CN101237229A - Detection control circuit and electronic device - Google Patents

Abstract

The embodiment of the present invention discloses a detection control circuit, which includes that the detection control circuit is connected to a series path formed by a power supply line and a propulsion line, and is used to control and shut down the series path when no current is detected on the series path; When it is detected that there is a current on the series path, the control is turned on the series path. The embodiment of the invention also discloses an electronic device. By adopting the invention, the space is saved, the output shutdown of the propulsion line is intelligentized, and the plug and play of the detection control circuit is realized, and it is simple and easy.

Description

Detection control circuit and electronic device

technical field

The invention relates to the communication field, in particular to a detection control circuit and an electronic device.

Background technique

At present, it is difficult for a boost circuit to realize output shutdown through an integrated circuit (Integrated Circuit, IC), and most of them realize output shutdown by adding a manual switch.

The prior art provides a turn-off circuit, which turns off the boost circuit through a hardware switch, but the turn-off line not only takes up a lot of space, but also the hardware switch used is not intelligent enough, and the turn-off circuit cannot be realized. Plug and play for disconnected wires.

Contents of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a detection control circuit and an electronic device, which can realize the connection between the detection control circuit and the series path formed by the power supply line and the propulsion line, and are used to detect the series path. When there is no current on the road, it controls to turn off the series path; when it detects that there is current on the series path, it controls to turn on the series path, thereby saving space and making the output shutdown of the propulsion line intelligent, plug and play .

In order to solve the above technical problems, the embodiment of the present invention proposes a detection control circuit, the detection control circuit is connected to the series path formed by the power supply line and the propulsion line, and is used to control the shutdown when no current is detected on the series path. The series path; when it is detected that there is a current on the series path, control to turn on the series path.

Correspondingly, the embodiment of the present invention also proposes an electronic device, which includes a series path composed of a power supply circuit and a propulsion circuit. The paths are connected, and are used to control to turn off the series path when no current is detected on the series path; and to control to turn on the series path when it is detected that there is current on the series path.

The embodiment of the present invention provides a detection control circuit and an electronic device, which can realize that the detection control circuit is connected with the series path formed by the power supply line and the push line, and is used to control when no current is detected on the series path. Turning off the series path; when detecting that there is a current on the series path, control the conduction of the series path, thereby saving space and making the output of the propulsion line shut off intelligently;

In addition, the plug and play of the detection control circuit can be realized.

Description of drawings

Fig. 1 is the schematic diagram of the first embodiment of the detection control circuit of the present invention;

2 is a schematic diagram of a second embodiment of the detection control circuit of the present invention;

3 is a schematic diagram of a third embodiment of the detection control circuit of the present invention;

4 is a schematic diagram of a fourth embodiment of the detection control circuit of the present invention;

5 is a schematic diagram of a fifth embodiment of the detection control circuit of the present invention;

6 is a schematic diagram of a sixth embodiment of the detection control circuit of the present invention;

7 is a schematic diagram of a seventh embodiment of the detection control circuit of the present invention;

Fig. 8 is a schematic diagram of the eighth embodiment of the detection control circuit of the present invention;

FIG. 9 is a schematic diagram of an electronic device according to an embodiment of the present invention.

Detailed ways

The embodiment of the present invention provides a detection control circuit and an electronic device, which can realize the connection between the detection control circuit and the series path formed by the power supply line and the propulsion line, and are used to control the shutdown when no current is detected on the series path. The series path is disconnected; when the current is detected on the series path, the series path is controlled to be turned on, thereby saving space, making the output shutdown of the propulsion circuit intelligent, and realizing the plug and play of the detection control circuit.

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Fig. 1 is the schematic diagram of the first embodiment of the detection control circuit of the present invention, in this Fig. 1 except battery pack (power supply line), boost circuit, output interface, other is the detection control circuit of the embodiment of the present invention (dotted line in the figure Shown in the box, the same below), wherein, the boost circuit is connected to the output interface, and one end of the output interface is an equipotential position. With reference to this figure, the detection control circuit mainly includes:

A first switch field effect transistor (V6) and a second switch field effect transistor (V8) with gate (G pole), source (S pole) and drain (D pole); power supply resistor (R31); pulse generation Circuit; a negative feedback amplifier circuit composed of an integrated operational amplifier circuit (N2B) with a non-inverting input terminal (5), an inverting input terminal (6), and an output terminal (7) and a proportional operational resistor (R17, R14); a detection resistor (R1); wherein, the V6 is a P-channel metal-oxide-semiconductor field effect transistor (P-Metal-Oxide-Semiconductor, PMOS), and the V8 is an N-channel metal-oxide-semiconductor field effect transistor (NMOS);

The relationship between the above components is as follows:

The G pole of the V6 is connected with the D pole of the V8; the D pole of the V6 is connected with the boost line input; the S pole of the V6 is connected with the battery pack output; the V6 R31 for supplying power to the G pole of the V6 is connected in parallel between the G pole and the output terminal of the battery pack;

The G pole of the V8 is respectively connected to the 7 of the N2B and the output end of the pulse generating circuit; the S pole of the V8 is grounded;

One end of R1 is grounded, and the other end is used as the equipotential potential;

R17 is connected in parallel between 6 and 7 of the N2B, 6 of the N2B is grounded through R14, and 5 of the N2B serves as the equipotential potential.

According to the above connected components and peripheral circuits, the working principle of the whole circuit is as follows:

The pulse generation circuit outputs a pulse at a certain time interval to drive V8 to turn on, and then V6 is also turned on to detect the output terminal of the boost line, that is, whether there is an output load connected to the output interface shown in Figure 1, that is, to detect whether the boost line is connected. has output;

(1) Since one end of the battery pack is grounded, one end of the output interface is used as the equipotential potential, and one end of R1 is grounded, the other end is used as the equipotential potential, and 5 of N2B is used as the equipotential potential, then, when from the battery There is no output current in the direction of group → boost line → output interface (no output load is connected to the output interface of the boost line, and the boost line has no output), then the voltage on R1 is low enough at this time, causing N2B to work in reverse, and the 7 outputs of N2B A low level, the low level makes V8 cut off, and then the G pole of V6 gets a high level, the high level makes V6 also cut off, at this time V6 has no output, and finally controls to turn off the battery pack, boost The series path formed by the line, thus turning off the output of the boost line;

In addition, in this case, N2B cannot output a continuous high level to drive the entire line to turn on and work normally. Only the continuous pulse of the pulse generating circuit makes the line enter the hiccup mode, and the power consumption of the entire line is very small at this time;

(2) When there is an output current from the direction of the battery pack → boost line → output interface (the output interface of the boost line is connected to an output load, and the boost line has output), the voltage on R1 is high enough at this time, causing N2B to be positive To work, 7 of N2B outputs a continuous high level, the continuous high level makes V8 conduction, and then the G pole of V6 gets a continuous low level, the continuous low level makes V6 also conduction, at this time V6 continues output, the series path composed of the battery pack and the boost circuit is normally output, the series path is continuously turned on, and the entire circuit works normally.

As an implementation, Fig. 2 is a schematic diagram of the second embodiment of the detection control circuit of the present invention. In order to reduce the workload on N2B, the voltage dividing resistors (R32, R18) as shown in Fig. 2 can be added, wherein:

One end of the R32 is connected to the D pole of the V6, and the other end of the R32 is connected to the G pole of the V8;

One end of the R18 is connected to the G pole of the V8, and the other end of the R18 is grounded.

As an implementation, Fig. 3 is a schematic diagram of the third embodiment of the detection control circuit of the present invention, as shown in Fig. 3, the 5 of the N2B can also be used as the equipotential potential through a current limiting resistor (R5), The 5 of the N2B can also be grounded through an external filter capacitor (C6), thereby effectively filtering out some useless signals.

As an implementation, FIG. 4 is a schematic diagram of a fourth embodiment of the detection control circuit of the present invention. As shown in FIG. 4 , the above-mentioned R32, R18, R5, and C6 can also be used at the same time.

Fig. 5 is a schematic diagram of the fifth embodiment of the detection control circuit of the present invention, except for the battery pack (power supply circuit), boost circuit and output interface in this Fig. 5, others are the detection control circuit of the embodiment of the present invention, wherein, the The boost line is connected to the output interface, and one end of the output interface is an equipotential potential. Referring to the figure, the detection control circuit mainly includes:

A first switching transistor (V6) and a second switching transistor (V8) with a base (B pole), an emitter (E pole), and a collector (C pole); a power supply resistor (R31); a pulse generating circuit; Negative feedback amplifying circuit composed of integrated operational amplifier circuit (N2B) of non-inverting input terminal (5), negative input terminal (6) and output terminal (7) and proportional operational resistors (R17, R14); detection resistor (R1); Wherein, the V6 is a PNP transistor, and the V8 is an NPN transistor;

The relationship between the above components is as follows:

The B pole of the V6 is connected to the C pole of the V8; the C pole of the V6 is connected to the boost line input end; the E pole of the V6 is connected to the output end of the battery pack; R31 for supplying power to the B pole of the V6 is connected in parallel between the B pole and the output terminal of the battery pack;

The B pole of the V8 is respectively connected to the 7 of the N2B and the output end of the pulse generating circuit; the E pole of the V8 is grounded;

One end of R1 is grounded, and the other end is used as the equipotential potential;

R17 is connected in parallel between 6 and 7 of the N2B, 6 of the N2B is grounded through R14, and 5 of the N2B serves as the equipotential potential.

According to the above connected components and peripheral circuits, the working principle of the whole circuit is as follows:

The pulse generation circuit outputs a pulse at a certain time interval to drive V8 to be turned on, and then V6 is also turned on to detect the output terminal of the boost line, that is, whether there is an output load connected to the output interface shown in Figure 5, that is, to detect whether the boost line is connected. has output;

(1) Since one end of the battery pack is grounded, one end of the output interface is used as the equipotential potential, and one end of R1 is grounded, the other end is used as the equipotential potential, and 5 of N2B is used as the equipotential potential, then, when from the battery There is no output current in the direction of group → boost line → output interface (no output load is connected to the output interface of the boost line, and the boost line has no output), then the voltage on R1 is low enough at this time, causing N2B to work in reverse, and the 7 outputs of N2B A low level, the low level makes V8 cut off, and then the B pole of V6 gets a high level, the high level makes V6 also cut off, at this time V6 has no output, and finally controls to turn off the battery pack, boost The series path formed by the line, thus turning off the output of the boost line;

In addition, in this case, N2B cannot output a continuous high level to drive the entire line to turn on and work normally. Only the continuous pulse of the pulse generating circuit makes the line enter the hiccup mode, and the power consumption of the entire line is very small at this time;

(2) When there is an output current from the direction of the battery pack → boost line → output interface (the output interface of the boost line is connected to an output load, and the boost line has output), the voltage on R1 is high enough at this time, causing N2B to be positive To work, 7 of N2B outputs a continuous high level, the continuous high level makes V8 conduction, and then the B pole of V6 gets a continuous low level, the continuous low level makes V6 also conduction, at this time V6 continues output, the series path composed of the battery pack and the boost circuit is normally output, the series path is continuously turned on, and the entire circuit works normally.

As an implementation, FIG. 6 is a schematic diagram of the sixth embodiment of the detection control circuit of the present invention. In order to reduce the workload on N2B, the voltage dividing resistors (R32, R18) as shown in FIG. 6 can be added, wherein:

One end of the R32 is connected to the C pole of the V6, and the other end of the R32 is connected to the B pole of the V8;

One end of the R18 is connected to the B pole of the V8, and the other end of the R18 is grounded.

As an implementation, FIG. 7 is a schematic diagram of a seventh embodiment of the detection control circuit of the present invention. As shown in FIG. 7, the 5 of the N2B can also be used as the equipotential potential through a current-limiting resistor (R5), The 5 of the N2B can also be grounded through an external filter capacitor (C6), thereby effectively filtering out some useless signals.

As an implementation, FIG. 8 is a schematic diagram of an eighth embodiment of the detection control circuit of the present invention. As shown in FIG. 8, the above R32, R18, R5, and C6 can also be used at the same time.

By implementing the detection control circuit of the present invention as shown in FIGS. 1 to 8 above, since the detection control circuit is connected in parallel with the series path formed by the battery pack and the boost circuit, when it is used to detect that there is no current on the series path, control Turning off the series path, thereby turning off the output of the boost line; when detecting that there is a current on the series path, control the conduction of the series path, thereby saving space, and turning off the output of the boost line intelligently It realizes the plug-and-play of the detection control circuit.

Correspondingly, the embodiment of the present invention also provides an electronic device as shown in FIG. The control circuit 93 is electrically connected to the series path, and when the detection control circuit 93 detects that there is no current on the series path, it controls to turn off the series path; When there is current, the series path is controlled to be turned on. Specifically, the detection and control circuit mentioned in the above-mentioned embodiments of the present invention can be applied to the detection and control circuit 93 in the electronic device, which will not be repeated here.

In a specific implementation, the electronic device may be a DC to DC (Direct Current to Direct Current, DC to DC) device, such as a backup power supply.

In addition, those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Radom Access Memory, RAM), etc.

The above are specific implementations of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered Be the protection scope of the present invention.

Claims (15)

1, a kind of detection control circuit is characterized in that, the series via that this detects control circuit and supply line, advance circuit to constitute links to each other, when being used to detect on the described series via no current, and the described series via of control shutoff; Detect when on the described series via electric current being arranged the described series via of control conducting.

2, detection control circuit as claimed in claim 1 is characterized in that, described propelling line output has an equipotential position, and this detection control circuit comprises:

Have grid, source electrode, the first switched field effect pipe of drain electrode, second switch field effect transistor; Supplying resistance; Pulse generating circuit; The negative feedback amplifier circuit of forming by integrated operational amplifier circuit with in-phase input end, reverse input end, output and scale operation resistance; Detect resistance;

The grid of the described first switched field effect pipe links to each other with the drain electrode of described second switch field effect transistor; The drain electrode of the described first switched field effect pipe links to each other with described propelling line input; The source electrode of the described first switched field effect pipe links to each other with described supply line output; In parallel between the grid of the described first switched field effect pipe and the described supply line output is the supplying resistance of described first switched field effect tube grid power supply;

The grid of described second switch field effect transistor links to each other with described integrated operational amplifier circuit output, described pulse generator output respectively; The source ground of described second switch field effect transistor;

Described detection resistance one end ground connection, the other end is as described equipotential position;

Be parallel with the described first scale operation resistance between the reverse input end of described integrated operational amplifier circuit and the output, the reverse input end of described integrated operational amplifier circuit is by the described second scale operation grounding through resistance, and the in-phase input end of described integrated operational amplifier circuit is as described equipotential position.

3, detection control circuit as claimed in claim 2 is characterized in that, this detection control circuit also comprises:

Second divider resistance in parallel between first divider resistance in parallel between the grid of the drain electrode of the described first switched field effect pipe and described second switch field effect transistor, the grid of described second switch field effect transistor and ground; And/or,

As described equipotential position, described integrated operational amplifier circuit in-phase input end is by a filter capacitor ground connection by a current-limiting resistance for described integrated operational amplifier circuit in-phase input end.

As claim 2 or 3 described detection control circuits, it is characterized in that 4, the described first switched field effect pipe is P channel metal-oxide-semiconductor field, described second switch field effect transistor is N channel metal-oxide-semiconductor field.

5, detection control circuit as claimed in claim 1 is characterized in that, described propelling line output has an equipotential position, and this detection control circuit comprises:

First switching transistor, second switch transistor with base stage, emitter, collector electrode; Supplying resistance; Pulse generating circuit; The negative feedback amplifier circuit of forming by integrated operational amplifier circuit with in-phase input end, reverse input end, output and scale operation resistance; Detect resistance;

The base stage of described first switching transistor links to each other with the transistorized collector electrode of described second switch; The collector electrode of described first switching transistor links to each other with described propelling line input; The emitter of described first switching transistor links to each other with described supply line output; In parallel between the base stage of described first switching transistor and the described supply line output is the supplying resistance of described first switching transistor base stage power supply;

The transistorized base stage of described second switch links to each other with described integrated operational amplifier circuit output, described pulse generator output respectively; The transistorized grounded emitter of described second switch;

Described detection resistance one end ground connection, the other end is as described equipotential position;

Be parallel with the described first scale operation resistance between the reverse input end of described integrated operational amplifier circuit and the output, the reverse input end of described integrated operational amplifier circuit is by the described second scale operation grounding through resistance, and the in-phase input end of described integrated operational amplifier circuit is as the equipotential position.

6, detection control circuit as claimed in claim 5 is characterized in that, this detection control circuit also comprises:

Second divider resistance in parallel between first divider resistance in parallel between the drain electrode of described first switching transistor and the transistorized grid of described second switch, the transistorized grid of described second switch and ground; And/or,

As described equipotential position, described integrated operational amplifier circuit in-phase input end is by a filter capacitor ground connection by a current-limiting resistance for described integrated operational amplifier circuit in-phase input end.

7, as claim 5 or 6 described detection control circuits, it is characterized in that described first switching transistor is the PNP transistor, described second switch transistor is the NPN transistor.

8, a kind of electronic installation, include supply line and the series via that advances circuit to form, it is characterized in that, this electronic equipment comprises that also one detects control circuit, this detects control circuit and links to each other with the series via that supply line, propelling circuit constitute, when being used to detect on the described series via no current, described series via is turn-offed in control; Detect when on the described series via electric current being arranged the described series via of control conducting.

9, electronic installation as claimed in claim 8 is characterized in that, described propelling line output has an equipotential position, and described detection control circuit comprises:

Have grid, source electrode, the first switched field effect pipe of drain electrode, second switch field effect transistor; Supplying resistance; Pulse generating circuit; The negative feedback amplifier circuit of forming by integrated operational amplifier circuit with in-phase input end, reverse input end, output and scale operation resistance; Detect resistance;

The grid of the described first switched field effect pipe links to each other with the drain electrode of described second switch field effect transistor; The drain electrode of the described first switched field effect pipe links to each other with described propelling line input; The source electrode of the described first switched field effect pipe links to each other with described supply line output; In parallel between the grid of the described first switched field effect pipe and the described supply line output is the supplying resistance of described first switched field effect tube grid power supply;

The grid of described second switch field effect transistor links to each other with described integrated operational amplifier circuit output, described pulse generator output respectively; The source ground of described second switch field effect transistor;

Described detection resistance one end ground connection, the other end is as described equipotential position;

Be parallel with the described first scale operation resistance between the reverse input end of described integrated operational amplifier circuit and the output, the reverse input end of described integrated operational amplifier circuit is by the described second scale operation grounding through resistance, and the in-phase input end of described integrated operational amplifier circuit is as described equipotential position.

10, electronic installation as claimed in claim 9 is characterized in that, this detection control circuit also comprises:

Second divider resistance in parallel between first divider resistance in parallel between the grid of the drain electrode of the described first switched field effect pipe and described second switch field effect transistor, the grid of described second switch field effect transistor and ground; And/or,

As described equipotential position, described integrated operational amplifier circuit in-phase input end is by a filter capacitor ground connection by a current-limiting resistance for described integrated operational amplifier circuit in-phase input end.

As claim 9 or 10 described electronic installations, it is characterized in that 11, the described first switched field effect pipe is P channel metal-oxide-semiconductor field, described second switch field effect transistor is N channel metal-oxide-semiconductor field.

12, electronic installation as claimed in claim 8 is characterized in that, described propelling line output has an equipotential position, and described detection control circuit comprises:

First switching transistor, second switch transistor with base stage, emitter, collector electrode; Supplying resistance; Pulse generating circuit; The negative feedback amplifier circuit of forming by integrated operational amplifier circuit with in-phase input end, reverse input end, output and scale operation resistance; Detect resistance;

The base stage of described first switching transistor links to each other with the transistorized collector electrode of described second switch; The collector electrode of described first switching transistor links to each other with described propelling line input; The emitter of described first switching transistor links to each other with described supply line output; In parallel between the base stage of described first switching transistor and the described supply line output is the supplying resistance of described first switching transistor base stage power supply;

The transistorized base stage of described second switch links to each other with described integrated operational amplifier circuit output, described pulse generator output respectively; The transistorized grounded emitter of described second switch;

Described detection resistance one end ground connection, the other end is as described equipotential position;

Be parallel with the described first scale operation resistance between the reverse input end of described integrated operational amplifier circuit and the output, the reverse input end of described integrated operational amplifier circuit is by the described second scale operation grounding through resistance, and the in-phase input end of described integrated operational amplifier circuit is as the equipotential position.

13, electronic installation as claimed in claim 12 is characterized in that, this detection control circuit also comprises:

Second divider resistance in parallel between first divider resistance in parallel between the drain electrode of described first switching transistor and the transistorized grid of described second switch, the transistorized grid of described second switch and ground; And/or,

As described equipotential position, described integrated operational amplifier circuit in-phase input end is by a filter capacitor ground connection by a current-limiting resistance for described integrated operational amplifier circuit in-phase input end.

As claim 12 or 13 described electronic installations, it is characterized in that 14, described first switching transistor is the PNP transistor, described second switch transistor is the NPN transistor.

As claim 8,9,10,12 or 13 described electronic installations, it is characterized in that 15, this electronic installation is a back-up source.

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