CN104932602B - Integrated circuit capable of setting multifunctional parameters and method for setting multifunctional parameters of the integrated circuit - Google Patents
Integrated circuit capable of setting multifunctional parameters and method for setting multifunctional parameters of the integrated circuit Download PDFInfo
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- CN104932602B CN104932602B CN201410104517.5A CN201410104517A CN104932602B CN 104932602 B CN104932602 B CN 104932602B CN 201410104517 A CN201410104517 A CN 201410104517A CN 104932602 B CN104932602 B CN 104932602B
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Abstract
The present invention provides an integrated circuit capable of setting multifunctional parameters and a method for setting the multifunctional parameters of the integrated circuit. The method herein comprises the following steps: providing the integrated circuit which includes a multifunctional pin and a switch unit; coupling the multifunctional pin to an external setting unit; executing a voltage sampling process to the external setting unit via a first operation process of the switch unit, and setting a first functional parameter based on the result of the voltage sampling process; setting a second functional parameter based on a second operation process of the switch unit.
Description
Technical field
The invention relates to a kind of power management integrated circuit, espespecially a kind of integrated electricity with multi function parameter setting
Road and its multi function parameter establishing method.
Background technology
Fig. 1 is existing integrated circuit（Integrated circuit, referred to as：IC）With the circuit of external setting-up unit
Figure.Refer to Fig. 1.Integrated circuit 10 includes current mirror 12, amplifier 14, ON time generator 16 and resistance RTon.In electric current
Electric current I in mirror 12VinWith electric current ITonRatio be 1：K.External setting-up unit 20 includes resistance RVin1With resistance RVin2.Resistance
RVin1With resistance RVin2It is connected to after series connection between reference voltage Vin and ground.
Existing integrated circuit 10 needs a special pin P_Vin to obtain the partial pressure information of reference voltage Vin, with
As the benchmark for calculating ON time.Pin P_Vin magnitude of voltage be reference voltage Vin via resistance RVin1With resistance RVin2
Dividing ratios and the partial pressure information that obtains.Amplifier 14 and first resistor RTonPartial pressure information is converted into into electric current IVin。
Electric current ITonIt is represented by：ITon=K × IVin。
Electric current IVinIt is represented by：IVin=(Vin×RVin2/(RVin1+RVin2))/RTon。
Electric current ITonIt is relevant with reference voltage Vin, it is represented by ITon(Vin)。
Fig. 2 is the circuit diagram of the ON time generator of Fig. 1.Refer to Fig. 2.ON time generator 16 includes switch
SW, capacitor CTonAnd amplifier 18.Electric current ITonTo capacitor CTon.Capacitor CTonThe magnitude of voltage at two ends is capacitance voltage
VTon.Amplifier 18 is according to output voltage Vout and capacitance voltage VTonTo produce the ON time Ton of tool pulse wave form.
When electric pressure converter includes integrated circuit 10, the operating frequency of electric pressure converter（Fsw, it is not shown）Can be by partial pressure
Resistance ratio RVin2/(RVin1+RVin2) setting.
ON time ToN is represented by：Ton=(CTon×Vout)/ITon=(Vout/Vin)×(1/K)×(RTon×
CTon)/[RVin2/(RVin1+RVin2)]。
Operating frequency Fsw is represented by：Fsw=1/ (Ton × Vin/Vout)=K/ (RTon×CTon)×[RVin2/(RVin1+
RVin2)]。
Fig. 3 and Fig. 4 is the circuit diagram of existing integrated circuit and external setting-up unit.Electric pressure converter generally also needs to it
The setting of his function.Refer to Fig. 3 and Fig. 4.Integrated circuit 30 or 40 carries out over current protection by pin P_Ioca or P_Iocb
The level setting of shield.In figure 3 integrated circuit 30 includes the current source 32 and circuit overcurrent protection 34 of electric current Ioc, and outside sets
Order unit includes resistance Roc, and wherein voltage Voc is represented by Voc=Ioc × Roc.In the diagram external setting-up unit includes electricity
It is connected between reference voltage Vref and ground after resistance Roca and resistance Rocb, resistance Roca and resistance Rocb series connection, wherein voltage
Voc is represented by Voc=Vref × Rocb/ (Roca+Rocb).
As can be seen here, with the progress of electronic technology, the function of integrated circuit is also more and more.However, integrated circuit
Pin count is limited, therefore some integrated circuits cannot increase other function settings by limited pin.Additionally, constantly
Increase pin, this can cause overall integrated circuit area and package area to become big, increase manufacturing cost.
The content of the invention
In view of this, the present invention proposes a kind of integrated circuit with multi function parameter setting and its multi function parameter setting
Method, to solve the problems, such as that prior art is addressed.
The present invention provides a kind of integrated circuit with multi function parameter setting.Integrated circuit couples external setting-up unit.
Integrated circuit includes multifunctional pins, the first function adjustment circuit, the second function adjustment circuit and switch element.Multifunctional access
Pin couples external setting-up unit.Second function adjustment circuit couples multifunctional pins.Switch element couples multifunctional pins and the
One function adjustment circuit.Before integrated circuit externally produces starting-up signal, the first function adjustment circuit is by switch element
First operation processes and performs voltage sampling to outside setup unit and process, with the result setting first processed according to voltage sampling
Functional parameter.After integrated circuit produces starting-up signal, at the second operation that the second function adjustment circuit passes through switch element
Manage to set the second functional parameter.
In one embodiment of this invention, the first function adjustment circuit includes the first sampling and holding circuit, the second sampling
And holding circuit and the first current source.Switch element includes first switch, second switch and the 3rd switch.First switch
First end couples multifunctional pins, and its second end coupling first is sampled and holding circuit, and its control end is controlled by the first control letter
Number.The first end coupling multifunctional pins of second switch, its sampling of the second end coupling second and holding circuit, its control end is controlled
In the second control signal.The first end coupling multifunctional pins of the 3rd switch, its second end couples the first current source, its control end
It is controlled by the second control signal.The first control signal and the second control signal are applied to switch list in processing in the first operation
When first, the second control signal is the synchronous inversion signal of the first control signal.
In one embodiment of this invention, external setting-up unit includes resistor network, and resistor network receives reference voltage simultaneously
And branch pressure voltage is provided to multifunctional pins.
In one embodiment of this invention, the first function adjustment circuit also includes computing circuit and the first function setting electricity
Road.The sampling of computing circuit coupling first and holding circuit and the second sampling and holding circuit.Computing circuit according to voltage sampling
The voltage that first sampling voltage of process is relevant with the second sampling voltage carries out computing, to produce the first signal.First function sets
Circuit is determined to receive the first signal and react on the first signal setting the first functional parameter.First functional parameter is set as
The one of which that overcurrent protection sets and current balance type sets.
The present invention reintroduces a kind of multi function parameter establishing method, and it is comprised the following steps：Integrated circuit is provided, and it is integrated
Circuit includes multifunctional pins and switch element；Coupling multifunctional pins are in external setting-up unit；Externally produce in integrated circuit
Before raw starting-up signal, processed by the first operation of switch element and voltage sampling is performed to outside setup unit and is processed, according to
First functional parameter is set with the result processed according to voltage sampling；And after integrated circuit produces starting-up signal, pass through
Second operation of switch element processes to set the second functional parameter.
In an one exemplary embodiment of the present invention, wrapped according to the step of voltage sampling process the first functional parameter of setting
Include：Computing is carried out using the voltage relevant with the first sampling voltage and the second sampling voltage that voltage sampling is processed, to produce
One signal；And the first signal is reacted on setting the first functional parameter.
The present invention provides again a kind of integrated circuit with multi function parameter setting.Integrated circuit couples external setting-up list
Unit, external setting-up unit has the first setup parameter and the second setup parameter.Integrated circuit includes that multifunctional pins, switch are single
Unit, the first function adjustment circuit and the second function adjustment circuit.Multifunctional pins couple external setting-up unit.Switch element coupling
Connect multifunctional pins.First function adjustment circuit couples switch element.Second function adjustment circuit couples switch element.Work as execution
During the first function setting program, the first function adjustment circuit using switch element the first operation process, the first setup parameter with
Second setup parameter is setting the first functional parameter.When the second function setting program is performed, the second function adjustment circuit is utilized
Second operation of switch element processes with the first setup parameter to set the second functional parameter.
In one embodiment of this invention, the first setup parameter is dividing ratios, and the second setup parameter is equivalent impedance
Partial pressure.
The present invention provides again a kind of multi function parameter establishing method, and it includes：Integrated circuit is provided, integrated circuit includes many
Function pin and switch element；In external setting-up unit, external setting-up unit has the first setting ginseng to coupling multifunctional pins
Number and the second setup parameter；When the first function setting program is performed, using the first operation process of switch element, the first setting
Parameter sets the first functional parameter with the second setup parameter；And when the second function setting program is performed, it is single using switch
Second operation of unit processes with the first setup parameter to set the second functional parameter.
In one embodiment of this invention, the step of setting the first functional parameter includes：Using with the first sampling voltage and
The relevant voltage of second sampling voltage carries out computing, to produce the first signal；And the first signal is reacted on setting the first work(
Can parameter.
The present invention provides again a kind of integrated circuit with multi function parameter setting.Integrated circuit couples external setting-up list
Unit.Integrated circuit includes multifunctional pins, switch element, the first function adjustment circuit and the second function adjustment circuit.Many work(
Can pin coupling external setting-up unit.Switch element couples multifunctional pins.First function adjustment circuit couples switch element.The
Two function adjustment circuits couple switch element.When the first function adjustment circuit is processed by the first operation of switch element, take
The first sampling voltage and the second sampling voltage, the first function adjustment circuit and according to the first sampling voltage and the second sampling voltage
To produce the first signal, and the first functional parameter is set according to the first signal.When the second function adjustment circuit passes through switch element
Second operation process when, produce secondary signal, and according to secondary signal set the second functional parameter.
The present invention provides again a kind of multi function parameter establishing method, and it includes：Integrated circuit is provided, integrated circuit includes many
Function pin and switch element；Coupling multifunctional pins are in external setting-up unit；Processed by the first operation of switch element
And voltage sampling is performed to outside setup unit and is processed, according to this first functional parameter is set according to the result of voltage sampling process；
And processed to set the second functional parameter according to the second operation of switch element.
The partial pressure of external setting-up unit is utilized based on above-mentioned, of the invention integrated circuit and multi function parameter establishing method
Ratio and equivalent impedance（For example：Parallel resistance value）So that realize that several functions set in same multifunctional pins, and
It is effectively prevented from the problem that integrated circuit area becomes big.On the other hand, compared to existing mode, the integrated circuit of the present invention is made
Circuit area can be smaller, therefore can also reduce manufacturing cost.
It is to be understood that above-mentioned general description and detailed description below are only exemplary and illustrative, it is not
The scope to be protected of the invention can be limited.
Description of the drawings
Figure below is a part for the specification of the present invention, it illustrates embodiments of the invention, accompanying drawing and explanation
The description of book is used for illustrating the principle of the present invention together.
Fig. 1 is the circuit diagram of existing integrated circuit and external setting-up unit；
Fig. 2 is the circuit diagram of the ON time generator of Fig. 1；
Fig. 3 and Fig. 4 is the circuit diagram of existing integrated circuit and external setting-up unit；
Fig. 5 is the schematic diagram of the integrated circuit set according to the multi function parameter of one embodiment of the invention；
Fig. 6 is the time-state method of the integrated circuit of Fig. 5；
Fig. 7 is the detailed circuit diagram of the computing circuit of Fig. 5；
Fig. 8 is the flow chart of the multi function parameter establishing method of one embodiment of the invention.
Description of reference numerals：
10：Integrated circuit；
12：Current mirror；
14：Amplifier；
16：ON time generator；
18：Amplifier；
20：External setting-up unit；
30：Integrated circuit；
32：Current source；
34：Circuit overcurrent protection；
50：Integrated circuit；
510：First function adjustment circuit；
512：First functional unit；
514：First current source；
516：First sampling and holding circuit；
518：Second sampling and holding circuit；
520：Second function adjustment circuit；
522：Computing circuit；
524：First function initialization circuit；
526：First amplifier；
528：Second function initialization circuit；
530：Switch element；
532：First current mirror；
534：Second current source；
536：3rd current source；
538：Logic circuit；
540：External setting-up unit；
710：Second amplifier；
720：3rd amplifier；
730、740、750、760、770：Current mirror；
CTon：Capacitor；
FP1：First functional parameter；
FP2：Second functional parameter；
Ioc：Electric current；
IOCSET：First determines electric current；
ITon：Electric current（Secondary signal）；
IVin：Electric current；
K：Multiplying power；
KM1、KM2、KM3、KM4、KM5：Multiplying power；
NB：Node；
OC/TG：Multifunctional pins；
POR：Starting-up signal；
P_Ioca、P_Iocb：Pin；
P_Vin：Pin；
P1：First control signal；
P2：Second control signal；
RHold1：Second resistance；
RHold2：3rd resistor；
RΔHold：4th resistance；
Roc：Resistance；
Roca：Resistance；
Rocb：Resistance；
RTon：First resistor；
RVin1、RVin2：Resistance；
R1、R2：Resistance；
ST1、ST2：State；
SW：Switch；
SW1：First switch；
SW2：Second switch；
SW3：3rd switch；
S801、S802、S803、S804：Step；
Ton：ON time；
t0、t1、t2：Time；
VDD：Operating voltage；
VHold1：First keeps voltage；
VHold2：Second keeps voltage；
Vin：Reference voltage；
Voc：Voltage；
Vout：Output voltage；
Vref：Reference voltage；
VSample1：First sampling voltage；
VSample2：Second sampling voltage；
Vset：Branch pressure voltage；
VTon：Capacitance voltage；
ΔIHold：Electric current；
ΔV：First signal.
Specific embodiment
Now with detailed reference to embodiments of the invention, and the example of the embodiment is illustrated in the accompanying drawings.In addition, attached
Element/the component of same or like label is for representing same or like part used in figure and embodiment.
In following all embodiments, when element is regarded as being "connected" or "coupled" to another element, it can be directly to connect
Another element is connect or be coupled to, or there may be intervenient element.Term " circuit " is represented by an at least element or many
Individual element, or active and/or the passive and element that is coupled together to provide proper function.Term " signal " can be represented
It is an at least electric current, voltage, load, temperature, data or other signals.
With detailed reference to embodiments of the invention, and the example of the embodiment is illustrated in the accompanying drawings.In addition, in accompanying drawing
And element/the component of identical label represents same or like part used in embodiment.
Fig. 5 is the schematic diagram of the integrated circuit set according to the multi function parameter of one embodiment of the invention.Fig. 6 is Fig. 5
The time-state method of integrated circuit.Please refer to Fig. 5 and Fig. 6.Integrated circuit 50 includes multifunctional pins OC/TG, the first work(
Can adjustment circuit 510, the second function adjustment circuit 520 and switch element 530.First function adjustment circuit 510 includes first
The current source 514 of functional unit 512 and first.Multifunctional pins OC/TG coupling external setting-up units 540, switch element 530,
First function adjustment circuit 510 and the second function adjustment circuit 520.External setting-up unit 540 includes resistor network（Such as electricity
Resistance R1 and R2）, resistor network receives and reference voltage Vin and provides branch pressure voltage Vset to multifunctional pins OC/TG.
In the present embodiment, although resistor network is resistance R1 series resistances R2, but resistor network also can serial or parallel connection
The elements such as electric capacity, to form a resistance value, the resistor network of the present embodiment is not limited to above-mentioned form and can do other changes
Change.
In one embodiment of the invention, external setting-up unit 540 has the first setup parameter（For example：Dividing ratios）With
Two setup parameters（For example：Equivalent impedance or parallel resistance value）, thereby, integrated circuit 50 can utilize switch element 530
Operation, the first setup parameter and the second setup parameter are realizing the several functions parameter setting in same multifunctional pins.Have
The explanation of multi function parameter setting is closed, the description below is refer to.
For convenience of description, it will be assumed that the application of integrated circuit 50 is in a power converter.
Time t0 in Fig. 6, power supply IC_P is supplied to integrated circuit 50.State ST1 represents time t0 to time t1, state
The time span of ST1 is 300 microseconds, or changes time span value with actual design.In state ST1, integrated circuit 50 confirms
Whether its internal power supply status is normal.Power supply inside integrated circuit 50（Such as operating voltage VDD）When normal, then when
Between after t1 integrated circuit 50 proceed by the preparation operation of Power convert, until measuring the defeated of power supply changeover device in time t2
Go out voltage Vout for 85%（Or 90%）Output voltage setting value.When output voltage is 85%（Or 90%）Output voltage set
During definite value, the control unit of 50 pairs of outsides of integrated circuit（It is not shown）Starting-up signal POR is sent, so that power supply changeover device starts just
Often work, and control unit is also some of power supply changeover device.
In one embodiment, before time t 1, the first function adjustment circuit 510 utilizes switch element to integrated circuit 50
530 the first operation is processed, the first setup parameter and the second setup parameter are setting the first functional parameter, that is to say, that first
Function adjustment circuit 510 is processed by the first operation of switch element 530 and outside setup unit 540 is performed at voltage sampling
Reason.For example, for the first voltage on the node NB of external setting-up unit 540（Vset1 is expressed as, not shown in Fig. 5）Carry out
Sampling and holding operation（First sampling voltage VSample1, first keep voltage VHold1）.First operation of switch element 530 is processed
The step of one：Conducting first switch SW1, disconnects the switch SW3 of second switch SW2 and the 3rd.
Before time t 1, the step of the first function adjustment circuit 510 is also processed by the first operation of switch element 530
Two and outside setup unit 540 is applied first to determine electric current IOCSETAnd execution second voltage（Vset2 is expressed as, is not shown in Fig. 5
Go out）Sampling and keep operation（Second sampling voltage VSample2, second keep voltage VHold2）.First behaviour of switch element 530
The step of dealing with two：Disconnect first switch SW1, the switch SW3 of conducting second switch SW2 and the 3rd.First function adjustment circuit
510 keep voltage V according to firstHold1Voltage V is kept with secondHold2The first functional parameter FP1 is set, wherein first keeps electricity
Pressure VHold1Voltage V is kept with secondHold2Respectively with the first sampling voltage VSample1With the second sampling voltage VSample2It is relevant.This
Outward, the setting of the first functional parameter FP1 is relevant with the first signal delta V, therefore the first signal delta V and first keeps voltage VHold1With
Second keeps voltage VHold2It is relevant.
It is after timet state ST2, integrated circuit 50 now（Or power supply changeover device）Make output electric in time t1
Pressure Vout rises.Second function adjustment circuit 520 processes with the first setup parameter to set using the second operation of switch element 530
Fixed second functional parameter.That is, the second function adjustment circuit 520 is processed in state ST2 by the second operation of switch element 530
To set the second functional parameter FP2, wherein the setting of the second functional parameter FP2 is relevant with reference voltage Vin.Switch element 530
The second operation process：Disconnect first switch SW1, the switch SW3 of second switch SW2 and the 3rd.
Second function adjustment circuit 520 includes the first amplifier 526, first resistor RTon, the second current source the 534, the 3rd it is electric
The function initialization circuit 528 of stream source 536 and second.The first input end coupling multifunctional pins OC/TG of the first amplifier 526,
Its second input couples its output end.First resistor RTonFirst end couple the first amplifier 526 output end, it second
End ground connection.Second current source 534 couples first resistor RTonFirst end.Second current source 534 is formed with the 3rd current source 536
First current mirror 532, wherein electric current IVinWith electric current ITonRatio be represented by IVin：ITon=1：KTon.Second function setting electricity
Road 528 receives and reacts on the electric current I of the 3rd current source 536TonTo set the second functional parameter.Additionally, the second functional parameter
Setting can set for ON time.
Specifically, the first function adjustment circuit 510 include the first current source 514, first sample and holding circuit 516,
Second sampling and holding circuit 518, the function initialization circuit 524 of computing circuit 522 and first.Switch element 530 includes first
Switch SW1, the switch SW3 of second switch SW2 and the 3rd.The first end coupling multifunctional pins OC/TG of first switch SW1, its
The sampling of second end coupling first and holding circuit 516, its control end is controlled by the first control signal P1.The of second switch SW2
One end couples multifunctional pins OC/TG, and its second end coupling second is sampled and holding circuit 518, and its control end is controlled by second
Control signal P2.The first end coupling multifunctional pins OC/TG of the 3rd switch SW3, its second end couples the first current source 514,
Its control end is controlled by the second control signal P2.
When the first control signal P1 and the second control signal P2 are applied to switch in state ST1 that the first operation is processed
During unit 530, the second control signal P2 is the synchronous inversion signal of the first control signal P1.
Additionally, integrated circuit 50 may also include logic circuit 538, to produce the first control signal P1 and the second control letter
Number P2.
The sampling of the coupling of computing circuit 522 first and the sampling of holding circuit 516 and second and holding circuit 518, first is protected
Hold voltage VHold1Voltage V is kept with secondHold2Perform computing, such as subtraction operation, to produce the first signal delta V.First function
Initialization circuit 524 is to receive the first signal delta V and react on the first signal delta V setting the first functional parameter FP1.Such as
The setting of one functional parameter FP1 can be the one of which of overcurrent protection setting and current balance type setting.
The step of the first operation of switch element 530 is processed for the moment, first switch SW1 is turned on, disconnects second switch SW2
With the 3rd switch SW3.Vin × R2/ (R1+R2)=Vin × K is expressed as with Vset1Vin2/(KVin1+KVin2), and the first sampling electricity
Pressure VSample1It is also equal to Vset1.First sampling and holding circuit 516 are by the first sampling voltage VSample1Export and become the first guarantor
Hold voltage VHold1。
When two the step of the first operation of switch element 530 being processed, first switch SW1 is disconnected, turn on second switch SW2
With the 3rd switch SW3.[Vin × R2/ (R1+R2)]+[I is expressed as with Vset2OCSET×(R1║R2)]=[Vin×KVin2/(KVin1
+KVin2)]+[IOCSET×RSET×((KVin1×KVin2/(KVin1+KVin2)], and the second sampling voltage VSample2It is also equal to Vset2.
Second sampling and holding circuit 518 are by the second sampling voltage VSample2Export and become the second holding voltage VHold2.
When getting the first holding voltage VHold1And second keep voltage VHold2Afterwards, then via computing circuit 522 can produce
Raw first signal delta V.First signal delta V can be expressed as Δ V=VHold2-VHold1=IOCSET×RSET×[(KVin1×KVin2/
(KVin1+KVin2)], wherein R1=KVin1×RSET, R2=KVin2×RSET.As shown in the above description, it is possible to use the resistance of Fig. 5
R1 and resistance R2 is come the overcurrent level setting needed for setting（over current level setting）.
Fig. 7 is the detailed circuit diagram of the computing circuit of Fig. 5.Refer to Fig. 7.Computing circuit 522 includes the second amplifier
710th, the 3rd amplifier 720, second resistance RHold1, 3rd resistor RHold2, the 4th resistance R ΔsHoldAnd multiple current mirrors 730,
740th, 750,760 and 770.The first input end of the second amplifier 710 receives first and keeps voltage VHold1, its second input coupling
Connect its output end.Second resistance RHold1First end couple the output end of the second amplifier 710, its second end ground connection.3rd puts
The first input end of big device 720 receives second and keeps voltage VHold2, its second input couples its output end.3rd resistor
RHold2First end couple the output end of the 3rd amplifier 720, its second end ground connection.Current mirror 730 couples the second amplifier
710, current mirror 740 couples the 3rd amplifier 720, and current mirror 760 and 770 couples the 4th resistance RΔHold, and export the 4th resistance
RΔHoldThe voltage difference at two ends is with as the first signal delta V.
First keeps voltage VHold1Voltage V is kept with secondHold2Via the second amplifier 710, the 3rd amplifier 720,
Two resistance RHold1, 3rd resistor RHold2Negative-feedback change out electric current IHold1And electric current IHold2, wherein electric current IHold1Can be with
It is expressed as IHold1=VHold1/RHold1, electric current IHold2I can be expressed asHold2=VHold2/RHold2.Electric current IHold1Again via current mirror
730th, 750 mirror and amplify KM1×KM3Times.Electric current IHold2Amplify K via the mirror of current mirror 740 againM2Times.By electric current
KM2×IHold2With electric current KM1×KM3×IHold2Subtract each other and obtain electric current Δ IHold.Electric current Δ IHoldThe mirror of Jing current mirrors 760,770
And amplify KM4×KM5Times, electric current KM4×KM5×ΔIHoldFlow through resistance RΔHoldProduce the first signal delta V.
If KM1=KM2=KM3=KM4=KM5=1 and RHold1=RHold2=RΔHold, then Δ V=VHold2-VHold1=IOCSET×RSET×
[(Kvin1×Kvin2/(Kvin1+Kvin2)].In addition, the computing circuit of the present embodiment is not limited to above-mentioned form and can do other
Change.
Referring again to Fig. 5 and Fig. 6, in the time t0 of state 1 to obtaining the first signal delta V during time t1.Time t1 it
State ST2 afterwards, disconnects first switch SW1, the switch SW3 of second switch SW2 and the 3rd, and branch pressure voltage Vset is represented by Vset
=Vin×R2/(R1+R2)=Vin×Kvin2/(Kvin1+Kvin2), branch pressure voltage Vset via the negative-feedback of the first amplifier 526 with
And first resistor RTonProduce electric current IVin.Second function initialization circuit 528 can be according to electric current IVinSet the second functional parameter
FP2 is producing operating frequency Fsw（It is not shown）.The operating frequency that can utilize existing derivation is calculated with regard to operating frequency Fsw
And learn, so will not be described here.Then operating frequency Fsw can be expressed as Fsw=[KTon/(RTon×CTon)]×[KVin2/
(KVin1+KVin2)].Therefore, by multifunctional pins OC/TG can be obtained using the dividing ratios of resistance R1 and R2 with regard to
The information of reference voltage Vin, sets according to this operating frequency Fsw needed for power supply changeover device.
It is noted that in different conditions, the first signal delta V and electric current ITon（Secondary signal）Can be respectively transmitted to
First function initialization circuit 524 and the second function initialization circuit 528.First function initialization circuit 524 and the second function setting electricity
The form on road 528 can be for as overcurrent protection, current balance type, ON time setting, analog/digital conversion, output
Variation or attenuation function.Therefore, integrated circuit 50 can realize that several functions set in same multifunctional pins OC/TG
It is fixed.
Based on above-described embodiment disclosure of that, can converge it is whole go out a kind of general multi function parameter establishing method.More
For clear, Fig. 8 is the flow chart of the multi function parameter establishing method of one embodiment of the invention.Please refer to Fig. 5, Fig. 6 and
Fig. 8, the multi function parameter establishing method of the present embodiment may comprise steps of.
As shown in step S801, there is provided integrated circuit 50, and integrated circuit 50 includes multifunctional pins OC/TG and switch
Unit 530.
Then step S802 is carried out, multifunctional pins OC/TG is in external setting-up unit 540 for coupling.External setting-up unit 540
With the first setup parameter（For example：Dividing ratios）With the second setup parameter（For example：Equivalent impedance or parallel resistance value）.
Then as shown in step S803, processed by the first operation of switch element 530 and outside setup unit 540 is held
The process of row voltage sampling, sets the first functional parameter FP1 according to the result of voltage sampling process according to this.Such as one, when performing the
During one function setting program, processed by the first operation of switch element 530, the first setup parameter takes with the second setup parameter
Obtain the first sampling voltage VSample1With the second sampling voltage VSample2, according to this according to the first sampling voltage VSample1With the second sampling
Voltage VSample2To set the first functional parameter FP1.Such as two, not yet need Vin correlated currents source to control in integrated circuit 50
Before Vout voltage processed rises, that is, before time t1, by the first operation process of switch element 530 to external setting-up
Unit 540 performs voltage sampling and processes, according to this according to the result of voltage sampling process（First signal delta V）Set the first function ginseng
Number FP1.
Then as shown in step S804, processed to set the second functional parameter according to the second operation of switch element 530
FP2.Such as one, when the second function setting program is performed, processed to set the second work(according to the second operation of switch element 530
Can parameter FP2.Such as two, after integrated circuit 50 produces starting-up signal, start to need to be controlled using Vin correlated currents source
When Vout voltage rises, processed by the second operation of switch element 530（Disconnect first switch SW1, second switch SW2 and the
Three switch SW3）To set the second functional parameter FP2.
In addition, S803 may include according to the step of voltage sampling process the first functional parameter FP1 of setting：Using taking with voltage
First sampling voltage V of sample processSample1With the second sampling voltage VSample2Relevant voltage（That is, first keeps voltage
VHold1Voltage V is kept with secondHold2）Computing is carried out, for example, by first voltage V is keptHold1Voltage V is kept with secondHold2Hold
Row subtraction operates to produce the first signal delta V；And the first signal delta V is reacted on setting the first functional parameter FP1.
In sum, the integrated circuit of the embodiment of the present invention and multi function parameter establishing method utilize external setting-up unit
Dividing ratios and equivalent impedance（For example：Parallel resistance value）So that realize that several functions set in same multifunctional pins
It is fixed, and it is effectively prevented from the problem that integrated circuit area becomes big.On the other hand, compared to existing mode, the present invention's is integrated
The circuit area that circuit is used can be smaller, therefore can also reduce manufacturing cost.
Finally it should be noted that：Various embodiments above only to illustrate technical scheme, rather than a limitation；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, either which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence disengaging various embodiments of the present invention technology of appropriate technical solution
The scope of scheme.
Claims (14)
1. it is a kind of with multi function parameter setting integrated circuit, it is characterised in that coupling one external setting-up unit, it is described integrated
Circuit includes：
One multifunctional pins, couple the external setting-up unit；
One first function adjustment circuit；
One second function adjustment circuit, couples the multifunctional pins；And
One switch element, couples the multifunctional pins and the first function adjustment circuit；
Wherein before the integrated circuit externally produces a starting-up signal, the first function adjustment circuit passes through the switch
One first operation of unit processes and performs a voltage sampling to the external setting-up unit and process, with according to the voltage sampling
The result of process sets one first functional parameter；
Wherein after the integrated circuit produces the starting-up signal, the second function adjustment circuit is single by the switch
The one second of unit operates the state for processing to set one second functional parameter,
The first function adjustment circuit includes one first sampling and holding circuit, one second sampling and holding circuit and one the
One current source,
Wherein one first control signal and one second control signal are applied to the switch in processing in first operation
During unit, second control signal is the synchronous inversion signal of first control signal.
2. integrated circuit according to claim 1, it is characterised in that the switch element includes：
One first switch, its first end couples the multifunctional pins, and its second end coupling described first is sampled and holding circuit,
Its control end is controlled by first control signal；
One second switch, its first end couples the multifunctional pins, and its second end coupling described second is sampled and holding circuit,
Its control end is controlled by second control signal；And
One the 3rd switch, its first end couples the multifunctional pins, and its second end couples first current source, its control end
It is controlled by second control signal.
3. integrated circuit according to claim 1, it is characterised in that the external setting-up unit includes a resistor network,
The resistor network receives a reference voltage and provides a branch pressure voltage to the multifunctional pins.
4. integrated circuit according to claim 2, it is characterised in that the first function adjustment circuit also includes：
One computing circuit, couples first sampling and holding circuit and second sampling and holding circuit, the computing electricity
Road carries out a computing according to the voltage relevant with one first sampling voltage and one second sampling voltage that the voltage sampling is processed,
To produce one first signal；And
One first function initialization circuit, to receive first signal and react on first signal setting described first
Functional parameter.
5. a kind of multi function parameter establishing method, it is characterised in that include：
An integrated circuit is provided, the integrated circuit includes a multifunctional pins and a switch element；
The multifunctional pins are coupled in an external setting-up unit；
It is right by one first operation process of the switch element before the integrated circuit externally produces a starting-up signal
The external setting-up unit performs a voltage sampling and processes, and sets one first work(according to the result of voltage sampling process according to this
Can parameter；And
After the integrated circuit produces the starting-up signal, process to set by one second operation of the switch element
One second functional parameter,
Wherein, the step of setting first functional parameter according to voltage sampling process includes：
A fortune is carried out using the voltage relevant with one first sampling voltage and one second sampling voltage that the voltage sampling is processed
Calculate, to produce one first signal；And
React on first signal to set first functional parameter.
6. it is a kind of with multi function parameter setting integrated circuit, it is characterised in that coupling one external setting-up unit, the outside
Setup unit has one first setup parameter and one second setup parameter, and the integrated circuit includes：
One multifunctional pins, couple the external setting-up unit；
One switch element, couples the multifunctional pins；
One first function adjustment circuit, couples the switch element；And
One second function adjustment circuit, couples the switch element；
Wherein when one first function setting program is performed, the first function adjustment circuit is using the one the of the switch element
One operation is processed, first setup parameter sets one first functional parameter with second setup parameter；
Wherein when one second function setting program is performed, the second function adjustment circuit is using the one the of the switch element
Two operations process with first setup parameter to set one second functional parameter,
The first function adjustment circuit includes one first sampling and holding circuit, one second sampling and holding circuit and one the
One current source,
Wherein one first control signal and one second control signal are applied to the switch in processing in first operation
During unit, second control signal is the synchronous inversion signal of first control signal.
7. integrated circuit according to claim 6, it is characterised in that the switch element includes：
One first switch, its first end couples the multifunctional pins, and its second end coupling described first is sampled and holding circuit,
Its control end is controlled by first control signal；
One second switch, its first end couples the multifunctional pins, and its second end coupling described second is sampled and holding circuit,
Its control end is controlled by second control signal；And
One the 3rd switch, its first end couples the multifunctional pins, and its second end couples first current source, its control end
It is controlled by second control signal.
8. integrated circuit according to claim 6, it is characterised in that first setup parameter is a dividing ratios, institute
The second setup parameter is stated for an equivalent impedance partial pressure.
9. a kind of multi function parameter establishing method, it is characterised in that include：
An integrated circuit is provided, the integrated circuit includes a multifunctional pins and a switch element；
The multifunctional pins are coupled in an external setting-up unit, wherein the external setting-up unit has one first setup parameter
With one second setup parameter；
When one first function setting program is performed, using the one first operation process of the switch element, first setting
Parameter sets one first functional parameter with second setup parameter；And
When one second function setting program is performed, processed and the described first setting using one second operation of the switch element
Parameter setting one second functional parameter,
The step of wherein setting first functional parameter includes：
A computing is carried out using the voltage relevant with one first sampling voltage and one second sampling voltage, to produce one first letter
Number；And
React on first signal to set first functional parameter.
10. multi function parameter establishing method according to claim 9, it is characterised in that first setup parameter is
Dividing ratios, second setup parameter is an equivalent impedance partial pressure.
11. a kind of integrated circuits with multi function parameter setting, it is characterised in that one external setting-up unit of coupling, the collection
Include into circuit：
One multifunctional pins, couple the external setting-up unit；
One switch element, couples the multifunctional pins；
One first function adjustment circuit, couples the switch element；And
One second function adjustment circuit, couples the switch element；
Wherein when the first function adjustment circuit is processed by one first operation of the switch element, obtain one first and take
Sample voltage and one second sampling voltage, the first function adjustment circuit simultaneously takes according to first sampling voltage with described second
Sample voltage sets one first functional parameter producing one first signal according to first signal；
Wherein when the second function adjustment circuit is processed by one second operation of the switch element, produce one second and believe
Number, and one second functional parameter is set according to the secondary signal.
12. integrated circuits according to claim 11, it is characterised in that the first function adjustment circuit includes one first
Sample and holding circuit, one second sampling and holding circuit and one first current source, and the switch element includes：
One first switch, its first end couples the multifunctional pins, and its second end coupling described first is sampled and holding circuit,
Its control end is controlled by one first control signal；
One second switch, its first end couples the multifunctional pins, and its second end coupling described second is sampled and holding circuit,
Its control end is controlled by one second control signal；And
One the 3rd switch, its first end couples the multifunctional pins, and its second end couples first current source, its control end
It is controlled by second control signal；
The first control signal and second control signal are applied to described wherein described in process in first operation
During switch element, second control signal is the synchronous inversion signal of first control signal.
13. integrated circuits according to claim 12, it is characterised in that the first function adjustment circuit also includes：
One computing circuit, couples first sampling and holding circuit and second sampling and holding circuit, the computing electricity
Road carries out a computing according to the voltage relevant with first sampling voltage and second sampling voltage, to produce one first letter
Number；And
One first function initialization circuit, to receive first signal and react on first signal setting described first
Functional parameter.
14. a kind of multi function parameter establishing methods, it is characterised in that include：
An integrated circuit is provided, the integrated circuit includes a multifunctional pins and a switch element；
The multifunctional pins are coupled in an external setting-up unit；
Processed by one first operation of the switch element and a voltage sampling is performed to the external setting-up unit and is processed, according to
One first functional parameter is set with the result processed according to the voltage sampling；And
Processed to set one second functional parameter according to one second operation of the switch element,
The step of wherein setting first functional parameter according to voltage sampling process includes：
A computing is carried out using the voltage relevant with one first sampling voltage and one second sampling voltage, to produce one first letter
Number；And
React on first signal to set first functional parameter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410104517.5A CN104932602B (en) | 2014-03-19 | 2014-03-19 | Integrated circuit capable of setting multifunctional parameters and method for setting multifunctional parameters of the integrated circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410104517.5A CN104932602B (en) | 2014-03-19 | 2014-03-19 | Integrated circuit capable of setting multifunctional parameters and method for setting multifunctional parameters of the integrated circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104932602A CN104932602A (en) | 2015-09-23 |
| CN104932602B true CN104932602B (en) | 2017-04-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7106036B1 (en) * | 2004-06-30 | 2006-09-12 | National Semiconductor Corporation | Apparatus and method for high-frequency PWM with soft-start |
| WO2007120087A1 (en) * | 2006-04-19 | 2007-10-25 | Volvo Technology Corporation | Method for predicting an impact of an aging behaviour of an electrical element and simulation model for simulating such behaviour |
| US7827330B2 (en) * | 2007-07-27 | 2010-11-02 | Microchip Technology Incorporated | Configuring multi-bit slave addressing on a serial bus using a single external connection |
| TWI350656B (en) * | 2007-09-06 | 2011-10-11 | Faraday Tech Corp | Full digital soft-start circuit and power supply system applying the same |
| TWI411201B (en) * | 2010-04-28 | 2013-10-01 | Richtek Technology Corp | Parameter setting circuit and method for an integrated circuit |
| US8625313B2 (en) * | 2010-08-04 | 2014-01-07 | System General Corporation | High-side synchronous rectifier circuits and control circuits for power converters |
| CN203434850U (en) * | 2013-07-19 | 2014-02-12 | 力智电子股份有限公司 | Time generator of power converter |
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