CN213338351U - Enabling control circuit - Google Patents
Enabling control circuit Download PDFInfo
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- CN213338351U CN213338351U CN202022418360.7U CN202022418360U CN213338351U CN 213338351 U CN213338351 U CN 213338351U CN 202022418360 U CN202022418360 U CN 202022418360U CN 213338351 U CN213338351 U CN 213338351U
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Abstract
The utility model relates to a signal input part control technical field discloses an enable control circuit, include: the chip comprises an enabling end, a triode, a first resistor, a first capacitor, a diode, a second resistor and a second capacitor, wherein the enabling end of the chip is connected with a collector electrode of the triode, one end of the resistor, one end of the capacitor and an anode of the diode, a base electrode of the triode is connected with a control signal, and an emitting electrode of the triode is grounded to GND; the other end of the first resistor is connected with a power supply VCC, the cathode of the diode is connected with one end of the second resistor and one end of the second capacitor, and the other ends of the first capacitor, the second resistor and the second capacitor are grounded GND. The utility model provides an enable end control function to the chip. The function that the enabling end can be slowly powered on and can be quickly turned off is met. The circuit design is simple and convenient, and the reliability is high.
Description
Technical Field
The utility model relates to a signal input part control technical field especially relates to an enable control circuit of input control signal.
Background
Enabling is a generic term in electronics for the control terminal that turns on or off the overall function of the integrated circuit. The enable terminal is an input terminal of a control signal, which is an input pin of the chip or an input port of the circuit, and only when the pin is activated, the chip can normally operate, and the high level is usually active. Almost all chips now have an enable terminal, and whether the chip is working or not is controlled by controlling the enable terminal, and the output change rate is consistent with the change rate of the power on the enable terminal. Based on this feature, the output timing of the circuit can be controlled by controlling the power-on timing of the enable terminal.
The output end of a general chip is generally connected with a capacitor with larger capacity as a voltage stabilizing filter, and if the output end is suddenly electrified, the output capacitor is charged, so that a large impact current exists. Therefore, often during the start-up process, the chip may fail due to the large rush current. Therefore, the output is always increased slowly during starting, so that the surge current can be limited and the chip can be protected. And under the emergency condition, the enable is immediately turned off, so that the chip stops outputting.
In order to solve the contradiction between slow power-up of the enable terminal and fast power-off of the enable terminal, an enable control circuit is needed to solve the contradiction.
Disclosure of Invention
The utility model aims to solve the technical problem that an enable control circuit is provided, circuit design is simple and convenient, and the reliability is high.
In order to realize the purpose of solving the technical problem, the utility model adopts the following technical scheme:
an enable control circuit comprising: the circuit comprises an enabling end of a chip, a triode 1, a first resistor 2, a first capacitor 3, a diode 4, a second resistor 5 and a second capacitor 6, wherein the enabling end of the chip is connected with a collector of the triode 1, one end of the resistor 2, one end of the capacitor 3 and an anode of the diode 4, a base of the triode 1 is connected with a control signal, and an emitter of the triode is grounded GND; the other end of the first resistor 2 is connected with a power supply VCC, the cathode of the diode 4 is connected with one end of the second resistor 5 and one end of the second capacitor 6, and the other ends of the first capacitor 3, the second resistor 5 and the second capacitor 6 are grounded GND.
By adopting the technical scheme, the utility model discloses following beneficial effect has:
the utility model relates to an enable control circuit, this circuit has solved the enable end control function to the chip. The function that the enabling end can be slowly powered on and can be quickly turned off is met. The circuit has the advantages of few used devices, simplicity, convenience, high reliability and wide application prospect in the aspect of enabling control.
Drawings
Fig. 1 is a schematic diagram of the connection of the present enable control circuit.
Detailed Description
This patent is further explained below with reference to the drawings.
As shown in fig. 1, an enable control circuit includes: the circuit comprises an enabling end of a chip, a triode 1, a first resistor 2, a first capacitor 3, a diode 4, a second resistor 5 and a second capacitor 6, wherein the enabling end of the chip is connected with a collector of the triode 1, one end of the resistor 2, one end of the capacitor 3 and an anode of the diode 4, a base of the triode 1 is connected with a control signal, and an emitter of the triode is grounded GND; the other end of the first resistor 2 is connected with a power supply VCC, the cathode of the diode 4 is connected with one end of the second resistor 5 and one end of the second capacitor 6, and the other ends of the first capacitor 3, the second resistor 5 and the second capacitor 6 are grounded GND. A control circuit, comprising: the enabling termination of chip is triode 1's collecting electrode, the one end of resistance 2, the one end of electric capacity 3, diode 4's positive pole, and control signal connects triode 1's base, triode's projecting pole ground connection GND, resistance 2's another termination power supply VCC, electric capacity 3's other end ground connection GND, diode 4's negative pole meets resistance 5's one end and electric capacity 6's one end, resistance 5's other end ground connection GND, electric capacity 6's other end ground connection GND.
A enables the control circuit working method, when the chip starts, the control signal of the base of the triode 1 is the low level, the power supply charges to the electric capacity 3 separately through the resistance 2, charge the electric capacity 6 through the diode 4 again, because the capacity of the electric capacity 6 is far greater than the capacity of the electric capacity 3, will charge the electric capacity 6 first, will charge the electric capacity 3 after the electric capacity 6 is full of, with the charging of the electric capacity 6, the voltage value of the enable pin rises gradually, the output rises gradually, the course has realized the slow opening of the enable end; when emergency shutdown is needed, a control signal of a base electrode of the triode 1 is changed into high level, a collector electrode and an emitter electrode of the triode 1 are conducted, namely, the capacitor 3 is discharged to the ground, because the capacity of the capacitor 3 is very small, and meanwhile, the voltage on the capacitor 6 cannot pass through the diode 4, the capacitor can only discharge through the resistor 5, the enabling end is rapidly pulled down, and output is turned off.
The circuit has the advantages of few used devices, simplicity, convenience, high reliability and wide application prospect in the aspect of enabling control.
Claims (1)
1. An enable control circuit, comprising: the method comprises the following steps: the chip comprises an enabling end, a triode, a first resistor, a first capacitor, a diode, a second resistor and a second capacitor, wherein the enabling end of the chip is connected with a collector electrode of the triode, one end of the resistor, one end of the capacitor and an anode of the diode, a base electrode of the triode is connected with a control signal, and an emitting electrode of the triode is grounded to GND; the other end of the first resistor is connected with a power supply VCC, the cathode of the diode is connected with one end of the second resistor and one end of the second capacitor, and the other ends of the first capacitor, the second resistor and the second capacitor are grounded GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022418360.7U CN213338351U (en) | 2020-10-27 | 2020-10-27 | Enabling control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022418360.7U CN213338351U (en) | 2020-10-27 | 2020-10-27 | Enabling control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213338351U true CN213338351U (en) | 2021-06-01 |
Family
ID=76074822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022418360.7U Active CN213338351U (en) | 2020-10-27 | 2020-10-27 | Enabling control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213338351U (en) |
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2020
- 2020-10-27 CN CN202022418360.7U patent/CN213338351U/en active Active
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Legal Events
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