CN2650194Y - Switch power supply adaptor - Google Patents
Switch power supply adaptor Download PDFInfo
- Publication number
- CN2650194Y CN2650194Y CN 03226242 CN03226242U CN2650194Y CN 2650194 Y CN2650194 Y CN 2650194Y CN 03226242 CN03226242 CN 03226242 CN 03226242 U CN03226242 U CN 03226242U CN 2650194 Y CN2650194 Y CN 2650194Y
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- circuit
- switch
- electric parameter
- calculation process
- pulse
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Abstract
The utility model discloses a switch power supply adapter, which has a step-up electronic switch and a step-down electronic switch respectively electrically connected with a pulse width modulation and a drive circuit, the drive signals emitted from the pulse width modulation and the drive circuit drive the switch; both the pulse width modulation and the drive circuit are electrically connected with an arithmetic processing and a control circuit, the arithmetic processing and control circuit fulfills the arithmetic processing for electrical parameter signals fed back, generates two relevant control signals to both the pulse width modulation and the drive circuit according to the high and low voltage. At any moment, only one of the step-up or step-down electronic switches is in the switching state, another one is in the NO or NC state to reduce the loss, realize the coordination and high working efficiency of the whole circuit.
Description
Technical field
The utility model relates to switch power source adapter, the switch power source adapter that especially boost, buck functionality has both.
Background technology
That switch power source adapter has is small and exquisite, multi-functional, many advantages such as high conversion rate especially, replaces the low linear stabilized power supply of conversion efficiency gradually, is favored by people.Existing switch power source adapter can be divided into following three kinds by the function of lifting or reduction voltage: simple booster type, simple voltage-dropping type and buck have both type.Wherein, buck has both the type switch power source adapter boosts and buck functionality owing to having, and it is more convenient than handing over to use, and is just used more and more widely.
Existing buck have both the general employing of type switch power source adapter boost earlier mode that step-down again or first step-down boost again realize having both simultaneously boost, two kinds of functions of step-down.Its inside all comprises the electronic switch of at least two non-parallel connections, is responsible for respectively inner boosting, step-down and electric energy transmitting.No matter be in the still step-down working method of boosting, booster circuit that it is inner and reduction voltage circuit all are in the switch transition state at synchronization.That is to say that when needs promoted input voltage, booster circuit was in the switch transition state, reduction voltage circuit also is in the switch transition state; When needs carried out step-down to input voltage, reduction voltage circuit was in the switch transition state, and booster circuit also is in the switch transition state, and we only need it to realize a kind of function at synchronization.It is at being not to boost or to need the different situations of step-down to handle respectively, but adopts the working method of simplification.Boost and step-down be two kinds of opposite effects, both work simultaneously and certainly will cause two parts circuit to tie down mutually, influence the work efficiency of circuit integral body; And because the switching loss that switch motion produces is the main cause of switch power source adapter working loss, its total switching loss will inevitably increase exponentially, and so Zheng Ti loss just increases greatly, and work efficiency will be lower.
The utility model content
The purpose of this utility model is exactly that a kind of switch power source adapter that reduces the wastage, improves conversion efficiency will be provided.
For reaching above-mentioned purpose, the utility model adopts following technical scheme: boost electronic switch and electronic pressure switch are electrically connected with separately pulse-length modulation and driving circuit respectively, the drive switch motion of being sent by separately pulse-length modulation and driving circuit; This two pulse-length modulation and driving circuit are electrically connected with a calculation process and control circuit, this calculation process and control circuit carry out calculation process to feedback electric parameter signal, just generate the two-way control signal corresponding to described two pulse-length modulations and driving circuit according to its voltage.
Described calculation process and control circuit also are connected with the electric parameter error feedback circuit, and the electric parameter error feedback circuit also is connected with output circuit and reference voltage source respectively; Described feedback electric parameter signal is will be compared the error signal of generation by output circuit electric parameter that feeds back and the reference voltage that is provided by reference voltage source by the electric parameter error feedback circuit.
Switch power source adapter of the present utility model is work like this: the voltage of output terminal, current parameter are sent to the electric parameter error feedback circuit, by the electric parameter error feedback circuit reference voltage that itself and reference voltage source provide is compared, produce corresponding error feedback signal, and deliver to calculation process and control circuit; Calculation process and control circuit carry out calculation process according to the expectant control rule to error feedback signal, just generate pulse-length modulation of two-way control signal corresponding to two and driving circuit according to its voltage, and driving circuit is controlled the action of two electronic switches.
The utility model is owing to increased special calculation process and control circuit, and the duty cycle of switching of controlling two electronic switches effectively reaches often to be opened or normally off.Export electric weight from input circuit to output circuit in control, the final electric parameter (output voltage, output current) of output terminal of adjusting is when reaching setting value, guarantee that synchronization only has an electronic switch to work on off state, and another electronic switch is in Chang Kai or normally closed stationary state, has reduced whole switching loss effectively.Boost, reduction voltage circuit is under the unified control of calculation process and control circuit, carrying out the mode of alternative formula works, in synchronization only boosts electronic switch or electronic pressure switch arbitrarily one of them is on off state, another then is in Chang Kai or normally off, avoided meaningless loss, realize circuit integral body coordination, work efficiently.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described in detail.
Fig. 1 is the circuit block diagram of switch power source adapter of the present utility model.
Fig. 2 be boost, the duty graph of a relation of step-down two electronic switches.
Embodiment
As shown in Figure 1, input circuit 1 is connected with electronic pressure switch 2, and electronic pressure switch 2 is connected with energy-storage travelling wave tube 3; When energy-storage travelling wave tube 3 is connected with output circuit 4, be connected with the electronic switch 5 that boosts of ground connection; Output circuit 4 is connected with electric parameter error feedback circuit 8 again.On the other hand, reference voltage source 9 is connected with electric parameter error feedback circuit 8, and electric parameter error feedback circuit 8 is connected with calculation process and control circuit 6 again; Calculation process and control circuit 6 are connected with electronic pressure switch 2, are connected with the electronic switch that boosts by pulse width modulation circuit 7b by pulse width modulation circuit 7a.
Electric parameter error feedback circuit 8 detects the electric parameter (detecting two parameters of voltage, electric current of output terminal in the present embodiment) of output, compare with the reference voltage that provides by reference voltage source 9 with certain precision, error is wherein pressed the error feedback signal that the certain voltage amplitude was handled and produced to certain mode (as positive amplification, integration etc.), deliver to calculation process and control circuit 6.Calculation process and control circuit 6 produce two control signal a, control signal b that are suitable for controlling object with the error feedback signal of input after by the certain calculation rule treatments, and deliver to corresponding pulse-length modulation and driving circuit 7a, 7b.Pulse-length modulation and driving circuit 7a, 7b produce under the effect of control signal a, b enough and to promote electronic switch and do of speed-sensitive switch action and decide drive signal a, drive signal b frequency, that duty cycle of switching is variable, move by regular drive two electronic switches shown in Figure 2.
As shown in Figure 2, all boost and the step-down process all changes and does reciprocating action successively along with the time.When one of them electronic switch 5 or 2 is on off state, another electronic switch 2 or 5 are in normally closed or normally open, that is to say that synchronization has only an electronic switch 5 or 2 in running order, another electronic switch 2 or 5 is in Chang Kai or normally closed stationary state, thereby reach the minimizing loss, the purpose of raising the efficiency.
Claims (2)
1, a kind of switch power source adapter, comprise and control electronic switch that boosts (5) that boosts and the electronic pressure switch (2) of controlling step-down, it is characterized in that: the electronic switch that boosts (5) and electronic pressure switch (2) are connected with separately pulse-length modulation and driving circuit (7a, 7b) respectively, the drive switch motion of being sent by separately pulse-length modulation and driving circuit (7a, 7b); This two pulse-length modulation and driving circuit (7a, 7b) are electrically connected with a calculation process and control circuit (6), this calculation process and control circuit (6) carry out calculation process to feedback electric parameter signal, just generate the two-way control signal corresponding to described two pulse-length modulations and driving circuit (7a, 7b) according to its voltage.
2, switch power source adapter according to claim 1, it is characterized in that: described calculation process and control circuit (6) also are connected with electric parameter error feedback circuit (8), and electric parameter error feedback circuit (8) also is connected with output circuit (4) and reference voltage source (9) respectively; Described feedback electric parameter signal is will be compared the error signal of generation by output circuit (4) electric parameter that feeds back and the reference voltage that is provided by reference voltage source (9) by electric parameter error feedback circuit (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03226242 CN2650194Y (en) | 2003-05-20 | 2003-05-20 | Switch power supply adaptor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03226242 CN2650194Y (en) | 2003-05-20 | 2003-05-20 | Switch power supply adaptor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2650194Y true CN2650194Y (en) | 2004-10-20 |
Family
ID=34326017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03226242 Expired - Fee Related CN2650194Y (en) | 2003-05-20 | 2003-05-20 | Switch power supply adaptor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2650194Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011098000A1 (en) * | 2010-02-11 | 2011-08-18 | 北京联想软件有限公司 | Power adapter and portable computer |
| CN102736718A (en) * | 2011-04-11 | 2012-10-17 | 深圳市凯丰达科技有限公司 | Pulse width modulation switching power supply |
-
2003
- 2003-05-20 CN CN 03226242 patent/CN2650194Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011098000A1 (en) * | 2010-02-11 | 2011-08-18 | 北京联想软件有限公司 | Power adapter and portable computer |
| CN102736718A (en) * | 2011-04-11 | 2012-10-17 | 深圳市凯丰达科技有限公司 | Pulse width modulation switching power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |