CN214256133U - Chip voltage-stabilizing power supply circuit and chip - Google Patents
Chip voltage-stabilizing power supply circuit and chip Download PDFInfo
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- CN214256133U CN214256133U CN202120396841.4U CN202120396841U CN214256133U CN 214256133 U CN214256133 U CN 214256133U CN 202120396841 U CN202120396841 U CN 202120396841U CN 214256133 U CN214256133 U CN 214256133U
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Abstract
The utility model discloses a chip voltage-stabilizing power supply circuit, including power module, voltage stabilizing module and voltage dividing module, the incoming end of power module connects external power, and the outgoing end is connected with the first end of voltage stabilizing module, the second end of voltage stabilizing module with the first end of voltage dividing module is connected, the second end of voltage dividing module connects VCAP pin, the second end of voltage stabilizing module still connects VCC pin; the utility model discloses a chip steady voltage supply circuit, the effectual chip of solving is not enough in the work voltage or the power misconnection causes the chip can not work or the problem that the chip damaged.
Description
Technical Field
The utility model belongs to the chip field, more specifically the utility model relates to a chip steady voltage power supply circuit and have the chip that changes chip steady voltage power supply circuit that says so.
Background
With the development of science and technology, more and more chips are applied, the requirements of people on the chips are higher and higher, and the functions of the chips in the whole operation system are also improved. In the prior art, when a chip works, an operation system cannot work normally and even the chip is damaged due to various reasons, such as voltage fluctuation, power source misconnection and the like, so that unrecoverable loss is brought to the operation system, the system needs to be shut down for a long time for maintenance and even the chip needs to be replaced, and the cost is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a chip steady voltage supply circuit, the effectual chip of solving can not work or the problem that the chip damaged at the not enough or power misconnection of in-service voltage caused.
The utility model discloses a chip steady voltage supply circuit, including power module, voltage stabilizing module and voltage dividing module, power module's the end of advancing is connected external power, and the end of going out is connected with voltage stabilizing module's first end, voltage stabilizing module's second end with voltage dividing module's first end is connected, voltage dividing module's second end is connected VCAP pin, voltage stabilizing module's second end still connects the VCC pin;
the power module comprises a first filter capacitor, a second filter capacitor, a transient suppression diode, a first voltage stabilizing diode, a P-channel field effect transistor, an output anode and an output cathode, wherein the first end and the second end of the transient suppression diode are respectively connected with the anode and the cathode of an external power supply, the first end and the second end of the first filter capacitor are respectively connected with the first end and the second end of the transient suppression diode in parallel, the drain electrode of the P-channel field effect transistor is connected with the first end of the first filter capacitor, the source electrode of the P-channel field effect transistor is connected with the first end of the second filter capacitor, the grid electrode of the P-channel field effect transistor is connected with a current limiting resistor, the other end of the current limiting resistor is connected with the second end of the first filter capacitor and the second end of the second filter capacitor, the anode of the first voltage stabilizing diode is connected with the grid electrode of the P-channel field effect transistor, and the cathode of the first voltage stabilizing diode is connected with the first end of the second filter capacitor, and the output positive electrode and the output negative electrode are respectively connected with the first end and the second end of the second filter capacitor.
Preferably, the voltage stabilizing module comprises a second voltage stabilizing diode, the anode of the second voltage stabilizing diode is connected with the anode of the output of the power module, the cathode of the output of the power module is conducted with the VSS pin, and the cathode of the second voltage stabilizing diode is respectively connected with the first end of the voltage dividing module and the VCC pin.
Preferably, the voltage stabilizing module further includes a third filter capacitor, a first end of the third filter capacitor is connected to a negative electrode of the second voltage stabilizing diode, and a second end of the third filter capacitor is grounded.
Preferably, the voltage dividing module includes a voltage dividing resistor, one end of the voltage dividing resistor is connected to a negative electrode of a second voltage stabilizing diode in the voltage stabilizing module, and the other end of the voltage dividing resistor is connected to a VCAP pin.
Preferably, the voltage dividing module further includes a fourth filter capacitor and a third zener diode, two ends of the fourth filter capacitor are respectively connected to the ground terminal of the third filter capacitor and the terminal of the voltage dividing resistor connected to the VCAP pin, the third zener diode is connected in parallel with the fourth filter capacitor, and a negative electrode of the third zener diode is connected to the VCAP pin.
A chip comprises a chip unit, and the chip voltage-stabilizing power supply circuit is integrated in the chip unit.
The utility model discloses technical scheme's a chip steady voltage supply circuit's beneficial effect is: the power module effectively protects the chip, ensures that the electronic equipment is not damaged due to reverse connection of the power supply, and reduces economic loss possibly caused in the using process. The voltage stabilization in the circuit is realized through the voltage stabilizing module and the voltage dividing module, and the problem that the chip cannot work normally due to insufficient voltage is avoided.
Drawings
Fig. 1 is a schematic diagram of a chip voltage-stabilizing power supply circuit according to the technical scheme of the present invention;
FIG. 2 is a circuit diagram of a power module in the voltage-stabilizing power supply circuit of the present chip;
FIG. 3 is a circuit diagram of a voltage stabilizing module and a voltage dividing module in the chip voltage stabilizing power supply circuit;
among them are: the transient suppression circuit comprises a first filter capacitor C1, a second filter capacitor C2, a transient suppression diode D1, a first voltage stabilizing diode D2, a P-channel field effect transistor Q, a current limiting resistor R1, an output anode Vout +, an output cathode Vout-, a third filter capacitor C3, a fourth filter capacitor C4, a second voltage stabilizing diode D3, a third voltage stabilizing diode D4 and a voltage dividing resistor R2.
Detailed Description
In order to facilitate the understanding of the technical solutions of the present invention by those skilled in the art, the technical solutions of the present invention will now be further described with reference to the drawings attached to the specification.
As shown in fig. 1, the utility model provides a chip steady voltage supply circuit, including power module, voltage stabilizing module and voltage dividing module. The input end of the power supply module is connected with an external power supply, the output end of the power supply module is connected with the first end of the voltage stabilizing module, the second end of the voltage stabilizing module is connected with the first end of the voltage dividing module, the second end of the voltage dividing module is connected with the VCAP pin, and the second end of the voltage stabilizing module is further connected with the VCC pin. The power module ensures that the chip cannot be damaged when the power supply is reversely connected in the chip power connection process through the P-channel field effect tube. The voltage stabilizing module and the voltage dividing module are arranged to directly supply power to the VCAP pin from the outside, so that the normal power-on work of the chip can be ensured even if the voltage on the VCC pin is insufficient or in a critical state.
As shown in fig. 2, the power module includes a first filter capacitor C1, a second filter capacitor C2, a transient suppression diode D1, a first zener diode D2, a P-channel fet, an output anode Vout +, and an output cathode Vout-. The first end and the second end of the transient suppression diode D1 are respectively connected to the positive and negative electrodes of an external power supply, that is, the first end and the second end of the transient suppression diode D1 are respectively an access positive electrode V + and an access negative electrode V of the power module, the first end and the second end of the first filter capacitor C1 are respectively connected in parallel with the first end and the second end of the transient suppression diode D1, the drain D of the P-channel field effect transistor Q is connected with the first end of the first filter capacitor C1, the source S of the P-channel field effect transistor Q is connected with the first end of the second filter capacitor C2, the gate G of the P-channel field effect transistor Q is connected with a current-limiting resistor R1, and the other end of the current-limiting resistor R1 is connected with the second end of the first filter capacitor C1 and the second end of the second filter capacitor C2. The anode of the first voltage-stabilizing diode D2 is connected to the gate G of the P-channel fet Q, the cathode of the first voltage-stabilizing diode D2 is connected to the first terminal of the second filter capacitor C2, and the output anode Vout + and the output cathode Vout-are connected to the first terminal and the second terminal of the second filter capacitor C2, respectively.
In the technical scheme of the power supply module, when the power supply module is normally connected, the access anode V + and the access cathode V-of the power supply module are respectively connected with the anode and the cathode of the power supply, positive voltage passes through the P-channel field effect transistor Q, the voltage stabilizing diode D2 is reversely punctured, stable positive voltage is applied to the grid G of the field effect transistor, and the P-channel field effect transistor Q is conducted. At this time, the conduction internal resistance of the P-channel field effect transistor Q is small, the P-channel field effect transistor Q circuit is approximately short-circuited, and the power supply of the power supply module outputs normally, that is, the power supply module works normally to supply power to the chip normally.
When the polarity of the external power supply is reversely connected, namely the cathode of the external power supply is connected with the accessed anode V + of the power supply module, the anode of the power supply is connected with the accessed cathode V-of the power supply module. At the moment, a negative voltage is applied to the grid G of the P-channel field effect transistor Q, the field effect transistor is cut off, the power supply module cannot generate a current loop, the burning out of a circuit in a chip is effectively avoided, and possible economic loss is reduced.
As shown in fig. 3, the voltage regulation module includes a second zener diode D3, the anode of the second zener diode D3 is connected to the output anode Vout + of the power supply module, and the output cathode Vout-of the power supply module is conducted to the chip VSS pin. And the cathode of the second voltage stabilizing diode D3 is respectively connected with the first end of the voltage dividing module and the chip VCC pin. The second zener diode D3 plays a role in stabilizing voltage, so that the voltage provided by the power supply device to the chip through the power supply module is more stable. The voltage stabilizing module further comprises a third filter capacitor C3, wherein a first end of the third filter capacitor C3 is connected with a negative electrode of the second voltage stabilizing diode D3, and a second end of the third filter capacitor C3 is grounded. The third filter capacitor C3 may perform a filtering function to avoid interference. Simultaneously, this voltage stabilizing module can connect for chip VCC pin. The second zener diode D3 plays a role in voltage stabilization, so that the power supply device provides a stable voltage or current to the VCAP pin of the chip through the power supply module, thereby ensuring the normal operation of the chip.
As shown in fig. 3, the voltage dividing module includes a voltage dividing resistor R2, one end of the voltage dividing resistor R2 is connected to the negative electrode of the second zener diode D3 in the zener module, and the other end of the voltage dividing resistor R2 is connected to the VCAP pin. The voltage division module further comprises a fourth filter capacitor C4 and a third voltage stabilizing diode D4, and two ends of the fourth filter capacitor C4 are respectively connected with the grounding end of the third filter capacitor C3 and the VCAP pin end of the voltage division resistor R2. The third zener diode D4 is connected in parallel with the fourth filter capacitor C4, and the negative terminal of the third zener diode D4 is connected to the VCAP pin. The chip VCC pin and the chip VCAP pin are supplied with power through the outside, and the power supply of the VCC pin is unstable in time, and the VCAP pin can also provide stable voltage to ensure the power-on work of the chip. By adding the third zener diode D4, the VCAP pin can be further ensured to be powered more stably.
A chip comprises a chip unit, and the chip voltage-stabilizing power supply circuit is integrated in the chip unit.
The technical solution of the present invention is to provide an improved method for manufacturing a semiconductor device, which is characterized in that the method is not limited by the above-mentioned method, and the method is not substantially improved by the method and the device, or the method and the device are directly applied to other occasions without improvement, all within the protection scope of the present invention.
Claims (6)
1. A chip voltage-stabilizing power supply circuit is characterized by comprising a power supply module, a voltage-stabilizing module and a voltage dividing module, wherein the input end of the power supply module is connected with an external power supply, the output end of the power supply module is connected with the first end of the voltage-stabilizing module, the second end of the voltage-stabilizing module is connected with the first end of the voltage dividing module, the second end of the voltage dividing module is connected with a VCAP pin, and the second end of the voltage-stabilizing module is also connected with a VCC pin;
the power module comprises a first filter capacitor, a second filter capacitor, a transient suppression diode, a first voltage stabilizing diode, a P-channel field effect transistor, an output anode and an output cathode, wherein the first end and the second end of the transient suppression diode are respectively connected with the anode and the cathode of an external power supply, the first end and the second end of the first filter capacitor are respectively connected with the first end and the second end of the transient suppression diode in parallel, the drain electrode of the P-channel field effect transistor is connected with the first end of the first filter capacitor, the source electrode of the P-channel field effect transistor is connected with the first end of the second filter capacitor, the grid electrode of the P-channel field effect transistor is connected with a current limiting resistor, the other end of the current limiting resistor is connected with the second end of the first filter capacitor and the second end of the second filter capacitor, the anode of the first voltage stabilizing diode is connected with the grid electrode of the P-channel field effect transistor, and the cathode of the first voltage stabilizing diode is connected with the first end of the second filter capacitor, and the output positive electrode and the output negative electrode are respectively connected with the first end and the second end of the second filter capacitor.
2. The chip voltage-stabilizing power supply circuit according to claim 1, wherein the voltage-stabilizing module includes a second voltage-stabilizing diode, an anode of the second voltage-stabilizing diode is connected to an output anode of the power module, an output cathode of the power module is conducted to the VSS pin, and cathodes of the second voltage-stabilizing diode are respectively connected to the first terminal of the voltage-dividing module and the VCC pin.
3. The chip voltage-stabilizing power supply circuit according to claim 2, wherein the voltage-stabilizing module further comprises a third filter capacitor, a first end of the third filter capacitor is connected to a negative electrode of the second voltage-stabilizing diode, and a second end of the third filter capacitor is grounded.
4. The on-chip voltage-stabilizing power supply circuit according to claim 1, wherein the voltage-dividing module includes a voltage-dividing resistor, one end of the voltage-dividing resistor is connected to a negative electrode of a second voltage-stabilizing diode in the voltage-stabilizing module, and the other end of the voltage-dividing resistor is connected to a VCAP pin.
5. The chip voltage-stabilizing power supply circuit according to claim 4, wherein the voltage-dividing module further comprises a fourth filter capacitor and a third voltage-stabilizing diode, two ends of the fourth filter capacitor are respectively connected to the ground terminal of the third filter capacitor and the terminal of the voltage-dividing resistor connected to the VCAP pin, the third voltage-stabilizing diode is connected in parallel with the fourth filter capacitor, and the negative terminal of the third voltage-stabilizing diode is connected to the VCAP pin.
6. A chip, characterized in that the chip comprises a chip unit, and the chip voltage-stabilizing power supply circuit of any one of claims 1 to 5 is integrated in the chip unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120396841.4U CN214256133U (en) | 2021-02-23 | 2021-02-23 | Chip voltage-stabilizing power supply circuit and chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120396841.4U CN214256133U (en) | 2021-02-23 | 2021-02-23 | Chip voltage-stabilizing power supply circuit and chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214256133U true CN214256133U (en) | 2021-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120396841.4U Expired - Fee Related CN214256133U (en) | 2021-02-23 | 2021-02-23 | Chip voltage-stabilizing power supply circuit and chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214256133U (en) |
-
2021
- 2021-02-23 CN CN202120396841.4U patent/CN214256133U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210921 |
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| CF01 | Termination of patent right due to non-payment of annual fee |