CN214707540U

CN214707540U - Power supply device for direct current electronic equipment

Info

Publication number: CN214707540U
Application number: CN202120800649.7U
Authority: CN
Inventors: 谭江华
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-11-12
Anticipated expiration: 2031-04-19

Abstract

The utility model discloses a direct current electronic equipment power supply unit, including electric wire netting input circuit, electric wire netting noise filter circuit, rectification filter circuit, vary voltage circuit, control circuit, sampling circuit, multichannel direct current output circuit, electric wire netting noise filter circuit is used for filtering electromagnetic interference, and rectification filter circuit is used for exporting smooth direct current, and vary voltage circuit is used for changing output coil's magnitude of voltage, and control circuit is used for starting circuit and adjusts output voltage, and sampling circuit is used for detecting the magnitude of current of output, and multichannel direct current output circuit is used for exporting adjustable direct current voltage. The utility model discloses direct current electronic equipment power supply unit adopts off-line on-off control direct current voltage's output, need not use the big electric capacity of input, has improved the efficiency of the energy, and the interference killing feature is strong, and components and parts are few, and are small, and are with low costs, and output can be adjusted as required, safe and reliable.

Description

Power supply device for direct current electronic equipment

Technical Field

The utility model relates to a direct current power supply field specifically is a direct current electronic equipment power supply unit.

Background

With the continuous development of modern science and technology and the continuous progress of testing technology, the accuracy of test equipment is constantly improved, many direct current electronic equipment need provide the direct current output voltage of multiple voltage signal, and require that the power signal is accurate, stable, controllable, and the interference killing feature is strong, for the permanent stable work of better messenger direct current electronic equipment, the direct current electric energy quality that needs provide also receives each country's power worker's high importance, but direct current supply equipment on the market still adopts input large capacitance at present, the reliability is not high, area is big, some then adopt devices such as opto-coupler, the components and parts is in large quantity, and is with high costs, and too single to the output of direct current output voltage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a direct current electronic equipment power supply unit to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a direct current electronic equipment power supply unit, includes electric wire netting input circuit, electric wire netting noise filter circuit, rectification filter circuit, vary voltage circuit, control circuit, sampling circuit, multichannel direct current output circuit, electric wire netting noise filter circuit is used for filtering electromagnetic interference, and rectification filter circuit is used for exporting smooth direct current, and vary voltage circuit is used for changing the voltage value of output coil, and control circuit is used for starting circuit and regulation output voltage, and sampling circuit is used for detecting the electric current size of output, and multichannel direct current output circuit is used for exporting adjustable direct current voltage.

As a further technical solution of the present invention: the output end of the power grid input circuit outputs 220V voltage to be input into the input end of the power grid noise filter circuit, the output end of the power grid noise filter circuit is connected with the input end of the rectification filter circuit, the output end of the rectification filter circuit is connected with the input end of the voltage transformation circuit, the output end of one secondary winding of the voltage transformation circuit is connected with the input end of the multi-path direct current output circuit, the output end of the other secondary winding of the voltage transformation circuit is connected with the output end of the control circuit, the input end of the multi-path direct current output circuit is connected with the input end of the sampling feedback circuit, and the output end of the sampling inversion circuit is connected with the input end of the control circuit.

As a further technical solution of the present invention: the power grid input circuit comprises 220V mains voltage, an L end of the 220V mains voltage is connected with a 3 end of a capacitor C1 and a 3 end of a common-mode inductor LF through a fuse FU, an N end of the 220V mains voltage is connected with the other end of a capacitor C1 and a 1 end of the common-mode inductor LF, a 4 end of the common-mode inductor LF is connected with a 1 end of a capacitor C2, a capacitor C3 and a 1 end of a rectifier T, a 2 end of the common-mode inductor LF is connected with the other end of a capacitor C2, a capacitor C4 and a 3 end of the rectifier T, a port 2 of the rectifier T is connected with the other end of a capacitor C3, the other end of a capacitor C4 and a ground end, a port 4 of the rectifier T is connected with an anode of a capacitor C5, a capacitor C6, a resistor R1, a capacitor C8 and a synonym end of a primary winding of a transformer W, an anode of a diode D2 is connected with a synonym end of a cathode of a diode D2 and a cathode 1 of an IC chip of a power management chip, a pin FR of a power management chip IC1 is connected with a resistor R6 and a resistor R7, a pin BP of the power management chip IC1 is connected with a cathode of a capacitor C5, a pin S of the power management chip IC1, a resistor R7, an anode of a diode D7 and a capacitor C16 through a capacitor C7, a dotted terminal of a secondary winding W1 of a transformer W is connected with the other terminal of a capacitor C16 and the other terminal of a resistor R6, a dotted terminal of a secondary winding W6 of the transformer W is connected with a cathode of a diode D6, an anode of the capacitor C6 and a port 2 of a regulator IC 6, a dotted terminal of the secondary winding W6 of the transformer W is connected with the dotted terminal of the secondary winding W6 of the transformer W, the other terminal of the capacitor C6, an anode of the diode D6, a cathode of the diode D6, an anode of the capacitor C6, a slider RP 72 and a slider potential of the slider 6, Potentiometer RP2, a slider terminal of potentiometer RP2, a capacitor C2, a cathode of light emitting diode LED 2, a cathode of capacitor C2, a capacitor C2 and a ground terminal, port 1 of regulator IC2 is connected to the other terminal of potentiometer RP2, a resistor R2, an anode of diode D2 and the other terminal of capacitor C2, port 3 of regulator IC2 is connected to the other terminal of resistor R2, a cathode of diode D2, an anode of capacitor C2, the other terminal of capacitor C2 and dc output voltage + U2, a cathode of diode D2 is connected to resistor R2 and dc output voltage + U2-1, the other terminal of resistor R2 is connected to the anode of light emitting diode LED 2, a secondary winding W2 of transformer W is connected to the anode of diode D2, the cathode of capacitor C2 and the cathode of capacitor C2, the other terminal of resistor R2 is connected to the other terminal of regulator RP2 and the other terminal of regulator R2 of regulator IC2, the other end of the resistor R5, the negative electrode of the capacitor C14, the capacitor C15 and the DC output voltage-U3 are connected to port 3 of the voltage regulator IC 3.

As a further technical solution of the present invention: the common mode inductor LF and the capacitors C1-C4 form a power grid noise filter circuit, the rectifier T and the capacitor C5 form a rectification filter circuit, the transformer W forms a voltage transformation circuit, the capacitors C6-C7, the resistor R1, the diodes D1-D2 and the power management chip IC1 form a control circuit, the resistors R6-R7, the diode D7 and the capacitor C16 form a sampling circuit, and the voltage stabilizer IC2-IC3, the diodes D3-D8, the capacitors C9-C15 and the potentiometers RP1-RP2 form a multi-path direct current output circuit.

As a further technical solution of the present invention: the power management chip IC1 is an LNK564 power management chip.

As a further technical solution of the present invention: the voltage stabilizer IC2-IC3 selects an LM371 three-terminal integrated voltage stabilizer.

As a further technical solution of the present invention: the transformer W is an EE16 transformer.

As a further technical solution of the present invention: the diodes D1-D13 are 1N4001 diodes.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses direct current electronic equipment power supply unit adopts off-line on-off control direct current voltage's output, need not use the big electric capacity of input, has improved the efficiency of the energy, and the interference killing feature is strong, and components and parts are few, and are small, and are with low costs, and output can be adjusted as required, safe and reliable.

Drawings

Fig. 1 is a schematic block diagram of the principle of the present invention.

Fig. 2 is a circuit diagram of the power supply device for dc electronic equipment according to the present invention.

Fig. 3 is a functional pin diagram of the LNK564 power management chip.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: referring to fig. 1, a power supply device for dc electronic equipment, a power grid input circuit, a power grid noise filter circuit, a rectifying filter circuit, a transformer circuit, a control circuit, a sampling circuit, and a multi-path dc output circuit, wherein the power grid noise filter circuit is used for filtering electromagnetic interference, the rectifying filter circuit is used for outputting smooth dc power, the transformer circuit is used for changing the voltage value of the output coil, the control circuit is used for starting the circuit and adjusting the output voltage, the sampling circuit is used for detecting the magnitude of the output current, the multi-path dc output circuit is used for outputting adjustable dc voltage, 220V voltage is output from the output terminal of the power grid input circuit and is input to the input terminal of the power grid noise filter circuit, the output terminal of the power grid noise filter circuit is connected to the input terminal of the rectifying filter circuit, the output terminal of the rectifying filter circuit is connected to the input terminal of the transformer circuit, the output terminal of a secondary winding of the transformer circuit is connected to the input terminal of the multi-path dc output circuit, the output end of the other secondary winding of the voltage transformation circuit is connected with the output end of the control circuit, the input end of the multi-path direct current output circuit is connected with the input end of the sampling feedback circuit, and the output end of the sampling inverse circuit is connected with the input end of the control circuit.

Example 2: on the basis of embodiment 1, please refer to fig. 2, the grid input circuit includes a 220V mains voltage, an L terminal of the 220V mains voltage is connected to a 3 terminal of a capacitor C1 and a common mode inductor LF through a fuse FU, an N terminal of the 220V mains voltage is connected to the other terminal of the capacitor C1 and a 1 terminal of the common mode inductor LF, a 4 terminal of the common mode inductor LF is connected to a 1 terminal of a capacitor C2, a capacitor C3 and a rectifier T, a 2 terminal of the common mode inductor LF is connected to the other terminal of a capacitor C2, a capacitor C4 and a 3 terminal of a rectifier T, a port 2 of the rectifier T is connected to the other terminal of a capacitor C3, the other terminal of a capacitor C4 and a ground terminal, a port 4 of the rectifier T is connected to an anode of a capacitor C5, a capacitor C6, a resistor R1, a capacitor C8 and a synonym terminal of a primary winding of a transformer W, a synonym terminal of the primary winding of the transformer W is connected to an anode of a diode D1 and a cathode of a diode D1 is connected to the other terminal of a resistor R1, the cathode of the diode D2 is connected with the pin D of the power management chip IC1, the pin FR of the power management chip IC1 is connected with the resistor R6 and the resistor R7, the pin BP of the power management chip IC1 is connected with the cathode of the capacitor C5, the pin S of the power management chip IC1, the resistor R7, the anode of the diode D7 and the capacitor C16 through the capacitor C7, the dotted end of the secondary winding W1 of the transformer W is connected with the other end of the capacitor C16 and the other end of the resistor R6, the dotted end of the secondary winding W1 of the transformer W is connected with the cathode of the diode D7, the dotted end of the secondary winding W3 of the transformer W is connected with the cathode of the diode D4, the anode of the capacitor C9 and the port 2 of the voltage regulator IC2 through the anode of the diode D3, the dotted end of the secondary winding W3 is connected with the dotted end of the secondary winding W2 of the capacitor C3982, the other end of the capacitor C8, the anode of the other end of the capacitor C4, the anode of the diode D5 and the cathode of the capacitor C9, An anode of a capacitor C10, a potentiometer RP 10, a slider end of the potentiometer RP 10, a capacitor C10, a cathode of the light emitting diode LED 10, a cathode of the capacitor C10, a capacitor C10 and a ground end, a port 1 of the regulator IC 10 is connected with the other end of the potentiometer RP 10, a resistor R10, an anode of the diode D10 and the other end of the capacitor C10, a port 3 of the regulator IC 10 is connected with the other end of the resistor R10, a cathode of the diode D10, an anode of the capacitor C10, the other end of the capacitor C10 and a dc output voltage + U10, a cathode of the diode D10 is connected with the resistor R10 and the dc output voltage + U10-1, the other end of the resistor R10 is connected with an anode of the light emitting diode LED 10, a secondary winding 10 of the transformer W is connected with a cathode of the diode C10 and a cathode 10 of the capacitor C10, the other end of the potentiometer RP2 and the resistor R5 are connected to port 1 of the regulator IC3, and the other end of the resistor R5, the negative electrode of the capacitor C14, the capacitor C15 and the dc output voltage-U3 are connected to port 3 of the regulator IC 3.

Example 3: in embodiment 2, please refer to fig. 3, all of the pin 1, the pin 2, the pin 7, and the pin 8 of the LNK564 power management chip are MOS source electrodes, with reference to ground, the pin 3 of the LNK564 power management chip is a power supply voltage, an external pin bypass capacitor, the pin 4 of the LNK564 power management chip is a feedback signal input, and is controlled by intentional voltage stabilization, the pin 5 of the LNK564 power management chip is a MOS drain electrode, and the pin 6 of the LNK564 power management chip is a dummy pin.

The utility model discloses a theory of operation is: the power grid is input with direct current by filtering, rectifying and filtering, wherein a capacitor C8, a resistor R1 and a diode D1 are RCD clamping circuits, an offline switch of a power management chip IC1 works under a constant limiting current to provide primary diner limitation cycle by cycle, when an output point aunt exceeds a reference value, the internal of the power management chip IC1 regulates output voltage by switch control, a sampling circuit is formed by the diode D7 and the capacitor C16 to feed back the output voltage to a pin FB of the power management chip IC1, when the output voltage is normal, a switch in the power management chip IC1 is cut off, when the current flowing into the pin FB of the power management chip IC1 is smaller than a specified value, the internal of the power management chip IC1 is turned on and turned on in a specified switch period specified by a clock module in the power management chip IC1, when the current flowing through the switch exceeds the current limitation, and after the switching period is finished, the flyback topology structure is used as a circuit to improve the conversion efficiency and the output power, the final output voltage is input into the voltage stabilizer IC2-IC3 through the transformer W, and the output direct-current voltage can be further regulated through the potentiometers RP1-RP 2.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A power supply device for direct current electronic equipment comprises a power grid input circuit, a power grid noise filter circuit, a rectification filter circuit, a voltage transformation circuit, a control circuit, a sampling circuit and a multi-path direct current output circuit, and is characterized in that 220V voltage is output from the output end of the power grid input circuit and input into the input end of the power grid noise filter circuit, the output end of the power grid noise filter circuit is connected with the input end of the rectification filter circuit, the output end of the rectification filter circuit is connected with the input end of the voltage transformation circuit, the output end of one secondary winding of the voltage transformation circuit is connected with the input end of the multi-path direct current output circuit, the output end of the other secondary winding of the voltage transformation circuit is connected with the output end of the control circuit, the input end of the multi-path direct current output circuit is connected with the input end of a sampling feedback circuit, and the output end of a sampling inverse circuit is connected with the input end of the control circuit.

2. The apparatus of claim 1, wherein the grid input circuit comprises a 220V mains voltage, the L terminal of the 220V mains voltage is connected to the 3 terminals of the capacitor C1 and the common mode inductor LF through the fuse FU, the N terminal of the 220V mains voltage is connected to the other terminal of the capacitor C1 and the 1 terminal of the common mode inductor LF, the 4 terminal of the common mode inductor LF is connected to the 1 terminal of the capacitor C2, the capacitor C3 and the rectifier T, the 2 terminal of the common mode inductor LF is connected to the other terminal of the capacitor C2, the capacitor C4 and the 3 terminal of the rectifier T, the port 2 of the rectifier T is connected to the other terminal of the capacitor C3, the other terminal of the capacitor C4 and the ground terminal, the port 4 of the rectifier T is connected to the anode of the capacitor C5, the capacitor C6, the resistor R1, the capacitor C8 and the different name terminal of the primary winding of the transformer W, the same name terminal of the primary winding of the transformer W is connected to the anode of the diode D1 and the anode of the diode D2, the cathode of a diode D1 is connected with the other end of a capacitor C6 and the other end of a resistor R1, the cathode of a diode D2 is connected with a pin D of a power management chip IC1, a pin FR of a power management chip IC1 is connected with a resistor R6 and a resistor R7, a pin BP of a power management chip IC1 is connected with the cathode of a capacitor C5, a pin S of a power management chip IC1, a resistor R7, the anode of a diode D7 and a capacitor C16 through a capacitor C7, the dotted terminal of a secondary winding W1 of a transformer W is connected with the other end of the capacitor C16 and the other end of a resistor R6, the dotted terminal of a secondary winding W1 of the transformer W is connected with the cathode of a diode D7, the dotted terminal of the dotted terminal W3 of the transformer W is connected with the cathode of the diode D4, the anode of the capacitor C9, the port 2 of a voltage stabilizer IC2 through the anode of a diode D3, the dotted terminal of the dotted terminal W of the transformer W3 is connected with the dotted terminal W2 and the dotted terminal of the dotted terminal W of the transformer W8, The diode D comprises an anode of a diode D, a cathode of the diode D, an anode of a capacitor C, an anode of the capacitor C, a potentiometer RP, a slider end of the potentiometer RP, the capacitor C, a cathode of a light-emitting diode LED, a cathode of the capacitor C, a capacitor C and a ground end, a port 1 of a voltage stabilizer IC is connected with the other end of the potentiometer RP, a resistor R, an anode of the diode D and the other end of the capacitor C, a port 3 of the voltage stabilizer IC is connected with the other end of the resistor R, the cathode of the diode D, the anode of the capacitor C, the other end of the capacitor C and a direct-current output voltage + U, the cathode of the diode D is connected with the resistor R and the direct-current output voltage + U-1, the other end of the resistor R is connected with the anode of the light-emitting diode LED, and a synonym end of a secondary winding W of a transformer W is connected with the anode of the diode D through the cathode of the diode D, The negative electrode of the capacitor C10 and the port 2 of the voltage stabilizer IC3, the port 1 of the voltage stabilizer IC3 is connected with the other end of the potentiometer RP2 and the resistor R5, and the port 3 of the voltage stabilizer IC3 is connected with the other end of the resistor R5, the negative electrode of the capacitor C14, the capacitor C15 and the direct-current output voltage-U3.

3. The power supply device of claim 2, wherein the common mode inductor LF and the capacitor C1-C4 form a grid noise filter circuit, the rectifier T and the capacitor C5 form a rectifier filter circuit, the transformer W forms a transformer circuit, the capacitors C6-C7, the resistor R1, the diodes D1-D2 and the power management chip IC1 form a control circuit, the resistors R6-R7, the diode D7 and the capacitor C16 form a sampling circuit, and the voltage regulator IC2-IC3, the diodes D3-D8, the capacitors C9-C15 and the potentiometer RP1-RP2 form a multi-path dc output circuit.

4. The apparatus according to claim 3, wherein said power management IC1 is selected from LNK564 power management chip.

5. The apparatus as claimed in claim 4, wherein the voltage regulator IC2-IC3 is LM371 three terminal integrated voltage regulator.

6. The apparatus according to claim 5, wherein said transformer W is an EE16 transformer.

7. The apparatus as claimed in claim 2, wherein the diodes D1-D13 are 1N4001 diodes.