CN106329929B - Voltage conversion circuit and voltage conversion controller - Google Patents
Voltage conversion circuit and voltage conversion controller Download PDFInfo
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- CN106329929B CN106329929B CN201510383672.XA CN201510383672A CN106329929B CN 106329929 B CN106329929 B CN 106329929B CN 201510383672 A CN201510383672 A CN 201510383672A CN 106329929 B CN106329929 B CN 106329929B
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Abstract
The present invention proposes a kind of voltage conversion circuit, the power switch in a power stage circuit is controlled with a voltage conversion controller, an input voltage is converted to an output voltage, and pass through a photo-coupler, sense the output voltage, the voltage conversion controller includes: a multifunctional pins, with external parameter setting element and the photo-coupler；And one parameter sample setup unit, to provide two different default voltages, sensing is by two corresponding current values on the multifunctional pins respectively, and wherein the two corresponding currents value is relevant to the resistance value of the parameter setting element；Or parameter sampling setup unit provides two different default electric currents, senses two corresponding voltage values on the multifunctional pins respectively, wherein the two corresponding voltages value is relevant to the resistance value of the parameter setting element.The parameter samples setup unit according to two default voltage and the two corresponding currents value or according to the two default electric current and the two corresponding voltages value, to set the parameter value of the voltage conversion controller.
Description
Technical field
The present invention relates to a kind of voltage conversion circuits, reach parameter especially by the resistance for being coupled to photo-coupler
Setting, to reduce a kind of voltage conversion circuit of required pin.
Background technique
Fig. 1 shows a kind of 10 schematic diagram of voltage conversion circuit of the prior art, controls formula (Flyback for a flyback
Control) voltage conversion circuit, it includes corresponding voltage conversion controller 11 and voltage conversion units 12.Because in electricity
It presses in converting unit 12, the primary side and secondary side of transformer are mutually isolated, therefore in order to pass the relevent information of output voltage
The voltage conversion controller 11 for returning to transformer primary side, by the way of optical coupling, with the light-emitting component in photo-coupler
13a transmits output voltage relevent information in a manner of light signal, then is received and defeated with the photosensitive element 13b in photo-coupler
Enter voltage conversion controller 11.
Due to voltage conversion controller 11 be usually integrated circuit and pin Limited Number, if can use same
A pin reaches a variety of different functions, so that it may provide more functions now in limited pin count, or reduce envelope
Dress up this.
The prior art related with the present patent application sees United States Patent (USP) US 723313, United States Patent (USP) US 2015/
0023071, United States Patent (USP) US 8704590, United States Patent (USP) US 7764521.
In view of above-mentioned, the present invention proposes a kind of voltage conversion circuit and its relevant voltage conversion controller, with
In the limited situation of pin number, a variety of different functions are reached using the same pin.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art and defect, a kind of voltage conversion circuit and voltage are proposed
Switching controller can reach a variety of different functions using the same pin in the limited situation of pin number.
In order to achieve the above object, saying that the present invention provides a kind of voltage conversion circuits, include: a function with regard to one of viewpoint
One input voltage is converted to an output voltage by the switching of a wherein power switch by rate grade circuit；One photo-coupler is used
To sense the output voltage；One parameter setting element；And a voltage conversion controller, to control the power switch, the electricity
Pressure switching controller includes: a multifunctional pins, to the external parameter setting element and the photo-coupler；And one parameter take
Sample setup unit, to provide two different default voltages, sensed respectively through two corresponding currents on the multifunctional pins
Value, the parameter sample setup unit according to two default voltage and the two corresponding currents value, to set the voltage conversion and control
The parameter value of device, wherein the two corresponding currents value is relevant to the resistance value of the parameter setting element；Or parameter sampling setting is single
Member provides two different default electric currents, to sense two corresponding voltage values on the multifunctional pins, parameter sampling setting respectively
Unit is according to the two default electric current and the two corresponding voltages value, to set the parameter value of the voltage conversion controller, wherein should
Two corresponding voltage values are relevant to the resistance value of the parameter setting element, as a result, can be by setting the difference of the parameter setting element
Resistance value, to set the different parameter values.
In order to achieve the above object, saying that the present invention provides a kind of voltage conversion controllers, to control one with regard to another viewpoint
Voltage conversion circuit senses the output voltage an input voltage is converted to an output voltage, and by a photo-coupler, should
Voltage conversion controller includes: a multifunctional pins, to external parameter setting element and the photo-coupler；An and parameter
Setup unit is sampled, to provide two different default voltages, sensed respectively through two corresponding electricity on the multifunctional pins
Flow valuve, the parameter sample setup unit according to two default voltage and the two corresponding currents value, to set voltage conversion control
The parameter value of device processed, wherein the two corresponding currents value is relevant to the resistance value of the parameter setting element；Or parameter sampling setting
Unit provides two different default electric currents, and to sense two corresponding voltage values on the multifunctional pins respectively, parameter sampling is set
Order member is according to the two default electric current and the two corresponding voltages value, to set the parameter value of the voltage conversion controller, wherein
The two corresponding voltages value is relevant to the resistance value of the parameter setting element, as a result, can be by setting the parameter setting element not
Same resistance value, to set the different parameter values.
In a kind of wherein preferred embodiment, which is a resistance.
In a kind of wherein preferred embodiment, which includes a photosensitive element, and parameter sampling setting is single
Member provides two default voltage, and sensed respectively through the two corresponding currents value on the multifunctional pins, wherein the parameter is set
Determine element and the photosensitive element is coupled to one end of the parameter setting element, and this end is coupled to the multifunctional pins.
In a kind of wherein preferred embodiment, which includes a photosensitive element, and parameter sampling setting is single
Member provides the two defaults electric current, and to sense the two corresponding voltages value on the multifunctional pins respectively, wherein the photosensitive element is passed through
The multifunctional pins are coupled to by the parameter setting element.
In a kind of wherein preferred embodiment, parameter sampling setup unit provides two default voltage, to feel respectively
It surveys through the two corresponding currents value on the multifunctional pins, parameter sampling setup unit includes: Voltage to current transducer electricity
Two default voltage is converted to the two corresponding currents value by road；One current-to-voltage converting circuit converts the two corresponding currents value
For corresponding two voltage samplings value；One difference computational unit calculates the difference of the two voltage samplings value, to generate parameter setting news
Number, to set the parameter value.
In one of embodiment of above-described embodiment, which includes a sampling keeping unit and one
Addition and subtraction unit, the sampling keeping unit capture one of the two voltage samplings value, and the addition and subtraction unit is according to sampling keeping unit
Another voltage sampling value in the voltage sampling value and the two voltage samplings value captured, generate the two voltage samplings value it
Difference.
In one of embodiment of above-described embodiment, which further includes a counter, and counting should
The difference of two voltage sampling values is to generate the parameter setting signal.
In a kind of wherein preferred embodiment, parameter sampling setup unit provides the two defaults electric current, to feel respectively
The two corresponding voltages value on the multifunctional pins is surveyed, parameter sampling setup unit includes: an at least current source, to provide
The two defaults electric current, to generate the two corresponding voltages value on the multifunctional pins；And a difference computational unit, calculate this two
The difference of corresponding voltage value, to generate a parameter setting signal, to set the parameter value.
In one of embodiment of above-described embodiment, which includes a sampling keeping unit and one
Addition and subtraction unit, the sampling keeping unit capture one of the two corresponding voltages value, and the addition and subtraction unit is according to sampling keeping unit
The another pair in the corresponding voltage value and the two corresponding voltages value captured answers voltage value, generate the two voltage samplings value it
Difference.
In one of embodiment of above-described embodiment, which further includes a counting unit, counts
The difference of the two corresponding voltages value is to generate the parameter setting signal.
Below by way of specific embodiment elaborate, when be easier to understand the purpose of the present invention, technology contents, feature and its
The effect of reached.
Detailed description of the invention
Fig. 1 shows a kind of voltage conversion circuit schematic diagram of prior art；
Fig. 2-3 shows the voltage conversion circuit and voltage conversion controller schematic diagram of one embodiment of the invention；
Fig. 4-5 shows the voltage conversion circuit and voltage conversion controller schematic diagram of another embodiment of the present invention.
Symbol description in figure
10 voltage conversion circuits
11 voltage conversion controllers
12 voltage conversion units
20 voltage conversion circuits
21 voltage conversion controllers
211 parameters sample setup unit
2111 current-to-voltage converting circuits
2112 difference computational units
21121 addition and subtraction units
2113 voltage-current converter circuits
22 photo-couplers
221 photosensitive elements
222 light-emitting components
23 power stage circuits
Ccomp capacitor
COMP multifunctional pins
Count counter
EA1 error amplifier
GATE, CS pin
I1, I2 corresponding current value
Id electric current
Iset1, Iset2 default electric current
M1, M2 power switch
M3 transistor
R1 parameter setting element
Rg resistance
S/H sampling keeping unit
TA1, TA2 control signal
V1, V2 corresponding voltage value
△ V difference
Vc corresponding voltage
Vcomp voltage value
Vin input voltage
Vout output voltage
Vset1, Vset2 default voltage
Specific embodiment
Referring to figure 2., the voltage conversion circuit 20 for showing one embodiment of the invention, it includes parameter setting members
Part R1, a voltage conversion controller 21, a photo-coupler 22 and a power stage circuit 23.Parameter setting element R1 can be any
Element with resistance value；In the present embodiment, parameter setting element R1 is such as, but not limited to be a resistance.Voltage conversion and control
Input voltage vin is converted to output voltage Vout to control the power switch M2 in power stage circuit 23 by device.Optical coupling
Device 22 includes a photosensitive element 221 and a light-emitting component 222, to generate feedback signal relevant to output voltage Vout.
The operation mode of voltage conversion controller 21 includes an initial mode and a normal mode, and initial mode turns for setting voltage
The parameter value of changer controller 21, normal mode are used to control the voltage conversion of voltage conversion circuit 20.Voltage conversion controller 21
Include a multifunctional pins COMP and parameter sampling setup unit 211 (refering to Fig. 3,5).Multifunctional pins COMP is external in
Parameter setting element R1 and photo-coupler 22.In the embodiment of fig. 2, parameter setting element R1 is coupled to photosensitive element 221
One end of parameter setting element R1, and this end is coupled to multifunctional pins COMP.In addition, multifunctional pins COMP can be separately coupled to
One capacitor Ccomp, to provide the function that noise filtering is crossed in pressure stabilizing.
Corresponding to the embodiment of Fig. 2, Fig. 3 is please referred to.When voltage conversion controller 21 is in initial mode, parameter sampling is set
Order member 211 provides two different default voltages Vset1, Vset2 in multifunctional pins COMP, and is sensed respectively by multi-functional
Two corresponding current values I1, I2 on pin COMP, two corresponding current values I1, I2 correspond respectively to two default voltage Vset1,
Vset2 and the resistance value for being relevant to parameter setting element R1.Parameter sample setup unit 211 according to two default voltage Vset1,
Vset2 and two corresponding current values I1, I2, to set the parameter value of voltage conversion controller.
For example, in the present embodiment, parameter sampling setup unit 211 includes: a voltage-current converter circuit 2113,
One current-to-voltage converting circuit 2111 and a difference computational unit 2112.Voltage-current converter circuit 2113 is respectively according to two
Default voltage Vset1, Vset2 and generate two corresponding current values I1, I2, pass through multifunctional pins COMP.Current Voltage conversion electricity
Two corresponding current values I1, I2 are converted to voltage sampling value by road 2111.Difference computational unit 2112 calculates the two voltage samplings value
Difference, to generate a parameter setting signal, to set the parameter value of voltage conversion controller.
In detail, for example, voltage-current converter circuit 2113 is such as, but not limited to may include that error shown in Fig. 3 is put
An input terminal of big device EA1 and transistor M3, error amplifier EA1 receive default voltage Vset1 or Vset2, another input terminal
It is coupled to multifunctional pins COMP；The output end of error amplifier EA1 controls transistor M3, and the lower end of transistor M3 is also coupled to
In multifunctional pins COMP.In circuit feedback balance, two input terminal voltages of error amplifier EA1 are equal (not to consider element
Matching error), therefore the current potential of multifunctional pins COMP is equal to default voltage Vset1 or Vset2.Default voltage Vset1 or
Vset2 will be so that multifunctional pins COMP externally flows out electric current, this electric current can be diverted through parameter setting element R1 and photosensitive member
Part 221, wherein when default voltage is Vset1, is Vset1/R1 by the electric current of parameter setting element R1, passes through photosensitive member
The electric current of part 221 is Id, and I1=(Vset1/R1)+Id；Also, passing through parameter setting element R1 when default voltage is Vset2
Electric current be Vset2/R1, be Id by the electric current of photosensitive element 221, and I2=(Vset2/R1)+Id.Therefore, according to I1 with
The difference of I2 and the difference of default voltage Vset1 and Vset2, it can be seen that the resistance value of parameter setting element R1 is (still with R1 table
Show): R1=(Vset2-Vset1)/(I2-I1).That is, the different resistance of element R1 can be set by setup parameter
Value, to set different parameter values.
Known to as above-mentioned calculating formula it is found that because of default voltage Vset1 and Vset2 being, it is only necessary to obtain the difference of I1 and I2, just
It can know R1.But, since default voltage Vset1 and Vset2 are provided respectively at different time, it is therefore necessary to store it
One, it could subtract each other with another one.With analog circuit come when realizing, for the convenience calculated, I1 and I2 first can be converted into electricity
Pressure, with convenient sampling storage.So in the present embodiment, it includes current-to-voltage converting circuit that parameter, which samples setup unit 211,
2111, two corresponding current values I1, I2 are converted into voltage sampling value.Current-to-voltage converting circuit 2111 such as, but not limited to can
Include a current mirroring circuit and a resistance Rg, wherein current mirroring circuit is to replicate I1 or I2 and resistance Rg converts I1 or I2
For voltage sampling value.
Difference computational unit 2112 calculates the difference of the two voltage samplings value, to generate a parameter setting signal, to set
The parameter value of voltage conversion controller.In the present embodiment, difference computational unit 2112 includes a sampling keeping unit S/H and one
Addition and subtraction unit 21121, sampling keeping unit S/H two voltage sampling values of acquisition export a corresponding voltage Vc, addition and subtraction together
Unit 21121 is according to another voltage sampling value in corresponding voltage Vc and two voltage sampling values, to generate the difference of the two.It is real one
It applies in example, the output of addition and subtraction unit 21121 can be used as the parameter setting signal of simulation.In another embodiment, addition and subtraction
The output of unit 21121 can be counted via a counter count again, to generate the parameter setting signal of number.
The difference (Vset2-Vset1) of two default voltage Vset1, Vset2 above-mentioned is divided by two corresponding current values I1, I2
The purpose of difference (I1-I2) is to deduct the electric current Id for flowing through photosensitive element 221, although circuit just starts in initial mode,
It is not excluded for have on photosensitive element 221 dark current (dark current), and this dark current may cause calculating parameter setting
The error when resistance value of element R1.But when giving two default voltages Vset1, Vset2, so that it may eliminate the influence of electric current Id.
Referring to figure 4., 5, in another embodiment, photosensitive element 221 is coupled to multi-functional via parameter setting element R1
Pin COMP (that is, parameter setting element R1 is coupled between multifunctional pins COMP and photosensitive element 221).It converts and controls when voltage
Device 21 processed is in initial mode, and parameter sampling setup unit 211 provides two different default electric current Iset1, Iset2, through more function
Energy pin COMP outflow, to sense two corresponding voltage values V1, V2 on multifunctional pins COMP respectively (referring to multifunctional pins
The voltage value VCOMP, Fig. 5 of COMP), it is corresponding according to two default electric current Iset1, Iset2 and two that parameter samples setup unit 211
Voltage value V1, V2, to set the parameter value of voltage conversion controller 211.
For example, in Fig. 5 embodiment, parameter sampling setup unit 211 includes: at least a current source (is illustrated as two
Current source but equivalent can also change into single variable current source), to provide this two default electric current Iset1, Iset2, more
Two corresponding voltage values V1, V2 are generated on function pin COMP；And a difference computational unit 2112, to calculate the two corresponding electricity
The difference of pressure value V1, V2, to generate a parameter setting signal, to set the parameter value of voltage conversion controller.An at least electric current
Source provides the mode of two default electric current Iset1, Iset2, for example, can be by single variable current source, point mentions in different times
For two different electric currents, or, as shown, according to control signal TA1, TA2, and being mentioned in different times by two current sources
For two different electric currents.
In detail, when voltage conversion controller 21 is in initial mode, an at least current source provides two default electric currents
Iset1, Iset2 are flowed out through multifunctional pins COMP, to generate two corresponding voltage values V1, V2 on multifunctional pins.Wherein,
Two corresponding voltage values V1, V2 include the cross-pressure on cross-pressure and photosensitive element 221 on parameter setting element R1.When default electric current
When for Iset1, the cross-pressure on parameter setting element R1 is equal to V1- (cross-pressure on photosensitive element 221), i.e., (Iset1*R1)=
V1- (cross-pressure on photosensitive element 221)；Also, the cross-pressure on parameter setting element R1 is equal to V2- when defaulting electric current is Iset2
(cross-pressure on photosensitive element 221), i.e. (Iset2*R1)=V2- (cross-pressure on photosensitive element 221).Therefore, according to V1 and V2
Difference and default electric current Iset1 and Iset2 difference, it can be seen that the resistance value of parameter setting element R1 is (still with R1 table
Show): R1=(V2-V1)/(Iset2-Iset1).In above formula, the cross-pressure on photosensitive element 221 because being deducted, without causing shadow
It rings.That is, the different resistance values of element R1 can be set, by setup parameter to set different parameter values.
Difference computational unit 2112 calculates the difference of two corresponding voltages value V1, V2, to generate a parameter setting signal, to
Set the parameter value of voltage conversion controller.In the present embodiment, difference computational unit 2112 includes a sampling keeping unit S/H
With an addition and subtraction unit 21121, sampling keeping unit S/H two corresponding voltage values V1, V2 of acquisition export a corresponding voltage together
Vc, addition and subtraction unit 21121 is according to voltage sampling value another in corresponding voltage Vc and corresponding voltage value V1, V2, to generate two
The difference △ V of person.In one embodiment, the output of addition and subtraction unit 21121 can be used as the parameter setting signal of simulation.Another
In one embodiment, the output of addition and subtraction unit 21121 can be counted via a counter count again, to generate the ginseng of number
Number setting signal.
According to the present invention, the different resistance values that element R1 can be set by setup parameter, to voltage conversion controller 21
Different parameter values is set, and is not needed using to additional pin；Although in addition, multifunctional pins COMP also with photosensitive element
221 couplings, but electric current on photosensitive element 221 or cross-pressure will not impact parameter setting.
Illustrate the present invention for preferred embodiment above, it is described above, only it is easy to those skilled in the art
Solve the contents of the present invention, interest field not for the purpose of limiting the invention.Under same spirit of the invention, those skilled in the art
Member can think and various equivalence changes.For example, can change can power transformation to be capable of providing the single of two or more electric currents for two current sources
Stream source；Current mirroring circuit in current-to-voltage converting circuit can change the current mirroring circuit for other forms；It is shown in embodiment
Show between two circuits or element being directly connected to, other circuits or element for influencing major function can be planted not, such as switch, news
Number amplifying circuit, level translation circuit, analog-to-digital conversion circuit, D/A conversion circuit, buffering circuit etc.；To simulate electricity
The circuit that road is realized can change and be realized with digital circuit；Etc..All this kind, according to the present invention can all teach and analogize and obtain,
Therefore, the scope of the present invention should cover above-mentioned and other all equivalence changes.
Claims (17)
1. a kind of voltage conversion circuit, which is characterized in that it includes:
One input voltage is converted to an output voltage by the switching of a wherein power switch by one power stage circuit；
One photo-coupler, to sense the output voltage；
One parameter setting element；And
One voltage conversion controller, to control the power switch, which includes:
One multifunctional pins, to the external parameter setting element and the photo-coupler；And
One parameter samples setup unit, to provide two different default voltages, sensed respectively by the multifunctional pins
Two corresponding current values, which samples setup unit according to two default voltage and the two corresponding currents value, should with setting
The parameter value of voltage conversion controller, wherein the two corresponding currents value is relevant to the resistance value of the parameter setting element；Or the ginseng
Number sampling setup unit provides two different default electric currents should to sense two corresponding voltage values on the multifunctional pins respectively
Parameter samples setup unit according to the two default electric current and the two corresponding voltages value, to set the ginseng of the voltage conversion controller
Numerical value, wherein the two corresponding voltages value is relevant to the resistance value of the parameter setting element,
It as a result, can be by setting the different resistance values of the parameter setting element, to set the different parameter values.
2. voltage conversion circuit as described in claim 1, wherein the parameter setting element is a resistance.
3. voltage conversion circuit as described in claim 1, wherein the photo-coupler includes a photosensitive element, and the parameter takes
Sample setup unit provides two default voltage, sensed respectively through the two corresponding currents value on the multifunctional pins, wherein
The parameter setting element and the photosensitive element are coupled to one end of the parameter setting element, and this end is coupled to the multifunctional access
Foot.
4. voltage conversion circuit as described in claim 1, wherein the photo-coupler includes a photosensitive element, and the parameter takes
Sample setup unit provides the two defaults electric current, to sense the two corresponding voltages value on the multifunctional pins, the wherein sense respectively
Optical element is coupled to the multifunctional pins via the parameter setting element.
5. voltage conversion circuit as described in claim 1, wherein parameter sampling setup unit provides two default voltage,
Sensed respectively through the two corresponding currents value on the multifunctional pins, parameter sampling setup unit includes:
Two default voltage is converted to the two corresponding currents value by one voltage-current converter circuit；
The two corresponding currents value is converted to corresponding two voltage samplings value by one current-to-voltage converting circuit；
One difference computational unit calculates the difference of the two voltage samplings value, to generate a parameter setting signal, to set the parameter
Value.
6. voltage conversion circuit as claimed in claim 5, wherein the difference computational unit includes a sampling keeping unit and one
Addition and subtraction unit, the sampling keeping unit capture one of the two voltage samplings value, and the addition and subtraction unit is according to sampling keeping unit
Another voltage sampling value in the voltage sampling value and the two voltage samplings value captured, generate the two voltage samplings value it
Difference.
7. voltage conversion circuit as claimed in claim 6, wherein the difference computational unit also includes a counter, and counting should
The difference of two voltage sampling values is to generate the parameter setting signal.
8. voltage conversion circuit as described in claim 1, wherein parameter sampling setup unit provides the two defaults electric current,
To sense the two corresponding voltages value on the multifunctional pins respectively, parameter sampling setup unit includes:
An at least current source, to provide the two defaults electric current, to generate the two corresponding voltages value on the multifunctional pins；With
And
One difference computational unit calculates the difference of the two corresponding voltages value, to generate a parameter setting signal, to set the parameter
Value.
9. voltage conversion circuit as claimed in claim 8, wherein the difference computational unit includes a sampling keeping unit and one
Addition and subtraction unit, the sampling keeping unit capture one of the two corresponding voltages value, and the addition and subtraction unit is according to sampling keeping unit
The another pair in the corresponding voltage value and the two corresponding voltages value captured answers voltage value, generate the two voltage samplings value it
Difference.
10. voltage conversion circuit as claimed in claim 9, wherein the difference computational unit also includes a counter, and counting should
The difference of two corresponding voltage values is to generate the parameter setting signal.
11. a kind of voltage conversion controller, to control a voltage conversion circuit so that an input voltage is converted to output electricity
Pressure, and by a photo-coupler, sense the output voltage, which is characterized in that the voltage conversion controller includes:
One multifunctional pins, to external parameter setting element and the photo-coupler；And
One parameter samples setup unit, to provide two different default voltages, sensed respectively by the multifunctional pins
Two corresponding current values, which samples setup unit according to two default voltage and the two corresponding currents value, should with setting
The parameter value of voltage conversion controller, wherein the two corresponding currents value is relevant to the resistance value of the parameter setting element；Or the ginseng
Number sampling setup unit provides two different default electric currents should to sense two corresponding voltage values on the multifunctional pins respectively
Parameter samples setup unit according to the two default electric current and the two corresponding voltages value, to set the ginseng of the voltage conversion controller
Numerical value, wherein the two corresponding voltages value is relevant to the resistance value of the parameter setting element,
It as a result, can be by setting the different resistance values of the parameter setting element, to set the different parameter values.
12. voltage conversion controller as claimed in claim 11, wherein parameter sampling setup unit provides the two defaults electricity
Pressure, sensed respectively through the two corresponding currents value on the multifunctional pins, parameter sampling setup unit includes:
Two default voltage is converted to the two corresponding currents value by one voltage-current converter circuit；
The two corresponding currents value is converted to corresponding two voltage samplings value by one current-to-voltage converting circuit；
One difference computational unit calculates the difference of the two voltage samplings value, to generate a parameter setting signal, to set the parameter
Value.
13. voltage conversion controller as claimed in claim 12, wherein the difference computational unit includes a sampling keeping unit
With an addition and subtraction unit, which captures one of the two voltage samplings value, which keeps according to sampling
Another voltage sampling value in the voltage sampling value and the two voltage samplings value that unit is captured, generates two voltage sampling
The difference of value.
14. voltage conversion controller as claimed in claim 13, wherein the difference computational unit also includes a counting unit,
The difference of the two voltage samplings value is counted to generate the parameter setting signal.
15. voltage conversion controller as claimed in claim 11, wherein parameter sampling setup unit provides the two defaults electricity
Stream, to sense the two corresponding voltages value on the multifunctional pins respectively, parameter sampling setup unit includes:
Two current sources, to provide the two defaults electric current respectively, to generate the two corresponding voltages value on the multifunctional pins；With
And
One difference computational unit calculates the difference of the two corresponding voltages value, to generate a parameter setting signal, to set the parameter
Value.
16. voltage conversion controller as claimed in claim 15, wherein the difference computational unit includes a sampling keeping unit
With an addition and subtraction unit, which captures one of the two corresponding voltages value, which keeps according to sampling
Another pair in the corresponding voltage value and the two corresponding voltages value that unit is captured answers voltage value, generates two voltage sampling
The difference of value.
17. voltage conversion controller as claimed in claim 16, wherein the difference computational unit also includes a counting unit,
The difference of the two corresponding voltages value is counted to generate the parameter setting signal.
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| TW201433070A (en) * | 2013-02-08 | 2014-08-16 | Richtek Technology Corp | Voltage converter circuit and voltage converter controller and parameter setting method therefor |
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| TWI285464B (en) * | 2004-07-02 | 2007-08-11 | Richtek Techohnology Corp | Circuit and method realizing multi-functional pin in pulse width modulation controller |
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2015
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107684A (en) * | 2011-11-15 | 2013-05-15 | 艾沃特有限公司 | Power Converter Controller IC Having Pins with Multiple Functions |
| CN103856058A (en) * | 2012-12-05 | 2014-06-11 | 立锜科技股份有限公司 | Voltage conversion circuit and voltage conversion controller |
| TW201433070A (en) * | 2013-02-08 | 2014-08-16 | Richtek Technology Corp | Voltage converter circuit and voltage converter controller and parameter setting method therefor |
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| CN106329929A (en) | 2017-01-11 |
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