CN204967614U - Switching power supply is transferred in counting of high accuracy wide region - Google Patents
Switching power supply is transferred in counting of high accuracy wide region Download PDFInfo
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- CN204967614U CN204967614U CN201520758894.0U CN201520758894U CN204967614U CN 204967614 U CN204967614 U CN 204967614U CN 201520758894 U CN201520758894 U CN 201520758894U CN 204967614 U CN204967614 U CN 204967614U
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Abstract
The utility model discloses a switching power supply is transferred in counting of high accuracy wide region, including chip U1, resistance R2 and diode D1, the CPU bus is all connected to chip U1's pin 4-13, chip U1's 3 ground connection of pin, and chip U1's pin 1 connecting resistance R2, resistance R2's other end connecting resistance R1 and chip U2's pin 3, resistance R1's the other end VDD that connects, inductance L1 and power VIN are connected to chip U2's pin 2. This practical switching power supply is transferred in counting of high accuracy wide region has saved the serious high -power linear voltage regulator that generates heat, has promoted power efficiency by a wide margin, has saved external power adapter, not only brings the convenience for the user uses, and the cost is reduced has improved the benefit moreover.
Description
Technical field
The utility model relates to a kind of Switching Power Supply, specifically a kind of several tune switch power supplys of high precision wide range.
Background technology
At present, universal programmer drives entirely in other companies, for producing the VDD required for dissimilar chip, VPP or VXX voltage, extensive employing 34063 booster circuit, DC12V is boosted to about DC25V, then to be programmed DAC chip by CPU, control the mode of high-power linear voltage regulator step-down to produce accurate direct voltage, same product will use three groups of such circuit, not only with high costs, and because employ high-power linear voltage regulator, cause power-efficient extremely low (10%-40%), heating is serious, Overall Power Consumption is large, need to use heavy 12V external power adapter.
Utility model content
The purpose of this utility model is the several tune switch power supplys providing a kind of high precision wide range, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of several tune switch power supplys of high precision wide range, comprise chip U1, resistance R2 and diode D1, the pin 4 ~ 13 of described chip U1 all connects cpu bus, pin 3 ground connection of chip U1, the pin 1 contact resistance R2 of chip U1, the other end contact resistance R1 of resistance R2 and the pin 3 of chip U2, the other end of resistance R1 connects power vd D, the pin 2 of chip U2 connects inductance L 1 and power supply VIN, the other end of inductance L 1 connects electric capacity C1, the pin 5 of chip U2 and the pin 6 of chip U2, the other end of electric capacity C1 connects anode and the inductance L 2 of diode D1, the other end ground connection of inductance L 2, the other end of diode D1 connects electric capacity C2, electric capacity C3 and power vd D, the model of chip U1 is TLC7226, and the model of chip U2 is XL6007.
Compared with prior art, the beneficial effects of the utility model are: several tune switch power supplys of this Practical Precision wide region eliminate the serious high-power linear voltage regulator of heating, significantly improve power-efficient, eliminate external power supply adaptor, be not only user's use to bring convenience, and reduce cost, improve benefit.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of several tune switch power supplys of high precision wide range.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, a kind of several tune switch power supplys of high precision wide range, comprise chip U1, resistance R2 and diode D1, the pin 4 ~ 13 of described chip U1 all connects cpu bus, pin 3 ground connection of chip U1, the pin 1 contact resistance R2 of chip U1, the other end contact resistance R1 of resistance R2 and the pin 3 of chip U2, the other end of resistance R1 connects power vd D, the pin 2 of chip U2 connects inductance L 1 and power supply VIN, the other end of inductance L 1 connects electric capacity C1, the pin 5 of chip U2 and the pin 6 of chip U2, the other end of electric capacity C1 connects anode and the inductance L 2 of diode D1, the other end ground connection of inductance L 2, the other end of diode D1 connects electric capacity C2, electric capacity C3 and power vd D, the model of chip U1 is TLC7226, and the model of chip U2 is XL6007.
Operation principle of the present utility model is: chip U2, L1, L2, D1, C3, C2 in circuit form one group of SPEIC circuit, VDD/VPP or VXX produced needed for programmable device powers.The feature of this circuit is, output voltage can be greater than, be equal to or less than input voltage, and such as during VIN=5V, VDD can be 3.3V, 5V or 12V.Concrete magnitude of voltage is drawn by following formula:
VDD＝(1.25-VDAC)*(R1/R2)+1.25；
Here 1.25V is the built-in reference voltage numerical value of U2.This formula does not affect by DC-DC circuit topological structure about the calculating of output voltage.DC-DC topological structure, according to embody rule, can select the topological structures such as BUCK, BOOST, SPEIC.Be used herein that can boost also can the SPEIC topological structure of step-down.
VDAC is the analog voltage that DAC chip exports, and scope is from 0 to 1.25V, and precision can accomplish the step value of 0.005V, and VDAC is lower, and vdd voltage is higher.And VDAC magnitude of voltage is controlled by cpu bus, so this circuit can be controlled by software completely, precision is high, haves a wide reach.Such as R1 value 10K, R2 value 1K, VDD excursion is 1.25V to 13.75V, step value 0.05V.
Claims (1)
1. several tune switch power supplys of a high precision wide range, comprise chip U1, resistance R2 and diode D1, it is characterized in that, the pin 4 ~ 13 of described chip U1 all connects cpu bus, pin 3 ground connection of chip U1, the pin 1 contact resistance R2 of chip U1, the other end contact resistance R1 of resistance R2 and the pin 3 of chip U2, the other end of resistance R1 connects power vd D, the pin 2 of chip U2 connects inductance L 1 and power supply VIN, the other end of inductance L 1 connects electric capacity C1, the pin 5 of chip U2 and the pin 6 of chip U2, the other end of electric capacity C1 connects anode and the inductance L 2 of diode D1, the other end ground connection of inductance L 2, the other end of diode D1 connects electric capacity C2, electric capacity C3 and power vd D, the model of chip U1 is TLC7226, and the model of chip U2 is XL6007.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520758894.0U CN204967614U (en) | 2015-09-28 | 2015-09-28 | Switching power supply is transferred in counting of high accuracy wide region |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520758894.0U CN204967614U (en) | 2015-09-28 | 2015-09-28 | Switching power supply is transferred in counting of high accuracy wide region |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204967614U true CN204967614U (en) | 2016-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520758894.0U Active CN204967614U (en) | 2015-09-28 | 2015-09-28 | Switching power supply is transferred in counting of high accuracy wide region |
Country Status (1)
| Country | Link |
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| CN (1) | CN204967614U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787709A (en) * | 2016-12-20 | 2017-05-31 | 施耐德万高（天津）电气设备有限公司 | Wide input range power circuit |
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2015
- 2015-09-28 CN CN201520758894.0U patent/CN204967614U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787709A (en) * | 2016-12-20 | 2017-05-31 | 施耐德万高（天津）电气设备有限公司 | Wide input range power circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |