CN208112214U - A kind of burning chip protection circuit - Google Patents
A kind of burning chip protection circuit Download PDFInfo
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- CN208112214U CN208112214U CN201820078946.3U CN201820078946U CN208112214U CN 208112214 U CN208112214 U CN 208112214U CN 201820078946 U CN201820078946 U CN 201820078946U CN 208112214 U CN208112214 U CN 208112214U
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Abstract
A kind of burning chip protection circuit is disclosed, including：Comparison module receives input voltage and reference voltage；And switch module, according to the comparison result of comparison module output come turn-on and turn-off, control terminal is connected with the output end of comparison module, and output end is connected with chip.Comparison module includes：Comparator, the first input end of comparator receive input voltage, and the second input terminal receives reference voltage, and output end provides switching signal.Switch module includes：Switching tube, control terminal are connected with the output end of comparator, and the first path terminal receives input voltage, and alternate path end is connected with the Input voltage terminal of chip.Circuit is protected in burning by being connected to chip input terminal, it is ensured that the stabilized input voltage of chip reduces manufacturing cost to improve the working efficiency of IC burning.
Description
Technical field
The utility model relates to burning chip fields, relate more specifically to a kind of burning chip protection circuit.
Background technique
Printed circuit board (PCB) develops to two-sided, multilayer and flexibility from single layer, and still keeps respective development and become
Gesture.Due to constantly developing to high-precision, high density and high reliability direction, constantly reduces volume, reduces cost, raising property
Can, so that printed board still maintains powerful vitality in the development engineering of future electronic equipment.In order to reduce PCB's
Volume can choose with programmable integrated circuit (integrated circuit, IC) on PCB plate, can will encode burning
Into in IC.
Supply voltage during the IC burning of the prior art needs to control in a certain range, such as when the electricity of IC burning
When source voltage is 3.3V, the burning of IC can be normally carried out.However, in a practical situation, the process of IC burning exists much not
Stable factor, it may appear that situations such as coding makes a variation so as to cause the spread of voltage of burning mould group, and then leads to the burning of IC
Can not be normally carried out, and make it is subsequent carry out burning again again, reduce working efficiency, increase manufacturing cost.
Utility model content
The purpose of this utility model is to provide a kind of burning chips to protect circuit, by the burning for being connected to chip input terminal
Record protection circuit, it is ensured that the stabilized input voltage of chip reduces manufacturing cost to improve the working efficiency of IC burning.
According to a kind of burning chip protection circuit provided by the utility model, including：Comparison module, receive input voltage with
And reference voltage；And switch module, it is connected between the input voltage and the Input voltage terminal of chip, according to the comparison
The comparison result of module output carrys out turn-on and turn-off, and control terminal is connected with the output end of the comparison module, output end
It is connected with the chip.
Preferably, comparison module includes：The first input end of comparator, the comparator receives input voltage, and second is defeated
Enter end and receive reference voltage, output end provides switching signal.
Preferably, the switch module includes：Switching tube, control terminal are connected with the output end of the comparator,
First path terminal receives input voltage, and alternate path end is connected with the input voltage of the chip.
Preferably, the first input end is noninverting input, and second input terminal is reverse input end, the switch
Pipe is NMOS tube.
Preferably, the first input end is reverse input end, and second input terminal is noninverting input, the switch
Pipe is PMOS tube.
Preferably, comparison module further includes：Bleeder circuit, it is described with reference to electricity for obtaining the source voltage
Pressure.
Preferably, the bleeder circuit includes the first resistor and the second electricity that consecutive is associated between the supply voltage and ground
The common node of resistance, the first resistor and second resistance provides the reference voltage.
According to a kind of programmable integrated circuit provided by the utility model, circuit is protected including above-mentioned burning chip.
The voltage input end of IC burning is arranged in burning chip protection circuit according to the present utility model, for controlling IC core
Piece is connected and disconnected from.When the burning chip protection circuit analysis input voltage size voltage required for burning range it
When interior, chip is connected, carries out IC burning.When the burning chip protects the size of circuit analysis input voltage not needed for burning
When wanting within the scope of voltage, chip is disconnected, IC burning stops.Circuit is protected in burning by being connected to chip input terminal,
The stabilized input voltage that can guarantee chip, avoids burning from doing over again, to improve the working efficiency of IC burning, reduce manufacture at
This.
Detailed description of the invention
By referring to the drawings to the description of the utility model embodiment, above-mentioned and other mesh of the utility model
, feature and advantage will be apparent from.
Fig. 1 shows the structural schematic diagram that circuit is protected according to the burning chip of the utility model embodiment.
Fig. 2 shows the circuit diagrams that circuit is protected according to the burning chip of the utility model first embodiment.
Fig. 3 shows the circuit diagram that circuit is protected according to the burning chip of the utility model second embodiment.
Specific embodiment
Hereinafter reference will be made to the drawings is more fully described the utility model.In various figures, identical element is using similar
Appended drawing reference indicate.For the sake of clarity, the various pieces in attached drawing are not necessarily to scale.In addition, may in figure
Certain well known parts are not shown.
Many specific details of the utility model, such as the structure of component, material, size, place are described hereinafter
Science and engineering skill and technology, to be more clearly understood that the utility model.But just as the skilled person will understand,
The utility model can not be realized according to these specific details.
It should be appreciated that being known as being located at another floor, another area when by a floor, a region when describing the structure of component
When domain " above " or " top ", can refer to above another layer, another region, or its with another layer, it is another
Also comprising other layers or region between a region.Also, if by part turnover, this layer, a region will be located at it is another
Layer, another region " following " or " lower section ".
A kind of burning chip protection circuit provided by the utility model can be used in programmable integrated circuit.
Fig. 1 shows the structural schematic diagram that circuit is protected according to the burning chip of the utility model embodiment.
Fig. 1 is please referred to, the burning chip protection circuit of the utility model embodiment includes comparison module 100 and switch
Module 200.Wherein, comparison module 100 receives input voltage VIN and reference voltage VREF, and comparison module 100 is according to input electricity
Press the conducting and disconnection of VIN and reference voltage VREF control switch module 200.Switch module be connected to input voltage VIN with
Between the Input voltage terminal of chip 300, the comparison result exported according to comparison module 100 is come turn-on and turn-off.Switch module
200 control terminal is connected with the output end of comparison module 100, and output end is connected with chip 300, further, switch
The output end of module 200 is connected with the input terminal of the chip 300.When the burning chip protects circuit analysis input voltage
When the size of VIN is within the scope of voltage required for burning, chip 300 is connected, carries out IC burning.When the burning chip is protected
When protection circuit analyzes the size of input voltage VIN not within the scope of voltage required for burning, chip 300 is disconnected, IC is burnt
Record stops.
Fig. 2 shows the circuit diagrams that circuit is protected according to the burning chip of the utility model first embodiment.
Referring to figure 2., comparison module 100 includes comparator 110a.Comparator 110a is used for the effect in supply voltage V+
Under, switching signal is obtained by comparing reference voltage VREF and input voltage VIN.The first input end of comparator 110a receives defeated
Enter voltage VIN, the second input terminal receives reference voltage VREF, the control of the output end VOUT and switch module 200 of comparator 100a
End processed is connected to provide switching signal.Specifically, first input end is noninverting input, the second input terminal is reversed input
End.Switch module 200 connects or disconnects chip 300 according to switching signal.Preferably, comparison module 100 further includes point
Volt circuit 120a is used for supply voltage V+To obtain reference voltage VREF.Bleeder circuit 120a includes being connected on supply voltage V+
First resistor R between ground1With second resistance R2, first resistor R1With second resistance R2Common node provide reference voltage
VREF, reference voltage VREF, supply voltage V+, first resistor R1 and second resistance R2 be：
Switch module 200 includes switching tube Q1, switching tube Q1Control terminal be connected with the output end VOUT of comparator 100a
It connects, switching tube Q1The first path terminal receive input voltage VIN, switching tube Q1Alternate path end and burning/recording chip chip 300
It is connected.In switch module 200, switching tube Q1For N-channel transistor (NMOS tube).
The burning chip of the utility model first embodiment protects circuit, by comparator 110a by input voltage VIN with
Reference voltage VREF is compared.When input voltage VIN is greater than reference voltage VREF, the output end VOUT of comparator 110a is defeated
High level out, so that switching tube Q1Conducting, input voltage VIN are powered to chip 300, start IC burning；Work as input voltage VIN
When less than reference voltage VREF, so that switching tube Q1It disconnects, burning can not be carried out.
Fig. 3 shows the circuit diagram that circuit is protected according to the burning chip of the utility model second embodiment.
Referring to figure 3., comparison module 100 includes comparator 110b.Comparator is used under the action of supply voltage V+, is led to
It crosses comparison reference voltage VREF and input voltage VIN obtains switching signal, the second input terminal of comparator 110b is received with reference to electricity
VREF is pressed, first input end receives input voltage VIN, the output end VOUT of comparator 110b and the control terminal of switch module 200
It is connected to provide switching signal.Specifically, first input end is reverse input end, second input terminal is input in the same direction
End.Switch module 200 connects or disconnects chip 300 according to switching signal.Preferably, comparison module 100 further includes point
Volt circuit 120b, for supply voltage V+ to be obtained to reference voltage VREF.Bleeder circuit 120b includes being connected on supply voltage V
+ first resistor the R3 and second resistance R4, first resistor R3 and second resistance R between ground4Common node provide with reference to electricity
Press VREF, reference voltage VREF, supply voltage V+, first resistor R3 and second resistance R4 be：
Switch module 200 includes switching tube Q2, switching tube Q2Control terminal be connected with the output end VOUT of comparator 110b
It connects, switching tube Q2The first path terminal receive input voltage VIN, switching tube Q2Alternate path end and burning/recording chip chip 300
It is connected.In switch module 200, switching tube Q2For p channel transistor (PMOS tube).
The burning chip of the utility model second embodiment protects circuit, by comparator 110b by input voltage VIN with
Reference voltage VREF is compared.When input voltage VIN is greater than reference voltage VREF, the output end VOUT of comparator 110b is defeated
Low level out, so that switching tube Q2Conducting, input voltage VIN are powered to chip 300, start IC burning；Work as input voltage VIN
When less than reference voltage VREF, so that switching tube Q2It disconnects, burning can not be carried out.
In conclusion the voltage input end of IC burning is arranged in burning chip protection circuit according to the present utility model, use
In being connected and disconnected from for control IC chip 300.Circuit is protected in burning by being connected to chip input terminal, it is ensured that chip 300
Stabilized input voltage, avoid burning from doing over again, to improve the working efficiency of IC burning, reduce manufacturing cost.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
It is as described above according to the embodiments of the present invention, these embodiments details all there is no detailed descriptionthe,
Also not limiting the utility model is only the specific embodiment.Obviously, as described above, many modification and change can be made
Change.These embodiments are chosen and specifically described to this specification, is in order to preferably explain the principles of the present invention and actually to answer
With so that skilled artisan be enable to utilize the utility model and repairing on the basis of the utility model well
Change use.The utility model is limited only by the claims and their full scope and equivalents.
Claims (8)
1. a kind of burning chip protects circuit, which is characterized in that including：
Comparison module receives input voltage and reference voltage；
Switch module is connected between the input voltage and the Input voltage terminal of chip, according to comparison module output
Comparison result carrys out turn-on and turn-off, and control terminal is connected with the output end of the comparison module, output end and the chip
It is connected.
2. burning chip according to claim 1 protects circuit, which is characterized in that the comparison module includes：
Comparator, the first input end of the comparator receive input voltage, and the second input terminal receives reference voltage, and output end mentions
For switching signal.
3. burning chip according to claim 2 protects circuit, which is characterized in that the switch module includes：Switching tube,
Its control terminal is connected with the output end of the comparator, the first path terminal receive input voltage, alternate path end with it is described
The Input voltage terminal of chip is connected.
4. burning chip according to claim 3 protects circuit, which is characterized in that the first input end is input in the same direction
End, second input terminal are reverse input end, and the switching tube is NMOS tube.
5. burning chip according to claim 3 protects circuit, which is characterized in that the first input end is reversed input
End, second input terminal are noninverting input, and the switching tube is PMOS tube.
6. burning chip according to claim 2 protects circuit, which is characterized in that comparison module further includes：
Bleeder circuit, for source voltage to be obtained to the reference voltage.
7. burning chip according to claim 6 protects circuit, which is characterized in that the bleeder circuit includes being connected on institute
The first resistor and second resistance between supply voltage and ground are stated, the node between the first resistor and second resistance provides institute
State reference voltage.
8. a kind of programmable integrated circuit, which is characterized in that burnt including chip described according to claim 1 any one of -7
Record protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820078946.3U CN208112214U (en) | 2018-01-17 | 2018-01-17 | A kind of burning chip protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820078946.3U CN208112214U (en) | 2018-01-17 | 2018-01-17 | A kind of burning chip protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208112214U true CN208112214U (en) | 2018-11-16 |
Family
ID=64128498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820078946.3U Active CN208112214U (en) | 2018-01-17 | 2018-01-17 | A kind of burning chip protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208112214U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858869A (en) * | 2019-11-12 | 2021-05-28 | 深南电路股份有限公司 | PCBA board burning and testing method and system |
-
2018
- 2018-01-17 CN CN201820078946.3U patent/CN208112214U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858869A (en) * | 2019-11-12 | 2021-05-28 | 深南电路股份有限公司 | PCBA board burning and testing method and system |
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Address after: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee after: InfoVision Optoelectronics(Kunshan)Co.,Ltd. Address before: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee before: INFOVISION OPTOELECTRONICS (KUNSHAN) Co.,Ltd. |