CN214315079U - Low-loss power supply circuit of integrated circuit chip - Google Patents
Low-loss power supply circuit of integrated circuit chip Download PDFInfo
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- CN214315079U CN214315079U CN202120511455.5U CN202120511455U CN214315079U CN 214315079 U CN214315079 U CN 214315079U CN 202120511455 U CN202120511455 U CN 202120511455U CN 214315079 U CN214315079 U CN 214315079U
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Abstract
The utility model relates to a low-loss power supply circuit of an integrated circuit chip, which comprises a first rectifying unit, an isolation voltage-reducing unit and a second rectifying unit; when the alternating current voltage-reducing integrated circuit is used, the first rectifying unit rectifies 220V alternating current commercial power into direct current which is output to the isolation voltage-reducing unit, the isolation voltage-reducing unit isolates and reduces the voltage of the direct current output by the first rectifying unit and outputs the alternating current after voltage reduction to the second rectifying unit, and the second rectifying unit rectifies the alternating current after voltage reduction output by the isolation voltage-reducing unit and outputs the alternating current to the integrated circuit chip; the third rectifying unit rectifies the alternating current output by the isolation voltage-reducing unit after voltage reduction and outputs the rectified alternating current to the voltage setting unit, and the voltage setting unit controls the input duty ratio of the isolation voltage-reducing unit to achieve the purpose of controlling the output voltage of the isolation voltage-reducing unit to be stable; the voltage stabilizing circuit has the advantages that the input duty ratio of the isolation voltage reducing unit is adjusted to achieve the purposes of setting the output voltage and stabilizing the voltage, the power consumption of the isolation voltage reducing unit is reduced, the circuit is simple, the cost is low, and the size is small.
Description
Technical Field
The utility model relates to an integrated circuit chip technical field, more specifically say, relate to a low-loss integrated circuit chip's supply circuit.
Background
Most of the power supply circuits of the existing integrated circuit chips have large loss and cannot meet the use requirements of users.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a circuit simply, with low costs, the integrated circuit chip's of small low loss supply circuit.
The utility model provides a technical scheme that its technical problem adopted is:
constructing a power supply circuit of a low-loss integrated circuit chip, which comprises a first rectifying unit, an isolation voltage reduction unit and a second rectifying unit; the first rectifying unit rectifies 220V alternating-current mains supply into direct current, the direct current is output to the isolation voltage reduction unit for isolation voltage reduction, the isolation voltage reduction unit isolates and reduces the voltage of the direct current output by the first rectifying unit and outputs the reduced alternating current to the second rectifying unit, and the second rectifying unit rectifies the reduced alternating current output by the isolation voltage reduction unit and outputs the rectified alternating current to the integrated circuit chip for power supply;
the isolation voltage reduction unit further comprises a third rectification unit and a voltage setting unit, the third rectification unit rectifies the alternating current output by the isolation voltage reduction unit after voltage reduction and outputs the rectified alternating current to the voltage setting unit, and the voltage setting unit controls the input duty ratio of the isolation voltage reduction unit to achieve the purpose of controlling the output voltage of the isolation voltage reduction unit to be stable; the voltage setting unit also sets the output voltage of the isolation voltage reduction unit;
the first rectifying unit is connected with the isolation voltage-reducing unit, the isolation voltage-reducing unit is connected with the second rectifying unit and the third rectifying unit, the second rectifying unit and the third rectifying unit are both connected with the voltage setting unit, and the voltage setting unit is connected with the isolation voltage-reducing unit.
The utility model discloses a low-loss integrated circuit chip's supply circuit, wherein, the first rectifier unit includes rectifier bridge and polar electric capacity, the first input and the second input of rectifier bridge respectively with 220V exchange live wire and zero line one-to-one connection of commercial power; the positive output end of the rectifier bridge is connected with the positive electrode of the polar capacitor, the negative output end of the rectifier bridge is connected with the negative electrode of the polar capacitor, and the positive output end and the negative output end of the rectifier bridge are connected with the isolation voltage reduction unit.
The utility model discloses a low-loss integrated circuit chip's supply circuit, wherein, keep apart the step-down unit and include transformer and transient state suppression diode and fast recovery diode, the first end of the primary coil of transformer with the positive pole of transient state suppression diode is connected, the negative pole of transient state suppression diode with the negative pole of fast recovery diode is connected, the positive pole of fast recovery diode with the second end of the primary coil of transformer is connected; the first secondary coil of the transformer is connected with the second rectifying unit, and the second secondary coil of the transformer is connected with the third rectifying unit;
and the positive output end of the rectifier bridge is connected with the first end of the primary coil of the transformer, and the negative output end of the rectifier bridge is connected with the second end of the primary coil of the transformer.
The utility model discloses a power supply circuit of low-loss integrated circuit chip, wherein, the second rectification unit includes first diode, first electric capacity and inductance and second electric capacity; the anode of the first diode is connected with the first output end of the first secondary coil of the transformer, the cathode of the first diode is respectively connected with the first capacitor and the inductor, the other end of the first capacitor is connected with the second output end of the second secondary coil of the transformer, the other end of the inductor is connected with the second capacitor, and the other end of the second capacitor is connected with the second end of the second secondary coil; the other end of the inductor is an output positive terminal of a power supply circuit of the low-loss integrated circuit chip and is connected with a VCC (voltage converter) terminal of the integrated circuit chip, and a second output end of a second secondary coil of the transformer is an output negative terminal of the power supply circuit of the low-loss integrated circuit chip and is connected with a GND (ground) terminal of the integrated circuit chip.
Low-loss integrated circuit chip's supply circuit, wherein, the third rectification unit includes second diode and third electric capacity, the second diode the positive pole with the second secondary coil's of transformer first end is connected, the second diode the negative pole with third electric capacity is connected, the other end of third electric capacity with the second secondary coil's of transformer second end is connected, and still with the negative pole output of rectifier bridge is connected.
The utility model discloses a low-loss integrated circuit chip's supply circuit, wherein, voltage setting unit includes three-terminal switching power supply chip, photoelectric coupler and fourth electric capacity and first resistance;
the positive electrode of a light emitting diode of the photoelectric coupler is connected with a second resistor, the negative electrode of the light emitting diode of the photoelectric coupler is connected with a third resistor and a voltage stabilizing diode, the other end of the second resistor is connected with the negative electrode of the first diode, and the other end of the third resistor is also connected with the negative electrode of the first diode; the cathode of the voltage stabilizing diode is connected with the cathode of a light emitting diode of the photoelectric coupler, and the anode of the voltage stabilizing diode is connected with the second end of the second secondary coil of the transformer;
the drain electrode of the three-terminal switching power supply chip is connected with the second end of the primary coil of the transformer, and the source electrode of the three-terminal switching power supply chip is connected with the negative output end of the rectifier bridge; the input end of the backlight detector of the photoelectric coupler is connected with the negative electrode of the second diode, the output end of the backlight detector of the photoelectric coupler is connected with the control electrode of the three-terminal switching power supply chip, the output end of the backlight detector of the photoelectric coupler is further connected with the first resistor, the other end of the first resistor is connected with the fourth capacitor, and the other end of the fourth capacitor is connected with the source electrode of the three-terminal switching power supply chip.
The beneficial effects of the utility model reside in that: when the alternating current voltage-reducing integrated circuit is used, the first rectifying unit rectifies 220V alternating current commercial power into direct current, the direct current is output to the isolating voltage-reducing unit to be isolated and reduced in voltage, the isolating voltage-reducing unit isolates and reduces the voltage of the direct current output by the first rectifying unit and outputs the reduced alternating current to the second rectifying unit, and the second rectifying unit rectifies the reduced alternating current output by the isolating voltage-reducing unit and outputs the rectified alternating current to the integrated circuit chip to supply power; the isolation voltage reduction unit further comprises a third rectification unit and a voltage setting unit, the third rectification unit rectifies the alternating current output by the isolation voltage reduction unit after voltage reduction and outputs the rectified alternating current to the voltage setting unit, and the voltage setting unit controls the input duty ratio of the isolation voltage reduction unit to achieve the purpose of controlling the output voltage of the isolation voltage reduction unit to be stable; the voltage setting unit also sets the output voltage of the isolation voltage reduction unit; the input duty ratio of the isolation voltage reduction unit is adjusted to achieve the purposes of setting the output voltage and stabilizing the voltage, the power consumption of the isolation voltage reduction unit is reduced, the electric energy loss is greatly reduced, and the isolation voltage reduction unit is simple in circuit, low in cost and small in size.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to the drawings:
fig. 1 is a schematic circuit diagram of a power supply circuit of a low-loss ic chip according to a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The power supply circuit of the low-loss integrated circuit chip of the preferred embodiment of the present invention is shown in fig. 1, and includes a first rectifying unit 101, an isolation voltage-reducing unit 102, and a second rectifying unit 103; the first rectifying unit 101 rectifies 220V alternating current mains into direct current, and outputs the direct current to the isolation voltage reduction unit 102 for isolation voltage reduction, the isolation voltage reduction unit 102 isolates and reduces the direct current output by the first rectifying unit 101 and outputs the alternating current after voltage reduction to the second rectifying unit 103, and the second rectifying unit 103 rectifies the alternating current after voltage reduction output by the isolation voltage reduction unit 102 and outputs the rectified alternating current to an integrated circuit chip (not shown in the figure) for power supply;
the isolation step-down unit 102 further includes a third rectifying unit 1021 and a voltage setting unit 1022, the third rectifying unit 1021 rectifies the ac power output by the isolation step-down unit 102 after being stepped down, and outputs the rectified ac power to the voltage setting unit 1022, and the voltage setting unit 1022 controls the input duty ratio of the isolation step-down unit 102 to achieve the purpose of controlling the output voltage of the isolation step-down unit 102 to be stable; the voltage setting unit 1022 also sets the output voltage of the isolated step-down unit 102;
the first rectifying unit 101 is connected with an isolation step-down unit 102, the isolation step-down unit 102 is connected with a second rectifying unit 103 and a third rectifying unit 1021, the second rectifying unit 103 and the third rectifying unit 1021 are both connected with a voltage setting unit 1022, and the voltage setting unit 1022 is connected with the isolation step-down unit 102;
when the alternating current voltage-reducing integrated circuit is used, the first rectifying unit 101 rectifies 220V alternating current commercial power into direct current, the direct current is output to the isolation voltage-reducing unit 102 for isolation voltage reduction, the isolation voltage-reducing unit 102 isolates the direct current output by the first rectifying unit 101 for voltage reduction and outputs the alternating current after voltage reduction to the second rectifying unit 103, and the second rectifying unit 103 rectifies the alternating current after voltage reduction output by the isolation voltage-reducing unit 102 and outputs the alternating current to the integrated circuit chip for power supply; the isolation step-down unit 102 further includes a third rectifying unit 1021 and a voltage setting unit 1022, the third rectifying unit 1021 rectifies the ac power output by the isolation step-down unit 102 after being stepped down, and outputs the rectified ac power to the voltage setting unit 1022, and the voltage setting unit 1022 controls the input duty ratio of the isolation step-down unit 102 to achieve the purpose of controlling the output voltage of the isolation step-down unit 102 to be stable; the voltage setting unit 1022 also sets the output voltage of the isolated step-down unit 102; the power consumption of the isolation voltage reduction unit 102 is reduced while the output voltage is set and stabilized by adjusting the input duty ratio, so that the power consumption is greatly reduced, and the isolation voltage reduction unit is simple in circuit, low in cost and small in size.
As shown in fig. 1, the first rectifying unit 101 includes a rectifying bridge BR1 and a polar capacitor C2, and a first input end and a second input end of the rectifying bridge BR1 are respectively connected to the live line and the neutral line of the 220V ac mains in a one-to-one manner; the positive output end of the rectifier bridge BR1 is connected with the positive electrode of the polar capacitor C2, the negative output end of the rectifier bridge BR1 is connected with the negative electrode of the polar capacitor C2, and the positive output end and the negative output end of the rectifier bridge BR1 are both connected with the isolated voltage reduction unit 102; the circuit is simple, the cost is low, and the volume is small.
As shown in fig. 1, the isolation buck unit 102 includes a transformer TR1, a transient suppression diode D1, and a fast recovery diode D2, a first terminal of a primary winding of the transformer TR1 is connected to a positive terminal of the transient suppression diode D1, a negative terminal of the transient suppression diode D1 is connected to a negative terminal of the fast recovery diode D2, and a positive terminal of the fast recovery diode D2 is connected to a second terminal of the primary winding of the transformer TR 1; a first secondary coil of the transformer TR1 is connected to the second rectifying unit 103 and a second secondary coil is connected to the third rectifying unit 1021;
a positive output end of the rectifier bridge BR1 is connected with a first end of the primary coil of the transformer TR1, and a negative output end is connected with a second end of the primary coil of the transformer TR 1; the circuit is simple, the cost is low, and the volume is small.
As shown in fig. 1, the second rectification unit 103 includes a first diode D3, a first capacitor C3, an inductor L1, and a second capacitor C4; the positive electrode of the first diode D3 is connected with the first output end of the first secondary coil of the transformer TR1, the negative electrode of the first diode D3 is respectively connected with a first capacitor C3 and an inductor L1, the other end of the first capacitor C3 is connected with the second output end of the second secondary coil of the transformer TR1, the other end of the inductor L1 is connected with the second capacitor C4, and the other end of the second capacitor C4 is connected with the second end of the second secondary coil; the other end of the inductor L1 is the output positive terminal of the power supply circuit of the low-loss integrated circuit chip and is connected to the VCC terminal of the integrated circuit chip, and the second output terminal of the second secondary winding of the transformer TR1 is the output negative terminal of the power supply circuit of the low-loss integrated circuit chip and is connected to the GND terminal of the integrated circuit chip.
As shown in fig. 1, the third rectifying unit 1021 includes a second diode D4 and a third capacitor C5, wherein an anode of the second diode D4 is connected to a first end of the second secondary winding of the transformer TR1, a cathode of the second diode D4 is connected to the third capacitor C5, and another end of the third capacitor C5 is connected to a second end of the second secondary winding of the transformer TR1 and is further connected to a cathode output terminal of the rectifying bridge BR 1.
As shown in fig. 1, the voltage setting unit 1022 includes a three-terminal switching power chip I C1, a photo-coupler U1, a fourth capacitor C8, and a first resistor R3;
the positive electrode of a light emitting diode of the photocoupler U1 is connected with a second resistor R1, the negative electrode of the light emitting diode is connected with a third resistor R2 and a voltage stabilizing diode D5, the other end of the second resistor R1 is connected with the negative electrode of a first diode D3, and the other end of the third resistor R2 is also connected with the negative electrode of a first diode D3; the cathode of the voltage stabilizing diode D5 is connected with the cathode of a light emitting diode of the photoelectric coupler U1, and the anode of the voltage stabilizing diode D5 is connected with the second end of the second secondary coil of the transformer TR 1;
the drain electrode of the three-terminal switching power supply chip I C1 is connected with the second terminal of the primary coil of the transformer TR1, and the source electrode of the three-terminal switching power supply chip I C1 is connected with the negative output end of the rectifier bridge BR 1; the input end of the backlight detector of the photoelectric coupler U1 is connected with the negative electrode of the second diode D4, the output end of the backlight detector of the photoelectric coupler U1 is connected with the control electrode of the three-terminal switching power supply chip I C1, the output end of the backlight detector of the photoelectric coupler U1 is also connected with a first resistor R3, the other end of the first resistor R3 is connected with a fourth capacitor C8, and the other end of the fourth capacitor C8 is connected with the source electrode of the three-terminal switching power supply chip I C1.
In the embodiment of the invention, the voltage between the output positive terminal and the output negative terminal of the power supply circuit of the low-loss integrated circuit chip is determined by the voltage drop of the voltage stabilizing diode D5, the light emitting diode of the photocoupler U1 and the second resistor R1; the third resistor R2 is used for dummy load to improve the load regulation rate under light load; the third rectifying unit 1021 provides a control voltage for the three-terminal switching power chip I C1, wherein the current of the control electrode of the three-terminal switching power chip I C1 is regulated by the third resistor R2 and the zener diode D5, and the output duty ratio is changed by matching with the load, so as to achieve the purposes of voltage stabilization and low loss.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (6)
1. A low-loss power supply circuit of an integrated circuit chip comprises a first rectifying unit, an isolation voltage reduction unit and a second rectifying unit; the alternating current rectification circuit is characterized in that a 220V alternating current commercial power is rectified into direct current by the first rectification unit and output to the isolation voltage reduction unit for isolation voltage reduction, the isolation voltage reduction unit performs isolation voltage reduction on the direct current output by the first rectification unit and outputs the alternating current after voltage reduction to the second rectification unit, and the second rectification unit rectifies the alternating current after voltage reduction output by the isolation voltage reduction unit and outputs the rectified alternating current to the integrated circuit chip for power supply;
the isolation voltage reduction unit further comprises a third rectification unit and a voltage setting unit, the third rectification unit rectifies the alternating current output by the isolation voltage reduction unit after voltage reduction and outputs the rectified alternating current to the voltage setting unit, and the voltage setting unit controls the input duty ratio of the isolation voltage reduction unit to achieve the purpose of controlling the output voltage of the isolation voltage reduction unit to be stable; the voltage setting unit also sets the output voltage of the isolation voltage reduction unit;
the first rectifying unit is connected with the isolation voltage-reducing unit, the isolation voltage-reducing unit is connected with the second rectifying unit and the third rectifying unit, the second rectifying unit and the third rectifying unit are both connected with the voltage setting unit, and the voltage setting unit is connected with the isolation voltage-reducing unit.
2. The power supply circuit of the low-loss integrated circuit chip as claimed in claim 1, wherein the first rectifying unit comprises a rectifying bridge and a polar capacitor, and a first input end and a second input end of the rectifying bridge are respectively connected with a live wire and a zero wire of the 220V alternating current mains supply in a one-to-one manner; the positive output end of the rectifier bridge is connected with the positive electrode of the polar capacitor, the negative output end of the rectifier bridge is connected with the negative electrode of the polar capacitor, and the positive output end and the negative output end of the rectifier bridge are connected with the isolation voltage reduction unit.
3. The power supply circuit of low-loss ic chip as claimed in claim 2, wherein said isolated voltage dropping unit comprises a transformer and a transient suppression diode and a fast recovery diode, a first end of a primary winding of said transformer is connected to an anode of said transient suppression diode, a cathode of said transient suppression diode is connected to a cathode of said fast recovery diode, and an anode of said fast recovery diode is connected to a second end of said primary winding of said transformer; the first secondary coil of the transformer is connected with the second rectifying unit, and the second secondary coil of the transformer is connected with the third rectifying unit;
and the positive output end of the rectifier bridge is connected with the first end of the primary coil of the transformer, and the negative output end of the rectifier bridge is connected with the second end of the primary coil of the transformer.
4. The power supply circuit of a low-loss integrated circuit chip as claimed in claim 3, wherein said second rectifying unit comprises a first diode, a first capacitor and an inductor, and a second capacitor; the anode of the first diode is connected with the first output end of the first secondary coil of the transformer, the cathode of the first diode is respectively connected with the first capacitor and the inductor, the other end of the first capacitor is connected with the second output end of the second secondary coil of the transformer, the other end of the inductor is connected with the second capacitor, and the other end of the second capacitor is connected with the second end of the second secondary coil; the other end of the inductor is an output positive terminal of a power supply circuit of the low-loss integrated circuit chip and is connected with a VCC (voltage converter) terminal of the integrated circuit chip, and a second output end of a second secondary coil of the transformer is an output negative terminal of the power supply circuit of the low-loss integrated circuit chip and is connected with a GND (ground) terminal of the integrated circuit chip.
5. The power supply circuit of the low-loss integrated circuit chip as claimed in claim 4, wherein the third rectifying unit comprises a second diode and a third capacitor, an anode of the second diode is connected to the first end of the second secondary winding of the transformer, a cathode of the second diode is connected to the third capacitor, and another end of the third capacitor is connected to the second end of the second secondary winding of the transformer and further connected to the cathode output terminal of the rectifying bridge.
6. The power supply circuit of low-loss IC chip as claimed in claim 5, wherein said voltage setting unit comprises a three-terminal switching power chip, a photocoupler, a fourth capacitor and a first resistor;
the positive electrode of a light emitting diode of the photoelectric coupler is connected with a second resistor, the negative electrode of the light emitting diode of the photoelectric coupler is connected with a third resistor and a voltage stabilizing diode, the other end of the second resistor is connected with the negative electrode of the first diode, and the other end of the third resistor is also connected with the negative electrode of the first diode; the cathode of the voltage stabilizing diode is connected with the cathode of a light emitting diode of the photoelectric coupler, and the anode of the voltage stabilizing diode is connected with the second end of the second secondary coil of the transformer;
the drain electrode of the three-terminal switching power supply chip is connected with the second end of the primary coil of the transformer, and the source electrode of the three-terminal switching power supply chip is connected with the negative output end of the rectifier bridge; the input end of the backlight detector of the photoelectric coupler is connected with the negative electrode of the second diode, the output end of the backlight detector of the photoelectric coupler is connected with the control electrode of the three-terminal switching power supply chip, the output end of the backlight detector of the photoelectric coupler is further connected with the first resistor, the other end of the first resistor is connected with the fourth capacitor, and the other end of the fourth capacitor is connected with the source electrode of the three-terminal switching power supply chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120511455.5U CN214315079U (en) | 2021-03-10 | 2021-03-10 | Low-loss power supply circuit of integrated circuit chip |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120511455.5U CN214315079U (en) | 2021-03-10 | 2021-03-10 | Low-loss power supply circuit of integrated circuit chip |
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| CN214315079U true CN214315079U (en) | 2021-09-28 |
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