CN203984239U - MCU power IC - Google Patents
MCU power IC Download PDFInfo
- Publication number
- CN203984239U CN203984239U CN201420371978.4U CN201420371978U CN203984239U CN 203984239 U CN203984239 U CN 203984239U CN 201420371978 U CN201420371978 U CN 201420371978U CN 203984239 U CN203984239 U CN 203984239U
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- pin
- electric capacity
- resistance
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- integrated chip
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Abstract
The utility model discloses a kind of MCU power IC.It comprises integrated chip and three-terminal voltage-stabilizing chip, 1 pin of integrated chip connects the second electric capacity to earth terminal, 3 pin of integrated chip and 5 pin ground connection, 4 pin of integrated chip connect respectively first resistance one end and second resistance one end, the second resistance other end connects respectively first electric capacity one end and inductance one end, 2 pin of another termination integrated chip of inductance, diode cathode, the first electric capacity other end, the first resistance other end, the 3rd electric capacity one end, 2 pin of three-terminal voltage-stabilizing chip, the 4th equal ground connection in electric capacity one end, 3 pin of three-terminal voltage-stabilizing chip, another termination+5V power end of the 4th electric capacity, 1 pin of three-terminal voltage-stabilizing chip connects the other end of the 3rd electric capacity other end and the first electric capacity.The utility model can improve the operating efficiency of stabilized voltage power supply, reduces energy loss, reduces the pyrolytic damage to MCU, and can reduce the interference of external communication voltage fluctuation to MCU, can reduce the High-frequency Interference of scurrying into through power supply simultaneously.
Description
Technical field
The utility model relates to a kind of circuit, be specifically related to a kind of MCU power IC.
Background technology
The MCU of embedded control system generally needs a stable operating voltage ability reliably working.And designer is accustomed to adopting linear voltage stabilization device (as 78xx series Three-end voltage stabilizer) to change higher direct voltage into MCU required operating voltage as voltage-regulation and voltage-stabilizing device more.The linearity of this linear stabilized power supply is adjusted working method can cause larger " thermal loss " (its value is V pressure drop × I load) at work, and its operating efficiency is only 30%～50%.In addition be operated under the adverse circumstances such as high dust and often embedded industry controlling system be placed in to airtight container to ensure local cleaning.Like this, with not only inefficiency of linear power supply, and the gathering of heat in closed container that " thermal loss " produces also aggravated the bad working environments of MCU, thereby make the stability of embedded control system become poorer.
Summary of the invention
For the deficiency existing in prior art, the utility model object is to be to provide a kind of MCU power IC, can improve the operating efficiency of stabilized voltage power supply, reduce energy loss, reduce the pyrolytic damage to MCU, and can reduce the interference of external communication voltage fluctuation to MCU, can reduce the High-frequency Interference of scurrying into through power supply simultaneously.
To achieve these goals, the utility model is to realize by the following technical solutions: MCU power IC, comprise integrated chip and three-terminal voltage-stabilizing chip, 1 pin of integrated chip connects the second electric capacity to earth terminal, 3 pin of integrated chip and 5 pin ground connection, 4 pin of integrated chip connect respectively first resistance one end and second resistance one end, the second resistance other end connects respectively first electric capacity one end and inductance one end, 2 pin of another termination integrated chip of inductance, diode cathode, the first electric capacity other end, the first resistance other end, the 3rd electric capacity one end, 2 pin of three-terminal voltage-stabilizing chip, the 4th equal ground connection in electric capacity one end, 3 pin of three-terminal voltage-stabilizing chip, another termination+5V power end of the 4th electric capacity, 1 pin of three-terminal voltage-stabilizing chip connects the other end of the 3rd electric capacity other end and the first electric capacity.
As preferably, described integrated chip adopts chip LM2576.
As preferably, the model of described three-terminal voltage-stabilizing chip is 7805.
The beneficial effects of the utility model: can improve the operating efficiency of stabilized voltage power supply, reduce energy loss, reduce the pyrolytic damage to MCU, and can reduce the interference of external communication voltage fluctuation to MCU, can reduce the High-frequency Interference of scurrying into through power supply simultaneously.
Brief description of the drawings
Describe the utility model in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is circuit diagram of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with embodiment, further set forth the utility model.
With reference to Fig. 1, this embodiment is by the following technical solutions: MCU power IC, comprise integrated chip IC1 and three-terminal voltage-stabilizing chip IC 2, 1 pin of integrated chip IC1 connects the second capacitor C 2 to earth terminal, 3 pin of integrated chip IC1 and 5 pin ground connection, 4 pin of integrated chip IC1 connect respectively first resistance R 1 one end and second resistance R 2 one end, second resistance R 2 other ends connect respectively first capacitor C 1 one end and inductance L 1 one end, 2 pin of inductance L 1 another termination integrated chip IC1, diode D1 positive pole, first capacitor C 1 other end, first resistance R 1 other end, the 3rd capacitor C 3 one end, 2 pin of three-terminal voltage-stabilizing chip IC 2, the 4th capacitor C 4 equal ground connection in one end, 3 pin of three-terminal voltage-stabilizing chip IC 2, the 4th capacitor C 4 another termination+5V power ends, 1 pin of three-terminal voltage-stabilizing chip IC 2 connects the other end of the 3rd capacitor C 3 other ends and the first capacitor C 1.
It should be noted that described integrated chip IC1 adopts chip LM2576.
In addition, the model of described three-terminal voltage-stabilizing chip IC 2 is 7805.
This embodiment is in order to improve the whole work efficiency of stabilized voltage power supply, in the time that three-terminal voltage-stabilizing chip IC 2 adopts 7805, because 7805 minimum input voltage is 7.5V, therefore, switch voltage-stabilizing integrated circuit in Fig. 1 has adopted adjustable pio chip (LM2576-ADJ), in figure, the relation of the output voltage V out of switch voltage-stabilizing integrated circuit and the first resistance R 1 and the second resistance R 2 is as follows:
Vout=1.23 × (1+ the second resistance R 2/ first resistance R 1)
In formula, the span of the first resistance R 1 is 1～5k Ω.When Vout gets 7.5V, the first resistance R 1 and gets 1k Ω, the second resistance R 2 is approximately 5k Ω.
This embodiment can improve the operating efficiency of stabilized voltage power supply, reduces energy loss, reduces the pyrolytic damage to MCU, and can reduce the interference of external communication voltage fluctuation to MCU, can reduce the High-frequency Interference of scurrying into through power supply simultaneously.
More than show and described general principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1.MCU power IC, it is characterized in that, comprise integrated chip (IC1) and three-terminal voltage-stabilizing chip (IC2), 1 pin of integrated chip (IC1) connects the second electric capacity (C2) to earth terminal, 3 pin of integrated chip (IC1) and 5 pin ground connection, 4 pin of integrated chip (IC1) connect respectively the first resistance (R1) one end and the second resistance (R) one end, the second resistance (R2) other end connects respectively the first electric capacity (C1) one end and inductance (L1) one end, 2 pin of another termination integrated chip (IC1) of inductance (L1), diode (D1) positive pole, the first electric capacity (C1) other end, the first resistance (R1) other end, the 3rd electric capacity (C3) one end, 2 pin of three-terminal voltage-stabilizing chip (IC2), the 4th equal ground connection in electric capacity (C4) one end, 3 pin of three-terminal voltage-stabilizing chip (IC2), another termination+5V power end of the 4th electric capacity (C4), 1 pin of three-terminal voltage-stabilizing chip (IC2) connects the other end of the 3rd electric capacity (C3) other end and the first electric capacity (C1).
2. MCU power IC according to claim 1, is characterized in that, described integrated chip (IC1) adopts chip LM2576.
3. MCU power IC according to claim 1, is characterized in that, the model of described three-terminal voltage-stabilizing chip (IC2) is 7805.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420371978.4U CN203984239U (en) | 2014-07-08 | 2014-07-08 | MCU power IC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420371978.4U CN203984239U (en) | 2014-07-08 | 2014-07-08 | MCU power IC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203984239U true CN203984239U (en) | 2014-12-03 |
Family
ID=51981654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420371978.4U Expired - Fee Related CN203984239U (en) | 2014-07-08 | 2014-07-08 | MCU power IC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203984239U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682530A (en) * | 2015-03-05 | 2015-06-03 | 南宁市鼎天机械制造有限公司 | Vehicle-mounted energy storage device for electric agricultural vehicle |
-
2014
- 2014-07-08 CN CN201420371978.4U patent/CN203984239U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682530A (en) * | 2015-03-05 | 2015-06-03 | 南宁市鼎天机械制造有限公司 | Vehicle-mounted energy storage device for electric agricultural vehicle |
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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: 20141203 Termination date: 20160708 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |