A kind of power initiation system for high withstand voltage eclipsed form DC-DC converter
Technical field
The utility model is related to converter technical field, more particularly to a kind of to be used for high withstand voltage eclipsed form DC-DC conversion
The power initiation system of device.
Background technology
For the switch converters of high input voltage,《High withstand voltage eclipsed form flyback DC-DC converter is designed》Propose one kind
High pressure resistant eclipsed form DC-DC converter circuit, solves the design problem of low power switch pipe power supply under high inlet highway voltage.
But the circuit uses resistance as power starting circuit, when input voltage is wide scope, to ensure low pressure
Normal to start, resistance will have very high power consumption during high pressure, have a strong impact on quiescent dissipation, efficiency and power supply reliability.At present, for
Such case, there is solution below, and one is that the special accessory power supply of increase is master control chip power supply, so that master control chip is opened
Dynamic converter circuit, but accessory power supply can increase very big cost.
Therefore, how can either ensure the startup to high withstand voltage eclipsed form DC-DC converter, power consumption can be reduced again, reduce
Cost, is the current technical issues that need to address of those skilled in the art.
Utility model content
The purpose of this utility model is to provide a kind of power initiation system for high withstand voltage eclipsed form DC-DC converter,
The startup to high withstand voltage eclipsed form DC-DC converter can either be ensured, power consumption can be reduced again, cost is reduced.
In order to solve the above technical problems, the utility model provides following technical scheme:
A kind of power initiation system for high withstand voltage eclipsed form DC-DC converter, including:
The main power part of high withstand voltage eclipsed form DC-DC converter, the transformer primary avris of the main power part includes n grades of strings
The primary coil module of connection, primary coil modules at different levels include corresponding primary coil, input capacitance unit and equalizing resistance list
Member, the primary coil and the input capacitance unit are in parallel, and the input capacitance unit and the equalizing resistance unit are in parallel,
The input capacitance unit includes the input capacitance of some series connection, and the equalizing resistance unit includes and each input capacitance one
One correspondence equalizing resistance in parallel, each equalizing resistance series connection, wherein, the input capacitance unit of first order primary coil module
Negative pole ground connection, n is integer more than 1;
Between the input capacitance unit and equalizing resistance unit of the first order primary coil module, for providing base
The negative pole connection of the voltage-stabiliser tube of quasi- voltage, the positive pole of the voltage-stabiliser tube and the input capacitance unit;
With the primary coils of m grades of primary coil modules of the main power part away from m-1 grades of primary coil modules
First triode of one end connection, the base stage of first triode and the negative pole connection of the voltage-stabiliser tube, the one or three pole
The colelctor electrode of pipe and m grades of primary coil modules connection, m is the integer more than 0;
It is connected with the base stage of first triode, controls the switching controlling part of the first triode break-make;
It is connected with the emitter stage of first triode, for the IC master for the high withstand voltage eclipsed form DC-DC converter
Control the storage capacitor of chip power supply.
Preferably, in addition to:It is arranged on the protection electricity between first triode and the m grades of primary coil modules
Road.
Preferably, in addition to:It is arranged between the emitter stage of first triode and the storage capacitor, for limiting
The flow control resistance of the size of the charging current of the storage capacitor.
Preferably, in addition to:It is arranged on the diode between the switching controlling part and the storage capacitor.
Preferably, the switching controlling part is switching tube, the control end of the switching tube and IC main control chips connection.
Preferably, the switching tube is management and control triode, and the base stage of the management and control triode and the IC main control chips connect
Connect, the negative pole connection of the colelctor electrode of the management and control triode and the voltage-stabiliser tube, the emitter stage of the management and control triode and described
The positive pole connection of voltage-stabiliser tube.
Preferably, the colelctor electrode of first triode and the primary coil of second level primary coil module deviate from first
One end connection of level primary coil module, wherein, the first order primary coil module includes the first input electricity being serially connected
Appearance, the second input capacitance, the second level primary coil module include the 3rd input electricity connected with second input capacitance
Hold and the 4th input capacitance, the first order primary coil module includes the first equalizing resistance and the second equal piezoelectricity being serially connected
Resistance, first equalizing resistance and first input capacitance are in parallel, second equalizing resistance and second input capacitance
Parallel connection, the 3rd equalizing resistance and the 4th that the second level primary coil module includes connecting with second equalizing resistance is pressed
Resistance, the 3rd equalizing resistance and the 3rd input capacitance are in parallel, the 4th equalizing resistance and the 4th input electricity
Hold in parallel.
Preferably, the protection circuit includes:Second triode, the 3rd triode and the 4th triode, the described 2nd 3
The colelctor electrode connection of the emitter stage of pole pipe and first triode, the base stage of second triode and the first input electricity
The emitter stage connection of the positive pole connection of appearance, the colelctor electrode of second triode and the 3rd triode, the three or three pole
The positive pole connection of the base stage of pipe and second input capacitance, the colelctor electrode of the 3rd triode and the 4th triode
Emitter stage is connected, the positive pole connection of the base stage and the 3rd input capacitance of the 4th triode, the 4th triode
Colelctor electrode and the connection of the positive pole of the 4th input capacitance.
Preferably, the protection circuit also includes:It is arranged between first triode and second triode
First resistor, is arranged on the second resistance between second triode and the 3rd triode, is arranged on the described 3rd 3
3rd resistor between pole pipe and the 4th triode, is arranged between the 4th triode and the 4th input capacitance
The 4th resistance.
Preferably, the protection circuit also includes:Be arranged on second triode base stage and the main power part it
Between the 5th resistance, be arranged on the 6th resistance between the base stage of the 3rd triode and the main power part, be arranged on institute
State the 7th resistance between the base stage of the 4th triode and the main power part.
Compared with prior art, above-mentioned technical proposal has advantages below:
A kind of power initiation system for high withstand voltage eclipsed form DC-DC converter that the utility model embodiment is provided
System, including:The main power part of high withstand voltage eclipsed form DC-DC converter, the transformer primary avris of main power part includes n grade and connected
Primary coil module, primary coil modules at different levels include corresponding primary coil, input capacitance unit and equalizing resistance unit, just
Level coil and input capacitance unit are in parallel, and input capacitance unit and equalizing resistance unit are in parallel, and input capacitance unit includes some
The input capacitance of series connection, equalizing resistance unit includes the equalizing resistance in parallel with each input capacitance one-to-one corresponding, each equalizing resistance
Series connection, wherein, the negative pole ground connection of the input capacitance unit of first order primary coil module, n is the integer more than 1;Positioned at first
Between the input capacitance unit and equalizing resistance unit of level primary coil module, the voltage-stabiliser tube for providing reference voltage, voltage stabilizing
The negative pole of the positive pole of pipe and the input capacitance unit is connected;Carried on the back with the primary coil of m grades of primary coil modules of main power part
From the first triode of one end connection of m-1 grades of primary coil modules, the base stage of the first triode and the negative pole of voltage-stabiliser tube connect
Connect, the colelctor electrode of the first triode and m grades of primary coil module connections, m is the integer more than 0;With the base of the first triode
Pole is connected, and controls the switching controlling part of the first triode break-make;It is connected with the emitter stage of the first triode, for for high withstand voltage weight
The storage capacitor that the IC main control chips of stacked DC-DC converter are powered.Power initiation system of the present utility model is directly resistance to from height
Power taking at the main power part of ballast stacked DC-DC converter, controls the first triode operation, by voltage-stabiliser tube by switching controlling part
Ensure that the first triode is powered to storage capacitor, constitute the circuit of approximate constant current, when storage capacitor charging reaches setting threshold
It can be powered during value for the IC main control chips of high withstand voltage eclipsed form DC-DC converter, start the operation of IC main control chips, and pass through IC
Main control chip controls the startup optimization of high withstand voltage eclipsed form DC-DC converter, after IC main control chips are working properly, controlling switch
Control unit shut-off power supply so that the system does not influence the operation of converter, it is ensured that to high withstand voltage eclipsed form DC-DC converter
Start, power consumption can be reduced again, cost is reduced.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are these
Some embodiments of utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to these accompanying drawings.
Fig. 1 is used for high withstand voltage eclipsed form DC-DC converter by what a kind of embodiment of the utility model was provided
Power initiation system structure diagram;
Fig. 2 is used for high withstand voltage eclipsed form DC-DC converter by what another embodiment of the utility model was provided
Power initiation system structure diagram;
Fig. 3 is used for high withstand voltage eclipsed form DC-DC converter by what the utility model another embodiment was provided
Power initiation system structure diagram;
Fig. 4 is used for high withstand voltage eclipsed form DC-DC converter by what the utility model another embodiment was provided
Power initiation system structure diagram;
Fig. 5 is used for high withstand voltage eclipsed form DC-DC converter by what another embodiment of the utility model was provided
Power initiation system structure diagram.
Embodiment
Core of the present utility model is to provide a kind of power initiation system for high withstand voltage eclipsed form DC-DC converter,
The startup to high withstand voltage eclipsed form DC-DC converter is ensure that, power consumption can be reduced again, cost is reduced.
In order that above-mentioned purpose of the present utility model, feature and advantage can become apparent it is understandable, it is right below in conjunction with the accompanying drawings
Embodiment of the present utility model is described in detail.
Detail is elaborated in the following description to fully understand the utility model.But the utility model can
It is different from other manner described here with a variety of and implements, those skilled in the art can be without prejudice to the utility model intension
In the case of do similar popularization.Therefore the utility model is not limited by following public embodiment.
Fig. 1 is refer to, Fig. 1 is used for high withstand voltage eclipsed form DC- by what a kind of embodiment of the utility model was provided
The power initiation system structure diagram of DC converters.
A kind of embodiment of the present utility model provides a kind of electricity for high withstand voltage eclipsed form DC-DC converter
Source activation system, including:The main power part 1 of high withstand voltage eclipsed form DC-DC converter, the transformer primary avris of main power part includes
The primary coil module of n grades of series connection, primary coil modules at different levels include corresponding primary coil, input capacitance unit and equal piezoelectricity
Unit is hindered, primary coil and input capacitance unit are in parallel, and input capacitance unit and equalizing resistance unit are in parallel, input capacitance unit
Include the input capacitance of some series connection, equalizing resistance unit includes the equalizing resistance in parallel with each input capacitance one-to-one corresponding, respectively
Equalizing resistance is connected, wherein, the negative pole ground connection of the input capacitance unit of first order primary coil module, n is the integer more than 1;
Between the input capacitance unit and equalizing resistance unit of first order primary coil module, the voltage stabilizing for providing reference voltage
The negative pole connection of pipe 2, the positive pole of voltage-stabiliser tube 2 and the input capacitance unit;With the main power of high withstand voltage eclipsed form DC-DC converter
First triode of the primary coil of the m grades of primary coil modules in portion 1 away from one end connection of m-1 grades of primary coil modules
3, the base stage of the first triode 3 and the negative pole of voltage-stabiliser tube 2 are connected, the colelctor electrode and m grades of primary coil modules of the first triode 3
Connection, m is the integer more than 0;It is connected with the base stage of the first triode 3, controls the switching controlling part 4 of the break-make of the first triode 3;
It is connected with the emitter stage of the first triode 3, the energy storage powered for the IC main control chips for high withstand voltage eclipsed form DC-DC converter
Electric capacity 5.
In the present embodiment, power initiation system is directly at the main power part of high withstand voltage eclipsed form DC-DC converter
Power taking, the first triode operation is controlled by switching controlling part, ensures that the first triode is supplied to storage capacitor from voltage-stabiliser tube
Electricity, constitutes the circuit of approximate constant current, can be high withstand voltage eclipsed form DC-DC conversion when storage capacitor charging reaches given threshold
The IC main control chips of device are powered, and start the operation of IC main control chips, and control high withstand voltage eclipsed form DC-DC to become by IC main control chips
The startup optimization of parallel operation, after IC main control chips are working properly, controlling switch control unit turns off the power supply of approximate constant current so that should
System does not influence the operation of converter, it is ensured that the startup to high withstand voltage eclipsed form DC-DC converter, and power consumption can be reduced again, drop
Low cost.
Fig. 2, Fig. 3, Fig. 4 and Fig. 5 are refer to, Fig. 2 is by being used for that another embodiment of the utility model is provided
The power initiation system structure diagram of high withstand voltage eclipsed form DC-DC converter;Fig. 3 is another specific implementation of the utility model
The power initiation system structure diagram for high withstand voltage eclipsed form DC-DC converter that mode is provided;Fig. 4 is that this practicality is new
The power initiation system architecture for high withstand voltage eclipsed form DC-DC converter that another embodiment of type is provided is illustrated
Figure;The power supply for high withstand voltage eclipsed form DC-DC converter that Fig. 5 is provided by another embodiment of the utility model
Activation system structural representation.
In a kind of embodiment of the present utility model, the power initiation system also includes:It is arranged on the He of the first triode 3
Protection circuit 6 between m grades of primary coil modules, the one or three pole is punctured in order to prevent the voltage x current of main power part excessive
Pipe, therefore it is provided with protection circuit.It is arranged between the emitter stage of the first triode 3 and storage capacitor 5, for limiting energy storage electricity
Hold the flow control resistance 7 of the size of 5 charging current, in order to ensure the stability of storage capacitor charging, flow control resistance is set, to control
System flows into the size of the electric current of storage capacitor, is similar to constant-current charge.It is arranged between switching controlling part 4 and storage capacitor 5
Diode 8.Wherein, diode 8 can have following several particular locations:As shown in Fig. 2 diode 8 is arranged on the He of flow control resistance 7
Between storage capacitor 5, the positive pole connection of the negative pole and storage capacitor 5 of diode 8, the positive pole and flow control resistance 7 of diode 8 connect
Connect;As shown in figure 3, diode 8 can also be arranged between the triode 3 of flow control resistance 7 and first, the negative pole of diode 8 and control
Leakage resistance 7 is connected, the emitter stage connection of the positive pole of diode 8 and the first triode 3;As shown in figure 4, the negative pole of diode 8 and
The base stage connection of first triode 3, the positive pole and switching controlling part 4 of diode 8 connect, the positive pole of diode 8 also with voltage-stabiliser tube 2
Negative pole connection;As shown in figure 5, the base stage connection of the negative pole of diode 8 and the first triode 3, the positive pole and switch of diode 8
Control unit 4 is connected, and the negative pole of diode 8 is also connected with the negative pole of voltage-stabiliser tube 2.The setting of diode can prevent storage capacitor anti-
Bad first triode of crushing.
In the present embodiment, the two-stage that the main power part of high withstand voltage eclipsed form DC-DC converter is included with the system becomes
Illustrated exemplified by parallel operation, as shown in Fig. 2 the colelctor electrode and the primary coil of second level primary coil module of the first triode 3
Away from first order primary coil module one end connect, wherein, first order primary coil module include be serially connected first
Input capacitance 111, the second input capacitance 112, second level primary coil module include the 3rd connected with the second input capacitance 112
The input capacitance 122 of input capacitance 121 and the 4th, first order primary coil module includes the first equalizing resistance 113 being serially connected
With the second equalizing resistance 114, the first equalizing resistance 113 and the first input capacitance 111 are in parallel, the second equalizing resistance 114 and second
Input capacitance 112 is in parallel, and second level primary coil module includes the 3rd equalizing resistance 123 connected with the second equalizing resistance 114
With the 4th equalizing resistance 124, the 3rd equalizing resistance 123 and the 3rd input capacitance 121 are in parallel, the 4th equalizing resistance 124 and the 4th
Input capacitance 122 is in parallel.
Further, protection circuit 6 includes:Second triode 61, the 3rd triode 62 and the 4th triode 63, the two or three
The colelctor electrode connection of the emitter stage of pole pipe 61 and the first triode 3, the base stage of the second triode 61 and the first input capacitance 111
Positive pole is connected, the emitter stage connection of the colelctor electrode of the second triode 61 and the 3rd triode 62, the base stage of the 3rd triode 62 and
The positive pole connection of second input capacitance 112, the emitter stage connection of the colelctor electrode and the 4th triode 63 of the 3rd triode 62, the 4th
The positive pole connection of the base stage of triode 63 and the 3rd input capacitance 121, the colelctor electrode and the 4th input capacitance of the 4th triode 63
122 positive pole connection.
Further, protection circuit 6 also includes:It is arranged on first between the first triode 3 and the second triode 61
Resistance 64, is arranged on the second resistance 65 between the second triode 61 and the 3rd triode 62, is arranged on the He of the 3rd triode 62
3rd resistor 66 between 4th triode 63, is arranged on the 4th electricity between the 4th triode 63 and the 4th input capacitance 122
Resistance 67.
Further, protection circuit 6 also includes:It is arranged between the base stage of the second triode 61 and main power part 1
The base stage connection of 5th resistance 68, i.e. one end of the 5th resistance 68 and the second triode 61, the other end of the 5th resistance 68 and the
One input capacitance 111 is connected with the common port of the second input capacitance 112;It is arranged on the base stage and main power part of the 3rd triode 62
The 6th resistance 69 between 1, i.e. one end of the 6th resistance 69 and the 3rd triode 62 base stage connection, the 6th resistance 69 it is another
End and the second input capacitance 112 are connected with the common port of the 3rd input capacitance 121;It is arranged on base stage and the master of the 4th triode 63
The base stage connection of 1 the 7th resistance 610, i.e. one end of the 7th resistance 610 and the 4th triode 63, the 7th resistance between power part
610 other end and the 3rd input capacitance 121 are connected with the common port of the 4th input capacitance 122.
In the present embodiment, first resistor, second resistance, the setting of 3rd resistor and the 4th resistance can reduce protection
The power consumption of each triode in circuit, to extend the service life of each triode.
It should be noted that simply including high withstand voltage eclipsed form DC-DC converter with the system in the present embodiment
Illustrated exemplified by the two-stage primary coil module of main power part, the system can also access the one-level primary coil mould of main power
Block, or multistage primary coil module, specifically depend on the circumstances, only need to accordingly increase and decrease the electricity connected with primary coil modules at different levels
Sub- device, and ensure charging normal for storage capacitor.
Wherein, in the present embodiment, preferably switching controlling part 4 is switching tube, the control end and IC master control cores of switching tube
Piece is connected, to receive the corresponding control signal of IC main control chips.
Further, switching tube 4 is preferably management and control triode 4, and the base stage and IC main control chips of management and control triode 4 are connected,
The negative pole connection of the colelctor electrode and voltage-stabiliser tube 2 of management and control triode 4, the emitter stage of management and control triode 4 and the positive pole of voltage-stabiliser tube 2 connect
Connect.As shown in Fig. 2 voltage-stabiliser tube is arranged on the bottom of the equalizing resistance of main power part, the negative pole of voltage-stabiliser tube and the first equal piezoelectricity
Resistance is connected away from one end of the second equalizing resistance, when approximate constant-current source (circuit of the i.e. approximate constant current) work of the system, surely
Pressure pipe provides the reference voltage of storage capacitor charging.
After IC main control chips are working properly, management and control triode ON can be controlled so that the voltage phase at voltage-stabiliser tube two ends
Together, to control the first triode to turn off, so as to close the approximate constant-current source of system composition.When management and control triode ON, make
The voltage in each input capacitance on winner's power part is equal, it is to avoid voltage-stabiliser tube produces influence to main power part.
It should be noted that in the present embodiment, simply preferred switching controlling part is management and control triode, i.e., preferred switch
Control unit is a triode, or metal-oxide-semiconductor.
It should also be noted that, in the technical program, all triodes in the system can also be replaced with into MOS
Pipe, but clamp diode must be incorporated between the grid and source electrode of the metal-oxide-semiconductor of every one-level, and because between grid and source electrode
Voltage between the base stage and emitter stage of voltage ratio triode is much larger, to avoid the influence that pairing approximation constant current is acted on, voltage-stabiliser tube
Need the voltage-stabiliser tube from higher clamper.
In summary, the power initiation system provided by the utility model for high withstand voltage eclipsed form DC-DC converter,
Directly from power taking in the input capacitance of main power part, without it is possible to additionally incorporate equalizer circuit, main power part partial pressure is borrowed, wider defeated
Approximate constant current output can be realized by entering in voltage range, can be by adjusting the size of flow control resistance by the circuit of approximate constant current
Power consumption assign on the resistance between each triode of protection circuit and each triode, the circuit of the system can be realized approximately
Constant current output, the setting of equalizing resistance causes input capacitance to press after approximate constant-current source shut-off;It ensure that overlapping to high withstand voltage
The startup of formula DC-DC converter, can reduce power consumption, reduce cost again.
Above to a kind of power initiation system for high withstand voltage eclipsed form DC-DC converter provided by the utility model
It is described in detail.Specific case used herein is set forth to principle of the present utility model and embodiment, with
The explanation of upper embodiment is only intended to help and understands the utility model and its core concept.It should be pointed out that for the art
Those of ordinary skill for, on the premise of the utility model principle is not departed from, can also to the utility model carry out it is some
Improve and modify, these are improved and modification is also fallen into the utility model scope of the claims.