CN205725458U - A kind of SCM Based Switching Power Supply - Google Patents
A kind of SCM Based Switching Power Supply Download PDFInfo
- Publication number
- CN205725458U CN205725458U CN201620336156.1U CN201620336156U CN205725458U CN 205725458 U CN205725458 U CN 205725458U CN 201620336156 U CN201620336156 U CN 201620336156U CN 205725458 U CN205725458 U CN 205725458U
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- circuit
- power supply
- chip microcomputer
- stc single
- voltage
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Abstract
A kind of SCM Based Switching Power Supply, relates to Switching Power Supply.It is provided with STC single-chip microcomputer, synchronizes BUCK circuit, IR2104 circuit, accessory power supply and set of cells；STC single-chip microcomputer is powered by accessory power supply, synchronize BUCK electric routing battery group to power, set of cells is connected on the ADC of STC single-chip microcomputer by current detection circuit and voltage detecting circuit, synchronize BUCK circuit to be connected on STC single-chip microcomputer by voltage detecting circuit, being connected by IR2104 circuit between STC single-chip microcomputer with Tong Bu BUCK circuit, STC single-chip microcomputer is also associated with key circuit and liquid crystal display circuit.Adjustable resistor is not used to regulate, directly by Single-chip Controlling, display can input and the current/voltage situation of output, monitor the running of power supply in real time, pre-set output voltage can be set through key number, accurate setting voltage can be obtained, conversion efficiency is high, low in energy consumption, and output accuracy is high, adjustable extent is big, and output is stable.
Description
Technical field
This utility model relates to Switching Power Supply, especially relates to a kind of SCM Based Switching Power Supply.
Background technology
In the life of reality and experiment, being often required to use various power supply, voltage request is various.How to design one
Voltage stabilization, output voltage precision is high, and the voltage source that range of accommodation is big, has become the focus of application of electronic technology.In market
On, various power supply products are of all kinds, have adjustable and fixing.But generally there are some problems, as conversion efficiency is low,
Power consumption is big, and output accuracy is the highest, and adjustable extent is too small, it is impossible to meet the requirement of specific voltage, and output is not sufficiently stable, ripple electricity
Flow through big, and the regulation of commonly used adjustable resistor, operation easier is big, easy to wear aging.
Summary of the invention
The purpose of this utility model is the problems referred to above existed for prior art, it is provided that one is SCM Based to be opened
Close power supply.
This utility model is provided with STC single-chip microcomputer, synchronizes BUCK circuit, IR2104 circuit, accessory power supply and set of cells；
Described STC single-chip microcomputer is powered by accessory power supply, and described synchronization BUCK electric routing battery group is powered, and described set of cells is led to
Overcurrent sensing circuit and voltage detecting circuit are connected on the ADC of STC single-chip microcomputer, and described synchronization BUCK circuit passes through voltage detecting
Circuit is connected on STC single-chip microcomputer, is connected by IR2104 circuit between described STC single-chip microcomputer with Tong Bu BUCK circuit, described
STC single-chip microcomputer is also associated with key circuit and liquid crystal display circuit.
Described set of cells can use 5 joint 18650 batteries to constitute.
The electric current that described set of cells provides can be 1～2A.
Described STC single-chip microcomputer can use STC12C5A60S2 single-chip microcomputer.
Described accessory power supply can provide 5V voltage.
Compared with prior art, the beneficial effects of the utility model are:
Use STC12C5A60S2 single-chip microcomputer that the pwm pulse signal of 47kHz occurs, control synchronous rectification through IR2104
BUCK circuit.10 ADC carried inside single-chip microcomputer can pass through measure voltage & current electric current Real-time Feedback electric current and voltage value,
Make Switching Power Supply hardware more intelligent, do not use adjustable resistor to regulate, directly by Single-chip Controlling, can show input with
The current/voltage situation of output, monitors the running of power supply in real time, can arrange pre-set output voltage through key number, can obtain
To accurate setting voltage, conversion efficiency is high, low in energy consumption, and output accuracy is high, and adjustable extent is big, and output is stable.
Accompanying drawing explanation
Fig. 1 is the circuit composition frame chart of this utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in embodiment, the technical solution of the utility model is clearly and completely described, aobvious
So, described embodiment is only a part of embodiment of this utility model rather than whole embodiments.New based on this practicality
Embodiment in type, those of ordinary skill in the art can make other embodiments.
Seeing Fig. 1, this utility model embodiment includes STC single-chip microcomputer 1, synchronizes BUCK circuit 2, IR2104 circuit 3, auxiliary
Power supply 4 and 5 saves the set of cells 5 of 18650 compositions, and described STC single-chip microcomputer 1 is powered by accessory power supply 4, and STC single-chip microcomputer 1 uses
STC12C5A60S2 single-chip microcomputer, the set of cells 5 that described synchronization BUCK circuit 2 is made up of 5 joints 18650 is for 5V voltage, described battery
The electric current of group 5 offer is 1～2A, and described set of cells 5 is connected to STC single-chip microcomputer by current detection circuit 6 and voltage detecting circuit 7
On the ADC of 1, described synchronization BUCK circuit 2 is connected on STC single-chip microcomputer 1 by voltage detecting circuit 7, described STC single-chip microcomputer 1
Being connected by IR2104 circuit 3 with between Tong Bu BUCK circuit 2, described STC single-chip microcomputer 1 is also associated with key circuit 8 and liquid crystal
Display circuit 9.
(1) BUCK circuit: DC/DC conversion is that intrinsic DC voltage is converted into adjustable voltage, is called again
DC chopped-wave.It has various topological structures, and native system application is BUCK (Buck conversion circuit) type DC-DC, and it is special
Levy the voltage ratio input voltage being to export low.The operation principle of its circuit is: when metal-oxide-semiconductor or triode ON the longest the longest time
After between, in the case of all components and parts are all in a kind of perfect condition, now the voltage of electric capacity can be equal to the voltage of input.
(2) STC single-chip microcomputer: have special integrated reset circuit, separately has 10 the ADC conversions at a high speed of 8 tunnels, the most also has concurrently
The PWM etc. on 2 tunnels, 8051 series of the powerful remote ultra-traditional of its function.
(3) IR2104 circuit: (IR2104 half-bridge drive circuit), IR2104 is a kind of high performance half-bridge driven chip,
This chip internal is to use passive type pump lotus boosting principle.When powering on, power supply flows through fast recovery diode D and charges to electric capacity C, C
On terminal voltage quickly rise to close to VCC, if at this moment down tube conducting, C bears level and is pulled low, formed charge circuit, can quickly fill
Electricity is to close to VCC, and when PWM waveform overturns, chip exports reverse level, and down tube is ended, and upper pipe turns on, and C negative pole current potential is lifted
High to close to supply voltage, when the river rises the boat goes up, and C anodic potentials is the most more than VCC supply voltage.Because there being the existence of D, this voltage is not
Can flow backwards to power supply, the high-pressure side suspension drive circuit that C now starts inside chip is powered, and the terminal voltage on C is charged to height
In the VCC of power supply high pressure, as long as upper down tube turns on the most in turn and ends, C will constantly supply to high-pressure side suspension drive circuit
Electricity, makes the moment that pipe is opened, and high-pressure side suspension drive circuit voltage is always more than the S pole of upper pipe.This chip is used to reduce
The design of integrated circuit, as long as electric capacity C selects appropriate, this circuit is stable.
Use STC12C5A60S2 single-chip microcomputer that the pwm pulse signal of 47kHz occurs, control synchronous rectification through IR2104
BUCK circuit.10 ADC carried inside single-chip microcomputer can pass through measure voltage & current electric current Real-time Feedback electric current and voltage value,
Make Switching Power Supply hardware more intelligent, do not use adjustable resistor to regulate, directly by Single-chip Controlling, can show input with
The current/voltage situation of output, monitors the running of power supply in real time, can arrange pre-set output voltage through key number, can obtain
To accurate setting voltage, conversion efficiency is high, low in energy consumption, and output accuracy is high, and adjustable extent is big, and output is stable.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model.
Claims (5)
1. a SCM Based Switching Power Supply, it is characterised in that be provided with STC single-chip microcomputer, synchronize BUCK circuit, IR2104 electricity
Road, accessory power supply and set of cells；
Described STC single-chip microcomputer is powered by accessory power supply, and described synchronization BUCK electric routing battery group is powered, and described set of cells is by electricity
Current detection circuit and voltage detecting circuit are connected on the ADC of STC single-chip microcomputer, and described synchronization BUCK circuit passes through voltage detecting circuit
Being connected on STC single-chip microcomputer, connected by IR2104 circuit between described STC single-chip microcomputer with Tong Bu BUCK circuit, described STC is mono-
Sheet machine is also associated with key circuit and liquid crystal display circuit.
A kind of SCM Based Switching Power Supply the most as claimed in claim 1, it is characterised in that described set of cells uses 5 joints
18650 batteries are constituted.
A kind of SCM Based Switching Power Supply the most as claimed in claim 1, it is characterised in that the electricity that described set of cells provides
Stream is 1～2A.
A kind of SCM Based Switching Power Supply the most as claimed in claim 1, it is characterised in that described STC single-chip microcomputer uses
STC12C5A60S2 single-chip microcomputer.
A kind of SCM Based Switching Power Supply the most as claimed in claim 1, it is characterised in that described accessory power supply provides 5V
Voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620336156.1U CN205725458U (en) | 2016-04-20 | 2016-04-20 | A kind of SCM Based Switching Power Supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620336156.1U CN205725458U (en) | 2016-04-20 | 2016-04-20 | A kind of SCM Based Switching Power Supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205725458U true CN205725458U (en) | 2016-11-23 |
Family
ID=57297806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620336156.1U Expired - Fee Related CN205725458U (en) | 2016-04-20 | 2016-04-20 | A kind of SCM Based Switching Power Supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205725458U (en) |
-
2016
- 2016-04-20 CN CN201620336156.1U patent/CN205725458U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20180420 |