CN207069900U - Positive voltage turns negative electricity die block - Google Patents
Positive voltage turns negative electricity die block Download PDFInfo
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- CN207069900U CN207069900U CN201720803477.2U CN201720803477U CN207069900U CN 207069900 U CN207069900 U CN 207069900U CN 201720803477 U CN201720803477 U CN 201720803477U CN 207069900 U CN207069900 U CN 207069900U
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Abstract
The utility model discloses a kind of positive voltage to turn negative electricity die block, it is desirable to provide plants cheap positive voltage simple, that stability is high, easy startup and noise ripple are small and turns negative electricity die block.The utility model includes the first electrochemical capacitor, the second electrochemical capacitor, the first electric capacity, the second electric capacity, the 3rd electric capacity, first resistor, second resistance, 3rd resistor, diode, chip and the first inductance, positive voltage, which turns negative electricity die block, also includes the 4th electric capacity, operation amplifier and the second inductance, the utility model builds cuk converter using chip, reverser is built with common operation amplifier provide negative voltage feedback for the utility model again, and the first inductance and the second inductance are set respectively in input/output terminal, input and the pulsation of output circuit can be substantially reduced.The utility model is applied to test equipment or the technical field of big small-sized home electronics.
Description
Technical field
It the utility model is related to test equipment and the technical field of big small-sized home electronics, more particularly to a kind of positive electricity
Pressure turns negative electricity die block.
Background technology
Positive voltage turns negative voltage and all uses general BUCK on open market（BUCK:The basic DC/DC conversion of six kinds of Switching Power Supply
One of topology, Buck conversion circuit）Chip builds buck boost circuits to realize, as shown in figure 1, its is simple in construction easily
With, but often occur and be not easy to start, easily burn inductance, the problems such as Ripple Noise is big.General BUCK power supplys IC maximum pulse widths are all
It is 100%, when inductance value is bigger in circuit, it is too small to flow through inductive current, first pulse energy deficiency of starting up
In fully charged to electric capacity below, electric capacity fills the voltage less than the desired feedbacks of power supply IC, and power supply IC will export 100% pulsewidth,
This inductance is easy for saturation, saturation, can not produce self induction electromotive force to filter capacitor charging below, so anti-
It is multiple, the last oversize inductance value saturation of inductance ON time and burn.In order to increase startup energy, it is necessary to reduce inductance value, but
In the case of circuit underloading, BUCK BOOST（BUCK BOOST:One of basic DC/DC transformation topologies of six kinds of Switching Power Supply, back-pressure
Translation circuit）Circuit can be operated in discontinuous mode, produce ring, and the ripple that serious ring can directly affect out-put supply is made an uproar
Sound.So in the market BUCK power supplys IC（IC：That is integrated circuit, it is a kind of microelectronic device or part）The BUCK built
The stable starting up of BOOST negative voltages translation circuit and Ripple Noise is small to get both.
Utility model content
Technical problem to be solved in the utility model is overcome the deficiencies in the prior art, there is provided it is a kind of it is cheap simple,
Stability is high, easily start and positive voltage that noise ripple is small turns negative electricity die block.
Technical scheme is used by the utility model：The utility model include the first electrochemical capacitor, the second electrochemical capacitor,
First electric capacity, the second electric capacity, the 3rd electric capacity, first resistor, second resistance, 3rd resistor, diode, chip and the first inductance,
Positive voltage turns negative electricity die block also includes voltage input end including the 4th electric capacity, operation amplifier and the second inductance, the chip
Pin, compensating end pin, input voltage negative terminal pin, output voltage feedback end pin and end of convert pin, the operation amplification
Device includes output end, inverting input and in-phase input end；
Further, the voltage input end pin is connected with power supply and is connected with one end of first inductance,
The compensating end pin is connected with one end of the first resistor, the other end of the first resistor and second electric capacity
One end is connected, and the positive pole of one end of first electric capacity and first electrochemical capacitor is connected and is connected with the power supply
Connect, the end of convert pin is connected with one end of the 3rd electric capacity and is connected with the other end of first inductance, institute
The other end for stating the 3rd electric capacity is connected with one end of second inductance and is connected with the negative pole of the diode, and described
The other end of two inductance is connected with one end of the 3rd resistor and is connected with weak ground circuit ground terminal, the 4th electric capacity and
The negative pole of second electrochemical capacitor is connected and is connected with weak ground circuit ground terminal, the negative pole of first electrochemical capacitor, institute
The other end of the first electric capacity, the other end of second electric capacity and the input voltage negative terminal pin is stated to be connected with each other and connect successively
Ground, the positive pole of second electrochemical capacitor, the other end of the 4th electric capacity and diode anode are sequentially connected and are grounded, described
Output voltage feedback end pin is connected with the output end and is connected with one end of the second resistance, the anti-phase input
End connects with the other end of 3rd resistor and is connected with the other end of the second resistance, the in-phase input end ground connection.
Further, the chip is model LM2577 BOOST chips.
Further, first inductance is band magnetic core coil or ribbon core coil, and the value of first inductance is
1mH；Second inductance is band magnetic core coil or ribbon core coil, and the value of second inductance is 1mH.
Further, the value of first electrochemical capacitor and second electrochemical capacitor is 100UF.
Further, the model LM358 of the operation amplifier.
Further, the voltage of the power supply is 12V, and the voltage of the weak ground circuit ground terminal is -18V.
The beneficial effects of the utility model are：Because the utility model using general BOOST chips adds common operation
Amplifier builds cuk converter, and the CUK is one of basic DC/DC transformation topologies of six kinds of Switching Power Supply, i.e. back-pressure translation circuit,
And the utility model sets first inductance in the power input and sets the second inductance in the weak ground circuit ground terminal,
Input and the pulsation of output current can significantly be reduced, the defects of making up existing buck boost circuits, be particularly due to lead to
100% is no more than with power supply IC maximum pulse widths, so when to first inductance and alive second inductance,
First inductance and second inductance will not turn on into saturation state for a long time, first inductance in each cycle and
Second inductance can produce inductance induced electromotive force, can be voltage transformation electric capacity charging below；Even if inductance value is inclined
Greatly, start energy it is inadequate, but because each pulse will not saturation, energy, Ji Gekai can be provided for translation circuit below
Stable state can be more easily reached afterwards by closing the cycle；Because first inductance and second inductance can select it is bigger than normal, can
To allow circuit to be operated in continuous mode, because this, it is possible to reduce ringing, also just reduce Ripple Noise；This practicality is new
Type also adds the second resistance and the 3rd resistor to be built into simple reverser by the operation amplifier, thus solves
The problem of feedback voltage of the LM2577 chips can only sample positive voltage.
Brief description of the drawings
Fig. 1 is the circuit diagram that existing positive voltage turns negative voltage；
Fig. 2 is integrated circuit figure of the present utility model.
Embodiment
As shown in Fig. 2 in the present embodiment, the utility model includes the first electrochemical capacitor C1, the second electrochemical capacitor C2, the
One electric capacity C3, the second electric capacity C4, the 3rd electric capacity C5, first resistor R1, second resistance R2,3rd resistor R3, diode D, chip 1
With the first inductance L1, it is characterised in that：Positive voltage, which turns negative electricity die block, also includes the 4th electric capacity C6, operation amplifier 2 and second
Inductance L2, the chip 1 include voltage input end pin IN, compensating end pin COMP, input voltage negative terminal pin GND, output
Pressure feedback port pin FB and end of convert pin SW, the operation amplifier 2 include output end 21, inverting input 22 and same phase
Input 23；
The voltage input end pin IN is connected with power supply U1 and is connected with one end of the first inductance L1, described
Compensating end pin COMP is connected with one end of the first resistor R1, the other end of the first resistor R1 and the described second electricity
Hold C4 one end be connected, one end of the first electric capacity C3 and the first electrochemical capacitor C1 positive pole be connected and with it is described
Power supply U1 is connected, and the end of convert pin SW is connected with one end of the 3rd electric capacity C5 and with the first inductance L1's
The other end is connected, the other end of the 3rd electric capacity C5 be connected with one end of the second inductance L2 and with the diode
D negative pole is connected, the other end of the second inductance L2 be connected with one end of the 3rd resistor R3 and with weak ground circuit
Ground terminal U2 is connected, the 4th electric capacity C6 and the second electrochemical capacitor C2 negative pole be connected and with weak ground circuit ground terminal U2
It is connected, the negative pole of the first electrochemical capacitor C1, the other end of the first electric capacity C3, the other end of the second electric capacity C4
It is connected with each other and is grounded successively with the input voltage negative terminal pin GND, the positive pole of the second electrochemical capacitor C2, the described 4th
The electric capacity C6 other end and diode D anodes is sequentially connected and is grounded, the output voltage feedback end pin FB and the output
End 21 is connected and is connected with one end of the second resistance R2, the other end phase of the inverting input and 3rd resistor R3
Connect and be connected with the other end of the second resistance R2, the in-phase input end 23 is grounded.
In the present embodiment, the chip 1 is model LM2577 BOOST chips 1.
In the present embodiment, the first inductance L1 is with magnetic core coil or ribbon core coil, and the first inductance L1
Value be 1mH；The second inductance L2 is band magnetic core coil or ribbon core coil, and the value of the second inductance L2 is
1mH。
In the present embodiment, the first electrochemical capacitor C1 and the second electrochemical capacitor C2 value are 100UF.
In the present embodiment, the model LM358 of the operation amplifier 2.
In the present embodiment, the voltage of the power supply U1 is 12V, and the voltage of the weak ground circuit ground terminal U2 is -18V.
The utility model builds CUK electricity using the general BOOST chips 1 in market, model LM2577 chip 1
Road, then build reverser with common LM358 operation amplifiers 2 and provide negative voltage feedback for the utility model.
Because multiple power source IC maximum pulse widths are no more than 100%, so to the first inductance L1 and second electricity
Feel L2 it is alive when, the first inductance L1 and second inductance will not turn on into saturation state for a long time, each
The first inductance L1 in cycle and the second inductance L2 can produce inductance induced electromotive force, can be voltage change below
Change electric capacity charging；Even if inductance value is bigger than normal, it is inadequate to start energy, but because each pulse will not saturation, can be below
Translation circuit provides energy, and stable state can be more easily reached after several switch periods；Because the first inductance L1 and
The second inductance L2 can select bigger than normal, circuit can be allowed to be operated in continuous mode, because this, it is possible to reduce ringing,
Also Ripple Noise is just reduced；The utility model also passes through the operation amplifier 2 plus the second resistance R2 and the described 3rd
Resistance R3 is built into simple reverser, and the feedback voltage for thus solving the LM2577 chips can only sample asking for positive voltage
Topic.
The utility model is applied to test equipment or the technical field of big small-sized home electronics.
Although embodiment of the present utility model is described with practical solution, do not form the utility model is contained
The limitation of justice, for those skilled in the art, according to modification of this specification to its embodiment and the group with other schemes
Conjunction will be apparent from.
Claims (6)
1. a kind of positive voltage turns negative electricity die block, including the first electrochemical capacitor（C1）, the second electrochemical capacitor（C2）, the first electric capacity
（C3）, the second electric capacity（C4）, the 3rd electric capacity（C5）, first resistor（R1）, second resistance（R2）, 3rd resistor（R3）, diode
（D）, chip（1）With the first inductance（L1）, it is characterised in that：Positive voltage, which turns negative electricity die block, also includes the 4th electric capacity（C6）, fortune
Row amplifier（2）With the second inductance（L2）, the chip（1）Including voltage input end pin（IN）, compensating end pin（COMP）、
Input voltage negative terminal pin（GND）, output voltage feedback end pin（FB）With end of convert pin（SW）, the operation amplifier
（2）Including output end（21）, inverting input（22）And in-phase input end（23）；
The voltage input end pin（IN）With power supply（U1）Be connected and with first inductance（L1）One end be connected, institute
State compensating end pin（COMP）With the first resistor（R1）One end be connected, the first resistor（R1）The other end and institute
State the second electric capacity（C4）One end be connected, first electric capacity（C3）One end and first electrochemical capacitor（C1）Positive pole
Be connected and with the power supply（U1）It is connected, the end of convert pin（SW）With the 3rd electric capacity（C5）One end be connected
And with first inductance（L1）The other end be connected, the 3rd electric capacity（C5）The other end and second inductance（L2）
One end be connected and with the diode（D）Negative pole be connected, second inductance（L2）The other end and the described 3rd
Resistance（R3）One end be connected and with weak ground circuit ground terminal（U2）It is connected, the 4th electric capacity（C6）With the described second electrolysis
Electric capacity（C2）Negative pole be connected and with weak ground circuit ground terminal（U2）It is connected, first electrochemical capacitor（C1）Negative pole, institute
State the first electric capacity（C3）The other end, second electric capacity（C4）The other end and the input voltage negative terminal pin（GND）According to
Secondary interconnection is simultaneously grounded, second electrochemical capacitor（C2）Positive pole, the 4th electric capacity（C6）The other end and diode
（D）Anode is sequentially connected and is grounded, the output voltage feedback end pin（FB）With the output end（21）Be connected and with institute
State second resistance（R2）One end be connected, the inverting input and 3rd resistor（R3）The other end connect and with described
Two resistance（R2）The other end be connected, the in-phase input end（23）Ground connection.
2. positive voltage according to claim 1 turns negative electricity die block, it is characterised in that：The chip（1）For model
LM2577 BOOST chips（1）.
3. positive voltage according to claim 1 turns negative electricity die block, it is characterised in that：First inductance（L1）For band magnetic
Core coil or ribbon core coil, and first inductance（L1）Value be 1mH；Second inductance（L2）For band magnetic core coil
Or ribbon core coil, and second inductance（L2）Value be 1mH.
4. positive voltage according to claim 1 turns negative electricity die block, it is characterised in that：First electrochemical capacitor（C1）With
Second electrochemical capacitor（C2）Value be 100UF.
5. positive voltage according to claim 1 turns negative electricity die block, it is characterised in that：The operation amplifier（2）Type
Number it is LM358.
6. positive voltage according to claim 1 turns negative electricity die block, it is characterised in that：The power supply（U1）Voltage be
12V, the weak ground circuit ground terminal（U2）Voltage be -18V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720803477.2U CN207069900U (en) | 2017-07-05 | 2017-07-05 | Positive voltage turns negative electricity die block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720803477.2U CN207069900U (en) | 2017-07-05 | 2017-07-05 | Positive voltage turns negative electricity die block |
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| Publication Number | Publication Date |
|---|---|
| CN207069900U true CN207069900U (en) | 2018-03-02 |
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ID=61507845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720803477.2U Active CN207069900U (en) | 2017-07-05 | 2017-07-05 | Positive voltage turns negative electricity die block |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054679A (en) * | 2020-09-11 | 2020-12-08 | 国网智能科技股份有限公司 | Positive and negative voltage conversion direct-current power supply and control method thereof |
| CN112701906A (en) * | 2020-12-11 | 2021-04-23 | Tcl华星光电技术有限公司 | Direct current voltage transformation circuit |
-
2017
- 2017-07-05 CN CN201720803477.2U patent/CN207069900U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054679A (en) * | 2020-09-11 | 2020-12-08 | 国网智能科技股份有限公司 | Positive and negative voltage conversion direct-current power supply and control method thereof |
| CN112054679B (en) * | 2020-09-11 | 2021-09-17 | 山东鲁软数字科技有限公司智慧能源分公司 | Positive and negative voltage conversion direct-current power supply and control method thereof |
| CN112701906A (en) * | 2020-12-11 | 2021-04-23 | Tcl华星光电技术有限公司 | Direct current voltage transformation circuit |
| WO2022121023A1 (en) * | 2020-12-11 | 2022-06-16 | Tcl华星光电技术有限公司 | Direct current transformer circuit |
| US11996775B2 (en) | 2020-12-11 | 2024-05-28 | Tcl China Star Optoelectronics Technology Co., Ltd. | DC transformer circuit |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 518131 Guangdong Province, Shenzhen city Longhua District Guanlan View Road Hunan Dafu community tiger Pai Village No. 118 Building 1, 9 Fairview Science Park 2 Patentee after: Shenzhen branch automation equipment Co., Ltd. Address before: 518131 Guangdong Province, Zhuhai city Longhua District Guanlan View Road Hunan Dafu community tiger Pai Village No. 118 Building 1, 9 Fairview science circle 2 Patentee before: Shenzhen branch automation equipment Co., Ltd. |
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| CP02 | Change in the address of a patent holder |