CN222050775U - A voltage stabilizing circuit for IC power supply - Google Patents
A voltage stabilizing circuit for IC power supply Download PDFInfo
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- CN222050775U CN222050775U CN202420799086.8U CN202420799086U CN222050775U CN 222050775 U CN222050775 U CN 222050775U CN 202420799086 U CN202420799086 U CN 202420799086U CN 222050775 U CN222050775 U CN 222050775U
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Abstract
本实用新型实施例提供的一种用于IC供电的稳压电路，包括供电电源、稳压模块、三极管和延迟启动模块；稳压模块的一端分别与供电电源和三极管的基极连接，另一端与接地端连接；三极管的源极与供电电源连接；三极管的发射极分别与IC和延迟启动模块的输入端连接，延迟启动模块的输出端与接地端连接；上述技术方案，通过稳压模块将三极管基极电压稳压，使得三极管发射极外接的IC电阻变化时，三极管基极电压不变，基极电流变化使得发射极电流变化，进而补偿因电阻变化带来的三极管发射极电压的变化，以保证输出稳定的电压；同时设置延迟启动模块，分走三极管发射极流向IC的电流，以实现对IC的延迟启动功能。
The utility model provides a voltage stabilizing circuit for IC power supply, comprising a power supply, a voltage stabilizing module, a transistor and a delayed start module; one end of the voltage stabilizing module is respectively connected to the power supply and the base of the transistor, and the other end is connected to the ground; the source of the transistor is connected to the power supply; the emitter of the transistor is respectively connected to the input end of the IC and the delayed start module, and the output end of the delayed start module is connected to the ground; the above technical scheme stabilizes the base voltage of the transistor through the voltage stabilizing module, so that when the resistance of the IC externally connected to the emitter of the transistor changes, the base voltage of the transistor remains unchanged, and the change of the base current causes the emitter current to change, thereby compensating for the change of the emitter voltage of the transistor caused by the change of the resistance, so as to ensure the output of a stable voltage; at the same time, a delayed start module is provided to divide the current flowing from the emitter of the transistor to the IC, so as to realize the delayed start function of the IC.
Description
Technical Field
The embodiment of the utility model relates to the technical field of electronic circuits, in particular to a voltage stabilizing circuit for IC power supply.
Background
Power supplies are a necessary condition for the operation of various electronic devices and electronic components. In some circuit systems, the input voltage is higher, such as some power amplifiers or regulated power supplies, and the functions can be completed by only using a single chip and peripheral passive devices. These chips require a low voltage power supply to ensure proper operation of the chip and do not require high voltage accuracy.
At this time, the special voltage-stabilizing chip is less in selection or higher in price, the working current can not meet the chip requirement when the voltage-stabilizing tube is singly used, the voltage-stabilizing tube is easy to overflow and damage, the chip is damaged, and the stability is poor.
Disclosure of utility model
The utility model provides a voltage stabilizing circuit for IC power supply, which stabilizes the base voltage of a triode through a voltage stabilizing module, so that when the resistance of an IC externally connected with an emitter of the triode changes, the base voltage of the triode is unchanged, the base current changes to change the current of the emitter, and further the change of the emitter voltage of the triode caused by the resistance change is compensated, so that the stability of the output voltage is ensured.
In a first aspect, an embodiment of the present utility model provides a voltage stabilizing circuit for supplying power to an IC, including a power supply, a voltage stabilizing module, a triode, and a delay start module;
One end of the voltage stabilizing module is connected with the power supply and the base electrode of the triode respectively, and the other end of the voltage stabilizing module is connected with the grounding end; the source electrode of the triode is connected with the power supply; the emitter of the triode is respectively connected with the IC and the input end of the delay starting module, and the output end of the delay starting module is connected with the grounding end; when the power supply supplies power to the IC, the current Ie of the triode emitter satisfies ie=i1+i2, where I1 is the current flowing to the IC, and I2 is the current flowing to the delay start module.
Optionally, the voltage stabilizing circuit further comprises a status light; the input end of the status lamp is connected with the emitting electrode of the triode, and the output end of the status lamp is connected with the load end.
Optionally, the voltage stabilizing module comprises a voltage stabilizing diode, wherein the cathode of the voltage stabilizing diode is respectively connected with the power supply and the base electrode of the triode, and the anode of the voltage stabilizing diode is connected with the grounding end.
Optionally, the voltage stabilizing circuit further includes a first current limiting resistor, one end of the first current limiting resistor is connected with the power supply, and the other end of the first current limiting resistor is connected with the base electrode of the triode to limit the base current of the triode.
Optionally, the voltage stabilizing circuit further includes a second current limiting resistor, one end of the second current limiting resistor is connected with the power supply, and the other end of the second current limiting resistor is connected with the source electrode of the triode, so that current flowing to the emitter electrode from the source electrode of the triode is limited.
Optionally, the voltage stabilizing circuit further includes a first filtering module; one end of the first filtering module is connected with the power supply, and the other end of the first filtering module is connected with the base electrode of the triode.
Optionally, the first filtering module includes a filtering diode, a cathode of the filtering diode is used as one end of the first filtering module to be connected with the power supply, and an anode of the filtering diode is used as the other end of the first filtering module to be connected with the base electrode of the triode.
Optionally, the voltage stabilizing circuit further comprises a second filtering module, wherein one end of the second filtering module is connected with the power supply and one end of the voltage stabilizing module respectively; the other end of the second filtering module is connected with the other end of the voltage stabilizing module and then grounded.
Optionally, the second filtering module includes a first capacitor and a second capacitor connected in parallel, where the first capacitor and the second capacitor are sequentially connected in parallel at two ends of the voltage stabilizing module.
Optionally, the delay starting module includes a third capacitor, an anode of the third capacitor is connected with an emitter of the triode and the IC, and a cathode of the third capacitor is connected with the ground terminal.
The voltage stabilizing circuit for IC power supply provided by the embodiment of the utility model comprises a power supply, a voltage stabilizing module, a triode and a delay starting module; one end of the voltage stabilizing module is connected with the power supply and the base electrode of the triode respectively, and the other end of the voltage stabilizing module is connected with the grounding end; the source electrode of the triode is connected with a power supply; the emitter of the triode is respectively connected with the input ends of the IC and the delay starting module, and the output end of the delay starting module is connected with the grounding end; when the power supply supplies power to the IC, the current Ie of the triode emitter meets I1+I2=ie, wherein I1 is the current flowing to the IC, and I2 is the current flowing to the delay starting module; according to the technical scheme, the voltage of the base electrode of the triode is stabilized through the voltage stabilizing module, so that when the resistance of an IC (integrated circuit) externally connected with the emitter of the triode changes, the voltage of the base electrode of the triode is unchanged, the current of the emitter changes due to the change of the base electrode, and further the change of the voltage of the emitter of the triode caused by the change of the resistance is compensated, so that the stability of the output voltage is ensured, the problem of the stability of low-voltage power supply of a chip in a high-voltage circuit system is solved, and the low-cost voltage stabilized power supply is realized; meanwhile, a delay starting module is arranged to separate the current flowing to the IC from the triode emitter so as to realize the function of delay starting the IC.
Drawings
Fig. 1 is a circuit configuration diagram of a voltage stabilizing circuit for IC power supply according to an embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
The terminology used in the embodiments of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present utility model are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present utility model. In addition, in the context, it will also be understood that when an element is referred to as being formed "on" or "under" another element, it can be directly formed "on" or "under" the other element or be indirectly formed "on" or "under" the other element through intervening elements. The terms "first," "second," and the like, are used for descriptive purposes only and not for any order, quantity, or importance, but rather are used to distinguish between different components. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The term "comprising" and variants thereof as used herein is intended to be open ended, i.e., including, but not limited to. The term "based on" is based at least in part on. The term "one embodiment" means "at least one embodiment".
It should be noted that the terms "first," "second," and the like herein are merely used for distinguishing between corresponding contents and not for defining a sequential or interdependent relationship.
It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those skilled in the art will appreciate that "one or more" is intended to be construed as "one or more" unless the context clearly indicates otherwise.
Fig. 1 is a circuit configuration diagram of a voltage stabilizing circuit for IC power supply according to an embodiment of the present utility model, and referring to fig. 1, the circuit includes a power supply +v, a voltage stabilizing module 10, a triode Q, and a delay start module 20; one end of the voltage stabilizing module 10 is respectively connected with a power supply +V and a base b of the triode Q, and the other end of the voltage stabilizing module is connected with a ground end GND; the source electrode c of the triode is connected with a power supply +V; the emitter e of the triode is respectively connected with the IC and the input end of the delay starting module 20, and the output end of the delay starting module 20 is connected with the ground end GND; when the power supply +v supplies power to the IC, the current Ie of the emitter e of the triode Q satisfies ie=i1+i2, where I1 is the current flowing to the IC and I2 is the current flowing to the delay start module.
Specifically, referring to fig. 1, when the triode Q is turned on and is in a static working state, the emitter e thereof is an output port of the circuit, and the IC is connected with the emitter e; as the accessed IC changes, the resistances of different ICs are different, as known from ve=ie×re, when the resistance of the IC changes, the resistance connected to the emitter e is driven to change, so that the voltage of the output end of the voltage stabilizing circuit, i.e. the emitter e of the triode Q, changes; for example, when the resistance of the IC becomes small, the voltage Ve becomes small due to the emitter voltage ve=ie×re, and referring to fig. 1, the voltage stabilizing module 10 is connected to the power supply +v and the base b of the transistor Q to stabilize the base voltage Vb, and as can be seen from vbe=vb-Ve, the emitter voltage Ve becomes small due to the base voltage Vb of the transistor being unchanged, resulting in the voltage Vbe between the base and the emitter becoming large; the current ib=vbe/Rbe flowing through the base b of the triode becomes larger, and Ib increases under the condition that the resistance Rbe between the internal base and the emitter of the triode is unchanged; as is clear from ie=βib, ib increases, the emitter current Ie also increases, and ve=ie×re indicates that Ie increases, ve also increases, thereby compensating for Ve changes due to resistance changes, ve being unchanged, so that the voltage supplied to the IC remains unchanged. Meanwhile, when the power supply +V supplies power to the IC, the triode Q emitter e is respectively connected with the delay starting module 20 and the IC, so that the output current is divided into two parts, namely the current I1 flowing to the IC and the current I2 flowing to the delay starting module, so that the time for the IC to reach the starting voltage is increased, and the delay starting effect is further achieved.
The voltage stabilizing circuit for IC power supply provided by the embodiment of the utility model comprises a power supply, a voltage stabilizing module, a triode and a delay starting module; one end of the voltage stabilizing module is connected with the power supply and the base electrode of the triode respectively, and the other end of the voltage stabilizing module is connected with the grounding end; the source electrode of the triode is connected with a power supply; the emitter of the triode is respectively connected with the input ends of the IC and the delay starting module, and the output end of the delay starting module is connected with the grounding end; when the power supply supplies power to the IC, the current Ie of the triode emitter meets ie=I1+I2, wherein I1 is the current flowing to the IC, and I2 is the current flowing to the delay starting module; according to the technical scheme, the base voltage of the triode is stabilized through the voltage stabilizing module, so that when the resistance of an IC externally connected with the triode emitter is changed, the base voltage of the triode is unchanged, the base current is changed to change the emitter current, and further the change of the triode emitter voltage caused by the resistance change is compensated, so that stable output voltage is ensured, the problem of stability of low-voltage power supply of a chip in a high-voltage circuit system is solved, and the low-cost voltage-stabilizing power supply is realized; meanwhile, a delay starting module is arranged to separate the current flowing to the IC from the triode emitter so as to realize the function of delay starting the IC.
Optionally, referring to fig. 1, the voltage stabilizing module 10 includes a voltage stabilizing diode Z1, wherein a cathode of the voltage stabilizing diode Z1 is connected to the power supply +v and the base b of the triode Q, respectively, and an anode of the voltage stabilizing diode Z1 is connected to the ground GND.
Specifically, the cathode of the zener diode Z1 is connected to the base b of the transistor Q, and the zener diode Z1 is a zener diode, and as is known in the characteristics, in the reverse bias region, the voltage is blocked until the zener diode breakdown voltage is reached. At this time, the reverse current through the zener diode increases sharply, but even if the zener current varies, the zener voltage across the device remains unchanged. Therefore, the zener diode Z1 stabilizes the base voltage Vb within a preset range.
Optionally, referring to fig. 1, the circuit further includes a first current limiting resistor R1, where one end of the first current limiting resistor R1 is connected to the power supply +v, and the other end is connected to the base b of the triode, so as to limit the base current of the triode.
Specifically, referring to fig. 1, a first current limiting resistor R1 is disposed between a power supply +v and a base b of the triode, and is used for limiting a current flowing to the base b of the triode so as to control a switching state of the triode.
Optionally, the circuit further includes a second current limiting resistor R2, where one end of the second current limiting resistor R2 is connected to the power supply +v, and the other end is connected to the source c of the triode, so as to limit the current flowing from the source c to the emitter e of the triode.
Specifically, referring to fig. 1, the second current limiting resistor R2 is disposed between the power supply +v and the source c of the triode, and when the triode Q is turned on, the power supply +v supplies power to the IC through the triode Q, and the power supply current flows through the second current limiting resistor R2, so that the power supply current value output by the emitter e can be limited through the second current limiting resistor R2.
Optionally, the circuit further comprises a first filtering module 30; one end of the first filtering module 30 is connected with the power supply +v, and the other end is connected with the base b of the triode to filter the voltage output to the triode Q.
The first filter module 30 includes a filter diode Z2, wherein a cathode of the filter diode Z2 is connected to the power supply +v as one end of the first filter module 30, and an anode of the filter diode Z2 is connected to the base b of the triode as the other end of the first filter module 30.
Specifically, referring to fig. 1, a power supply +v is connected to a base b of the triode to provide an on voltage to the triode Q, and a filtering diode Z2 is provided and connected between the power supply +v and the base b of the triode to filter the on voltage provided to the base b of the triode.
Optionally, the circuit further includes a second filtering module 40, where one end of the second filtering module 40 is connected to the power supply +v and one end of the voltage stabilizing module 10, respectively; the other end of the second filtering module 40 is connected to the other end of the voltage stabilizing module 10 and then grounded. The second filter module 40 includes a first capacitor C1 and a second capacitor C2 connected in parallel, and the first capacitor C1 and the second capacitor C2 are sequentially connected in parallel at two ends of the voltage stabilizing module 10.
Specifically, referring to fig. 1, in order to stabilize the voltage output to the voltage stabilizing module 10, a second filtering module 40 is provided, and the second filtering module 40 is connected to two ends of the voltage stabilizing module 10 to reduce noise and ripple of the voltage at the input end of the voltage stabilizing module 10; in an alternative embodiment of the present utility model, in order to improve the voltage stabilizing precision of the voltage stabilizing module 10 and reduce the ripple coefficient, the second filtering module 40 includes a first capacitor C1 and a second capacitor C2 connected in parallel, where the capacitance value of the first capacitor C1 is greater than the capacitance value of the second capacitor C2, the capacitance with a large capacitance value can be used to eliminate the low-frequency ripple signal, and the capacitance with a small capacitance value can be used to eliminate the high-frequency ripple signal, and the filtering effect is further improved by filtering the voltage stabilizing module 10 through two filtering capacitors.
Optionally, the delay starting module 10 includes a third capacitor C3, where an anode of the third capacitor C3 is connected to an emitter and an IC of the triode, and a cathode of the third capacitor C3 is connected to the ground GND.
Specifically, referring to fig. 1, when the triode Q is turned on and the current flows out through the emitter e, when the IC is powered, a part of the current is split by the third capacitor C3, so that a part of the current is used for charging the third capacitor C3 and a part of the current is used for starting the IC, so that the time for reaching the starting voltage of the IC is long, the effect of delaying the starting is realized, and meanwhile, the third capacitor C3 also plays a role of filtering the voltage provided to the IC by the circuit.
Optionally, referring to fig. 1, the circuit further comprises a status light 50; the input end of the status lamp 50 is connected with the emitter of the triode Q, and the output end of the status lamp 50 is connected with the IC.
Specifically, referring to fig. 1, the status lamp 50 is disposed between the IC and the output terminal of the circuit, and when the circuit is powered on, the status lamp 50 emits light, and when the circuit is turned off and fails, no current is output to the IC, and the status lamp 50 is turned off, thereby realizing the status alarm function of the circuit.
Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.
Claims (10)
1. The voltage stabilizing circuit for IC power supply is characterized by comprising a power supply, a voltage stabilizing module, a triode and a delay starting module;
One end of the voltage stabilizing module is connected with the power supply and the base electrode of the triode respectively, and the other end of the voltage stabilizing module is connected with the grounding end; the source electrode of the triode is connected with the power supply; the emitter of the triode is respectively connected with the IC and the input end of the delay starting module, and the output end of the delay starting module is connected with the grounding end; when the power supply supplies power to the IC, the current Ie of the triode emitter satisfies ie=i1+i2, where I1 is the current flowing to the IC, and I2 is the current flowing to the delay start module.
2. The voltage stabilizing circuit according to claim 1, wherein the voltage stabilizing module comprises a voltage stabilizing diode, a cathode of the voltage stabilizing diode is respectively connected with the power supply and a base electrode of the triode, and an anode of the voltage stabilizing diode is connected with the grounding terminal.
3. The voltage regulator circuit of claim 1, further comprising a status light; the input end of the status lamp is connected with the emitting electrode of the triode, and the output end of the status lamp is connected with the IC.
4. The voltage regulator circuit of claim 1, further comprising a first current limiting resistor having one end connected to the power supply and the other end connected to the base of the transistor to limit the base current of the transistor.
5. The voltage regulator circuit of claim 1, further comprising a second current limiting resistor having one end connected to the power supply and the other end connected to the source of the transistor to limit the current flowing from the source to the emitter of the transistor.
6. The voltage regulator circuit of claim 1, further comprising a first filter module; one end of the first filtering module is connected with the power supply, and the other end of the first filtering module is connected with the base electrode of the triode.
7. The voltage regulator circuit of claim 6, wherein the first filter module comprises a filter diode, a cathode of the filter diode is connected to the power supply as one end of the first filter module, and an anode of the filter diode is connected to the base of the triode as the other end of the first filter module.
8. The voltage stabilizing circuit according to claim 1, further comprising a second filter module, wherein one end of the second filter module is connected to one end of the power supply and one end of the voltage stabilizing module, respectively; the other end of the second filtering module is connected with the other end of the voltage stabilizing module and then grounded.
9. The voltage regulator circuit of claim 8, wherein the second filter module comprises a first capacitor and a second capacitor connected in parallel, the first capacitor and the second capacitor being connected in series across the voltage regulator module.
10. The voltage stabilizing circuit according to claim 1, wherein said delay start module comprises a third capacitor, an anode of said third capacitor is connected to an emitter of said triode and said IC, and a cathode of said third capacitor is connected to said ground terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202420799086.8U CN222050775U (en) | 2024-04-17 | 2024-04-17 | A voltage stabilizing circuit for IC power supply |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202420799086.8U CN222050775U (en) | 2024-04-17 | 2024-04-17 | A voltage stabilizing circuit for IC power supply |
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