CN203466727U - Miniwatt voltage stabilizing source circuit - Google Patents
Miniwatt voltage stabilizing source circuit Download PDFInfo
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- CN203466727U CN203466727U CN201320494478.5U CN201320494478U CN203466727U CN 203466727 U CN203466727 U CN 203466727U CN 201320494478 U CN201320494478 U CN 201320494478U CN 203466727 U CN203466727 U CN 203466727U
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- circuit
- triode
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- voltage stabilizing
- diode
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Abstract
The utility model discloses a miniwatt voltage stabilizing source circuit which comprises a reference circuit, a filter circuit, a drive circuit and a load circuit. The reference circuit is connected with the filter circuit and the drive circuit, and the output end of the drive circuit is connected with the load circuit. The miniwatt voltage stabilizing source circuit utilizes the voltage stabilization function of a Zener diode to determine the voltage of the base electrode of a triode, so that the voltage of the emitter electrode of the triode is stabilized; and the triode can amplify the current, so that the carrying capacity of the triode is improved.
Description
Technical field
The utility model relates to a kind of source of stable pressure circuit for chip power supply, in particular a kind of small-power source of stable pressure circuit.
Background technology
In recent years, Switching Power Supply is widely used, and traditional required components and parts of small-power source of stable pressure are more, causes reliability to reduce, and has increased cost; The general power demand of chip power supply is less, can cause power dissipation.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of small-power source of stable pressure circuit is provided, and reduces components and parts used, makes power obtain maximum using, improves precision.
The utility model is achieved through the following technical solutions, and the utility model comprises reference circuit, filter circuit, drive circuit and load circuit; Described reference circuit is connected with filter circuit, and reference circuit is connected with drive circuit, and the output of drive circuit is connected with load circuit.
Described reference circuit comprises resistance R 1, diode D1 and voltage stabilizing didoe D2, one termination input voltage+Vin of described resistance R 1, the other end is connected with the anode of diode D1, and the negative electrode of diode D1 is connected with the negative electrode of voltage stabilizing didoe D2, the plus earth of voltage stabilizing didoe D2.
Described filter circuit comprises capacitor C 1, and one end of described capacitor C 1 is connected with the anode of diode D1, other end ground connection.
Described drive circuit comprises triode Q1 and triode Q2, and the collector electrode of described triode Q1 meets input voltage+Vin, and base stage is connected with the anode of diode D1, and emitter is connected with the base stage of triode Q2; The collector electrode of triode Q2 meets input voltage+Vin, and emitter connects load circuit.
Described load circuit is load RL, the emitter of a termination triode Q2 of load RL, other end ground connection.
Because power demand is less, and the required drive current of transistor base is less, therefore optional low power voltage stabilizing didoe; The general required supply current of chip is 50mA～100mA, therefore the NPN type triode that selected triode is middle low power; The base voltage of triode is controlled by voltage stabilizing didoe, when input voltage is greater than the nominal value of voltage stabilizing didoe, the base voltage of triode stabilizes to the nominal value of voltage stabilizing didoe, and the emitter voltage of triode also stabilizes to the nominal value of voltage stabilizing didoe, deducts the voltage drop value between this transistor base and emitter.
The utility model has the following advantages compared to existing technology: the utility model utilizes the pressure stabilization function of voltage stabilizing didoe to determine the base voltage of triode, thereby the emitter voltage of triode is stablized, and because triode has the effect of amplified current, its load capacity is strengthened.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below embodiment of the present utility model is elaborated; the present embodiment is implemented take technical solutions of the utility model under prerequisite; provided detailed execution mode and concrete operating process, but protection range of the present utility model is not limited to following embodiment.
As shown in Figure 1, the present embodiment comprises reference circuit, filter circuit, drive circuit and load circuit; Described reference circuit is connected with filter circuit, and reference circuit is connected with drive circuit, and the output of drive circuit is connected with load circuit.Described reference circuit comprises resistance R 1, diode D1 and voltage stabilizing didoe D2, one termination input voltage+Vin of described resistance R 1, the other end is connected with the anode of diode D1, and the negative electrode of diode D1 is connected with the negative electrode of voltage stabilizing didoe D2, the plus earth of voltage stabilizing didoe D2.
Described filter circuit comprises capacitor C 1, and one end of described capacitor C 1 is connected with the anode of diode D1, other end ground connection.
Described drive circuit comprises triode Q1 and triode Q2, and the collector electrode of described triode Q1 meets input voltage+Vin, and base stage is connected with the anode of diode D1, and emitter is connected with the base stage of triode Q2; The collector electrode of triode Q2 meets input voltage+Vin, and emitter connects load circuit.
Described load circuit is load RL, the emitter of a termination triode Q2 of load RL, other end ground connection.
The present embodiment operation principle:
The reference circuit that resistance R 1, diode D1 and voltage stabilizing didoe D2 form has determined the emitter voltage of triode Q2, and the emitter voltage of triode Q2 is that the voltage drop value that the nominal value of voltage stabilizing didoe D2 and the pressure drop sum of diode D1 deduct between triode Q1 base stage and emitter deducts the voltage drop value between triode Q1 base stage and emitter again.Triode has amplification, and the amplification by two-stage triode is improved the load capacity of whole circuit.
Claims (1)
1. a small-power source of stable pressure circuit, is characterized in that, comprises reference circuit, filter circuit, drive circuit and load circuit; Described reference circuit is connected with filter circuit, and reference circuit is connected with drive circuit, and the output of drive circuit is connected with load circuit; Described reference circuit comprises resistance R 1, diode D1 and voltage stabilizing didoe D2, one termination input voltage+Vin of described resistance R 1, the other end is connected with the anode of diode D1, and the negative electrode of diode D1 is connected with the negative electrode of voltage stabilizing didoe D2, the plus earth of voltage stabilizing didoe D2; Described filter circuit comprises capacitor C 1, and one end of described capacitor C 1 is connected with the anode of diode D1, other end ground connection; Described drive circuit comprises triode Q1 and triode Q2, and the collector electrode of described triode Q1 meets input voltage+Vin, and base stage is connected with the anode of diode D1, and emitter is connected with the base stage of triode Q2; The collector electrode of triode Q2 meets input voltage+Vin, and emitter connects load circuit; Described load circuit is load RL, the emitter of a termination triode Q2 of load RL, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320494478.5U CN203466727U (en) | 2013-08-14 | 2013-08-14 | Miniwatt voltage stabilizing source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320494478.5U CN203466727U (en) | 2013-08-14 | 2013-08-14 | Miniwatt voltage stabilizing source circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203466727U true CN203466727U (en) | 2014-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320494478.5U Expired - Fee Related CN203466727U (en) | 2013-08-14 | 2013-08-14 | Miniwatt voltage stabilizing source circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203466727U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105539319A (en) * | 2015-12-31 | 2016-05-04 | 延锋伟世通电子科技（上海）有限公司 | Automatic hardwired control source selection circuit |
-
2013
- 2013-08-14 CN CN201320494478.5U patent/CN203466727U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105539319A (en) * | 2015-12-31 | 2016-05-04 | 延锋伟世通电子科技（上海）有限公司 | Automatic hardwired control source selection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20210814 |
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| CF01 | Termination of patent right due to non-payment of annual fee |