CN205725463U - A kind of DC DC multiplex output circuit - Google Patents
A kind of DC DC multiplex output circuit Download PDFInfo
- Publication number
- CN205725463U CN205725463U CN201620565426.6U CN201620565426U CN205725463U CN 205725463 U CN205725463 U CN 205725463U CN 201620565426 U CN201620565426 U CN 201620565426U CN 205725463 U CN205725463 U CN 205725463U
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- circuit
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Abstract
This utility model relates to a kind of DC DC multiplex output circuit, including main circuit, control and drive circuit and feedback circuit, main circuit includes transformator T1, transformator T2 and on-off circuit, transformator T1 and transformator T2 comprises multiple secondary windings respectively, armature winding one end of transformator T1 is connected with armature winding one end of transformator T2, the other end of transformator T1 and T2 armature winding after on-off circuit with control and the outfan of drive circuit is connected, the outfan of any one group of secondary windings of transformator T1 or transformator T2 is connected with feedback circuit input, the outfan of feedback circuit is connected with the input of control and drive circuit.This utility model to reach the purpose of multiple-channel output, uses less device, simple control mode can realize the multiple-channel output of isolation, has simple in construction, high reliability by the way of transformers connected in parallel.
Description
Technical field
This utility model relates to power electronics especially switch power technology field, is specifically related to a kind of DC-DC multichannel defeated
Go out circuit.
Background technology
Switching Power Supply is widely used in industry and national defence, at space flight, aviation, boats and ships, weapons, railway, communication, medical electric
The military-civil electronic systems such as son, industrial automation equipment are used widely.DC-DC part in power supply product the most in the world
Have become as main, most crucial part, the power supply great majority of the accurate power electronic product such as communication equipment, computer equipment
Use DC-voltage supply.
DC-DC circuit topology kind is complicated, and various informative, function emphasizes particularly on different fields, and the multiple-channel output scheme of Switching Power Supply is also
Have a lot.Under normal circumstances, multiplex output circuit can be realized by the method increasing transformer secondary output winding, but by transformation
Device power and the restriction of size, output way also has the upper limit.For some particular application, only rely on secondary windings
Increase output way and can not meet demand.
Utility model content
The purpose of this utility model is to provide that a kind of circuit structure is simple, control method simple and cost is the cheapest
Multiplex output circuit.
For achieving the above object, this utility model have employed techniques below scheme: includes main circuit, control and drive circuit
And feedback circuit, described main circuit includes that transformator T1, transformator T2 and on-off circuit, described transformator T1 and transformator T2 divide
Not comprising multiple secondary windings, armature winding one end of described transformator T1 is connected with armature winding one end of transformator T2, becomes
The other end of depressor T1 and T2 armature winding after on-off circuit with control and the outfan of drive circuit is connected, described transformator
The outfan of any one group of secondary windings of T1 or transformator T2 is connected with feedback circuit input, the outfan of feedback circuit with
Control and the input of drive circuit is connected.
Described on-off circuit is made up of metal-oxide-semiconductor Q1, the drain electrode of described metal-oxide-semiconductor Q1 and transformator T1, the primary of transformator T2
Winding one end is connected, and the source electrode of metal-oxide-semiconductor Q1 is the negative input of on-off circuit, the grid of metal-oxide-semiconductor Q1 and control and driving electricity
The outfan on road is connected.
Described on-off circuit can also be made up of metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q3, and the drain electrode of described metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q3 divides
Not being connected with armature winding one end of transformator T1 and transformator T2, after the source electrode of metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q3 is connected, conduct is opened
Close the negative input of circuit, the grid of metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q3 all with control and the outfan of drive circuit is connected.
As shown from the above technical solution, this utility model by the way of transformers connected in parallel to reach the mesh of multiple-channel output
, and have two kinds of parallel waies.Selecting a certain road in multiple-channel output as closed loop control, other roads are open loop, feedback electricity
Road sampling closed loop command signal is delivered to control and drive circuit, control chip produce pwm signal, then realized by drive circuit right
Open and the shutoff of switching tube are controlled.This utility model use less device, simple control mode can realize every
From multiple-channel output, there is the remarkable advantages such as simple in construction, reliability be high.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the first embodiment of this utility model；
Fig. 2 is the circuit theory diagrams of this utility model the second embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described further:
As it is shown in figure 1, the DC-DC multiplex output circuit of the present embodiment, including main circuit 1, control and drive circuit 3 and anti-
Current feed circuit 2, main circuit includes that transformator T1, transformator T2 and on-off circuit, transformator T1 and transformator T2 comprise multiple respectively
Secondary windings, armature winding one end of transformator T1 is connected with armature winding one end of transformator T2 the input as power supply,
The other end of transformator T1 and T2 armature winding after on-off circuit with control and the outfan of drive circuit 3 is connected, transformator
The outfan of any one group of secondary windings of T1 or transformator T2 is connected with feedback circuit 2 input, the outfan of feedback circuit 2
It is connected with the input of control and drive circuit 3.
On-off circuit in the present embodiment is made up of metal-oxide-semiconductor Q1, the drain electrode of metal-oxide-semiconductor Q1 and transformator T1, transformator T2
Armature winding one end is connected, and the source electrode of metal-oxide-semiconductor Q1 is the negative input of on-off circuit, the grid of metal-oxide-semiconductor Q1 and control and drive
The outfan on galvanic electricity road 3 is connected.
One end of the primary coil of transformator T1 or transformator T2 is connected with the positive pole of power supply, the source electrode of metal-oxide-semiconductor Q1 and electricity
The negative pole in source is connected, and the signal of sampling is delivered to control and drive circuit 3 by feedback circuit 2, control and drive circuit 3 produce
Pwm signal, then realized opening of switch tube by drive circuit and be controlled with shutoff.
As in figure 2 it is shown, the DC-DC multiplex output circuit of the present embodiment, differ only in switch with the embodiment described in Fig. 1
Circuit is different.On-off circuit in the present embodiment is made up of metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q3, and the drain electrode of metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q3 divides
Not being connected with armature winding one end of transformator T1 and transformator T2, after the source electrode of metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q3 is connected, conduct is opened
Close the negative input of circuit, the grid of metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q3 all with control and the outfan of drive circuit 3 is connected.
Embodiment described above is only to be described preferred implementation of the present utility model, not to this practicality
Novel scope is defined, and on the premise of without departing from this utility model design spirit, those of ordinary skill in the art are to this
Various deformation that the technical scheme of utility model is made and improvement, all should fall into the protection that this utility model claims determine
In the range of.
Claims (3)
1. a DC-DC multiplex output circuit, it is characterised in that: include main circuit (1), control and drive circuit (3) and feedback
Circuit (2), described main circuit includes that transformator T1, transformator T2 and on-off circuit, described transformator T1 and transformator T2 are respectively
Comprising multiple secondary windings, armature winding one end of described transformator T1 is connected with armature winding one end of transformator T2, transformation
The other end of device T1 and T2 armature winding after on-off circuit with control and the outfan of drive circuit (3) is connected, described transformation
The outfan of any one group of secondary windings of device T1 or transformator T2 is connected with feedback circuit (2) input, feedback circuit (2)
Outfan is connected with the input of control and drive circuit (3).
DC-DC multiplex output circuit the most according to claim 1, it is characterised in that: described on-off circuit is by metal-oxide-semiconductor Q1 structure
Becoming, the drain electrode of described metal-oxide-semiconductor Q1 is connected with armature winding one end of transformator T1, transformator T2, and the source electrode of metal-oxide-semiconductor Q1 is switch
The negative input of circuit, the grid of metal-oxide-semiconductor Q1 is connected with the outfan of control and drive circuit (3).
DC-DC multiplex output circuit the most according to claim 1, it is characterised in that: described on-off circuit by metal-oxide-semiconductor Q2 and
Metal-oxide-semiconductor Q3 is constituted, the drain electrode of described metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q3 respectively with armature winding one end of transformator T1 and transformator T2
Be connected, the source electrode of metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q3 be connected after as the negative input of on-off circuit, metal-oxide-semiconductor Q2's and metal-oxide-semiconductor Q3
Grid all with control and the outfan of drive circuit (3) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620565426.6U CN205725463U (en) | 2016-06-12 | 2016-06-12 | A kind of DC DC multiplex output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620565426.6U CN205725463U (en) | 2016-06-12 | 2016-06-12 | A kind of DC DC multiplex output circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205725463U true CN205725463U (en) | 2016-11-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620565426.6U Expired - Fee Related CN205725463U (en) | 2016-06-12 | 2016-06-12 | A kind of DC DC multiplex output circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205725463U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958832A (en) * | 2016-06-12 | 2016-09-21 | 合肥华耀电子工业有限公司 | DC-DC multi-path output circuit |
-
2016
- 2016-06-12 CN CN201620565426.6U patent/CN205725463U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958832A (en) * | 2016-06-12 | 2016-09-21 | 合肥华耀电子工业有限公司 | DC-DC multi-path output circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |