CN209170313U - A kind of Darlington driving chip - Google Patents

Abstract

The utility model discloses a kind of Darlington driving chips, chip body and the circuit being arranged in inside chip body, the circuit includes multichannel for the Darlington module of output drive signal, at least one power module for powering and the isolation module for the Darlington module and power module to be isolated, wherein, the Darlington module connects isolation module, and the isolation module is isolated by Darlington module and power module.The utility model reduces the area of pcb board, facilitates the circuit layout on pcb board, reduce cost, while avoiding influence of the Darlington driving to power supply stability by the way that isolation module is arranged by being integrated with power module in driving chip.

Description

A kind of Darlington driving chip

Technical field

The utility model relates to electronic technology packaging field, in particular to a kind of Darlington driving chip.

Background technique

With electronic technology more and more common application in daily life, function of the various electronic products to integrated circuit With require increasingly to be promoted.In the application such as relay or lamp driving, the driving of multichannel Darlington electric current is not required nothing more than, is also required integrated There is 3.3V power circuit.

Current solution is usually that two integrated circuits are arranged on one piece of pcb board, is all the way driving chip, all the way For power supply chip, the area of pcb board, and the layout of inconvenient pcb board are not only increased, while also adding cost.

Thus the prior art could be improved and improve.

Utility model content

Place in view of above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a kind of Darlington chips, can Power supply module is integrated on driving chip, to reduce the area of pcb board, is facilitated the circuit layout on pcb board, is reduced cost.

In order to achieve the above object, the utility model takes following technical scheme:

A kind of Darlington driving chip, comprising:

Chip body；

Circuit inside chip body is set, further comprising: multichannel is used for the Darlington mould of output drive signal Block, at least one power module for powering and the isolation module for the Darlington module and power module to be isolated, Wherein, the Darlington module connects isolation module, and the isolation module is isolated by Darlington module and power module.

In the Darlington driving chip, be provided on the chip body several with inside the chip body The connected pin of circuit, the pin include at least Darlington driving pin, common pin, grounding pin and power pins.

In the Darlington driving chip, the Darlington driving pin includes that signal input pin and signal output are drawn Foot, the power pins include power input pin and power supply output pin.

In the Darlington driving chip, the quantity of the Darlington driving pin is 6 pairs.

In the Darlington driving chip, the power module is 3.3V power module.

In the Darlington driving chip, the Darlington module include first resistor, second resistance, 3rd resistor, One end connection signal input of first diode, the second diode, the first triode and the second triode, the first resistor is drawn The other end of foot, the first resistor connects the base stage of the first triode and one end of second resistance, first triode Collector connects the cathode and signal output pin of the anode of first diode, the collector of the second triode, the second diode, One end, the base stage of the second triode and the emitter of the first triode of the other end connection 3rd resistor of the second resistance, The emitter connection anode of the second diode, the other end of 3rd resistor, isolation module and the grounding lead of second triode Foot.

In the Darlington driving chip, the isolation module includes third transistor, the hair of the third transistor Emitter-base bandgap grading connects the emitter of the second triode, and the base stage and collector of the third transistor are grounded.

In the Darlington driving chip, the power module includes voltage-stablizer, and the end VCC of the voltage-stablizer connects electricity Source input pin, the end VOUT of the voltage-stablizer connect power supply output pin, the ground terminal ground connection of the voltage-stablizer.

In the Darlington driving chip, first triode and the second triode are NPN type triode, described the Three triodes are PNP type triode.

In the Darlington driving chip, the Darlington driving chip is encapsulated as SOP16 encapsulation or DIP16 envelope Dress.

Compared to the prior art, Darlington driving chip provided by the utility model, chip body and setting are in chip sheet The circuit in internal portion, the circuit include multichannel for output drive signal Darlington module, at least one is for power supply Power module and isolation module for the Darlington module and power module to be isolated, wherein the Darlington module, every It is sequentially connected from module and power module.The utility model reduces pcb board by being integrated with power module in driving chip Area, facilitate the circuit layout on pcb board, reduce cost, while avoiding Darlington by the way that isolation module is arranged and driving pair The influence of power supply stability.

Detailed description of the invention

Fig. 1 is the structural block diagram of Darlington driving chip provided by the utility model.

Fig. 2 is the schematic diagram of the isolating device in Darlington driving chip provided by the utility model.

Fig. 3 is the circuit theory schematic diagram of a preferred embodiment of Darlington driving chip provided by the utility model.

Fig. 4 is the encapsulation schematic diagram of a preferred embodiment of Darlington driving chip provided by the utility model.

Specific embodiment

The utility model provides a kind of Darlington driving chip, to make the purpose of this utility model, technical solution and effect It is clearer, clear, the utility model is further described as follows in conjunction with drawings and embodiments.It should be appreciated that herein Described specific embodiment only to explain the utility model, is not used to limit the utility model.

Referring to Fig. 1, a kind of Darlington driving chip provided by the utility model, including chip body and setting are in chip The circuit of body interior, the circuit further comprises: multichannel for output drive signal Darlington module 1, at least one Isolation module 3 for the power module 2 of power supply and for the Darlington module and power module to be isolated, wherein described Darlington module 1, isolation module 3 and power module 2 are sequentially connected.

Specifically, the utility model is subtracted by the way that directly power module and Darlington module are integrated in chip piece The small area of pcb board facilitates the circuit layout on pcb board, reduces cost, while avoiding Da Lin by setting isolation module Influence of the driving to power supply stability.

Furthermore, it is understood that referring to Fig. 2, it is the schematic illustration of isolation module 3, when Darlington module drive is because of certain When kind of reason (such as driving inductive load) causes the end GND1 in Fig. 2 to occur being greater than the positive voltage of 0.6V, the end GND1 and GND3 it Between PN junction by forward conduction, by A, B, C block form in Fig. 2 PNP pipe by saturation conduction, most charges at the end GND1 It will be put away by the end GND3, the voltage that not will lead to the end GND2 rises namely GND2 will play the role of good divider wall, thus It will not influence the job stability of power module.

It should be understood that a part of the circuit inside above-mentioned modules, that is, chip body, can also be write as electricity Source circuit etc., the chip have been internally integrated modules (i.e. each circuit), so that the function of chip greatly increases, have had Body draws different pins in application, can according to need, and makes it have different functions.

Furthermore, it is understood that referring to Fig. 4, being provided on the chip body several in the Darlington driving chip The pin that a circuit with inside the chip body is connected, the pin include at least Darlington and drive pin, common pin COM, grounding pin and power pins E.

Furthermore, it is understood that please continue to refer to Fig. 3, the Darlington driving pin include signal input pin 1B, 2B, 3B, 4B, 5B and 6B and signal output pin 1C, 2C, 3C, 4C, 5C and 6C, wherein the signal input pin and signal output Pin is arranged in pairs, the corresponding signal output pin of each signal input pin, it is preferred that in the present embodiment, the Darlington The quantity for driving pin is 6 pairs, i.e., Darlington driving signal provided by the utility model is the driving of 6 road Darlingtons, certainly, at it In its embodiment, the Darlington driving of different numbers also can be used, the utility model is not construed as limiting this；The power pins Including power input pin Vin and power supply output pin Vout, it is preferred that the power module that the utility model uses is 3.3V Power module, for exporting 3.3V DC power supply, certainly, in other embodiments, the power module can be also 1.8V electricity The combination of source module, 5V power module or a variety of different electrical power modules, the utility model comparison are not construed as limiting.

Furthermore, it is understood that referring to Fig. 4, in a preferred embodiment of the Darlington chips, the Darlington module Including first resistor R1, second resistance R2,3rd resistor R3, first diode D1, the second diode D2, the first triode Q1 and One end connection signal input pin of second triode Q2, the first resistor R1, the other end connection of the first resistor R1 The base stage of first triode and one end of second resistance, the collector connection first diode Q1 of first triode is just Pole, the collector of the second triode Q2, the second diode D2 cathode and signal output pin, the second resistance R2's is another One end, the base stage of the second triode Q2 and the emitter of the first triode Q1 of end connection 3rd resistor R3, the two or three pole The emitter connection anode of the second diode D2, the other end of 3rd resistor R3, isolation module 3 and the grounding pin of pipe Q2.

Specifically, the first triode Q1 and the second triode Q2 forms darlington amplifier, for what will be inputted Darlington signal exports again after amplifying processing, specifically, the first triode Q1 and the second triode Q2 is NPN type three Pole pipe, the first diode D1 is protection diode, and when Darlington output pin has abnormal high pressure, charge can be by the One diode D1 is discharged into common end, so that electric elements be avoided to damage.

Furthermore, it is understood that please continue to refer to Fig. 4, in a preferred embodiment of the Darlington chips, the isolation mode Block 3 includes third transistor Q3, and the emitter of the third transistor Q3 connects the emitter of the second triode Q2, the third The base stage and collector of triode Q3 is grounded, and the third transistor Q3 is isolation triode, can be by Darlington module and electricity Source module isolation guarantees that the two will not interfere with each other, specifically, the third transistor Q3 is PNP type triode.

Furthermore, it is understood that please continue to refer to Fig. 4, in a preferred embodiment of the Darlington chips, the power supply mould Block 2 includes voltage-stablizer U1, and the end VCC of the voltage-stablizer U1 connects power input pin, the end the VOUT connection of the voltage-stablizer U1 Power supply output pin, the ground terminal ground connection of the voltage-stablizer U1, the power supply that the voltage-stablizer U1 is used to input carry out at pressure stabilizing It is exported after reason, in the present embodiment, the voltage-stablizer U1 after the power supply signal of input is converted to 3.3V power supply for exporting.

Preferably, Darlington driving chip provided by the utility model can be using SOP16 encapsulation or DIP16 encapsulation.

In conclusion Darlington driving chip provided by the utility model, chip body and setting are inside chip body Circuit, Darlington module that the circuit includes multichannel for output drive signal, at least one power supply mould for power supply Block and isolation module for the Darlington module and power module to be isolated, wherein the Darlington module, isolation module It is sequentially connected with power module.The utility model reduces the face of pcb board by being integrated with power module in driving chip Product facilitates the circuit layout on pcb board, reduces cost, while avoiding Darlington driving to power supply by the way that isolation module is arranged The influence of stability.

It is understood that for those of ordinary skills, can with technical solution according to the present utility model and The design of its utility model is subject to equivalent substitution or change, and all these changes or replacement all should belong to appended by the utility model Scope of protection of the claims.

Claims (10)

1. a kind of Darlington driving chip characterized by comprising

Chip body；

Circuit inside chip body is set, further comprising: Darlington module, extremely of the multichannel for output drive signal A few isolation module for the power module of power supply and for the Darlington module and power module to be isolated, wherein The Darlington module connects isolation module, and the isolation module is isolated by Darlington module and power module.

2. Darlington driving chip according to claim 1, which is characterized in that be provided with several on the chip body The pin being connected with the circuit inside the chip body, the pin include at least Darlington driving pin, common pin, connect Ground pin and power pins.

3. Darlington driving chip according to claim 2, which is characterized in that the Darlington driving pin includes signal Input pin and signal output pin, the power pins include power input pin and power supply output pin.

4. Darlington driving chip according to claim 3, which is characterized in that the quantity of Darlington driving pin is 6 pairs.

5. Darlington driving chip according to claim 4, which is characterized in that the power module is 3.3V power supply mould Block.

6. Darlington driving chip according to claim 5, which is characterized in that the Darlington module includes the first electricity Resistance, second resistance, 3rd resistor, first diode, the second diode, the first triode and the second triode, first electricity One end connection signal input pin of resistance, the other end of the first resistor connect the base stage and second resistance of the first triode The collector of one end, first triode connects the anode of first diode, the collector of the second triode, the second diode Cathode and signal output pin, other end connection one end of 3rd resistor of the second resistance, the second triode base stage With the emitter of the first triode, the emitter of second triode connect the anode of the second diode, 3rd resistor it is another One end, isolation module and grounding pin.

7. Darlington driving chip according to claim 6, which is characterized in that the isolation module includes the three or three pole Pipe, the emitter of the third transistor connect the emitter of the second triode, the base stage and collector of the third transistor It is grounded.

8. Darlington driving chip according to claim 7, which is characterized in that the power module includes voltage-stablizer, institute The end the VCC connection power input pin of voltage-stablizer is stated, the end VOUT of the voltage-stablizer connects power supply output pin, the voltage-stablizer Ground terminal ground connection.

9. Darlington driving chip according to claim 8, which is characterized in that first triode and the second triode For NPN type triode, the third transistor is PNP type triode.

10. Darlington driving chip according to claim 3, which is characterized in that the encapsulation of the Darlington driving chip For SOP16 encapsulation or DIP16 encapsulation.