CN102969782A - Chip starting circuit - Google Patents
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- CN102969782A CN102969782A CN2012104172493A CN201210417249A CN102969782A CN 102969782 A CN102969782 A CN 102969782A CN 2012104172493 A CN2012104172493 A CN 2012104172493A CN 201210417249 A CN201210417249 A CN 201210417249A CN 102969782 A CN102969782 A CN 102969782A
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Abstract
The invention discloses a chip starting circuit which comprises a charging module, an auxiliary power supply and a first time delay module. The charging module comprises an input power supply, a charging control circuit and a first capacitor. The charging control circuit is connected between the input power supply and the first capacitor so as to control the input power supply to charge the first capacitor, voltage of the first capacitor forms a first starting power supply for starting a first chip, the auxiliary power supply is connected with the first starting power supply and is controlled by the first chip to supply electricity to the first chip, the first starting power supply supplies electricity to the first time delay module, and the first time delay module performs output to the charging control circuit so as to delay cut-off of the charging module. According to the chip starting circuit, the time delay module is adopted to prolong power supply time of the input power supply, so that the auxiliary power supply has enough time to be timely started to supply electricity to the chip, and the problem of instability in chip starting in the prior art is solved.
Description
Technical field
The present invention relates to the circuit engineering field, relate more specifically to a kind of chip enable circuit.
Background technology
Chip (such as power supply control chip etc.) be the core component of integrated circuit, the normal operation of chip has important effect to the overall work effect that guarantees circuit.Extensive use along with chip, people require more and more higher to the startup of chip, as require the low and cost of fast, loss start-up time low etc., and what is more important requires the chip enable process to satisfy certain stability, to guarantee normal startup and the stable operation of chip.
Prior art adopts start-up circuit as shown in Figure 1 usually, it comprises switching tube Q0, the switching tube Q0 of this circuit selects metal oxide semiconductor field effect tube (metal-oxide-semiconductor), the grid of metal-oxide-semiconductor Q0 links to each other with input power VIN with the second resistance R 2 through the first resistance R 1 respectively with drain electrode, the grid of metal-oxide-semiconductor Q0 and source electrode are respectively through the first voltage-stabiliser tube Z1 and the first capacitor C 1 ground connection, wherein the grid of metal-oxide-semiconductor Q0 links to each other with the negative electrode of the first voltage-stabiliser tube Z1, and the voltage VCC of described the first capacitor C 1 namely can be used as the startup power supply of chip; The startup power supply VCC of chip also connects an accessory power supply simultaneously, and this accessory power supply comprises auxiliary winding M and the first diode D1, wherein starts power supply VCC and links to each other with the negative electrode of the first diode D1, and the anode of the first diode D1 is by auxiliary winding M ground connection.
In above-mentioned start-up circuit, input power VIN starts moment, because the existence of the burning voltage of voltage-stabiliser tube Z1, metal-oxide-semiconductor Q0 conducting, input power VIN is 1 charging of the first capacitor C through the second resistance R 2 and metal-oxide-semiconductor Q0, the voltage VCC of the first capacitor C 1 constantly raises, and after the starting resistor value that reaches chip, chip is started working.Behind the chip enable, being started working by the auxiliary winding M of its control, directly is chip power supply by accessory power supply after this.Metal-oxide-semiconductor Q0 grid voltage is the voltage stabilizing value of the first voltage-stabiliser tube Z1, and its source voltage constantly increases with the increase of the voltage of the first capacitor C 1, cause the pressure drop of metal-oxide-semiconductor Q0 grid, source electrode constantly to reduce, when this pressure drop during less than the cut-in voltage of metal-oxide-semiconductor Q0, metal-oxide-semiconductor Q0 turn-offs, thereby cut off the second resistance R 2, reach the effect that reduces the wastage.
Although aforesaid chip enable circuit can reduce the wastage, but but exist and start unsettled problem: when the startup power supply VCC of chip has just reached the starting resistor value of chip, thereby metal-oxide-semiconductor Q0 cuts off charging circuit owing to the pressure drop of its grid, source electrode ends less than the cut-in voltage of metal-oxide-semiconductor Q0, it is short at the time compole at its starting resistor value place to cause like this starting power supply VCC, do not start within this of short duration time such as fruit chip, or auxiliary winding M fails in time to continue as chip power supply, is prone to the unsettled situation of chip enable.
Summary of the invention
The purpose of this invention is to provide and a kind ofly realize that the stable chip enable circuit that starts is existing short because starting power supply compole when the starting resistor place of chip to solve existing chip enable circuit, and the unsettled technical problem of the accessory power supply chip enable that causes for chip power supply not prompt enough.
In order to realize purpose of the present invention, the technical solution adopted in the present invention is: a kind of chip enable circuit is provided, it comprises charging module, accessory power supply and the first time delay module, described charging module comprises input power, charging control circuit and the first electric capacity, described charging control circuit is connected between input power and the first electric capacity with the control inputs power supply described the first capacitor charging, the voltage of described the first electric capacity is formed for starting first of the first chip and starts power supply, described accessory power supply and first starts power supply and links to each other and be controlled by described the first chip and be described the first chip power supply, described the first startup power supply is the power supply of the first time delay module, and described the first time delay module exports charging control circuit to postpone to cut off charging module.
Its further technical scheme is: described the first time delay module comprises the first delay circuit and the first switching circuit; The first delay circuit comprises the 3rd diode, the 3rd resistance, the 4th resistance, the 3rd electric capacity and the 3rd voltage-stabiliser tube, the input voltage of this first delay circuit is the first startup power supply, this input voltage links to each other with the negative electrode of the 3rd diode, the anode of the 3rd diode is successively through the 3rd resistance and the 3rd capacity earth, the 4th resistance is connected in parallel on the two ends of the branch road that is comprised of the 3rd diode and the 3rd resistance, and the negative electrode of the 3rd voltage-stabiliser tube is connected on the tie point of the 3rd resistance and the 3rd electric capacity; The first switching circuit comprises the first switching tube, and the base stage of this first switching tube links to each other with the anode of the 3rd voltage-stabiliser tube, and its collector electrode links to each other with the grid of switching tube, its grounded emitter.
Its further technical scheme is: described charging control circuit comprises the first resistance, the second resistance, switching tube, the second diode and the second voltage-stabiliser tube, wherein the grid of switching tube links to each other with input power with the second resistance through the first resistance respectively with drain electrode, the grid of switching tube links to each other with the negative electrode of the second voltage-stabiliser tube, the source electrode of switching tube links to each other with the anode of the second diode, the anode of the second diode links to each other with the anode of the second voltage-stabiliser tube, the negative electrode of the second diode is through the first capacity earth, the two ends of described the first electric capacity also are parallel with one the 4th voltage-stabiliser tube, the plus earth of the 4th voltage-stabiliser tube; Described accessory power supply comprises auxiliary winding and the first diode, and wherein the negative electrode of the first diode and the first startup power supply link to each other, and the anode of the first diode is through auxiliary winding earth.
Its further technical scheme is: described charging control circuit also comprises second switch pipe and the 6th resistance, described the 6th resistance one end links to each other with the source electrode of switching tube, the other end links to each other with the anode of the second diode, the collector electrode of described second switch pipe links to each other with the grid of switching tube, the base stage of second switch pipe links to each other with the source electrode of switching tube, and the emitter of second switch pipe links to each other with the anode of the second voltage-stabiliser tube.
Its further technical scheme is: described the first time delay module also comprises the 5th resistance, and described the 5th resistance is connected between the base stage and emitter of described the first switching tube.
Its further technical scheme is: also comprise the second time delay module, described the second time delay module comprises the second delay circuit, second switch circuit and the 5th electric capacity, wherein the second delay circuit and second switch circuit all are connected to described the first startup power supply, described second switch circuit is connected between the second delay circuit and the 5th electric capacity and starts power supply to described the 5th capacitor charging to control first, and the voltage of described the 5th electric capacity is formed for starting second of the second chip and starts power supply.
Its further technical scheme is: described the second delay circuit comprises the 7th resistance, the 4th electric capacity and the 5th voltage-stabiliser tube, the input voltage of this second delay circuit is the first startup power supply, described first starts power supply successively through the 7th resistance and the 4th capacity earth, and the negative electrode of the 5th voltage-stabiliser tube is connected on the tie point of the 7th resistance and the 4th electric capacity; Described second switch circuit comprises the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 3rd switching tube and the 4th switching tube, the 8th resistance is connected between the base stage and emitter of the 3rd switching tube, the emitter of the 3rd switching tube and first starts power supply and links to each other, the base stage of the 3rd switching tube links to each other through the collector electrode of the 9th resistance with the 4th switching tube, the grounded emitter of the 4th switching tube, the base stage of described the 4th switching tube links to each other through the anode of the 11 resistance with the 5th voltage-stabiliser tube; Described the 5th electric capacity is connected between the emitter of the collector electrode of the 3rd switching tube and the 4th switching tube.
Its further technical scheme is: described the second time delay module also comprises the tenth resistance, and described the tenth resistance is connected between the base stage and emitter of described the 4th switching tube.
Its further technical scheme is: described the second time delay module also comprises the 4th diode, and the anode of described the 4th diode and first starts power supply and links to each other, and its negative electrode links to each other with the emitter of the 3rd switching tube.
Its further technical scheme is: described switching tube is the N-type metal-oxide-semiconductor.
Compared with prior art, the power-on time that chip enable circuit provided by the present invention prolongs input power by setting up one first time delay module, because first starts power supply obtains the first time delay module at the starting resistor value place of chip delayed action, accessory power supply has in time start enough start-up times and for chip power supply, avoids producing the unsettled problem of the existing chip enable of prior art.In addition, be controlled the time of delay that the first time delay module produces, and can come the control lag time by the parameter value of selecting suitable circuit elements device, so also solved in the prior art uncontrollable technological deficiency start-up time.
By following description also by reference to the accompanying drawings, it is more clear that the present invention will become, and these accompanying drawings are used for explaining embodiments of the invention.
Description of drawings
Fig. 1 is the circuit diagram of existing chip enable circuit;
Fig. 2 is the circuit block diagram of chip enable circuit the first embodiment of the present invention;
Fig. 3 is the physical circuit figure of the first embodiment shown in Figure 2;
Fig. 4 is the circuit block diagram of chip enable circuit the second embodiment of the present invention;
Fig. 5 is the physical circuit figure of the second embodiment shown in Figure 2.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme among the embodiment is clearly and completely described, similar assembly label represents similar assembly in the accompanying drawing.Obviously, below only be the present invention's part embodiment with the embodiment that describes, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 2 and Fig. 3 have showed the first embodiment of chip enable circuit of the present invention.Referring to Fig. 2, the chip enable circuit that present embodiment provides comprises charging module 11, accessory power supply 12 and the first time delay module 13.Wherein, charging module 11 comprises input power VIN, charging control circuit 111 and the first capacitor C 1, described charging control circuit 111 is connected between input power VIN and the first capacitor C 1 and with control inputs power supply VIN described the first capacitor C 1 is charged, the voltage of described the first capacitor C 1 is formed for starting first of the first chip (not shown) and starts power supply VCC1, described accessory power supply 12 and first starts power supply VCC1 and links to each other and be controlled by described the first chip and be described the first chip power supply, described the first startup power supply VCC1 also is 13 power supplies of the first time delay module simultaneously, and described the first time delay module 13 exports charging control circuit 111 to postpone to cut off charging module 11.
Particularly, referring to Fig. 3, described charging control circuit 111 comprises the first resistance R 1, the second resistance R 2, switching tube Q0, the second diode D2 and the second voltage-stabiliser tube Z2.In this example, switching tube Q0 selects metal-oxide-semiconductor, the grid of switching tube Q0 links to each other with input power VIN with the second resistance R 2 through the first resistance R 1 respectively with drain electrode, the grid of switching tube Q0 links to each other with the negative electrode of the second voltage-stabiliser tube Z2, the source electrode of switching tube Q0 links to each other with the anode of the second diode D2, the anode of the second diode D2 links to each other with the anode of the second voltage-stabiliser tube Z2, the negative electrode of the second diode D2 is through the first capacitor C 1 ground connection, more stable in order to make first of the first chip start power supply VCC1, be parallel with the 4th voltage-stabiliser tube Z4, the plus earth of the 4th voltage-stabiliser tube Z1 at the first capacitor C 1 two ends.
It is that chip power supply is to keep the normal operation of chip that described accessory power supply 12 is used for behind chip enable.The accessory power supply 12 of present embodiment comprises auxiliary winding M and the first diode D1, and wherein the negative electrode of the first diode D1 and the first startup power supply VCC1 link to each other, and the anode of the first diode D1 is through auxiliary winding M ground connection.
Described the first time delay module 13 comprises the first delay circuit 131 and the first switching circuit 132.Wherein, the first delay circuit 131 comprises the 3rd diode D3, the 3rd resistance R 3, the 4th resistance R 4, the 3rd capacitor C 3 and the 3rd voltage-stabiliser tube Z3, the input voltage of this first delay circuit 131 is the first startup power supply VCC1, this input voltage links to each other with the negative electrode of the 3rd diode D3, the anode of the 3rd diode D3 is successively through the 3rd resistance R 3 and the 3rd capacitor C 3 ground connection, the 4th resistance R 4 is connected in parallel on the two ends of the branch road that is comprised of the 3rd diode D3 and the 3rd resistance R 4, and the negative electrode of the 3rd voltage-stabiliser tube Z3 is connected on the tie point of the 3rd resistance R 3 and the 3rd capacitor C 3.And the first switching circuit 132 comprises the first switching tube Q1, and the base stage of this first switching tube Q1 links to each other with the anode of the 3rd voltage-stabiliser tube Z3, and its collector electrode links to each other with the grid of switching tube Q0, its grounded emitter.
Operation principle based on the chip enable circuit of foregoing circuit design is as follows: in the moment of charging control circuit 111 access input power VIN, the burning voltage of the second voltage-stabiliser tube Z2 clamper makes switching tube Q0 conducting, input power VIN is 1 charging of the first capacitor C through the second resistance R 2 and switching tube Q0, the voltage of the first capacitor C 1 (namely first start power supply VCC1) raises and is stable at the voltage stabilizing value of the 4th voltage-stabiliser tube Z4, because the voltage stabilizing value of the 4th voltage-stabiliser tube Z4 is greater than the starting resistor value of the first chip, the first chip can normally start; The first startup power supply VCC1 is 3 chargings of the 3rd capacitor C by the 4th resistance R 4 simultaneously, the voltage of the 3rd capacitor C 3 constantly increases to the 3rd voltage-stabiliser tube Z3 conducting and makes voltage between the first switching tube Q1 base stage and the emitter greater than the cut-in voltage of the first switching tube Q1, thereby make the first switching tube Q1 conducting and drag down collector voltage and then the on-off switching tube Q0 of switching tube Q0, cut off charging module 11 and reduce the loss of whole circuit.
Wherein, the first time delay module 13 can be stablized a period of time the first startup power supply VCC1 of chip when reaching the voltage stabilizing value of the 4th voltage-stabiliser tube Z4, auxiliary like this winding M has time enough to start and is chip power supply, make the start-up course of chip more stable, thereby solved in the prior art because starting power supply VCC compole when the starting resistor place of chip shortly, and auxiliary winding M can not in time start the unsettled problem of chip enable that produces for chip power supply.Simultaneously be controlled the time of delay of the first time delay module 13, can come the control lag time by the value of selecting suitable resistance, electric capacity and voltage-stabiliser tube, so also solved in the prior art uncontrollable technological deficiency start-up time.
When the said chip start-up circuit works, if there is not the existence of the second diode D2, then the first voltage that starts power supply VCC1 can be behind the second voltage-stabiliser tube Z2 and the first switching tube Q1 ground connection, the such first voltage that starts power supply VCC1 can be moved ground to, therefore, the setting of the second diode D2 can have been avoided above-mentioned phenomenon effectively.The electric weight of the 3rd capacitor C 3 is via the 4th resistance R 4 and very little the 3rd resistance R 3 discharges of resistance, because the resistance of the 3rd resistance R 3 is very little, the 3rd diode D3 of its series connection has guaranteed the only conducting in the 3rd capacitor C 3 discharge processes of the 3rd resistance R 3 effectively, and discharge process speed is accelerated.The electric quantity consumption of the 3rd capacitor C 3 is to the voltage stabilizing value less than the 3rd voltage-stabiliser tube Z3, and the 3rd voltage-stabiliser tube Z3 turn-offs, and the first switching tube Q1 is turn-offed, and then the grid voltage of switching tube Q0 is no longer dragged down, and gets back to initial condition.
Switching tube Q0 is important devices in above-mentioned charging control circuit 111, if the situation of overcurrent occurs, switching tube Q0 very easily damages.In order effectively to protect this switching tube Q0, present embodiment also has additional second switch pipe Q2 and the 6th resistance R 6 to form the current foldback circuit of switching tube Q0 in this partial circuit.Wherein, described second switch pipe Q2 selects triode, described the 6th resistance R 6 one ends link to each other with the source electrode of switching tube Q0, the other end links to each other with the anode of the second diode D2, the collector electrode of described second switch pipe Q2 links to each other with the grid of switching tube Q0, the base stage of second switch pipe Q2 links to each other with the source electrode of switching tube Q0, and the emitter of second switch pipe Q2 links to each other with the anode of the second voltage-stabiliser tube Z2.When 111 normal operation of this charging control circuit, because the source current of switching tube Q0 is less, the voltage at the 6th resistance R 6 two ends, i.e. the voltage of the base stage of second switch pipe Q2 and emitter littlely can't reach its starting resistor, so second switch pipe Q2 shutoff; When super-high-current occurring, the voltage at the 6th resistance R 6 two ends can sharply increase, and makes second switch pipe Q2 conducting, and then on-off switching tube Q0, reaches the effect of protection switch pipe Q0.
In some circuit, tend to use a plurality of chips, because the job order of each chip is inconsistent, so need to provide the startup power supply in the different moment for different chips, the second embodiment of the present invention provides a kind of chip enable circuit that different sequential can be provided for this reason.
Referring to Fig. 4, the chip enable circuit of present embodiment can be used for successively starting the chip (being respectively the first chip and the second chip) that different sequential require, charging module 11, accessory power supply 12 and first time delay module 13 of this chip enable circuit in comprising the first embodiment, also set up the second time delay module 14.In the present embodiment, still the voltage by the first capacitor C 1 in the charging module 11 starts power supply VCC1 to start the first chip as first, and the above-mentioned and similar circuit structure of the first embodiment does not repeat them here.
The second time delay module 14 that present embodiment is set up is used for starting the second chip, this second time delay module 14 comprises the second delay circuit 141, second switch circuit 142 and the 5th capacitor C 5, wherein the second delay circuit 141 and second switch circuit 142 all are connected to described the first startup power supply VCC1, described second switch circuit 142 is connected between the second delay circuit 141 and the 5th electric capacity and starts power supply VCC1 to described the 5th capacitor charging to control first, and the voltage of described the 5th capacitor C 5 is formed for starting second of the second chip and starts power supply VCC2.
Particularly, referring to Fig. 5, described the second delay circuit 141 comprises the 7th resistance R 7, the 4th capacitor C 4 and the 5th voltage-stabiliser tube Z5.The input voltage of this second delay circuit 141 is that first of the first chip starts power supply VCC1, described first starts power supply VCC1 successively through the 7th resistance R 7 and the 4th capacitor C 4 ground connection, and the negative electrode of the 5th voltage-stabiliser tube Z5 is connected on the tie point of the 7th resistance R 7 and the 4th capacitor C 4.Second switch circuit 142 comprises the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 3rd switching tube Q3 and the 4th switching tube Q4.In the present embodiment, the 3rd switching tube Q3 and the 4th switching tube Q4 select triode.The emitter of the 3rd switching tube Q3 and first starts power supply VCC1 and links to each other, the emitter of the 3rd switching tube Q3 links to each other with its base stage through the 8th resistance R 8, the base stage of the 3rd switching tube Q3 links to each other the grounded emitter of described the 4th switching tube Q4 through the 9th resistance R 9 with the collector electrode of the 4th switching tube Q4; The base stage of described the 4th switching tube Q4 links to each other with the anode of the 5th voltage-stabiliser tube Z5 through the 11 resistance R 11.The 5th capacitor C 5 is connected between the emitter of the collector electrode of the 3rd switching tube Q3 and the 4th switching tube Q4, and the voltage of the 5th capacitor C 5 forms second and starts power supply VCC2, is the startup power supply of the second chip.
In the present embodiment, accessory power supply 12 is to be controlled by the second chip, so the first time delay module 13 is to start power supply VCC2 power supply by second, thereby so that behind the second chip enable, the first time delay module 13 just cuts off the power supply of input power VIN, and transferring by accessory power supply 12 is that the first chip and the second chip are powered simultaneously.
The specific works principle of foregoing circuit is as described below: at first, input power VIN is 1 charging of the first capacitor C through the second resistance R 2 and switching tube Q0, and first starts power supply VCC1 raises gradually, and is the first chip power supply; This first startup power supply VCC1 is 4 chargings of the 4th capacitor C through the 7th resistance R 7 simultaneously, the voltage of the 4th capacitor C 4 constantly increase to the 5th voltage-stabiliser tube Z5 conducting and make the base stage of the 4th switching tube Q4 and the voltage between the emitter greater than the cut-in voltage of the 4th switching tube Q4, thereby make the 4th switching tube Q4 conducting and make the 8th resistance R 8 and the 9th resistance place branch road conducting, the 3rd switching tube Q3 conducting during greater than the cut-in voltage of the 3rd switching tube Q3 of the voltage at the 8th resistance R 8 two ends, such the first startup power supply VCC1 is 5 chargings of the 5th capacitor C through the 3rd switching tube Q3, and the voltage of the 5th capacitor C 5 is second and starts power supply VCC2; Start power supply VCC2 and raise gradually and reach the starting resistor of the second chip and start the second chip when second, auxiliary winding M by the second chip controls starts working, be the first chip and the second chip power supply simultaneously, and in the second chip enable process, second starts power supply VCC2 turn-offs switching tube Q0 after the time-delay of the first delay circuit 131, thereby cuts off whole charging module 11 to save energy consumption.
Wherein, can set for the second time of delay that starts between power supply VCC2 and the first startup power supply VCC1 by the selection of device in the second delay circuit 141, as select the value of suitable resistance, electric capacity and voltage-stabiliser tube to come the control lag time; The first chip and the second chip continue power supply by accessory power supply 12 after startup is finished.
Preferably, for the adverse current that prevents the 5th capacitor C 5 causes adverse effect to device, have additional the 4th diode D4 between the emitter of the first startup power supply VCC1 and the 3rd switching tube Q3, the negative electrode of the 4th diode D4 links to each other with the emitter of the 3rd switching tube Q3.
Preferably, in order to allow the 4th switching tube Q4 more stable work, also can between the base stage of the 4th switching tube Q4 and emitter, be connected the tenth resistance R 10.
In the chip enable circuit of this second embodiment, because the startup of accessory power supply 12 is by the second chip controls, so the first time delay module 13 is just started working when the second chip enable, its input voltage is the second startup power supply VCC2, and switching tube Q0 turn-offs after the second chip enable is finished; Understandably, if the startup of auxiliary winding M is by the first chip controls, then switching tube Q0 can namely turn-off behind the first chip enable, and this moment, the input power of the first delay circuit 131 was the first startup power supply VCC1, and the start-up course of the second chip is powered by auxiliary winding M.Certainly, can also increase the 3rd or the 4th time delay module etc. according to the needs of side circuit, like this, can accomplish to provide for a plurality of chips the startup power supply of different sequential.
As mentioned above, the power-on time that chip enable circuit provided by the present invention prolongs input power VIN by setting up one first time delay module 13, because first starts power supply obtains the first time delay module at the starting resistor value place of chip delayed action, accessory power supply has in time start enough start-up times and for chip power supply, avoids producing the unsettled problem of the existing chip enable of prior art.And be controlled the time of delay that the first time delay module 13 produces, and can come the control lag time by the parameter value of selecting suitable circuit elements device, so also solved in the prior art uncontrollable technological deficiency start-up time.In addition, also can set up the startup power supply that second, third time delay module comes to provide for a plurality of chips different sequential.
Need to prove that in chip enable circuit of the present invention, each switching tube mainly plays on-off action at work, in actual applications, can select as required the device of on-off action, all can such as triode, metal-oxide-semiconductor or IGBT etc.
Above invention has been described in conjunction with preferred embodiment, but the present invention is not limited to the embodiment of above announcement, and should contain the various modifications of carrying out according to essence of the present invention.
Claims (10)
1. chip enable circuit, it is characterized in that: comprise charging module (11), accessory power supply (12) and the first time delay module (13), described charging module (11) comprises input power (VIN), charging control circuit (111) and the first electric capacity (C1), described charging control circuit (111) is connected between input power (VIN) and the first electric capacity (C1) and with control inputs power supply (VIN) described the first electric capacity (C1) is charged, the voltage of described the first electric capacity (C1) is formed for starting first of the first chip and starts power supply (VCC1), described accessory power supply (12) and first starts power supply (VCC1) and links to each other and be controlled by described the first chip and be described the first chip power supply, described the first startup power supply (VCC1) is the first time delay module (11) power supply, and described the first time delay module (11) exports charging control circuit (111) to postpone to cut off charging module (11).
2. chip enable circuit according to claim 1, it is characterized in that: described charging control circuit (111) comprises the first resistance (R1), the second resistance (R2), switching tube (Q0), the second diode (D2) and the second voltage-stabiliser tube (Z2), wherein the grid of switching tube (Q0) links to each other with input power (VIN) with the second resistance (R2) through the first resistance (R1) respectively with drain electrode, the grid of switching tube (Q0) links to each other with the negative electrode of the second voltage-stabiliser tube (Z2), the source electrode of switching tube (Q0) links to each other with the anode of the second diode (D2), the anode of the second diode (D2) links to each other with the anode of the second voltage-stabiliser tube (Z2), the negative electrode of the second diode (D2) is through the first electric capacity (C1) ground connection, the two ends of described the first electric capacity (C1) also are parallel with one the 4th voltage-stabiliser tube (Z4), the plus earth of the 4th voltage-stabiliser tube (Z1);
Described accessory power supply (12) comprises auxiliary winding (M) and the first diode (D1), and wherein the negative electrode of the first diode (D1) and the first startup power supply (VCC1) link to each other, and the anode of the first diode (D1) is through auxiliary winding (M) ground connection.
3. chip enable circuit according to claim 2, it is characterized in that: described the first time delay module (13) comprises the first delay circuit (131) and the first switching circuit (132); The first delay circuit (131) comprises the 3rd diode (D3), the 3rd resistance (R3), the 4th resistance (R4), the 3rd electric capacity (C3) and the 3rd voltage-stabiliser tube (Z3), the input voltage of this first delay circuit (131) is the first startup power supply (VCC1), this input voltage links to each other with the negative electrode of the 3rd diode (D3), the anode of the 3rd diode (D3) is successively through the 3rd resistance (R3) and the 3rd electric capacity (C3) ground connection, the 4th resistance (R4) is connected in parallel on the two ends of the branch road that is comprised of the 3rd diode (D3) and the 3rd resistance (R4), and the negative electrode of the 3rd voltage-stabiliser tube (Z3) is connected on the tie point of the 3rd resistance (R3) and the 3rd electric capacity (C3); The first switching circuit (132) comprises the first switching tube (Q1), and the base stage of this first switching tube (Q1) links to each other with the anode of the 3rd voltage-stabiliser tube (Z3), and its collector electrode links to each other with the grid of switching tube (Q0), its grounded emitter.
4. chip enable circuit according to claim 3, it is characterized in that: described the first time delay module (13) also comprises the 5th resistance (R5), described the 5th resistance (R5) is connected between the base stage and emitter of described the first switching tube (Q1).
5. chip enable circuit according to claim 2, it is characterized in that: described charging control circuit (111) also comprises second switch pipe (Q2) and the 6th resistance (R6), described the 6th resistance (R6) end links to each other with the source electrode of switching tube (Q0), the other end links to each other with the anode of the second diode (D2), the collector electrode of described second switch pipe (Q2) links to each other with the grid of switching tube (Q0), the base stage of second switch pipe (Q2) links to each other with the source electrode of switching tube (Q0), and the emitter of second switch pipe (Q2) links to each other with the anode of the second voltage-stabiliser tube (Z2).
6. each described chip enable circuit according to claim 1-5, it is characterized in that: also comprise the second time delay module (14), described the second time delay module (14) comprises the second delay circuit (141), second switch circuit (142) and the 5th electric capacity (C5), wherein the second delay circuit (141) and second switch circuit (142) all are connected to described the first startup power supply (VCC1), described second switch circuit (142) is connected between the second delay circuit (141) and the 5th electric capacity (C5) and starts power supply (VCC1) to described the 5th electric capacity (C5) charging to control first, and the voltage of described the 5th electric capacity (C5) is formed for starting second of the second chip and starts power supply (VCC2).
7. chip enable circuit according to claim 6, it is characterized in that: described the second delay circuit (141) comprises the 7th resistance (R7), the 4th electric capacity (C4) and the 5th voltage-stabiliser tube (Z5), the input voltage of this second delay circuit (141) is the first startup power supply (VCC1), described first starts power supply (VCC1) successively through the 7th resistance (R7) and the 4th electric capacity (C4) ground connection, and the negative electrode of the 5th voltage-stabiliser tube (Z5) is connected on the tie point of the 7th resistance (R7) and the 4th electric capacity (C4);
Described second switch circuit (142) comprises the 8th resistance (R8), the 9th resistance (R9), the tenth resistance (R10), the 11 resistance (R11), the 3rd switching tube (Q3) and the 4th switching tube (Q4), wherein the 8th resistance (R8) is connected between the base stage and emitter of the 3rd switching tube (Q3), the emitter of the 3rd switching tube (Q3) and first starts power supply (VCC1) and links to each other, the base stage of the 3rd switching tube (Q3) links to each other through the collector electrode of the 9th resistance (R9) with the 4th switching tube (Q4), the grounded emitter of the 4th switching tube (Q4), the base stage of described the 4th switching tube (Q4) links to each other through the anode of the 11 resistance (R11) with the 5th voltage-stabiliser tube (Z5);
Described the 5th electric capacity (C5) is connected between the emitter of the collector electrode of the 3rd switching tube (Q3) and the 4th switching tube (Q4).
8. chip enable circuit according to claim 7, it is characterized in that: described the second time delay module (14) also comprises the tenth resistance (R10), described the tenth resistance (R10) is connected between the base stage and emitter of described the 4th switching tube (Q4).
9. chip enable circuit according to claim 7, it is characterized in that: described the second time delay module (14) also comprises the 4th diode (D4), the anode of described the 4th diode (D4) and first starts power supply (VCC1) and links to each other, and its negative electrode links to each other with the emitter of the 3rd switching tube (Q3).
10. chip enable circuit according to claim 9, it is characterized in that: described switching tube (Q0) is the N-type metal-oxide-semiconductor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210417249.3A CN102969782B (en) | 2012-10-26 | 2012-10-26 | Chip starting circuit |
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| CN201210417249.3A CN102969782B (en) | 2012-10-26 | 2012-10-26 | Chip starting circuit |
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| CN102969782A true CN102969782A (en) | 2013-03-13 |
| CN102969782B CN102969782B (en) | 2015-02-25 |
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| CN201210417249.3A Active CN102969782B (en) | 2012-10-26 | 2012-10-26 | Chip starting circuit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333722A (en) * | 2014-10-30 | 2015-02-04 | 青岛歌尔声学科技有限公司 | Low power consumption starting circuit and liquid crystal television |
| CN105323925A (en) * | 2015-11-04 | 2016-02-10 | 浙江榆阳电子有限公司 | Power supply quick starting circuit |
| CN109067161A (en) * | 2018-08-09 | 2018-12-21 | 中国铁道科学研究院集团有限公司 | A kind of power safety activation system |
| CN110729883A (en) * | 2019-10-25 | 2020-01-24 | 天津航空机电有限公司 | Quick start circuit applied to flyback converter |
| CN112098739A (en) * | 2020-05-27 | 2020-12-18 | 深圳天邦达科技有限公司 | Battery package short-circuit protection test circuit, circuit board and test equipment |
| WO2023246506A1 (en) * | 2022-06-25 | 2023-12-28 | 广州金升阳科技有限公司 | Starting control circuit and switching power source system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335513A (en) * | 2007-06-27 | 2008-12-31 | 北京中电华大电子设计有限责任公司 | Power-on system construction applicable to multiple power system smart cards |
| CN101729048A (en) * | 2008-10-23 | 2010-06-09 | 佛山普立华科技有限公司 | Delay circuit |
| CN102158067A (en) * | 2011-04-20 | 2011-08-17 | 广州金升阳科技有限公司 | Starting circuit for switching power supply |
| CN202231609U (en) * | 2011-08-03 | 2012-05-23 | 深圳市英威腾电气股份有限公司 | Current-limiting device and electric system |
| CN202364112U (en) * | 2011-11-20 | 2012-08-01 | 合肥华耀电子工业有限公司 | Starting circuit of control chip of switching-mode power supply |
-
2012
- 2012-10-26 CN CN201210417249.3A patent/CN102969782B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335513A (en) * | 2007-06-27 | 2008-12-31 | 北京中电华大电子设计有限责任公司 | Power-on system construction applicable to multiple power system smart cards |
| CN101729048A (en) * | 2008-10-23 | 2010-06-09 | 佛山普立华科技有限公司 | Delay circuit |
| CN102158067A (en) * | 2011-04-20 | 2011-08-17 | 广州金升阳科技有限公司 | Starting circuit for switching power supply |
| CN202231609U (en) * | 2011-08-03 | 2012-05-23 | 深圳市英威腾电气股份有限公司 | Current-limiting device and electric system |
| CN202364112U (en) * | 2011-11-20 | 2012-08-01 | 合肥华耀电子工业有限公司 | Starting circuit of control chip of switching-mode power supply |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333722A (en) * | 2014-10-30 | 2015-02-04 | 青岛歌尔声学科技有限公司 | Low power consumption starting circuit and liquid crystal television |
| CN104333722B (en) * | 2014-10-30 | 2017-07-07 | 青岛歌尔声学科技有限公司 | A kind of low-power consumption start-up circuit and a kind of LCD TV |
| CN105323925A (en) * | 2015-11-04 | 2016-02-10 | 浙江榆阳电子有限公司 | Power supply quick starting circuit |
| CN109067161A (en) * | 2018-08-09 | 2018-12-21 | 中国铁道科学研究院集团有限公司 | A kind of power safety activation system |
| CN110729883A (en) * | 2019-10-25 | 2020-01-24 | 天津航空机电有限公司 | Quick start circuit applied to flyback converter |
| CN112098739A (en) * | 2020-05-27 | 2020-12-18 | 深圳天邦达科技有限公司 | Battery package short-circuit protection test circuit, circuit board and test equipment |
| CN112098739B (en) * | 2020-05-27 | 2024-02-23 | 深圳天邦达科技有限公司 | Battery pack short-circuit protection test circuit, circuit board and test equipment |
| WO2023246506A1 (en) * | 2022-06-25 | 2023-12-28 | 广州金升阳科技有限公司 | Starting control circuit and switching power source system |
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|---|---|
| CN102969782B (en) | 2015-02-25 |
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