ERP (Enterprise Resource Planning) circuit with low power consumption and plug discharge

Abstract

The utility model provides a low power consumption plug discharge ERP circuit, which comprises an alternating current input end, a main circuit and a working circuit, one end of the main circuit is connected with the alternating current input end, and the other end of the main circuit is connected with the working circuit; a control circuit is also arranged between the main circuit and the working circuit, the control circuit comprises a first switch, a first resistor, a second resistor and a second switch, the main circuit is also connected with a discharging circuit, the discharging circuit comprises a discharging chip and a discharging capacitor, two ends of the discharging capacitor are respectively connected with the discharging chip, and the discharging chip is connected with the first resistor. Standby energy loss is eliminated through cut-off of the first switch, ultra-low power consumption standby is achieved, rapid switching of grid voltage is achieved through the double-resistor design, it is ensured that the switch response is rapid, energy consumption is extremely low, low power consumption and high response performance are perfectly considered, the discharge chip dynamically controls a discharge path, the residual charge release time is remarkably shortened, and the service life of the discharge chip is prolonged. And rapid active discharge is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to switch power supply technical field, concretely relates to a kind of low-power plug-in discharge ERP circuit. BACKGROUND

[0002] In prior art, after the equipment is powered off, the energy storage element in main circuit still stores residual charge, which leads to the phenomenon of continuous discharge or current residue after plug-in, and such residual current not only can cause device malfunction or safety hazard, but also increases standby power consumption, which is difficult to meet the stringent demand of modern electronic equipment for low power consumption, and the existing discharge circuit mostly adopts passive discharge mode, which has slow discharge speed, low efficiency, and cannot dynamically adjust discharge logic according to input voltage state, which is easy to cause component overheating or shorten service life due to long time power-on, in addition, the static power consumption of traditional control circuit is high in standby state, and the response speed and reliability of switching logic are insufficient, which is difficult to balance the demand of low power consumption and fast power supply switching. SUMMARY

[0003] (1) Technical problem to be solved

[0004] The utility model provides a kind of low-power plug-in discharge ERP circuit, to solve the problems of high standby power consumption and slow discharge speed.

[0005] (2) Technical scheme

[0006] The utility model provides a kind of low-power plug-in discharge ERP circuit, including AC input end, main circuit and working circuit, the one end of main circuit is connected with the AC input end, the other end is connected with the working circuit, for the working circuit power supply;

[0007] Control circuit is further provided between the main circuit and the working circuit, and the control circuit includes a first switch, a first resistor, a second resistor and a second switch, the source electrode of the first switch is connected with the main circuit, the drain electrode is connected with the working circuit, the gate electrode is connected with the second resistor, the other end of the second resistor is connected with the second switch, the other end of the second switch is grounded, and the two ends of the first resistor are respectively connected with the source electrode and the gate electrode of the first switch.

[0008] The discharge circuit further includes a discharge chip and a discharge capacitor, and the two ends of the discharge capacitor are respectively connected with the discharge chip.

[0009] Further, the main circuit includes a first capacitor, and the first capacitor is connected in parallel with the discharge circuit.

[0010] Further, the model of the discharge chip is TEA1708.

[0011] Further, the discharge circuit further comprises a third resistor and a fourth resistor, two ends of the third resistor are connected with pin eight of the discharge chip and the positive pole of the main circuit respectively; two ends of the fourth resistor are connected with pin five of the discharge chip and the negative pole of the main circuit respectively.

[0012] Further, the zero-crossing power supply voltage threshold of the discharge chip is 20V.

[0013] Further, the discharge chip is built-in with a timer.

[0014] Further, the first switch is a P-type MOS tube.

[0015] Further, the resistance value of the first resistor is greater than that of the second resistor.

[0016] Further, the control circuit further comprises a second chip and an indicator lamp, two ends of the indicator lamp are connected with the second chip, and the input end of the indicator lamp is connected with the working circuit.

[0017] Further, the main circuit further comprises a third chip for providing stable voltage for the working circuit, and the model of the third chip is BP85226DFSOP7.

[0018] Compared with the prior art, the discharge chip dynamically controls the discharge path, significantly shortens the residual charge release time, realizes rapid active discharge, and each functional module is designed independently and cooperatively, which is convenient for expansion and adaptation to different application scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a flowchart of the utility model.

[0020] Figure 2 It is a principle block of the utility model. Figure One .

[0021] Figure 3 It is a timing diagram of the utility model.

[0022] Figure 4 It is a principle block of the utility model. Figure Two .

[0023] Figure 5 It is a principle block of the utility model. Figure Three .

[0024] Reference signs: 1 - AC input end, 2 - main circuit, 21 - discharge circuit, 3 - working circuit, 4 - control circuit. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0026] As Figures 1-5 shown, the utility model provides a kind of low-power plug-in discharge's ERP circuit, including AC input end 1, main circuit 2 and working circuit 3, one end of the main circuit 2 is connected with the AC input end 1, another end is connected with the working circuit 3, for the working circuit 3 power supply;Control circuit 4 is further provided between the main circuit 2 and the working circuit 3 for controlling whether the main circuit 2 can power supply the working circuit 3, the control circuit 4 includes first switch Q5, first resistance R40, second resistance R44 and second switch SW, the source electrode S of the first switch Q5 is connected with the main circuit 2, drain electrode D is connected with the working circuit 3, gate electrode G is connected with the second resistance R44, another end of the second resistance R44 is connected with the second switch SW, another end of the second switch SW is grounded, the two ends of the first resistance R40 are respectively connected with the source electrode S and gate electrode G of the first switch Q5;Wherein, main circuit 2 is also connected with discharge circuit 21, the discharge circuit 21 includes discharge chip IC1 and discharge capacitor C9, the two ends of the discharge capacitor C9 are respectively connected with the discharge chip IC1, now market solves standby power consumption problem of switching power supply circuit, reduces power consumption after circuit works, about 0.5-0.8W, and the present application can reduce power consumption to below 0.1W.

[0027] Specifically, in an example of the utility model, the main circuit 2 includes first capacitor CX2, the first capacitor CX2 is connected in parallel with the discharge circuit 21, for filtering common mode noise, improve equipment electromagnetic compatibility, and in the discharge circuit 21 connected in parallel with the first capacitor CX2, in addition to being provided with the discharge chip IC1, it also includes third resistance R3 and fourth resistance R4, the two ends of the third resistance R3 are respectively connected with the pin eight HV1 of the discharge chip IC1 and the positive pole of the main circuit 2;The two ends of the fourth resistance R4 are respectively connected with the pin five HV2 of the discharge chip IC1 and the negative pole of the main circuit 2, and the structure design of the third resistance R3 and fourth resistance R4 can limit discharge current, protect circuit component from large current damage, and the zero-crossing power voltage threshold of the discharge chip IC1 is 20V and has built-in timer, in addition to this, the discharge capacitor C9 is charged and discharged by being connected to the electric chip IC1.

[0028] Further, when the AC input terminal 1 is powered on, the 2-main circuit is powered on and the first capacitor CX2 starts charging, the discharge circuit 21 is also powered on, and when the voltage detection device in the discharge chip IC1 detects that the input voltage is greater than the zero-crossing power voltage threshold 20V, the pin eight HV1 and the pin five HV2 in the discharge chip IC1 are turned on, and the built-in timer starts to start, the discharge chip IC1 starts to charge the external discharge capacitor C9, and after the charging is completed, the pin eight HV1 and the pin five HV2 in the discharge chip IC1 are internally disconnected, causing the discharge circuit 21 to be powered off, for protecting the discharge chip IC1 from being damaged by long-time power-on; and when the AC input terminal 1 is powered off, at this time, due to the characteristics of the stored current of the first capacitor CX2, the first capacitor CX2 still has voltage and the main circuit 2 will still have some current conduction due to the discharge of the first capacitor CX2, and at this time, when the voltage detection device in the discharge chip IC1 detects that the input voltage is lower than the zero-crossing power voltage threshold 20V, the discharge capacitor C9 connected to the discharge chip IC1 starts to discharge the internal discharge chip IC1, and the pin eight HV1 and the pin five HV2 in the discharge chip IC1 are internally reconnected, the discharge circuit 21 is reactivated, and the discharge current of the first capacitor CX2 forms a discharge loop in the third resistor R3, the fourth resistor R4 and the discharge chip IC1 through the discharge circuit 21, so that the current of the first capacitor CX2 is released and consumed, and the current in the main circuit 2 cannot pass to the subsequent circuit, avoiding the influence of the residual current on the working device after power-off.

[0029] Further, the discharge capacitor C9 serves as an external energy storage element of the timer, which on the one hand accurately controls the logic response time of the discharge chip IC1 in the charging and discharging process to avoid misoperation, and on the other hand slowly charges during standby to ensure that the discharge action is triggered only after the AC input terminal 1 is completely disconnected, preventing misdischarge, and the structure design of the third resistor R3 and the fourth resistor R4 can limit the discharge current of the first capacitor CX2 to a safe range (<0.5A) to avoid surge current damage to the discharge chip IC1 or arc initiation, and the use of two resistors can also disperse more heat. In addition, in the discharge circuit 21, if the discharge chip IC1 fails, the first capacitor CX2 capacitor can still slowly discharge through the third resistor R3 and the fourth resistor R4, providing double protection.

[0030] Specifically, in an example of the utility model, in the control circuit 4, the first switch Q5 is P type MOS tube, the characteristic of this type MOS tube is, when the voltage of the gate G is lower than the voltage of the source S, the source S and the drain D are conducted, when the voltage of the gate G is higher than the voltage of the source S, the source S and the drain D are not conducted, and because the source S of the first switch Q5 is connected to the main circuit 2, and the drain D is connected to the working circuit, the control circuit 4 controls whether the main circuit 2 can supply power to the working circuit 3 mainly by controlling the gate G voltage of the first switch Q5, and the voltage of the gate G is specifically controlled by the first resistance R40, the second resistance R44 and the second switch SW connected to the first switch Q5, wherein the second switch SW has two forms, ON and OFF.

[0031] Further, in standby state, that is, when the AC input end 1 is plugged in and the second switch SW form is OFF, the second switch SW disconnects the ground path of the second resistance R44, and the first resistance R40 pulls the gate G of the first switch Q5 to + 15V as high level, at this time, the gate G voltage is higher than the voltage of the source S, because the threshold voltage of the first switch Q5 is 2V, the gate G voltage is much higher than the threshold, the first switch Q5 is in complete cut-off state and not conducted, that is, the main circuit 2 does not supply power to the working circuit 3, so that the working circuit 3 is in low power consumption state in standby state, and in the state of starting, when the switch SW form is ON, the second resistance R44 is grounded, forming the gate G path to ground, and its voltage is forced to pull down to 0V as low level, at this time, the gate G voltage is lower than the voltage of the source S, the first switch Q5 is conducted, and the main circuit 2 starts to supply power to the working circuit 3.

[0032] Further, the resistance value of the first resistance R40 is 47K, which only generates a small current in standby state, significantly reducing static power consumption, and the resistance value of the second resistance R44 is 47R, which provides a low impedance path in the state of starting, ensuring that the gate voltage G is quickly pulled down to 0V, reducing the delay of the first switch Q5 conduction.

[0033] Specifically, in an example of the utility model, the control circuit 4 further comprises a second chip IC2 and an indicator lamp LED7, both ends of the indicator lamp LED7 are connected with the second chip IC2, and the input end of the indicator lamp LED7 is connected with the working circuit 3.

[0034] Specifically, in an example of the utility model, the main circuit 2 further includes a third chip U3 for providing stable voltage for the working circuit 3, and helping to improve energy utilization efficiency, reduce energy waste, and effectively reduce audio noise generated during system operation, improve the use experience of the equipment, and the model of the third chip U3 is BP85226DFSOP7.

[0035] The working principle of the utility model is described in detail as follows:

[0036] The power supply stage, after the AC input end 1 is connected to the power supply, the main circuit 2 supplies power for the working circuit 3, and the first capacitor CX2 charges and stores energy, and the discharge chip IC2 detects the input voltage in real time, when the voltage exceeds 20V threshold, the internal pin is turned on and charges the discharge capacitor C9, after charging, the discharge chip IC2 automatically cuts off the circuit to avoid overload; standby control, when the second switch SW is disconnected, the control circuit 4 pulls up the gate voltage G of the first switch Q5 through the first resistor R40, so that it is cut off, and the main circuit stops supplying power to the working circuit, only maintaining microampere level static current; discharge after power off: after the AC input end 1 is disconnected, the residual current stored in the first capacitor CX2 triggers the voltage detection of the discharge chip IC2, when the voltage is lower than 20V, the discharge capacitor C9 reversely discharges, activates the loop composed of the third resistor R3, the fourth resistor R4 and the discharge chip IC2, quickly consumes the residual charge, and ensures that the main circuit is completely powered off; dynamic response, when the second switch SW of the control circuit 4 is closed, the second resistor R44 pulls down the gate voltage G to 0V, the first switch Q5 is turned on, the main circuit resumes power supply, and the double resistor design greatly shortens the conduction delay, and the voltage division structure reduces power consumption.

[0037] The utility model discloses an innovation point lies in: through the cut-off of the first switch, eliminate standby energy loss, realize very low power consumption standby, through the double resistor design, realize the quick switching of the gate voltage, ensure that the switch response is quick and energy consumption is very low, perfect low power consumption and high response performance, the discharge chip dynamic control discharging path, significantly shorten the residual charge release time, realize the quick initiative discharge, and each functional module design is independent and collaborative, and it is convenient to extend and adapt to different application scenarios.

[0038] In addition, it should be understood that, although the present specification is described according to the embodiments, not every embodiment only contains an independent technical scheme, the description mode of the specification is only for the sake of clarity, the person skilled in the art should take the specification as a whole, and the technical scheme in each example can also be combined appropriately to form other implementations that can be understood by the person skilled in the art.

[0039] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than by the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. An ERP circuit for low power plug-in discharge, characterized in that, The utility model relates to a kind of AC-DC power supply, including AC input (1), main circuit (2) and working circuit (3), one end of the main circuit (2) is connected with the AC input (1), the other end is connected with the working circuit (3), for the working circuit (3) power supply; Control circuit (4) is further provided between the main circuit (2) and the working circuit (3), the control circuit (4) includes first switch (Q5), first resistance (R40), second resistance (R44) and second switch (SW), the source (S) of the first switch (Q5) is connected with the main circuit (2), the drain (D) is connected with the working circuit (3), the gate (G) is connected with the second resistance (R44), the other end of the second resistance (R44) is connected with the second switch (SW), the other end of the second switch (SW) is grounded, the two ends of the first resistance (R40) are connected with the source (S) and the gate (G) of the first switch (Q5) respectively; Wherein, discharge circuit (21) is further connected on the main circuit (2), and the discharge circuit (21) includes discharge chip (IC1) and discharge capacitor (C9), and the two ends of the discharge capacitor (C9) are connected with the discharge chip (IC1) respectively.

2. The low power plug pull off discharge ERP circuit according to claim 1, wherein, The main circuit (2) includes first capacitor (CX2), and the first capacitor (CX2) is connected with the discharge circuit (21) in parallel.

3. The low power plug pull off discharge ERP circuit according to claim 2, wherein, The model of the discharge chip (IC1) is TEA1708.

4. The low power plug pull off discharge ERP circuit according to claim 3, wherein, The discharge circuit (21) further includes third resistance (R3) and fourth resistance (R4), and the two ends of the third resistance (R3) are connected with the pin eight (HV1) of the discharge chip (IC1) and the positive pole of the main circuit (2) respectively;The two ends of the fourth resistance (R4) are connected with the pin five (HV2) of the discharge chip (IC1) and the negative pole of the main circuit (2) respectively.

5. The low power plug-in discharge ERP circuit of claim 3, wherein, The zero-crossing power voltage threshold of the discharge chip (IC1) is 20V.

6. The low power plug pull off discharge ERP circuit according to claim 3, wherein, The discharge chip (IC1) is built-in with timer.

7. The low power plug el ectrically relayed (ERP) circuit of claim 1, wherein, The first switch (Q5) is P type MOS tube.

8. The low power plug pull off discharge ERP circuit according to claim 7, wherein, The resistance value of the first resistance (R40) is greater than the resistance value of the second resistance (R44).

9. The low power plug el ectrically relayed pull (ERP) circuit of claim 1, wherein, The control circuit (4) further includes second chip (IC2) and indicator light (LED7), and the two ends of the indicator light (LED7) are connected with the second chip (IC2), and the input end of the indicator light (LED7) is connected with the working circuit (3).

10. The low power plug el ectrically relayed pull (ERP) circuit of claim 1, wherein, The main circuit (2) further includes third chip (U3), for providing stable voltage for the working circuit (3), and the model of the third chip (U3) is BP85226DFSOP7.

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