CN109510484A - A kind of high voltage supply control system and method for chip - Google Patents
A kind of high voltage supply control system and method for chip Download PDFInfo
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- CN109510484A CN109510484A CN201811157580.XA CN201811157580A CN109510484A CN 109510484 A CN109510484 A CN 109510484A CN 201811157580 A CN201811157580 A CN 201811157580A CN 109510484 A CN109510484 A CN 109510484A
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- power
- value
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
- H02H7/1252—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers responsive to overvoltage in input or output, e.g. by load dump
Abstract
Present disclose provides a kind of high voltage supply control systems and method for chip.The high voltage supply control system includes: that supply voltage obtains module, is configured as obtaining the real-time voltage value for the high voltage supply voltage for chip power supply；Supply voltage comparison module is configured as the real-time voltage value of supply voltage being compared with scheduled supply voltage threshold value；And power switch pipe, it is configured as controlling the high voltage supply to chip, wherein: when the real-time voltage value of the comparison result of supply voltage comparison module instruction supply voltage is higher than supply voltage threshold value, power switch pipe turns off or reduces supply current in the case where meeting chip and working normally, to control the power supply interrupted or reduced to chip；And when the real-time voltage value of the comparison result of supply voltage comparison module instruction supply voltage is lower than supply voltage threshold value, supply current is opened or improved to power switch pipe, to control starting or reinforce the power supply to chip.
Description
Technical field
The present invention relates to chip fields, relate more specifically to a kind of high voltage supply control system and method for chip.
Background technique
High voltage supply technology is widely used to not homologous ray and provides stable supply voltage for chip.Fig. 1 is shown
A kind of schematic diagram of the exemplary system using high voltage supply.As shown, the exemplary system is using high-voltage suppling power
A kind of Switching Power Supply for Buck structure is powered.Input high-voltage ac power is connected to the rectification being made of four diodes
Two input terminals of bridge are then input by filtering again through capacitor C1 after rectifier bridge rectification by dotted line frame instruction
Switching Power Supply controls chip and provides stable supply voltage V to control chip for Switching Power SupplyDD。
In above-mentioned example system, the VDD control module quilt of the high voltage supply for control switch power supply control chip
It is integrated in Switching Power Supply control chip.Fig. 2 shows the rough schematic views of typical high voltage supply system, wherein using dotted line frame
Indicate typical high voltage supply control module, and other modules in the system or circuit have been omitted.As shown in Fig. 2, allusion quotation
The high voltage supply control module of type can be made of power switch pipe (such as technotron JFET) and voltage comparator, be led to
Cross JFET turn on and off control to Switching Power Supply control chip power supply.As chip power voltage VDDLower than chip power
Reference voltage VREFWhen, JFET is open-minded, to pass through input voltage VINFor chip charging；As chip power voltage VDDHigher than chip
Power source reference voltage VREFWhen, JFET shutdown, chip power voltage VDDIt is maintained by voltage regulation capacitor, so as to by core
Piece supply voltage VDDStablize in chip power reference voltage VREFPlace.
Fig. 3 is shown using chip power voltage V when above-mentioned typical high voltage supply control moduleDD, power switch pipe
The electric current I of JFETJFETWith drain voltage VHVWaveform schematic diagram.As shown, chip power voltage VDDStablize in chip electricity
Source reference voltage VREFPlace；The drain voltage V of JFETHVEqual to input voltage VIN, by certain frequency (such as power grid power frequency
Twice) change between minimum input voltage and maximum input voltage；IJFETFor the electric current for flowing through power switch pipe JFET, put down
Equal electric current is equal to chip operation electric current IIC, IJFET_MAXFor the maximum current that can flow through JFET.
Drain electrode and input voltage V due to power switch pipe JFETINCoupling, the JFET drain between source electrode at work
There are larger pressure drops, so existing on the JFET compared with lossy.It can be approximated to be by the loss of high voltage supply bring:
Especially with input voltage VINRaising, the loss on JFET also increases with it.The loss conversion of high pressure bring
For heat, the temperature that will lead to Switching Power Supply control chip is increased, and system effectiveness reduces.
Summary of the invention
In view of above-described one or more problems, the present invention provides a kind of high voltage supplies for chip to control system
System and method.
According to an aspect of the present invention, a kind of high voltage supply control system for chip is provided.The high voltage supply control
System processed includes: that supply voltage obtains module, is configured as obtaining the real-time electricity for the high voltage supply voltage for chip power supply
Pressure value；Supply voltage comparison module is configured as carrying out the real-time voltage value of supply voltage and scheduled supply voltage threshold value
Compare；And power switch pipe, it is configured as controlling the high voltage supply to chip, in which: when the ratio of supply voltage comparison module
When relatively result indicates that the real-time voltage value of supply voltage is higher than supply voltage threshold value, power switch pipe is meeting chip normal work
In the case where turn off or reduce supply current, interrupt or reduce power supply to chip to control；And when supply voltage compares mould
When the real-time voltage value of the comparison result instruction supply voltage of block is lower than supply voltage threshold value, confession is opened or improved to power switch pipe
Electric current, to control starting or reinforce the power supply to chip.
According to another aspect of the present invention, a kind of high voltage supply control method for chip is provided.The high voltage supply
Control method includes: the real-time voltage value obtained for the high voltage supply voltage for chip power supply；By the real-time electricity of supply voltage
Pressure value is compared with scheduled supply voltage threshold value；When the real-time voltage value of supply voltage is higher than supply voltage threshold value, use
Supply current is turned off or reduced in the case where meeting chip and working normally in the power switch pipe for controlling high voltage supply, with control
Interrupt or reduce the power supply to chip；And when the real-time voltage value of supply voltage is lower than supply voltage threshold value, power switch
Supply current is opened or improved to pipe, to control starting or reinforce the power supply to chip.
The high voltage supply control system and method for various aspects according to the present invention may be implemented merely with lower power supply
Voltage carries out segmented power supply to chip, so as to avoid power switch pipe from working under excessive supply voltage, drop
Low high voltage supply bring loss, reduces the temperature of chip, improves system effectiveness.
Detailed description of the invention
The present invention may be better understood from the description with reference to the accompanying drawing to a specific embodiment of the invention,
In:
Fig. 1 shows a kind of schematic diagram of exemplary system using high voltage supply；
Fig. 2 shows the rough schematic views of the high voltage supply system of the typical high voltage supply control module of application；
Chip power voltage V when Fig. 3 shows the typical high voltage supply control module in application drawing 2DD, power switch pipe
The electric current I of JFETJFETWith drain voltage VHVWaveform schematic diagram；
Fig. 4 shows the schematic of the high voltage supply system for chip of an exemplary embodiment according to the present invention
Block diagram；
Fig. 5 shows the high voltage supply using high voltage supply control system in accordance with an alternative illustrative embodiment of the present invention
The schematic block diagram of system；
Fig. 6 shows the simplification circuit diagram of the example high-pressure power supply system of Fig. 5；
Chip power voltage V when Fig. 7 A to 7C shows high voltage supply control system shown in application drawing 5 or Fig. 6DD, supply
The electric current I of electric switch pipe JFETJFETWith drain voltage VHVWaveform schematic diagram；
Fig. 8 shows the exemplary flow of the high voltage supply control method according to an embodiment of the invention for chip
Figure；
Fig. 9 shows the exemplary flow of the high voltage supply control method for chip according to another embodiment of the present invention
Figure；And
Figure 10 is shown can be using a kind of signal of high voltage supply system of high voltage supply control system according to the present invention
Figure.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below.In following detailed description
In, many details are proposed, in order to provide complete understanding of the present invention.But to those skilled in the art
It will be apparent that the present invention can be implemented in the case where not needing some details in these details.Below to implementation
The description of example is used for the purpose of providing by showing example of the invention and better understanding of the invention.The present invention never limits
In any concrete configuration set forth below, but cover under the premise of without departing from the spirit of the present invention element, component and
Any modification, replacement and the improvement of algorithm.In the the accompanying drawings and the following description, well known structure and technology is not shown, so as to
It avoids causing the present invention unnecessary fuzzy.
High voltage supply technology has been widely used in not homologous ray and provides stable supply voltage for chip.Utilize typical case
High voltage supply control mode, input high-voltage signal be applied on power switch pipe always, constantly charge, lead to chip
Causing power switch pipe, at work all there is biggish pressure drop in the most of the time, thus cause biggish loss.
Given this problem, the present invention provides a kind of new high voltage supply control systems.The high voltage supply control system can
To interrupt the power supply to chip when the real-time voltage value of supply voltage is increased above predetermined threshold, and in the reality of supply voltage
When voltage value restart the power supply to chip when decreasing below predetermined threshold, to realize merely with lower supply voltage pair
Chip carries out segmented power supply.It can work under excessive supply voltage to avoid power switch pipe in this way, to reduce
The loss of high voltage supply bring, reduces the temperature of chip, improves system effectiveness.
Fig. 4 shows the schematic frame of the high voltage supply system 400 according to an embodiment of the invention for chip
Figure.The high voltage supply system 400 includes high-voltage suppling power 410, high voltage supply control system 420 and chip 430.High pressure supplies
Power supply 410 for example receives the input ac voltage from power grid, which is rectified and filtered, to provide
Rectified and filtering supply voltage comes for the power supply of chip 430.High voltage supply control system 420 includes that supply voltage obtains module
421, it is configured as obtaining the real-time voltage value V of the high voltage supply voltage for powering for chip 430HV；Supply voltage compares mould
Block 422 is configured as the real-time voltage value V of supply voltageHVWith scheduled supply voltage threshold value VHV_THIt is compared；And
Power switch pipe 423 is configured as the comparison result control based on supply voltage comparison module 422 and supplies the high pressure of chip 430
Electricity.An exemplary embodiment of the present invention, in high voltage supply control system 420, when the ratio of supply voltage comparison module 422
The real-time voltage value V of relatively result instruction supply voltageHVHigher than supply voltage threshold value VHV_THWhen, power switch pipe 423 is meeting core
Piece turns off or reduces supply current to control interruption or reduce the power supply to chip 430 in the case where working normally；And works as and supply
The real-time voltage value V of the comparison result instruction supply voltage of piezoelectric voltage comparison module 422HVLower than supply voltage threshold value VHV_THWhen,
Supply current is opened or improved to power switch pipe 423 to control starting or reinforce the power supply to chip 430.
As shown in figure 4, high voltage supply control system 420 can be arranged on the outside of chip 430, however according to the present invention
Another embodiment, high voltage supply control system 420 can also be integrated in chip 430, so as to reduce control chip
Peripheral cost, reduction system volume.
As described above, power switch pipe 423 is only using the high voltage supply control system 420 of embodiment according to the present invention
In the real-time voltage value V of supply voltageHVLower than scheduled supply voltage threshold value VHV_THWhen just open or have biggish power supply
Electric current, and in the real-time voltage value V of supply voltageHVHigher than scheduled supply voltage threshold value VHV_THWhen be off or have
Lower supply current.Therefore, when power switch pipe 423 is opened, the pressure drop between source electrode and drain electrode remain at compared with
Low voltage level, using supply voltage charge chip when caused by be lost also just it is smaller.
Power switch pipe 423 turn on and off or the reduction of supply current and increase can be based on the realities of supply voltage
When voltage value controlled by multiple control modes.For example, Fig. 5 is shown using in accordance with an alternative illustrative embodiment of the present invention
High voltage supply control system high voltage supply system schematic block diagram, and Fig. 6 show the example high-pressure power supply system
The simplification circuit diagram of system.
In Fig. 6, with the high voltage supply control system of dotted line frame instruction property embodiment according to the example, and high voltage supply system
Other modules or circuit (such as the control chip of Switching Power Supply shown in Fig. 1 and Buck circuit) in system have been omitted.According to
High voltage supply control system of the invention can be used for controlling the high voltage supply to various chips, and the present invention is to confession to be controlled
The internal structure of the chip of electricity is with no restrictions.As shown in fig. 6, the power switch pipe for controlling high voltage supply may, for example, be knot
The drain electrode of type field effect transistor JFET, the JFET and supply voltage VHVIt is coupled, source electrode and chip power voltage VDDPhase coupling
Close, and its grid be used for comparable chip supply voltage VDDWith chip power reference voltage VREFComparator output phase coupling
It closes.
As shown in figure 5, the high voltage supply control system 420 of property embodiment according to the example further include: reference voltage setting
Module 424, for chip power reference voltage V to be arrangedREF；And chip power voltage comparison module 425, for chip is electric
Source voltage VDDWith chip power reference voltage VREFIt is compared.It is similar with typical high voltage supply system shown in Fig. 2, at this
In high voltage supply control system 420, when the comparison result of chip power voltage comparison module 425 indicates chip power voltage VDDIt is low
In chip power reference voltage VREFWhen, power switch pipe 423 is opened to allow to charge to chip 430 by supply voltage；
And when the comparison result of chip power voltage comparison module 425 indicates chip power voltage VDDHigher than chip power reference voltage
VREFWhen, power switch pipe 423 is turned off to suspend the charging to chip, so that chip power voltage VDDStablize in chip electricity
Source reference voltage VREFPlace.
Property embodiment according to the example, reference voltage setup module 424 are additionally configured to the first chip power of setting and refer to
Voltage VREF1With the second chip power reference voltage VREF2, wherein VREF1Higher than VREF2；When the ratio of supply voltage comparison module 422
The real-time voltage value V of relatively result instruction supply voltageHVIt is increased above supply voltage threshold value VHV_THWhen, mould is arranged in reference voltage
Block 424 selects the second chip power reference voltage VREF2To be set to chip power reference voltage VREF；And when power supply electricity
Press the real-time voltage value V of the comparison result instruction supply voltage of comparison module 422HVWhen decreasing below supply voltage threshold value, ginseng
It examines voltage setup module 424 and selects the first chip power reference voltage VREF1To be set to chip power reference voltage VREF。
Compared with typical high voltage supply control system, in Fig. 5 and example high-pressure electric power supply control system shown in fig. 6
In, increase the voltage value V to supply voltageHVReal-time acquisition, and the real-time voltage value according to supply voltage collected
VHVTo chip power reference voltage VREFControl.
The real-time voltage value V of supply voltageHVIt can be obtained in several ways by chip 430.For example, chip 430 can be with
Obtain the real-time voltage value V that can characterize supply voltageHVA certain signal live signal value, and based on the acquired letter
Number live signal value be calculated the real-time voltage value V of supply voltageHV.For example, can be by obtaining about input voltage
Between the information of the duty ratio of electric resistance partial pressure, chip current sampling foot voltage, auxiliary winding voltage, driving switch control signal etc. is come
It connects to obtain the real-time voltage value V of supply voltageHV。
Chip power voltage V when Fig. 7 A-7C shows high voltage supply control system shown in application drawing 5 or Fig. 6DD, supply
The electric current I of electric switch pipe JFETJFETWith drain voltage VHVWaveform schematic diagram.The control of the high voltage supply shown in Fig. 6 system
In system, the real-time voltage value V of supply voltageHVAs input voltage VINReal-time voltage value, that is, power switch pipe JFET
Drain voltage VHVReal-time voltage value.
As shown in Figure 7 A, as the real-time voltage value V of supply voltageHVIt is increased above VHV_THWhen, chip power reference voltage
VREFIt is arranged to lower VREF2.Chip power voltage V at this timeDDHigher than chip power reference voltage VREF2, lead to power switch
Pipe JFET shutdown, to interrupt the high voltage supply to chip.Then, chip power voltage VDDIt is maintained by electric capacity of voltage regulation C2, directly
To chip power voltage VDDIt is reduced to VREF2JFET task again afterwards.On the other hand, as the real-time voltage value V of supply voltageHVDrop
Down to lower than VHV_THWhen, chip power reference voltage VREFIt is arranged to higher VREF1.Chip power voltage V at this timeDDLower than core
Piece power source reference voltage VREF1, cause power switch pipe JFET open-minded, to be again started up the power supply to chip.
As can be seen that the high voltage supply using an exemplary embodiment of the present invention controls from the waveform diagram in Fig. 7 A
System will interrupt when the real-time voltage value of supply voltage is excessive or reduce the power supply to chip, and in the real-time of supply voltage
Voltage value restarts or reinforces the power supply to chip when being reduced to lower value, to realize merely with lower supply voltage to core
Piece carries out segmented power supply.In this way, power switch pipe JFET is only applied lesser voltage when opening, power switch is avoided
Pipe JFET works under excessive supply voltage, to reduce the loss of high voltage supply bring, reduces the temperature of chip, mentions
High system effectiveness.
In various exemplary embodiments of the invention, different supply voltage threshold values can be set according to actual needs
VHV_TH, the first chip power reference voltage VREF1With the second chip power reference voltage VREF2.For example, supply voltage can be based on
Virtual value adjust supply voltage threshold value VHV_TH, and the first core appropriate can be set based on the actual operating conditions of chip
Piece power source reference voltage VREF1With the second chip power reference voltage VREF2。
In view of the V of actual settingHV_TH、VREF1、VREF2May be different, JFET supply current ability may be different, Yi Jixin
The V of piece power supplyDDElectric capacity of voltage regulation size may also be different, chip power voltage VDDAlso it will appear and be often higher than VREF2Or often it is lower than VREF1
The case where, as shown in Fig. 7 B and Fig. 7 C.These situations belong to the normal of high voltage supply control system work according to the present invention
Situation.
Fig. 8 shows the signal of the high voltage supply control method 800 according to an embodiment of the invention for chip
Flow chart.The high voltage supply control method 800 may include step S810 to S840.
At S810, the available real-time voltage value for the high voltage supply voltage for chip power supply.
The real-time voltage value of supply voltage can be acquired in several ways.For example, available can characterize power supply
The live signal value of a certain signal of the real-time voltage value of voltage, and by the live signal value of the acquired signal come based on
Calculation obtains the real-time voltage value of supply voltage.For example, can be sampled by obtaining about input voltage electric resistance partial pressure, chip current
The information of the duty ratio of foot voltage, auxiliary winding voltage, driving switch control signal etc. to obtain the real-time of supply voltage indirectly
Voltage value.
At S820, the real-time voltage value of supply voltage is compared with scheduled supply voltage threshold value.
It can be set according to actual needs different supply voltage threshold values.For example, can be based on the virtual value of supply voltage
Adjust supply voltage threshold value.
When the real-time voltage value of supply voltage is higher than supply voltage threshold value, at S830, for controlling high voltage supply
Power switch pipe turns off or reduces supply current in the case where meeting chip and working normally, and is interrupted or is reduced to chip with control
Power supply.
When the real-time voltage value of supply voltage is lower than supply voltage threshold value, at S840, for controlling high voltage supply
Supply current is opened or improved to power switch pipe, to control starting or reinforce the power supply to chip.
High voltage supply control method 800 according to the present invention may be implemented to carry out chip merely with lower supply voltage
Segmented power supply, works under excessive supply voltage so as to avoid power switch pipe JFET, can reduce high pressure confession
Electric bring loss, reduces the temperature of chip, improves system effectiveness.
Fig. 9 shows the signal of the high voltage supply control method 900 for chip according to another embodiment of the present invention
Flow chart.According to the present invention, for control high voltage supply power switch pipe turn on and off or the reduction of supply current
It can be controlled based on the real-time voltage value of supply voltage by multiple control modes with improving.For example, in the high pressure shown in Fig. 9
In method for controlling power supply 900, by the way that different chip power reference voltages is arranged based on the real-time voltage value of supply voltage
Mode realizes the control turned on and off to power switch pipe.
The high voltage supply control method 900 includes step S910 to S980, and wherein step S920 and S930 are corresponded respectively to
Step S810 and S820 in high voltage supply control method 800 shown in fig. 8.
At S910, the first chip power reference voltage and the second chip power reference voltage are set, wherein the first chip
Power source reference voltage is higher than the second chip power reference voltage.
At S920, the real-time voltage value for the high voltage supply voltage for chip power supply is obtained.
At S930, the real-time voltage value of supply voltage is compared with scheduled supply voltage threshold value.
When the real-time voltage value of supply voltage is higher than supply voltage threshold value, at S940, the second chip power ginseng is selected
Voltage is examined as chip power reference voltage.
When the real-time voltage value of supply voltage is lower than supply voltage threshold value, at S950, the first chip power ginseng is selected
Voltage is examined as chip power reference voltage.
At S960, chip power voltage is compared with chip power reference voltage.
When chip power voltage is lower than chip power reference voltage, at S970, for controlling the power supply of high voltage supply
Switching tube is open-minded, to allow to charge to chip by supply voltage.
When chip power voltage is higher than chip power reference voltage, at S980, for controlling the power supply of high voltage supply
Switching tube shutdown, to suspend the charging to chip.
Chip power voltage can be stablized and be joined in the first chip power by high voltage supply control method 900 according to the present invention
It examines between voltage and the second chip power reference voltage, and may be implemented to divide chip merely with lower supply voltage
Segmentation power supply, to reduce the loss of high voltage supply bring.
It should be noted that each step in above-mentioned high voltage supply control method 800 and 900 only indicates high voltage supply control
Module in the system corresponding actions to be executed, these steps do not need to execute by sequence shown in figure, can also be according to it
He suitably sequentially executes or is performed in parallel, and can be deleted or be merged according to the actual situation.
In addition, the supply voltage of chip is rectified and filtering input high pressure in exemplary embodiment before
AC power supplies voltage, but high voltage supply control system according to the present invention and method, which are not limited to power switch pipe, is connected to chip
Input voltage the case where, be equally applicable to the case where power switch pipe connects the supply voltage at other high voltage nodes.For example,
In the high voltage supply system for the Switching Power Supply control chip of Buck-boost structure as shown in Figure 10, high voltage supply control
Molding block may be coupled to the output capacitance C in Buck-boost circuitOPositive end node at voltage.In this case,
Output capacitance COPositive end node at voltage be various exemplary embodiments according to the present invention above-mentioned supply voltage.
" one embodiment ", " another embodiment ", " another embodiment " is mentioned above, it should be understood, however, that each
The feature referred in embodiment might not can be only applied to the embodiment, but be possibly used for other embodiments.One implementation
Feature in example can be applied to another embodiment, or can be included in another embodiment.
The ordinal numbers such as " first ", " second " ... have been mentioned above.Although it is understood that these statements are just for the sake of narration
With the convenience of reference, defined by object and there is no the precedence relationships on order.
The present invention can realize in other specific forms, without departing from its spirit and essential characteristics.For example, particular implementation
Algorithm described in example can be modified, and system architecture is without departing from essence spirit of the invention.Therefore, currently
Embodiment be all counted as being exemplary rather than in all respects it is limited, the scope of the present invention by appended claims rather than
Foregoing description definition, also, the meaning of claim and whole changes in the range of equivalent are fallen into all be included in
Among the scope of the present invention.
Claims (16)
1. a kind of high voltage supply control system for chip, comprising:
Supply voltage obtains module, is configured as obtaining the real-time voltage for the high voltage supply voltage for chip power supply
Value；
Supply voltage comparison module, be configured as by the real-time voltage value of the supply voltage and scheduled supply voltage threshold value into
Row compares；And
Power switch pipe is configured as controlling the high voltage supply to the chip, in which:
When the comparison result of the supply voltage comparison module indicates that the real-time voltage value of the supply voltage is higher than the power supply
When voltage threshold, the power switch pipe turns off in the case where meeting the normal work of the chip or reduces supply current,
To control the power supply interrupted or reduced to the chip；And
When the comparison result of the supply voltage comparison module indicates the real-time voltage value of the supply voltage lower than the power supply
When voltage threshold, supply current is opened or improved to the power switch pipe, to control starting or reinforce the power supply to the chip.
2. high voltage supply control system according to claim 1, further includes:
Reference voltage setup module is configured as setting chip power reference voltage；And
Chip power voltage comparison module is configured as comparing chip power voltage and the chip power reference voltage
Compared with,
Wherein, when the comparison result of the chip power voltage comparison module indicates that the chip power voltage is lower than the chip
When power source reference voltage, the power switch pipe is opened to allow to charge to the chip by the supply voltage；And
And
When the comparison result of the chip power voltage comparison module indicates that the chip power voltage is higher than the chip power
When reference voltage, the power switch pipe shutdown is to suspend the charging to the chip.
3. high voltage supply control system according to claim 2, wherein the reference voltage setup module is also configured to
First chip power reference voltage and the second chip power reference voltage are set, wherein first chip power is with reference to electricity
Pressure is higher than the second chip power reference voltage；
When the comparison result of the supply voltage comparison module indicates that the real-time voltage value of the supply voltage is higher than the power supply
When voltage threshold, select the second chip power reference voltage as the chip power reference voltage；And
When the comparison result of the supply voltage comparison module indicates the real-time voltage value of the supply voltage lower than the power supply
When voltage threshold, select the first chip power reference voltage as the chip power reference voltage.
4. high voltage supply control system according to claim 1 is additionally configured to wherein the supply voltage obtains module
Obtain the live signal value for characterizing the signal of real-time voltage value of the supply voltage, and the reality of the signal based on the acquisition
When signal value obtain the real-time voltage value of the supply voltage.
5. high voltage supply control system according to claim 1, wherein the supply voltage includes being coupled to the chip
Input voltage or high voltage nodes for powering for the chip at supply voltage.
6. high voltage supply control system according to any one of claim 1 to 5 further includes that supply voltage threshold value adjusts mould
Block is configured as the virtual value based on the supply voltage and adjusts the scheduled supply voltage threshold value.
7. high voltage supply control system according to claim 1, wherein the power switch pipe is junction field effect transistor
Pipe JFET, and the drain electrode of the JFET is coupled with the supply voltage.
8. high voltage supply control system according to claim 2 or 3, wherein the power switch pipe is junction field crystalline substance
Body pipe JFET, the drain electrode of the JFET are coupled with the supply voltage, the source electrode of the JFET and the chip power voltage
It is coupled, and the grid of the JFET and the output of the chip power voltage comparison module are coupled.
9. a kind of high voltage supply control method for chip, comprising:
Obtain the real-time voltage value for the high voltage supply voltage for chip power supply；
The real-time voltage value of the supply voltage is compared with scheduled supply voltage threshold value；
When the real-time voltage value of the supply voltage is higher than the supply voltage threshold value, the confession for controlling high voltage supply is established by cable
It closes pipe and supply current is turned off or reduced in the case where meeting the normal work of the chip, interrupted or reduced to described with control
The power supply of chip；And
When the real-time voltage value of the supply voltage is lower than the supply voltage threshold value, the power switch pipe is opened or is improved
Supply current, to control starting or reinforce the power supply to the chip.
10. high voltage supply control method according to claim 9, further includes:
Chip power reference voltage is set；
When chip power voltage is lower than the chip power reference voltage, the power switch pipe is open-minded, to allow to pass through institute
Supply voltage is stated to charge to the chip；And
When the chip power voltage is higher than the chip power reference voltage, the power switch pipe shutdown, with pause pair
The charging of the chip.
11. high voltage supply control method according to claim 10, further includes:
First chip power reference voltage and the second chip power reference voltage are set, wherein first chip power is with reference to electricity
Pressure is higher than the second chip power reference voltage；
When the real-time voltage value of the supply voltage is higher than the supply voltage threshold value, the second chip power reference is selected
Voltage is as the chip power reference voltage；And
When the real-time voltage value of the supply voltage is lower than the supply voltage threshold value, the first chip power reference is selected
Voltage is as the chip power reference voltage.
12. high voltage supply control method according to claim 9, wherein obtaining for being supplied for the high pressure of chip power supply
The real-time voltage value of piezoelectric voltage includes the live signal value of the signal for the real-time voltage value that acquisition characterizes the supply voltage, and
The real-time voltage value of the supply voltage is obtained based on the live signal value of the signal of the acquisition.
13. high voltage supply control method according to claim 9, wherein the supply voltage includes being coupled to the chip
Input voltage or high voltage nodes for powering for the chip at supply voltage.
14. the high voltage supply control method according to any one of claim 9 to 13, further includes:
Virtual value based on the supply voltage adjusts the scheduled supply voltage threshold value.
15. high voltage supply control method according to claim 9, wherein the power switch pipe is junction field effect transistor
Pipe JFET, and the drain electrode of the JFET is coupled with the supply voltage.
16. high voltage supply control method described in 0 or 11 according to claim 1, wherein the power switch pipe is junction type field effect
Transistor JFET is answered, the drain electrode of the JFET is coupled with the supply voltage, the source electrode of the JFET and the chip power
Voltage is coupled, and the grid of the JFET chip power voltage and chip power reference voltage compared with being used for
The output of comparator be coupled.
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| CN201811157580.XA CN109510484B (en) | 2018-09-30 | 2018-09-30 | High-voltage power supply control system and method for chip |
| TW107140649A TWI689805B (en) | 2018-09-30 | 2018-11-15 | High-voltage power supply control system and method for wafer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110535329A (en) * | 2019-08-29 | 2019-12-03 | 昂宝电子（上海）有限公司 | System and method for reducing the loss of power of supply convertor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101346865A (en) * | 2006-06-06 | 2009-01-14 | 株式会社理光 | Excess voltage protection circuit, method of protecting a circuit from excess voltage, and semiconductor apparatus having the excess voltage protection ciruit |
| US20110241734A1 (en) * | 2010-04-05 | 2011-10-06 | Intersil Americas Inc. | Coupling tolerant precision current reference with high psrr |
| CN104124878A (en) * | 2014-07-23 | 2014-10-29 | 上海晶丰明源半导体有限公司 | Power supply module, switch power supply chip and switch power supply system |
| CN105245120A (en) * | 2015-10-23 | 2016-01-13 | 深圳市稳先微电子有限公司 | AC-DC single-stage control chip and control system thereof |
| CN106655747A (en) * | 2016-11-22 | 2017-05-10 | 上海晶丰明源半导体股份有限公司 | Power supply circuit, switching power supply system and power supply method of switching power supply system |
| CN107809830A (en) * | 2017-12-06 | 2018-03-16 | 无锡恒芯微科技有限公司 | A kind of Buck boost LED drive circuits |
| CN108233686A (en) * | 2018-03-09 | 2018-06-29 | 深圳深爱半导体股份有限公司 | It is integrated with the power management integrated circuit and electric power controller of power switch pipe |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7466115B2 (en) * | 2005-09-19 | 2008-12-16 | Texas Instruments Incorporated | Soft-start circuit and method for power-up of an amplifier circuit |
| TWI436593B (en) * | 2010-06-25 | 2014-05-01 | On Bright Electronics Shanghai | High-precision oscillator systems with feed forward compensation for ccfl driver systems and methods thereof |
| US8643351B2 (en) * | 2011-12-28 | 2014-02-04 | Monolithic Power Systems, Inc. | Switching mode power supply and the method thereof |
-
2018
- 2018-09-30 CN CN201811157580.XA patent/CN109510484B/en active Active
- 2018-11-15 TW TW107140649A patent/TWI689805B/en active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101346865A (en) * | 2006-06-06 | 2009-01-14 | 株式会社理光 | Excess voltage protection circuit, method of protecting a circuit from excess voltage, and semiconductor apparatus having the excess voltage protection ciruit |
| US20110241734A1 (en) * | 2010-04-05 | 2011-10-06 | Intersil Americas Inc. | Coupling tolerant precision current reference with high psrr |
| CN104124878A (en) * | 2014-07-23 | 2014-10-29 | 上海晶丰明源半导体有限公司 | Power supply module, switch power supply chip and switch power supply system |
| CN105245120A (en) * | 2015-10-23 | 2016-01-13 | 深圳市稳先微电子有限公司 | AC-DC single-stage control chip and control system thereof |
| CN106655747A (en) * | 2016-11-22 | 2017-05-10 | 上海晶丰明源半导体股份有限公司 | Power supply circuit, switching power supply system and power supply method of switching power supply system |
| CN107809830A (en) * | 2017-12-06 | 2018-03-16 | 无锡恒芯微科技有限公司 | A kind of Buck boost LED drive circuits |
| CN108233686A (en) * | 2018-03-09 | 2018-06-29 | 深圳深爱半导体股份有限公司 | It is integrated with the power management integrated circuit and electric power controller of power switch pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110535329A (en) * | 2019-08-29 | 2019-12-03 | 昂宝电子（上海）有限公司 | System and method for reducing the loss of power of supply convertor |
| US11532983B2 (en) | 2019-08-29 | 2022-12-20 | On-Bright Electronics (Shanghai) Co., Ltd. | Systems and methods for reducing power loss of power converters |
Also Published As
| Publication number | Publication date |
|---|---|
| TW202014825A (en) | 2020-04-16 |
| CN109510484B (en) | 2021-11-30 |
| TWI689805B (en) | 2020-04-01 |
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