci, positive-negative-positive BJT pipe Q1, inductance L, diode D and capacitor C o; Input capacitance Ci is parallelly connected with direct voltage source Vi; Output capacitance Co voltage is VD Vo, and load Ro is parallelly connected with output capacitance Co, and the negative terminal of direct voltage source Vi links to each other with the anode of VD Vo; The anode of direct voltage source Vi links to each other with the emitter of positive-negative-positive BJT pipe Q1; The collector electrode of positive-negative-positive BJT pipe Q1 links to each other with an end of inductance L and the negative electrode of diode D, and the other end of inductance L links to each other with the negative terminal of direct voltage source Vi, and the anode of diode D links to each other with the negative terminal of VD Vo.The BJT type auto-excitation type Buck-Boost converter that said main switch drive loss is little also comprises the driver element of main switch Q1; The driver element of said main switch Q1 is made up of resistance R 1, resistance R 2, resistance R 3, capacitor C 1, NPN type BJT pipe Q2 and positive-negative-positive BJT pipe Q3; The emitter of said positive-negative-positive BJT pipe Q3 links to each other with the base stage of an end of resistance R 3 and NPN type BJT pipe Q2; The other end of resistance R 3 links to each other with the anode of input voltage source Vi and the emitter of positive-negative-positive BJT pipe Q1; The collector electrode of positive-negative-positive BJT pipe Q3 links to each other with the base stage of positive-negative-positive BJT pipe Q3 and an end of resistance R 4; The other end of resistance R 4 links to each other with the collector electrode of positive-negative-positive BJT pipe Q1, and the collector electrode of NPN type BJT pipe Q2 links to each other with an end of resistance R 1, and the other end of resistance R 1 links to each other with the base stage of positive-negative-positive BJT pipe Q1; The emitter of NPN type BJT pipe Q2 links to each other with an end of resistance R 2, and the other end of resistance R 2 links to each other with the negative terminal of direct voltage source Vi.For improving the dynamic property of circuit, shunt capacitance C1 between the base stage of the collector electrode of positive-negative-positive BJT pipe Q1 and NPN type BJT pipe Q2.
Fig. 2 is the circuit diagram of the little BJT type auto-excitation type Buck-Boost converter embodiment 1 of main switch drive loss, has adopted the Voltage Feedback branch road.Said Voltage Feedback branch road comprises voltage-stabiliser tube Z1, resistance R 5, resistance R 6, NPN type BJT pipe Q4 and capacitor C 2; The collector electrode of NPN type BJT pipe Q4 links to each other with an end of resistance R 5; The other end of resistance R 5 links to each other with the base stage of NPN type BJT pipe Q2 and the emitter of positive-negative-positive BJT pipe Q3; The emitter of NPN type BJT pipe Q4 links to each other with the anode of diode D, the end of capacitor C o, the negative terminal of VD Vo and an end of resistance R 6, and the base stage of NPN type BJT pipe Q4 links to each other with the anode of voltage-stabiliser tube Z1 and the other end of resistance R 6.For improving the dynamic property of circuit, voltage-stabiliser tube Z1 two ends shunt capacitance C2.
Fig. 6 is the little ideal waveform figure of BJT type auto-excitation type Buck-Boost converter embodiment 1 under the critical continuous operation mode of inductive current iL of main switch drive loss.Its circuit working principle is specific as follows:
(1) in circuit electrifying startup stage: the t=t0 moment, circuit powers on, and direct voltage source Vi (vi) rises since 0.Just begin, Q1, Q2, Q3, Q4 and D all end, and output voltage V o (vo) is 0.The t=t1 moment, when promptly Vi rises to certain value, Q2 conducting, and then Q1 conducting.After the Q1 conducting, vi, Q1 become the loop with L shaped, the inductance L charging, and inductive current iL begins to increase.Along with the increase of iL, Q1 collector current ic1 and emitter-collector voltage vec1 also increases thereupon, causes the collector voltage vc1 of Q1 to fall.The t=t2 moment, when promptly vc1 drops into certain value, the Q3 conducting, Q2 turn-offs, and then Q1 turn-offs.Q1 closes and has no progeny, the D conducting, and D, L, Co and Ro form the loop, the inductance L discharge, inductive current iL begins to reduce.In the t=t3 moment, inductive current iL is reduced to 0, and D ends.After D ends, the Q2 conducting, Q3 turn-offs, and then Q1 conducting once more, and circuit gets into the next self-excitation work period.Go through several cycles, after the output voltage of circuit reached set point Vo, circuit had just been accomplished the electrifying startup process, got into the steady operation stage.
(2) the circuit steady operation stage: after the output voltage of circuit reached set point Vo, the Voltage Feedback branch road of circuit just began to work.When output voltage was higher than set point Vo, the effect through Z1 made the Q4 conducting, and then Q2 and Q1 turn-off, and through the ON time (being t5-t4) that shortens Q1, the deadline (being t6-t5) that prolongs Q1, realized the reduction of output voltage.When output voltage was lower than set point Vo, Z1 was inoperative, and Q4 turn-offs, and recovers the conducting of Q1 and deadline former state again, realized the lifting of output voltage.Thus, circuit can realize exporting voltage stabilizing.
Embodiment 2
With reference to Fig. 3 and Fig. 7; Present embodiment comprises the major loop of the Buck-Boost converter of being made up of input capacitance Ci, positive-negative-positive BJT pipe Q1, inductance L, diode D and capacitor C o and the driver element of managing the main switch Q1 that Q3 forms by resistance R 1, resistance R 2, resistance R 3, capacitor C 1, NPN type BJT pipe Q2 and positive-negative-positive BJT, also comprises the current feedback branch road.Said current feedback branch road comprises NPN type BJT pipe Q4, resistance R 5, resistance R 6, resistance R 7, diode D1 and capacitor C 2; The collector electrode of NPN type BJT pipe Q4 links to each other with an end of resistance R 5; The other end of resistance R 5 links to each other with the base stage of NPN type BJT pipe Q2 and the emitter of positive-negative-positive BJT pipe Q3; The emitter of NPN type BJT pipe Q4 links to each other with the anode of diode D, the end of capacitor C o and an end of resistance R 7; The other end of resistance R 7 links to each other with the negative terminal of VD Vo and the negative electrode of diode D1; The base stage of NPN type BJT pipe Q4 links to each other with the anode of diode D1 and an end of resistance R 6, and the other end of resistance R 6 links to each other with the anode of input voltage source Vi and the emitter of positive-negative-positive BJT pipe Q1.For improving the dynamic property of circuit, resistance R 6 two ends shunt capacitance C2.
Other circuit structures of present embodiment are identical with embodiment 1.
Fig. 7 is the little ideal waveform figure of BJT type auto-excitation type Buck-Boost converter embodiment 2 under the critical continuous operation mode of inductive current iL of main switch drive loss.Its circuit working principle is specific as follows:
(1) the circuit electrifying startup stage: identical with embodiment 1, go through several cycles, after the output current of circuit reached set point Io, circuit had just been accomplished the electrifying startup process, got into the steady operation stage.
(2) the circuit steady operation stage: after the output current of circuit reached set point Io, the current feedback branch road of circuit just began to work.When output current during greater than set point Io, the effect through D1 and R7 makes the Q4 conducting, and then Q2 and Q1 turn-off, and through the ON time (being t5-t4) that shortens Q1, the deadline (being t6-t5) that prolongs Q1, realizes reducing of output current.When output current during less than set point Io, D1 and R7 are inoperative, and Q4 turn-offs, and recovers the conducting of Q1 and deadline former state again, the lifting of realization output current.Thus, circuit can realize exporting current stabilization.
Embodiment 3
With reference to Fig. 4 and Fig. 8, present embodiment comprises the major loop of the Buck-Boost converter of being made up of input capacitance Ci, positive-negative-positive BJT pipe Q1, inductance L, diode D and capacitor C o, also comprises the driver element of main switch Q1.The driver element of said main switch Q1 is made up of resistance R 1, resistance R 2, resistance R 3, capacitor C 1, NPN type BJT pipe Q2 and positive-negative-positive BJT pipe Q3; The emitter of said positive-negative-positive BJT pipe Q3 links to each other with the base stage of an end of resistance R 3 and NPN type BJT pipe Q2; The other end of resistance R 3 links to each other with the anode of input voltage source Vi and the emitter of positive-negative-positive BJT pipe Q1; The collector electrode of positive-negative-positive BJT pipe Q3 links to each other with the negative terminal of direct voltage source Vi, and the base stage of positive-negative-positive BJT pipe Q3 links to each other with an end of resistance R 4, and the other end of resistance R 4 links to each other with the collector electrode of positive-negative-positive BJT pipe Q1; The collector electrode of NPN type BJT pipe Q2 links to each other with an end of resistance R 1; The other end of resistance R 1 links to each other with the base stage of positive-negative-positive BJT pipe Q1, and the emitter of NPN type BJT pipe Q2 links to each other with an end of resistance R 2, and the other end of resistance R 2 links to each other with the negative terminal of direct voltage source Vi.For improving the dynamic property of circuit, shunt capacitance C1 between the base stage of the collector electrode of positive-negative-positive BJT pipe Q1 and NPN type BJT pipe Q2.
Other circuit structures of present embodiment are identical with embodiment 1.
Fig. 8 is the little ideal waveform figure of BJT type auto-excitation type Buck-Boost converter embodiment 3 under the critical continuous operation mode of inductive current iL of main switch drive loss.Its circuit working principle is similar with embodiment 1, and circuit also can realize exporting voltage stabilizing.
Embodiment 4
With reference to Fig. 5 and Fig. 9, present embodiment comprises the major loop of the Buck-Boost converter of being made up of input capacitance Ci, positive-negative-positive BJT pipe Q1, inductance L, diode D and capacitor C o, also comprises the driver element of main switch Q1.The driver element of said main switch Q1 is made up of resistance R 1, resistance R 3, capacitor C 1, NPN type BJT pipe Q2 and positive-negative-positive BJT pipe Q3; The emitter of said positive-negative-positive BJT pipe Q3 links to each other with the base stage of an end of resistance R 3 and NPN type BJT pipe Q2; The other end of resistance R 3 links to each other with the anode of input voltage source Vi and the emitter of positive-negative-positive BJT pipe Q1; The collector electrode of positive-negative-positive BJT pipe Q3 links to each other with an end of resistance R 4 with the base stage of positive-negative-positive BJT pipe Q3; The other end of resistance R 4 links to each other with the collector electrode of positive-negative-positive BJT pipe Q1; The collector electrode of NPN type BJT pipe Q2 links to each other with an end of resistance R 1, and the other end of resistance R 1 links to each other with the base stage of positive-negative-positive BJT pipe Q1, and the emitter of NPN type BJT pipe Q2 links to each other with the negative terminal of direct voltage source Vi.For improving the dynamic property of circuit, shunt capacitance C1 between the base stage of the collector electrode of positive-negative-positive BJT pipe Q1 and NPN type BJT pipe Q2.
Other circuit structures of present embodiment are identical with embodiment 2.
Fig. 9 is the little ideal waveform figure of BJT type auto-excitation type Buck-Boost converter embodiment 4 under the critical continuous operation mode of inductive current iL of main switch drive loss.Its circuit working principle is similar with embodiment 2, and circuit also can realize exporting current stabilization.
The described content of this specification embodiment only is enumerating the way of realization of inventive concept; Should not being regarded as of protection scope of the present invention only limits to the concrete form that embodiment states, protection scope of the present invention also reach in those skilled in the art conceive according to the present invention the equivalent technologies means that can expect.
Claims (8)
1. the little BJT type auto-excitation type Buck-Boost converter of main switch drive loss comprises the major loop of the Buck-Boost converter of being made up of input capacitance Ci, positive-negative-positive BJT pipe Q1, inductance L, diode D and capacitor C o; Input capacitance Ci is parallelly connected with direct voltage source Vi; Output capacitance Co voltage is VD Vo; Load Ro is parallelly connected with output capacitance Co; The negative terminal of direct voltage source Vi links to each other with the anode of VD Vo, and the anode of direct voltage source Vi links to each other with the emitter of positive-negative-positive BJT pipe Q1, and the collector electrode of positive-negative-positive BJT pipe Q1 links to each other with an end of inductance L and the negative electrode of diode D; The other end of inductance L links to each other with the negative terminal of direct voltage source Vi; The anode of diode D links to each other with the negative terminal of VD Vo, it is characterized in that: said auto-excitation type Buck-Boost converter also comprises the driver element of main switch Q1, and the driver element of said main switch Q1 is made up of resistance R 1, resistance R 2, resistance R 3, NPN type BJT pipe Q2 and positive-negative-positive BJT pipe Q3; The emitter of said positive-negative-positive BJT pipe Q3 links to each other with the base stage of an end of resistance R 3 and NPN type BJT pipe Q2; The other end of resistance R 3 links to each other with the anode of input voltage source Vi and the emitter of positive-negative-positive BJT pipe Q1, and the collector electrode of positive-negative-positive BJT pipe Q3 links to each other with the base stage of positive-negative-positive BJT pipe Q3 and an end of resistance R 4, and the other end of resistance R 4 links to each other with the collector electrode of positive-negative-positive BJT pipe Q1; The collector electrode of NPN type BJT pipe Q2 links to each other with an end of resistance R 1; The other end of resistance R 1 links to each other with the base stage of positive-negative-positive BJT pipe Q1, and the emitter of NPN type BJT pipe Q2 links to each other with an end of resistance R 2, and the other end of resistance R 2 links to each other with the negative terminal of direct voltage source Vi.
2. the BJT type auto-excitation type Buck-Boost converter that main switch drive loss as claimed in claim 1 is little is characterized in that: the collector electrode reconfiguration of said positive-negative-positive BJT pipe Q3 is in the negative terminal of direct voltage source Vi.
3. the BJT type auto-excitation type Buck-Boost converter that main switch drive loss as claimed in claim 1 is little is characterized in that: shunt capacitance C1 between the base stage of the collector electrode of said positive-negative-positive BJT pipe Q1 and NPN type BJT pipe Q2.
4. the BJT type auto-excitation type Buck-Boost converter that main switch drive loss as claimed in claim 2 is little is characterized in that: shunt capacitance C1 between the base stage of the collector electrode of said positive-negative-positive BJT pipe Q1 and NPN type BJT pipe Q2.
5. the BJT type auto-excitation type Buck-Boost converter little like the described main switch drive loss of one of claim 1～4; It is characterized in that: said auto-excitation type Buck-Boost converter also comprises the Voltage Feedback branch road; Said Voltage Feedback is propped up route resistance R 5, resistance R 6, voltage-stabiliser tube Z1 and NPN type BJT pipe Q4 and is formed; The collector electrode of said NPN type BJT pipe Q4 links to each other with an end of resistance R 5; The other end of resistance R 5 links to each other with the base stage of NPN type BJT pipe Q2 and the emitter of positive-negative-positive BJT pipe Q3; The emitter of NPN type BJT pipe Q4 links to each other with the anode of diode D, the end of capacitor C o, the negative terminal of VD Vo and an end of resistance R 6, and the base stage of NPN type BJT pipe Q4 links to each other with the anode of voltage-stabiliser tube Z1 and the other end of resistance R 6, and the negative electrode of voltage-stabiliser tube Z1 links to each other with the anode of VD Vo.
6. the BJT type auto-excitation type Buck-Boost converter that main switch drive loss as claimed in claim 5 is little is characterized in that: the two ends shunt capacitance C2 of said voltage-stabiliser tube Z1.
7. the BJT type auto-excitation type Buck-Boost converter little like the described main switch drive loss of one of claim 1～4; It is characterized in that: said auto-excitation type Buck-Boost converter also comprises the current feedback branch road; Said current feedback is propped up route resistance R 5, resistance R 6, resistance R 7, diode D1 and NPN type BJT pipe Q4 and is formed; The collector electrode of said NPN type BJT pipe Q4 links to each other with an end of resistance R 5; The other end of resistance R 5 links to each other with the base stage of NPN type BJT pipe Q2 and the emitter of positive-negative-positive BJT pipe Q3; The emitter of NPN type BJT pipe Q4 links to each other with the anode of diode D, the end of capacitor C o and an end of resistance R 7; The other end of resistance R 7 links to each other with the negative terminal of VD Vo and the negative electrode of diode D1, and the base stage of NPN type BJT pipe Q4 links to each other with the anode of diode D1 and an end of resistance R 6, and the other end of resistance R 6 links to each other with the anode of input voltage source Vi and the emitter of positive-negative-positive BJT pipe Q1.
8. the BJT type auto-excitation type Buck-Boost converter that main switch drive loss as claimed in claim 7 is little is characterized in that: the two ends shunt capacitance C2 of said resistance R 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210153796.5A CN102769380B (en) | 2012-05-17 | 2012-05-17 | BJT (Bipolar Junction Transistor) type auto-excitation Buck-Boost converter with little loss driven by main switching tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210153796.5A CN102769380B (en) | 2012-05-17 | 2012-05-17 | BJT (Bipolar Junction Transistor) type auto-excitation Buck-Boost converter with little loss driven by main switching tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102769380A true CN102769380A (en) | 2012-11-07 |
| CN102769380B CN102769380B (en) | 2014-11-12 |
Family
ID=47096660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210153796.5A Active CN102769380B (en) | 2012-05-17 | 2012-05-17 | BJT (Bipolar Junction Transistor) type auto-excitation Buck-Boost converter with little loss driven by main switching tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102769380B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038058A (en) * | 2014-06-10 | 2014-09-10 | 浙江日风电气有限公司 | Input adaptive auto-excitation type Buck-boost converter |
| CN105141152A (en) * | 2015-09-18 | 2015-12-09 | 浙江工业大学 | Self-excited BJT type bridgeless Buck-Boost PFC rectifying circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1282840A (en) * | 2000-04-27 | 2001-02-07 | 王晏晨 | Electronic igniter of engine |
| JP2003333838A (en) * | 2002-05-17 | 2003-11-21 | Cosel Co Ltd | Self-excited switching power supply |
| JP2006304471A (en) * | 2005-04-20 | 2006-11-02 | Cosel Co Ltd | Self-excited type switching power supply device |
| CN201181429Y (en) * | 2007-12-19 | 2009-01-14 | 重庆航聚电子有限公司 | Self-activated switch voltage-stabilized supply |
| CN102403895A (en) * | 2011-11-22 | 2012-04-04 | 浙江工业大学 | Self-excitation Sepic converter based on MOSFET |
-
2012
- 2012-05-17 CN CN201210153796.5A patent/CN102769380B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1282840A (en) * | 2000-04-27 | 2001-02-07 | 王晏晨 | Electronic igniter of engine |
| JP2003333838A (en) * | 2002-05-17 | 2003-11-21 | Cosel Co Ltd | Self-excited switching power supply |
| JP2006304471A (en) * | 2005-04-20 | 2006-11-02 | Cosel Co Ltd | Self-excited type switching power supply device |
| CN201181429Y (en) * | 2007-12-19 | 2009-01-14 | 重庆航聚电子有限公司 | Self-activated switch voltage-stabilized supply |
| CN102403895A (en) * | 2011-11-22 | 2012-04-04 | 浙江工业大学 | Self-excitation Sepic converter based on MOSFET |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038058A (en) * | 2014-06-10 | 2014-09-10 | 浙江日风电气有限公司 | Input adaptive auto-excitation type Buck-boost converter |
| CN104038058B (en) * | 2014-06-10 | 2016-08-17 | 浙江日风电气股份有限公司 | Input adaptive auto-excitation type Buck-boost changer |
| CN105141152A (en) * | 2015-09-18 | 2015-12-09 | 浙江工业大学 | Self-excited BJT type bridgeless Buck-Boost PFC rectifying circuit |
| CN105141152B (en) * | 2015-09-18 | 2017-11-07 | 浙江工业大学 | Auto-excitation type BJT types are without bridge Buck Boost PFC rectification circuits |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102769380B (en) | 2014-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101877532B (en) | Bipolar transistor auto-excitation type Buck convertor | |
| US20150097507A1 (en) | Motor driving apparatus | |
| CN101562395A (en) | Voltage modulation circuit capable of increasing light load efficiency | |
| CN102820780B (en) | Bipolar junction transistor (BJT) auto-excitation type Zeta convertor with low main switch tube drive loss | |
| CN101877535B (en) | Bipolar transistor self-exciting Buck-Boost converter | |
| CN101877534B (en) | Bipolar transistor self-exciting Sepic converter | |
| CN104052279B (en) | A kind of self-excitation Sepic converter based on MOSFET | |
| CN102820784B (en) | BJT (bipolar junction transistor)-type auto-excitation Buck converter with small main switching tube driving loss | |
| CN101877536B (en) | Bipolar transistor self-exciting Cuk converter | |
| CN102684493B (en) | BJT type self-excited Boost converter equipped with main switching tube with low drive loss | |
| CN101877533B (en) | Bipolar transistor self-exciting Zeta converter | |
| CN102403896B (en) | Self excited Boost converter based on MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) | |
| CN202617002U (en) | Feedback BJT type self-excited Boost converter | |
| CN102769380B (en) | BJT (Bipolar Junction Transistor) type auto-excitation Buck-Boost converter with little loss driven by main switching tube | |
| CN202617003U (en) | BJT type self-excited Boost converter with small driving loss of main switching tube | |
| CN202679243U (en) | BJT type self-excited Buck converter with small main switch tube driving loss | |
| CN102684487B (en) | BJT type self-excited Sepic converter equipped with main switching tube with low drive loss | |
| CN104023445A (en) | LED driving circuit | |
| CN102510216B (en) | MOSFET-based auto-excitation type Cuk converter | |
| CN102723866B (en) | BJT-typed self-exciting Cuk converter provided with main switching transistor having small driving loss | |
| CN102710132B (en) | Feedback type bipolar junction transistor (BJT) self-exciting Boost converter | |
| CN201733223U (en) | Bipolar transistor self-excitation type Buck converter | |
| CN102510217B (en) | MOSFET-based auto-excitation type Zeta converter | |
| CN102522892B (en) | Auto-excitation-type Buck converter based on metal oxide semiconductor field effect transistor (MOSFET) | |
| CN102522890B (en) | Auto-excitation type Buck-Boost converter based on MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191209 Address after: 314300 room 240, building 1, new economy Pioneer Park, Tongyuan Town, Haiyan County, Jiaxing City, Zhejiang Province Patentee after: Jiaxing huahuihong Garden Co.,Ltd. Address before: 310018 Room 1004-1006, 17 Block 57, Baiyang Street Science Park Road, Hangzhou Economic and Technological Development Zone, Zhejiang Province Patentee before: Zhejiang Qibo Intellectual Property Operation Co.,Ltd. Effective date of registration: 20191209 Address after: 310018 Room 1004-1006, 17 Block 57, Baiyang Street Science Park Road, Hangzhou Economic and Technological Development Zone, Zhejiang Province Patentee after: Zhejiang Qibo Intellectual Property Operation Co.,Ltd. Address before: 310014 Hangzhou city in the lower reaches of the city of Zhejiang Wang Road, No. 18 Patentee before: Zhejiang University of Technology |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200917 Address after: Room 319, No.8, Nujiang Road, Hexi District, Tianjin 300202 Patentee after: Tianjin kodit Technology Co.,Ltd. Address before: 314300 room 240, building 1, new economy Pioneer Park, Tongyuan Town, Haiyan County, Jiaxing City, Zhejiang Province Patentee before: Jiaxing huahuihong Garden Co.,Ltd. |
|
| TR01 | Transfer of patent right |