CN208999857U

CN208999857U - A kind of microminiature power circuit

Info

Publication number: CN208999857U
Application number: CN201821879900.8U
Authority: CN
Inventors: 王邠; 邓建芳
Original assignee: Nanjing Institute of Railway Technology
Current assignee: Nanjing Institute of Railway Technology
Priority date: 2018-11-15
Filing date: 2018-11-15
Publication date: 2019-06-18
Anticipated expiration: 2028-11-15

Abstract

The utility model discloses a kind of microminiature power circuits, include boost chip U1, 2 feet of U1 connect the one end resistance R1, the one end resistance R2 and output voltage, 3 feet of U1 connect the one end inductance L1, the 5 foot input power Vin of U1 and with the resistance R1 other end, the one end capacitor C2 is connected with the inductance L1 other end, the 10 feet connection resistance R2 other end of U1 and the one end resistance R3, resistance R3 other end ground connection, 1 foot of U1 connects the one end capacitor C1, capacitor C1 other end ground connection, the 4 of U1, 9 feet ground connection, the 6 of U1, 7, 8 feet are all connected with power supply Vin, 2 feet of U1 are connected with filter circuit.The utility model structure is simple, and cost is relatively low, and can drive under very low voltage and complete voltage conversion, to solve the powerup issue of micro power.

Description

A kind of microminiature power circuit

Technical field

The utility model relates to a kind of power circuit, especially a kind of microminiature power circuit.

Background technique

Solar battery is also known as " solar chip " or " photocell ", is a kind of photoelectricity using the sunlight direct generation of electricity Wafer.As long as the illumination that it is satisfied certain illumination conditions is arrived, moment output voltage and can have the case where circuit Lower generation electric current.Physically it is being known as photovoltaic (Photovoltaic is abbreviated as PV), abbreviation photovoltaic.Solar-electricity Pond is the device for directly luminous energy being converted to by photoelectric effect or photochemical effect electric energy.The crystal silicon to be worked with photoelectric effect Solar battery is mainstream, and implements solar battery then also in the budding stage with the hull cell of photochemical effect work.

Micro fuel cell is the power supply that a kind of electronic equipment uses, and chemical energy is converted into electric energy by it.Fuel cell is logical The inflammable fuel of peroxidating such as hydrogen or alcohol operates.These energy are largely used for motor vehicles.These most of equipment Use hydrogen.Recently, the fuel cell of diminution is developed for digital camera, portable receiver and laptop these equipment It uses.

Both the above battery is increasingly paid attention to by people with the burning hot of new energy, however due to the particularity of the two, It needs practice in life, and the voltage very little of power supply brought by small volume is difficult directly to be utilized, need It brings the voltage up so as to drive other equipment, and current booster circuit itself is difficult to drive.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of microminiature power circuits, realize the liter of minicell Pressure driving.

In order to solve the above technical problems, the technical scheme adopted by the utility model is:

A kind of microminiature power circuit, it is characterised in that: include boost chip U1,2 feet of U1 connect the one end resistance R1, electricity Hinder the one end R2 and output voltage, 3 feet of U1 connect the one end inductance L1, the 5 foot input power Vin of U1 and another with resistance R1 End, the one end capacitor C2 are connected with the inductance L1 other end, and the 10 feet connection resistance R2 other end and the one end resistance R3, resistance R3 of U1 is another One end ground connection.

Further, the boost chip U3005 uses TPS61200 voltage boost converter chip.

Further, 1 foot of the U1 connects the one end capacitor C1, capacitor C1 other end ground connection.

Further, 4, the 9 feet ground connection of the U1.

Further, 6,7,8 feet of the U1 are all connected with power supply Vin.

Further, 2 feet of the U1 are connected with filter circuit.

Further, the filter circuit includes capacitor C3, capacitor C4 and variable resistance RT1, and the 2 of the one end capacitor C3 and U1 Foot is connected with the one end variable resistance RT1, and the variable resistance RT1 other end connect with the one end capacitor C4 and exports 5V voltage, capacitor The C3 other end and capacitor C4 other end ground connection.

The utility model compared with prior art, has the following advantages that and effect: the microminiature power supply electricity of the utility model Line structure is simple, and cost is relatively low, and can drive under very low voltage and complete voltage conversion, to solve micro power Powerup issue.

Detailed description of the invention

Fig. 1 is a kind of circuit diagram of microminiature power circuit of the utility model.

Specific embodiment

Below by embodiment, the utility model is described in further detail, and following embodiment is to the utility model Explanation and the utility model is not limited to following embodiment.

As shown in Figure 1, a kind of microminiature power circuit of the utility model, includes boost chip U1,2 feet of U1 connect electricity Hinder the one end R1, the one end resistance R2 and output voltage, 3 feet of U1 connect the one end inductance L1, the 5 foot input power Vin of U1 and with The resistance R1 other end, the one end capacitor C2 are connected with the inductance L1 other end, the 10 feet connection resistance R2 other end and resistance R3 mono- of U1 End, resistance R3 other end ground connection.

Boost chip U3005 uses TPS61200 voltage boost converter chip.TPS61200 is the minimum input electricity of industry The DC/DC boost converter of pressure, microminiature power circuit can under the input voltage less than 0.3V efficient operation, starting electricity Pressure is also only 0.5V, it is possible to provide greater than the electric current of 600m A.

1 foot of U1 connects the one end capacitor C1, capacitor C1 other end ground connection.4,9 feet of U1 are grounded.6,7,8 feet of U1 connect Meet power supply Vin.2 feet of U1 are connected with filter circuit.Filter circuit includes capacitor C3, capacitor C4 and variable resistance RT1, capacitor C3 2 feet and the one end variable resistance RT1 of one end and U1 connect, and the variable resistance RT1 other end connect and exports with the one end capacitor C4 5V voltage, the capacitor C3 other end and capacitor C4 other end ground connection.

The working principle of the utility model are as follows: voltage conversion the cutting by inductance L1 and chip interior mos pipe of circuit Change, by inductance because the voltage value that Lenz's law incudes is added the voltage after getting a promotion with supply voltage, sampling resistor R2 with R3 and internal reference source of stable pressure etc. form closed loop voltage control, can stablize voltage value in controlled range.Output Voltage Formula Are as follows: Vout=((R2+R3) * Vfb)/R3

Wherein Vfb is the fixed reference potential of device inside, representative value 500mv.Suitable electricity is selected through overtesting Resistance makes the voltage of output reach 5.01v.

The microminiature circuit construction of electric power of the utility model is simple, and cost is relatively low, and can drive under very low voltage It is dynamic to complete voltage conversion, to solve the powerup issue of micro power.

Above content is only illustrate to examples for clearly illustrating the present invention described in this specification.The utility model Person of ordinary skill in the field can do various modifications or supplement to described specific embodiment or use similar side Formula substitution, content without departing from the utility model specification or beyond the scope defined by this claim should all Belong to the protection scope of the utility model.

Claims

1. a kind of microminiature power circuit, it is characterised in that: include boost chip U1,2 feet of U1 connect the one end resistance R1, resistance The one end R2 and output voltage, 3 feet of U1 connect the one end inductance L1, the 5 foot input power Vin of U1 and with the resistance R1 other end, The one end capacitor C2 is connected with the inductance L1 other end, and the 10 feet connection resistance R2 other end and the one end resistance R3, resistance R3 of U1 is another End ground connection.

2. a kind of microminiature power circuit described in accordance with the claim 1, it is characterised in that: the boost chip U3005 is used TPS61200 voltage boost converter chip.

3. a kind of microminiature power circuit described in accordance with the claim 1, it is characterised in that: 1 foot of the U1 connects capacitor C1 One end, capacitor C1 other end ground connection.

4. a kind of microminiature power circuit described in accordance with the claim 1, it is characterised in that: 4,9 feet of the U1 are grounded.

5. a kind of microminiature power circuit described in accordance with the claim 1, it is characterised in that: 6,7,8 feet of the U1 are all connected with Power supply Vin.

6. a kind of microminiature power circuit described in accordance with the claim 1, it is characterised in that: 2 feet of the U1 are connected with filtering Circuit.

7. a kind of microminiature power circuit according to claim 6, it is characterised in that: the filter circuit includes capacitor 2 feet of C3, capacitor C4 and variable resistance RT1, the one end capacitor C3 and U1 and the connection of the one end variable resistance RT1, variable resistance RT1 are another One end connect with the one end capacitor C4 and exports 5V voltage, the capacitor C3 other end and capacitor C4 other end ground connection.