CN210490745U

CN210490745U - Resistance-capacitance voltage reduction circuit

Info

Publication number: CN210490745U
Application number: CN201922005384.7U
Authority: CN
Inventors: 王强; 李久刚
Original assignee: Guangdong Hantang Intelligent Control Co Ltd
Current assignee: Guangdong Hantang Intelligent Control Co Ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-05-08
Anticipated expiration: 2029-11-19

Abstract

The utility model discloses a resistance-capacitance step-down circuit, ACL1 and ACN1 including the thin copper foil of input, parallelly connected piezo-resistor ZNR1 and electric capacity C9 on ACL1 and ACN1, electric capacity C9's one end is parallelly connected electric capacity C5 and resistance R19 still, electric capacity C5 and resistance R19's the other termination is at diode D2 anodal and diode D3 negative pole, diode D2's negative pole connects 12V and PNP triode Q1's projecting pole. This resistance-capacitance voltage reduction circuit, RC voltage reduction module is constituteed to electric capacity C5 and resistance R19, zener diode Z3 constitutes voltage reduction module, NP triode Q1 drive relay RLY1, level transition is realized with triode Q2 to PNP triode Q1's drive, resistance R26 is the load, super capacitor EC3 and electric capacity C3 constitute filtering module, realize that relay RLY1 drives and the latter stage power supply concatenates, save electric current, reduce the capacity of resistance-capacitance electric capacity, reduce zener diode Z3's temperature rise.

Description

Resistance-capacitance voltage reduction circuit

Technical Field

The utility model relates to a resistance-capacitance step-down technical field specifically is a resistance-capacitance step-down circuit.

Background

The resistance-capacitance voltage reduction circuit is one of common power supply modes, has the advantages of simple structure, low circuit cost and the like, and is generally applied to power supply circuits with low power consumption, such as small household appliances, LED lamps and the like, because the resistance-capacitance voltage reduction circuit has the power supply characteristic similar to constant current.

The commonly used resistance-capacitance voltage reduction circuit is limited by RC in parallel, when the alternating current is at the peak value at the moment of starting up, the voltage is generally higher than 300 volts, so that the current borne by the voltage-stabilizing tube at the moment of starting up is far larger than the current borne by the voltage-stabilizing tube, and the circuit is easily damaged by high temperature caused by high voltage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a resistance-capacitance voltage reduction circuit has and realizes that relay RLY1 drive concatenates with the back level power supply, saves the electric current, reduces the capacity of resistance-capacitance electric capacity, reduces the advantage of zener diode Z3's temperature rise, has solved the problem among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme: a resistance-capacitance voltage reduction circuit comprises ACL1 and ACN1 which input thin copper foils, wherein a piezoresistor ZNR1 and a capacitor C9 are connected in parallel to the ACL1 and the ACN1, one end of the capacitor C9 is also connected in parallel with a capacitor C5 and a resistor R19, the other ends of the capacitor C5 and the resistor R19 are connected with the anode of a diode D2 and the cathode of the diode D3, the cathode of the diode D2 is connected with 12V and the emitter of a PNP triode Q1, and the collector of the PNP triode Q1 is respectively connected with the parallel connection ports of a zener diode Z2, a capacitor C8, a super capacitor EC2, a relay RLY1, a zener diode Z3, a capacitor C2, a super capacitor EC3, a capacitor C3, a resistor R26 and;

the base electrode and the emitter electrode of the PNP triode Q1 are connected with a resistor R20 and the cathode electrode of a diode D4 in parallel, the base electrode of the PNP triode Q1 is further connected with a resistor R21 which is connected with a resistor R20 in parallel and is connected with the collector electrode of the PNP triode Q2, the base electrode series resistor R23 of the PNP triode Q2 is connected with VCC, the emitter electrode of the PNP triode Q2 is connected with the parallel connection port of the resistor R24 and the resistor R22, the grounded resistor R22 is further connected with a series capacitor C6 and is connected with the collector electrode of the PNP triode Q2, and the capacitor C6 is;

the anode of the diode D3 and the anode of the diode D4 are connected in parallel with a diode D5, one end of the diode D5 is connected in parallel with a capacitor C9, and the other end of the diode D5 is connected with a parallel connection port at the other end of the voltage stabilizing diode Z3, the capacitor C2, the super capacitor EC3, the capacitor C3 and the resistor R26;

the other end of the voltage-stabilizing diode Z2 is connected in series with a voltage-stabilizing diode Z1 and a capacitor, and the other ends of the C8 super capacitor EC2, the relay RLY1 and the diode D1 are connected in parallel, and one end of the diode D1 is connected to 12V.

Preferably, the piezoresistor ZNR1 is 10D471K, and plays a role in surge protection.

Preferably, the ACL1 and the ACN1 are connected to a power supply terminal, the capacitor C5 and the resistor R19 form an RC voltage reduction module, the zener diode Z3 forms a zener module, and the resistor R26 forms a filtering module for a load, the super capacitor EC3 and the capacitor C3.

Preferably, the PNP transistor Q1 drives the relay RLY1, and the PNP transistor Q1 is driven by the transistor Q2 to realize level conversion.

Compared with the prior art, the beneficial effects of the utility model are as follows:

according to the resistance-capacitance voltage reduction circuit, an ACL1 and an ACN1 are connected with power supply ends, a capacitor C5 and a resistor R19 form an RC voltage reduction module, a voltage stabilizing module is formed by a voltage stabilizing diode Z3, an NP triode Q1 drives a relay RLY1, level conversion of a PNP triode Q1 is realized by a triode Q2, a resistor R26 is a load, a super capacitor EC3 and a capacitor C3 form a filtering module, the circuit realizes that the relay RLY1 is driven to be connected with a rear-stage power supply in series, current is saved, the capacity of a resistance-capacitance capacitor is reduced, the temperature rise of a voltage stabilizing diode Z3 is reduced, the circuit is connected with two power supplies in series, and a direct-current. Meanwhile, the two power supplies are connected in series to save current compared with the parallel connection, so that the capacitance value is reduced, and the characteristic of a double negative power supply resistance-capacitance voltage reduction circuit is achieved.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, a resistor-capacitor voltage reducing circuit includes ACL1 and ACN1 which input thin copper foil, a varistor ZNR1 and a capacitor C9 are connected in parallel to ACL1 and ACN1, the varistor ZNR1 is 10D471K, which plays a role of surge protection, one end of the capacitor C9 is also connected in parallel to a capacitor C5 and a resistor R19, the other ends of the capacitor C5 and the resistor R19 are connected to the anode of a diode D2 and the cathode of a diode D3, the cathode of the diode D2 is connected to 12V and the emitter of a PNP triode Q1, and the collector of the PNP triode Q1 is connected to parallel ports of a zener diode Z2, a capacitor C8, a super capacitor EC2, a relay RLY1, a zener diode Z3, a capacitor C2, a super capacitor EC3, a capacitor C3, a resistor R26 and VCC;

a resistor R20 and a cathode of a diode D4 are connected in parallel on the base and the emitter of the PNP triode Q1, the base of the PNP triode Q1 is also connected with a resistor R21 which is connected in parallel with a resistor R20 and is connected with the collector of the PNP triode Q2, a base series resistor R23 of the PNP triode Q2 is connected with VCC, the emitter of the PNP triode Q2 is connected with the parallel connection port of a resistor R24 and a resistor R22, a grounded resistor R22 is also connected with a series capacitor C6 and is connected with the collector of the PNP triode Q2, and a capacitor C6 is connected in parallel with a resistor R;

the anode of the diode D3 and the anode of the diode D4 are connected in parallel with a diode D5, one end of the diode D5 is connected in parallel with a capacitor C9, and the other end of the diode D5 is connected with a parallel connection port at the other end of the zener diode Z3, the capacitor C2, the super capacitor EC3, the capacitor C3 and the resistor R26; the other end of the voltage-stabilizing diode Z2 is connected in series with a voltage-stabilizing diode Z1 and a parallel port of the capacitor, the other end of the C8 super capacitor EC2, the relay RLY1 and the other end of the diode D1, one end of the diode D1 is connected to 12V, and the diode D2, the diode D3, the diode D4 and the diode D5 form full-wave rectification.

ACL1 and ACN1 connect the power end, electric capacity C5 and resistance R19 make up RC voltage dropping module, zener diode Z3 makes up the voltage regulation module, triode Q1 and Q2 connect in series, form the H-type circuit, used for driving the function, NP triode Q1 drives relay RLY1, the drive of PNP triode Q1 should realize the level switch with triode Q2, resistance R26 is the load, super capacitor EC3 and capacitance C3 make up the filter module, this circuit realizes that the drive of relay RLY1 connects in series with the latter stage power supply, save the electric current, reduce the capacity of the capacitance-resistance, reduce the temperature rise of zener diode Z3, this circuit connects two power supplies in series, omit the direct-flow voltage dropping circuit. Meanwhile, the two power supplies are connected in series to save current compared with the parallel connection, so that the capacitance value is reduced, and the characteristic of a double negative power supply resistance-capacitance voltage reduction circuit is achieved.

In summary, the following steps: according to the resistance-capacitance voltage reduction circuit, an ACL1 and an ACN1 are connected with power supply ends, a capacitor C5 and a resistor R19 form an RC voltage reduction module, a voltage stabilizing module is formed by a voltage stabilizing diode Z3, an NP triode Q1 drives a relay RLY1, level conversion of a PNP triode Q1 is realized by a triode Q2, a resistor R26 is a load, a super capacitor EC3 and a capacitor C3 form a filtering module, the circuit realizes that the relay RLY1 is driven to be connected with a rear-stage power supply in series, current is saved, the capacity of a resistance-capacitance capacitor is reduced, the temperature rise of a voltage stabilizing diode Z3 is reduced, the circuit is connected with two power supplies in series, and a direct-current. Meanwhile, the two power supplies are connected in series to save current compared with the parallel connection, so that the capacitance value is reduced, and the characteristic of a double negative power supply resistance-capacitance voltage reduction circuit is achieved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A resistance-capacitance voltage reduction circuit comprises ACL1 and ACN1 which input thin copper foils, and is characterized in that: a voltage dependent resistor ZNR1 and a capacitor C9 are connected in parallel to the ACL1 and the ACN1, one end of a capacitor C9 is also connected in parallel with a capacitor C5 and a resistor R19, the other ends of the capacitor C5 and the resistor R19 are connected with the anode of a diode D2 and the cathode of a diode D3, the cathode of a diode D2 is connected with 12V and the emitter of a PNP triode Q1, and the collector of the PNP triode Q1 is respectively connected with the parallel connection ports of a voltage stabilizing diode Z2, a capacitor C8, a super capacitor EC2, a relay RLY1, a voltage stabilizing diode Z3, a capacitor C2, a super capacitor EC3, a capacitor C3, a resistor R26 and;

2. The RC voltage step-down circuit as claimed in claim 1, wherein the type of the piezoresistor ZNR1 is 10D471K, which is used for surge protection.

3. The RC voltage-reducing circuit of claim 1, wherein ACL1 and ACN1 are connected to power supply terminals, a capacitor C5 and a resistor R19 form an RC voltage-reducing module, a Zener diode Z3 forms a Zener module, and a resistor R26 forms a filter module for a load, a super capacitor EC3 and a capacitor C3.

4. The RC step-down circuit of claim 1, wherein the relay RLY1 is driven by the PNP transistor Q1, and the level shift of the PNP transistor Q1 is realized by the transistor Q2.