CN208908417U - A kind of DC-DC power module - Google Patents
A kind of DC-DC power module Download PDFInfo
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- CN208908417U CN208908417U CN201821457111.5U CN201821457111U CN208908417U CN 208908417 U CN208908417 U CN 208908417U CN 201821457111 U CN201821457111 U CN 201821457111U CN 208908417 U CN208908417 U CN 208908417U
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Abstract
The utility model discloses a kind of DC-DC power modules, comprising: power supply input circuit, transforming circuit, governor circuit, rectification circuit, power switch circuit, voltage feedback circuit and linear voltage-stabilizing circuit；The input terminal of the input terminal of the power supply input circuit and the linear voltage-stabilizing circuit is connect with supply voltage, the output end of the linear voltage-stabilizing circuit is connect with the feeder ear of the governor circuit, the output end of the power supply input circuit is connect with the first input end of the transforming circuit, second input terminal of the transforming circuit is connect by the power switch circuit with the control terminal of the governor circuit, the output end of the transforming circuit is connect with the input terminal of the rectification circuit, the output end of the rectification circuit is connect with the input terminal of the voltage feedback circuit, the output end of the voltage feedback circuit is connect with the input terminal of the governor circuit.The utility model improves the stability of DC-DC power module.
Description
Technical field
The utility model relates to power technique fields, in particular to a kind of DC-DC power module.
Background technique
DC-DC power module is a kind of compact power supply switch module, it is that small-sized surface is pacified using microelectric technique
Dress integrated circuit is assembled integrally with miniature electronic component and is constituted, and is widely used in the electronics such as Aeronautics and Astronautics, airborne and radar
System regions.
DC-DC power module in the prior art generally includes input circuit, transforming circuit and rectification circuit, input electricity
After the voltage signal of input is carried out transformation through transforming circuit by road, it is fed through rectification circuit, by rectification circuit to receiving
Signal exports after carrying out rectifying and wave-filtering, to power to external power supply unit.
But above-mentioned DC-DC power module is without feed circuit, when DC-DC power module because extraneous a variety of causes believes voltage
When number fluctuation, the voltage signal after rectifying and wave-filtering can unstable, at this moment again to the power supply of external power supply equipment when, be easy to burn out outside
Power supply unit, that is to say, that DC-DC power module stability in the prior art is poor.
Summary of the invention
In view of this, the present invention provides a kind of DC-DC power modules, and which raises the stabilizations of DC-DC power module
Property.
The utility model is solved the above problems by following technological means:
A kind of DC-DC power module of the utility model, comprising: power supply input circuit, transforming circuit, governor circuit, whole
Current circuit, power switch circuit, voltage feedback circuit and linear voltage-stabilizing circuit；The input terminal of the power supply input circuit and described
The input terminal of linear voltage-stabilizing circuit is connect with supply voltage, the output end of the linear voltage-stabilizing circuit and the governor circuit
Feeder ear connection, the output end of the power supply input circuit are connect with the first input end of the transforming circuit, the transformation electricity
Second input terminal on road is connect by the power switch circuit with the control terminal of the governor circuit, the transforming circuit it is defeated
Outlet is connect with the input terminal of the rectification circuit, the input terminal of the output end of the rectification circuit and the voltage feedback circuit
Connection, the output end of the voltage feedback circuit are connect with the input terminal of the governor circuit.
Further, the governor circuit includes the main control chip of model LM5021.
Further, the linear voltage-stabilizing circuit includes resistance R1, resistance R2, resistance R3, tri- pole zener diode D1, NPN
Pipe and capacitor C1, one end of the resistance R1 and one end of resistance R2 are connect with supply voltage, the other end of the resistance R1
It is connect respectively with the collector of one end of the resistance R3, the other end of the resistance R2 and NPN triode, the resistance R3's
The other end is connect with the cathode of the base stage of NPN triode and zener diode D1 respectively, the emitter of NPN triode respectively with master
The feeder ear of control circuit is connected with one end of capacitor C1, and the other end of capacitor C1 and the anode of zener diode D1 are grounded.
Further, the transforming circuit includes transformer T, and the power supply input circuit includes capacitor C2 and capacitor C10；Institute
One end of one end and capacitor C10 for stating capacitor C2 is connect with supply voltage, and primary coil of the supply voltage also with transformer T
One end connection, the other end of the primary coil of transformer T connect with the input terminal of the power switch circuit, and capacitor C2's is another
The other end of one end and capacitor C10 are grounded.
Further, the rectification circuit includes diode D3, diode D4, capacitor C6, capacitor C7, capacitor C8, capacitor C9
Connect with the anode of inductance L, the diode D3 with one end of the secondary coil of transformer T, the cathode of diode D3 respectively with
The anode of diode D4, one end of capacitor C6, capacitor C7 one end connected with one end of inductance L, the other end of inductance L respectively with
One end of C8 is connected with one end of C9, the cathode of diode D4, the other end of the secondary coil of transformer T, capacitor C6 it is another
The other end at end, the other end of capacitor C7, the other end of capacitor C8 and capacitor C9 is grounded, and one end of capacitor C9 is as DC-
The cathode output end of DC power module.
Further, the voltage feedback circuit includes pressure stabilizing reference circuit, bleeder circuit, clutter absorbing circuit and optical coupling
Device；The input terminal of the pressure stabilizing reference circuit and the input terminal of bleeder circuit are connect with the cathode output end of rectification circuit, and
The input terminal of the bleeder circuit also passes through resistance R21 and connect with photo-coupler；The input terminal of the clutter absorbing circuit and institute
The press bond that divides of bleeder circuit is stated, the output end of the clutter absorbing circuit is grounded by zener diode D5, and clutter is inhaled
The output end for receiving circuit is also connect with photo-coupler, the output end of pressure stabilizing reference circuit and the output end ground connection of bleeder circuit.
Further, the pressure stabilizing reference circuit includes resistance R11, capacitor C3 and diode D5, one end of the resistance R11
Connect with one end of capacitor C9 with one end of capacitor C3, the other end of the resistance R11 respectively with one end of capacitor C9 and two
The cathode of pole pipe D5 connects, the plus earth of diode D5.
Further, the bleeder circuit includes resistance R4, resistance R31 and capacitor C4, one end of the resistance R31 and capacitor
One end of C9 connects, and one end of the resistance R31 also passes through resistance R21 and the 4th pin of photo-coupler connects, the resistance
The other end of R31 is connect with one end of one end of resistance R4 and capacitor C4 respectively, the other end and zener diode D6 of capacitor C4
Cathode connection, the anode of zener diode D6 and the other end of resistance R4 are grounded.
Further, the clutter absorbing circuit includes resistance R41 and capacitor C5, and one end of the capacitor C5 is connected to resistance
On the route that R31 is connect with resistance R4, the other end of capacitor C5 by resistance R41 respectively with the cathode and light of zener diode D6
3rd pin of coupler connects；1st pin of the photo-coupler is connect with the input terminal of the governor circuit, the optocoupler
2nd pin of clutch is grounded.
Further, the power switch circuit includes that the grid of resistance R5, resistance R6 and switching tube Q, the switching tube Q are logical
Resistance R6 is crossed to connect with the PWM control terminal of the governor circuit, the armature winding of the drain electrode and transformer T of the switching tube Q
Other end connection, the source electrode of the switching tube Q are grounded by resistance R5.
A kind of DC-DC power module of the utility model has the advantages that
The utility model provides a kind of DC-DC power module, and master control electricity is increased on the basis of original power module
Road, voltage feedback circuit and power switch circuit, concrete operating principle are as follows: the voltage signal of power supply input circuit output is through transformation
It after circuit is depressured, is input in rectification circuit and carries out rectifying and wave-filtering, the voltage signal after rectifying and wave-filtering is input to voltage
Feed circuit is carried out the voltage signal after rectifying and wave-filtering by voltage feedback circuit to be sent into power switch electricity after sampling and pressure stabilizing
Road, the signal after this sampling and pressure stabilizing is input to governor circuit again by power switch circuit, defeated to transforming circuit by governor circuit
The voltage for entering end is controlled, and the voltage signal after finally making rectifying and wave-filtering is stable voltage signal, then is external power supply
When equipment is powered, it can guarantee the safety of external power supply equipment, improve the stability of DC-DC power module；In addition, this is practical
It is novel to also add linear voltage-stabilizing circuit, it is powered for being individually for governor circuit, so that governor circuit is not by power input
Circuit provides voltage, and linear voltage-stabilizing circuit can be designed for the voltage range of governor circuit itself, guarantees governor circuit energy
It is enough to work in the normal voltage range of itself, further improve the stability of DC-DC power module.
Detailed description of the invention
The utility model is further described with reference to the accompanying drawings and examples.
Fig. 1 is a kind of schematic block circuit diagram of DC-DC power module of the utility model；
Fig. 2 is a kind of circuit diagram of DC-DC power module of the utility model.
Specific embodiment
The utility model is described in detail below with reference to attached drawing, as shown in Figure 1: a kind of DC-DC of the present embodiment
Power module include: power supply input circuit 10, transforming circuit 11, governor circuit 12, rectification circuit 13, power switch circuit 14,
Voltage feedback circuit 15 and linear voltage-stabilizing circuit 16；The input terminal and the linear voltage-stabilizing circuit 16 of the power supply input circuit 10
Input terminal connect with supply voltage, the feeder ear of the output end of the linear voltage-stabilizing circuit 16 and the governor circuit 12 connects
It connects, the output end of the power supply input circuit 10 is connect with the first input end of the transforming circuit 11, the transforming circuit 11
The second input terminal connect by the power switch circuit 14 with the control terminal of the governor circuit 12, the transforming circuit 11
Output end connect with the input terminal of the rectification circuit 13, the output end of the rectification circuit 13 and the voltage feedback circuit
15 input terminal connection, the output end of the voltage feedback circuit 15 are connect with the input terminal of the governor circuit 12.
Further, the governor circuit 12 includes the main control chip of model LM5021.
Further, as shown in Fig. 2, the linear voltage-stabilizing circuit 16 includes resistance R1, resistance R2, resistance R3, pressure stabilizing two
Pole pipe D1, NPN triode and capacitor C1, one end of the resistance R1 and one end of resistance R2 are connect with supply voltage, described
The other end of resistance R1 connects with the collector of one end of the resistance R3, the other end of the resistance R2 and NPN triode respectively
It connects, the other end of the resistance R3 is connect with the cathode of the base stage of NPN triode and zener diode D1 respectively, NPN triode
Emitter connect respectively with one end of the feeder ear of governor circuit 12 and capacitor C1, the other end and zener diode of capacitor C1
The anode of D1 is grounded.
Specifically, resistance R1 and resistance R3 forms bleeder circuit, the voltage after partial pressure is for driving NPN triode, pressure stabilizing
Diode D1 plays the role of burning voltage, and capacitor C1 is for the voltage VCC that linear voltage-stabilizing circuit 16 exports to be filtered.
It should be noted that the value of each component is needed according to main control chip LM5021's in specific linear voltage-stabilizing circuit 16
Operating voltage range is determined, the work of voltage signal and main control chip LM5021 that linear voltage-stabilizing circuit 16 is exported
Make voltage range matching, guarantees that main control chip LM5021 can work in entire operating voltage range, including low pressure and high pressure.
Further, as shown in Fig. 2, the transforming circuit 11 includes transformer T, the power supply input circuit 10 includes electricity
Hold C2 and capacitor C10；One end of the capacitor C2 and one end of capacitor C10 are connect with supply voltage, and supply voltage also with
One end of the primary coil of transformer T connects, and the other end of the primary coil of transformer T is defeated with the power switch circuit 14
Enter end connection, the other end of capacitor C2 and the other end of capacitor C10 are grounded.
Specifically, the primary coil of transformer T receives the voltage signal that power supply input circuit 10 exports, and will receive
Voltage signal is depressured, then the voltage signal after decompression is input to rectification circuit again by the voltage signal after being depressured
In 13.
Further, as shown in Fig. 2, the rectification circuit 13 include diode D3, diode D4, capacitor C6, capacitor C7,
Capacitor C8, capacitor C9 and inductance L, the anode of the diode D3 are connect with one end of the secondary coil of transformer T, diode D3
Cathode connect respectively with one end of the anode of diode D4, one end of capacitor C6, one end of capacitor C7 and inductance L, inductance L's
The other end is connect with one end of one end of C8 and C9 respectively, the cathode of diode D4, the secondary coil of transformer T the other end,
The other end of capacitor C6, the other end of capacitor C7, the other end of capacitor C8 and capacitor C9 the other end be grounded, and capacitor C9
Cathode output end of the one end as DC-DC power module.
Specifically, needing to pass through diode at this time since the voltage signal that transformer T coupling comes is ac voltage signal
Ac voltage signal is rectified into d. c. voltage signal, capacitor C6, capacitor C7, capacitor C8, capacitor C9 and electricity by D3 and diode D4
Feel L and form π type filter circuit, for being filtered to d. c. voltage signal, so that filtered d. c. voltage signal is more flat
It is sliding.
Further, as shown in Figure 1, the voltage feedback circuit 15 include pressure stabilizing reference circuit 151, bleeder circuit 152,
Clutter absorbing circuit 153 and photo-coupler 154；The input terminal of the pressure stabilizing reference circuit 151 and the input terminal of bleeder circuit 152
It is connect with the cathode output end of rectification circuit 13, and the input terminal of the bleeder circuit 152 also passes through resistance R21 and optical coupling
Device 154 connects；The press bond that divides of the input terminal of the clutter absorbing circuit 153 and the bleeder circuit 152, the clutter are inhaled
Receive circuit 153 output end be grounded by zener diode D5, and the output end of clutter absorbing circuit 153 also with photo-coupler
154 connections, the output end of pressure stabilizing reference circuit 151 and the output end ground connection of bleeder circuit 152.
In the present embodiment, as shown in Fig. 2, the pressure stabilizing reference circuit 151 includes resistance R11, capacitor C3 and diode D5,
One end of the resistance R11 and one end of capacitor C3 are connect with one end of capacitor C9, the other end of the resistance R11 respectively with
One end of capacitor C9 is connected with the cathode of diode D5, the plus earth of diode D5.
Specifically, resistance R11, capacitor C3 and diode D5 form pressure stabilizing reference circuit 151, for rectification circuit 13 is defeated
D. c. voltage signal out carries out pressure stabilizing.
In the present embodiment, as shown in Fig. 2, the bleeder circuit 152 includes resistance R4, resistance R31 and capacitor C4, the electricity
One end of resistance R31 is connect with one end of capacitor C9, and one end of the resistance R31 also passes through resistance R21 and the 4th of photo-coupler the and draws
Foot connection, the other end of the resistance R31 are connect with one end of one end of resistance R4 and capacitor C4 respectively, the other end of capacitor C4
It is connect with the cathode of zener diode D6, the anode of zener diode D6 and the other end of resistance R4 are grounded.
Specifically, resistance R4 and resistance R31 sample the d. c. voltage signal that rectification circuit 13 exports, and will sampling
The voltage signal obtained afterwards is filtered through capacitor C4.
In the present embodiment, as shown in Fig. 2, the clutter absorbing circuit 153 includes resistance R41 and capacitor C5, the capacitor
One end of C5 is connected on the route that resistance R31 is connect with resistance R4, the other end of capacitor C5 by resistance R41 respectively with pressure stabilizing
The cathode of diode D6 is connected with the 3rd pin of photo-coupler；1st pin of the photo-coupler is defeated with the governor circuit
Enter end connection, the 2nd pin ground connection of the photo-coupler.
Specifically, resistance R41 and capacitor C5 forms clutter absorbing circuit 153, divided for absorption resistance R4 and resistance R31
The noise signal in voltage signal afterwards, and by absorb clutter after voltage signal and zener diode D6 inside reference voltage
It is compared, when determining the reference voltage difference inside voltage signal and zener diode D6 after absorbing clutter, then passes through
Comparison result is sent to main control chip LM5021 by photo-coupler.
Further, described as shown in Fig. 2, the power switch circuit 14 includes resistance R5, resistance R6 and switching tube Q
The grid of switching tube Q is connect by resistance R6 with the PWM control terminal of the governor circuit, the drain electrode and transformation of the switching tube Q
The other end of the armature winding of device T connects, and the source electrode of the switching tube Q is grounded by resistance R5.
Specifically, main control chip LM5021 drives resistance R6 after receiving comparison result, through PWM control terminal, in turn
So that switching tube Q is connected, and controls the voltage signal of transformer T input terminal according to the pwm signal of output, finally to rectify
The d. c. voltage signal that circuit 13 exports is steady dc voltage signal, wherein resistance R5 is for sampling switch pipe Q source electrode
Current signal, and collected current signal is fed back into main control chip LM5021, current loop is formed, master control chip is made
LM5021 realizes the control to entire circuit according to the signal output pwm signal of feedback.
The utility model provides a kind of DC-DC power module, and master control electricity is increased on the basis of original power module
Road 12, voltage feedback circuit 15 and power switch circuit 14, concrete operating principle are as follows: the voltage letter that power supply input circuit 10 exports
After number being depressured through transforming circuit 11, it is input in rectification circuit 13 and carries out rectifying and wave-filtering, the voltage letter after rectifying and wave-filtering
Number be input to voltage feedback circuit 15, by voltage feedback circuit 15 by the voltage signal after rectifying and wave-filtering carry out sampling and pressure stabilizing it
It is sent into power switch circuit 14 afterwards, the signal after this sampling and pressure stabilizing is input to governor circuit 12 again by power switch circuit 14,
It is controlled by voltage of the governor circuit 12 to transforming circuit input terminal, the voltage signal after finally making rectifying and wave-filtering is to stablize
Voltage signal, then for external power supply equipment power supply when, can guarantee the safety of external power supply equipment, improve DC-DC power source
The stability of module；In addition, the utility model also adds linear voltage-stabilizing circuit 16, supplied for being individually for governor circuit 12
Electricity can be directed to the voltage range of governor circuit 12 itself so that governor circuit 12 does not provide voltage by power supply input circuit 10
It designs linear voltage-stabilizing circuit 16, guarantees that governor circuit 12 can work in the normal voltage range of itself, further
Improve the stability of DC-DC power module.
Finally, it is stated that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, those skilled in the art should understand that, it can be to this
The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model
It encloses, should all cover in the scope of the claims of the utility model.
Claims (10)
1. a kind of DC-DC power module, it is characterised in that: include: power supply input circuit, transforming circuit, governor circuit, rectified current
Road, power switch circuit, voltage feedback circuit and linear voltage-stabilizing circuit；
The input terminal of the input terminal of the power supply input circuit and the linear voltage-stabilizing circuit is connect with supply voltage, the line
Property voltage regulator circuit output end connect with the feeder ear of the governor circuit, the output end of the power supply input circuit and the change
The first input end of volt circuit connects, and the second input terminal of the transforming circuit passes through the power switch circuit and the master control
The control terminal of circuit connects, and the output end of the transforming circuit is connect with the input terminal of the rectification circuit, the rectification circuit
Output end connect with the input terminal of the voltage feedback circuit, the output end of the voltage feedback circuit and the governor circuit
Input terminal connection.
2. a kind of DC-DC power module according to claim 1, it is characterised in that: the governor circuit includes model
The main control chip of LM5021.
3. a kind of DC-DC power module according to claim 2, it is characterised in that: the linear voltage-stabilizing circuit includes electricity
Hinder R1, resistance R2, resistance R3, zener diode D1, one end of NPN triode and capacitor C1, the resistance R1 and resistance R2
One end is connect with supply voltage, the other end of the resistance R1 respectively with one end of the resistance R3, the resistance R2 it is another
One end is connected with the collector of NPN triode, the other end of the resistance R3 respectively with two pole of the base stage of NPN triode and pressure stabilizing
The cathode of pipe D1 connects, and the emitter of NPN triode is connect with one end of the feeder ear of governor circuit and capacitor C1 respectively, capacitor
The other end of C1 and the anode of zener diode D1 are grounded.
4. a kind of DC-DC power module according to claim 3, it is characterised in that: the transforming circuit includes transformer
T, the power supply input circuit include capacitor C2 and capacitor C10；
One end of the capacitor C2 and one end of capacitor C10 are connect with supply voltage, and supply voltage is also first with transformer T
One end connection of grade coil, the other end of the primary coil of transformer T are connect with the input terminal of the power switch circuit, capacitor
The other end of C2 and the other end of capacitor C10 are grounded.
5. a kind of DC-DC power module according to claim 4, it is characterised in that: the rectification circuit includes diode
D3, diode D4, capacitor C6, capacitor C7, capacitor C8, the anode of capacitor C9 and inductance L, the diode D3 and transformer T
One end of secondary coil connects, the cathode of diode D3 respectively with the anode of diode D4, one end of capacitor C6, capacitor C7 one
End is connected with one end of inductance L, and the other end of inductance L is connect with one end of one end of C8 and C9 respectively, the cathode of diode D4,
The other end of the secondary coil of transformer T, the other end of capacitor C6, the other end of capacitor C7, capacitor C8 the other end and capacitor
The other end of C9 is grounded, and cathode output end of the one end of capacitor C9 as DC-DC power module.
6. a kind of DC-DC power module according to claim 5, it is characterised in that: the voltage feedback circuit includes steady
Press reference circuit, bleeder circuit, clutter absorbing circuit and photo-coupler；
The input terminal of the pressure stabilizing reference circuit and the input terminal of bleeder circuit are connect with the cathode output end of rectification circuit, and
The input terminal of the bleeder circuit also passes through resistance R21 and connect with photo-coupler；The input terminal of the clutter absorbing circuit and institute
The press bond that divides of bleeder circuit is stated, the output end of the clutter absorbing circuit is grounded by zener diode D5, and clutter is inhaled
The output end for receiving circuit is also connect with photo-coupler, the output end of pressure stabilizing reference circuit and the output end ground connection of bleeder circuit.
7. a kind of DC-DC power module according to claim 6, it is characterised in that:
The pressure stabilizing reference circuit includes one end and the capacitor C3 of resistance R11, capacitor C3 and diode D5, the resistance R11
One end is connect with one end of capacitor C9, the other end of the resistance R11 yin with one end of capacitor C9 and diode D5 respectively
Pole connection, the plus earth of diode D5.
8. a kind of DC-DC power module according to claim 7, it is characterised in that: the bleeder circuit include resistance R4,
Resistance R31 and capacitor C4, one end of the resistance R31 are connect with one end of capacitor C9, and one end of the resistance R31 also passes through electricity
The 4th pin for hindering R21 and photo-coupler connects, the other end of the resistance R31 respectively with one end of resistance R4 and capacitor C4
One end connection, the other end of capacitor C4 connect with the cathode of zener diode D6, the anode of zener diode D6 and resistance R4's
The other end is grounded.
9. a kind of DC-DC power module according to claim 8, it is characterised in that:
The clutter absorbing circuit includes resistance R41 and capacitor C5, and one end of the capacitor C5 is connected to resistance R31 and resistance R4
On the route of connection, the other end of capacitor C5 by resistance R41 respectively with the cathode of zener diode D6 and photo-coupler the 3rd
Pin connection；1st pin of the photo-coupler is connect with the input terminal of the governor circuit, and the 2nd of the photo-coupler is drawn
Foot ground connection.
10. a kind of DC-DC power module according to claim 9, it is characterised in that: the power switch circuit includes electricity
The grid for hindering R5, resistance R6 and switching tube Q, the switching tube Q is connected by the PWM control terminal of resistance R6 and the governor circuit
It connects, the drain electrode of the switching tube Q is connect with the other end of the armature winding of transformer T, and the source electrode of the switching tube Q passes through resistance
R5 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821457111.5U CN208908417U (en) | 2018-09-06 | 2018-09-06 | A kind of DC-DC power module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821457111.5U CN208908417U (en) | 2018-09-06 | 2018-09-06 | A kind of DC-DC power module |
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| CN208908417U true CN208908417U (en) | 2019-05-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194134A (en) * | 2018-09-06 | 2019-01-11 | 西安锐晶微电子有限公司 | A kind of DC-DC power module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194134A (en) * | 2018-09-06 | 2019-01-11 | 西安锐晶微电子有限公司 | A kind of DC-DC power module |
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