CN113922668A - Single-event transient reinforcing circuit and method applied to DC-DC converter - Google Patents
Single-event transient reinforcing circuit and method applied to DC-DC converter Download PDFInfo
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- CN113922668A CN113922668A CN202111043509.0A CN202111043509A CN113922668A CN 113922668 A CN113922668 A CN 113922668A CN 202111043509 A CN202111043509 A CN 202111043509A CN 113922668 A CN113922668 A CN 113922668A
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- 230000001052 transient effect Effects 0.000 title claims abstract description 39
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005070 sampling Methods 0.000 claims abstract description 38
- 238000007599 discharging Methods 0.000 claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 230000002787 reinforcement Effects 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 7
- 238000010849 ion bombardment Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 7
- 238000011084 recovery Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Classifications
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
- H02M3/157—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators with digital control
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a single-event transient reinforcing circuit applied to a DC-DC converter, which comprises an OTA, wherein the forward end of the OTA is sequentially connected with a sampling capacitor CSSampling switch S1The reverse end of the OTA is connected with the output end of the EA, and the output of the OTA is connected with the charging and discharging bias current circuit. The invention discloses a method for reinforcing single-event transient by adopting a single-event transient reinforcing circuit applied to a DC-DC converter, which solves the problem that EA output node in a voltage loop of the DC-DC converter is influenced by ASET to cause output voltage VOUTIncrease of ripple voltage or output voltage VOUTThe problem of fluctuations.
Description
Technical Field
The invention belongs to the technical field of irradiation resistance reinforcement of a switching power supply, relates to a single-particle transient reinforcement circuit applied to a DC-DC converter, and further relates to a method for performing transient reinforcement by adopting the reinforcement circuit.
Background
DC-DC converters play a crucial role in the power system of aerospace power systems. DC-DC converters are commonly used to generate a regulated DC output voltage with high power efficiency from a DC input source, and any variation in the output voltage caused by irradiation may affect the operation of other circuits powered by the converter.
With the development of deep submicron technology, the failure rate caused by Single Event Transient (SET) is greatly improved. SET has attracted a high attention. At present, the radiation-resistant reinforcing technology of the process and the radiation-resistant reinforcing technology of the digital integrated circuit are mainly focused in the research field of the radiation-resistant integrated circuit for aerospace in China, and the research on the radiation-resistant analog integrated circuit is less.
An Error Amplifier (EA) is used as one of the core modules of the voltage loop of the DC-DC converter to feed back the voltage VFBAnd a reference voltage VREFThe difference is amplified and the output is used as the input signal of the inverting terminal of the PWM comparator, as shown in fig. 1. Meanwhile, the EA provides enough gain for the loop, and the accuracy of feedback regulation is guaranteed. When heavy ions or high-energy electrons bombard an output node of the EA and trigger an Analog Single-particle Transient (ASET) pulse, the node can generate large Transient voltage change, and a large capacitor C of the frequency compensation moduleCThe recovery is slow, the PWM outputs wide and narrow pulses, the duty ratio D is changed, and the output voltage V is causedOUTRipple voltage increase or output voltage VOUTLarge fluctuations occur.
The reinforcing effect of the traditional layout-level or process-level reinforcing scheme cannot provide good reliability evaluation during circuit-level design, great trouble is brought to the circuit design, and the irradiation resistance of the circuit needs to be evaluated by introducing the reinforcing scheme from the circuit level urgently at present.
Disclosure of Invention
The invention aims to provide a single-event transient reinforcing circuit applied to a DC-DC converter, which solves the problem that an EA output node in a voltage loop of the DC-DC converter causes an output voltage V due to the influence of ASETOUTIncrease of ripple voltage or output voltage VOUTThe problem of fluctuations.
The invention also provides a single-event transient reinforcing method of the single-event transient reinforcing circuit applied to the DC-DC converter.
The first technical scheme adopted by the invention is that the single-event transient reinforcing circuit applied to the DC-DC converter comprises an OTA, wherein the positive end of the OTA is sequentially connected with a sampling capacitor CSSampling switch S1The reverse end of the OTA is connected with the output end of the EA, and the output of the OTA is connected with the charging and discharging bias current circuit.
The first technical scheme of the invention is also characterized in that:
sampling switch S1One end of the sampling switch is connected with the output end of the EA1The other end of the sampling capacitor C is connected with a sampling capacitor CSUpper stage plate, sampling capacitor CSLower plate of (3) is grounded, and a sampling capacitor CSThe upper board of (2) is connected with the forward end of the OTA.
The output end of the OTA is connected with a charging and discharging bias current circuit through a Control module.
The charging and discharging bias current circuit comprises a charging switch tube M3 and a discharging switch tube M4.
The second technical scheme adopted by the invention is that the method for reinforcing the single-event transient state by using the single-event transient state reinforcing circuit applied to the DC-DC converter specifically comprises the following processes:
when the EA output end works normally, the OTA output common mode level is used as a Control module Control signal to enable the bias current Ibias1、Ibias2When the charging switch tube M3 and the discharging switch tube M4 are turned off, the charging and discharging bias current circuit and the EA output node are directly disconnected;
when the EA output end causes single-particle transient pulse due to heavy ion bombardment, the Control module outputs an enable signal EN to start a charge-discharge bias current circuit, and when V is negative pulseCLess than VCSWhen the set threshold value is exceeded, the OTA outputs high level, and the Control module outputs low level to enable the charging switch tube M3Conducting to rapidly charge the EA output end; if positive pulses are present, i.e. VCGreater than VCSWhen the set threshold value is exceeded, the OTA outputs low level, and the Control module outputs high level to enable the discharge switch tube M4And conducting to rapidly discharge the EA output end.
The invention has the beneficial effects that: the single-event transient reinforcing circuit applied to the DC-DC converter is simple in circuit structure, and the reinforced circuit and the reinforcing circuit can inhibit the single-event transient effect. Compared with the traditional layout-level reinforcement scheme, the method can evaluate and design the anti-irradiation capability of the circuit in the design stage of the schematic diagram of the circuit. Meanwhile, the problem that the EA output node in a voltage loop of the DC-DC converter causes the output voltage V due to the influence of ASET is solvedOUTIncrease of ripple voltage or output voltage VOUTAnd the recovery time of the DC-DC converter loop after single-event disturbance is accelerated due to the problem of fluctuation.
Drawings
Fig. 1 is a schematic diagram of a Boost type DC-DC converter loop;
fig. 2 is a schematic diagram of a single-event transient reinforcing circuit applied to a DC-DC converter according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
A schematic diagram of a Boost type DC-DC converter loop is shown in FIG. 1, EA is taken as one of core modules of a voltage loop, and an inverting terminal and a feedback voltage V are arrangedFBConnected with a forward terminal connected to a reference voltage VREFConnected, amplifies the difference between them, EA outputs a voltage VCIs connected with the PWM reverse end and realizes the main switch M through a digital control module1Flow-continuing tube M2The gate control of (2). EA amplifier is because big electric capacity C of frequency compensation moduleCResulting in the output node being sensitive to single particles and due to the large capacitance CCResulting in slow recovery thereof, which in turn results in M1、M2The grid control signal has wide and narrow pulse phenomena or pulse loss, and finally the output voltage V is enabled to beOUTIncrease of ripple voltage or VOUTFluctuating.
The invention is applied to the single-event transient state of the DC-DC converterThe reinforcing circuit, as shown in FIG. 2, includes an OTA (transconductance amplifier) whose forward end is connected with a sampling capacitor CSSampling switch S1The reverse end of the OTA is connected with the output end of the EA, and the output of the OTA is connected with the charging and discharging bias current circuit. Sampling switch S1One end of the sampling switch is connected with the output end of the EA1The other end of the sampling capacitor C is connected with a sampling capacitor CSUpper stage plate, sampling capacitor CSLower plate of (3) is grounded, and a sampling capacitor CSThe upper board of (2) is connected with the forward end of the OTA. The output end of the OTA is connected with a charging and discharging bias current circuit through a Control module.
The invention relates to a method for reinforcing single-event transient by using a single-event transient reinforcing circuit of a DC-DC converter, which utilizes a sampling switch S1Sampling capacitor CSFor EA output VCSampling is carried out, a sampling signal is used as an input signal of a forward end of the OTA, a reverse end of the OTA is directly connected with an EA output end, real-time single particle detection is carried out on an EA output node, and rapid charging and discharging operations are carried out on the EA output node by comparing the sizes of the sampling signal and the EA output node. When the OTA output end is directly connected with the EA output end, the detection and suppression of the single-event transient effect can be realized.
And the OTA amplifies the difference value between the sampling voltage and the detection voltage, sets an OTA turnover threshold value, and outputs a high level and a low level as a compensation circuit control signal when the difference value is more than 10 mV. If ASET occurs and the detection voltage is lower than the sampling voltage, the OTA outputs a high level control compensation circuit to carry out quick charging acceleration recovery on an EA output end; when the detection voltage is higher than the sampling voltage, the OTA outputs a low level to control the compensation circuit to work so as to carry out quick discharge accelerated recovery on the EA output end; and when the difference value between the detection voltage and the sampling voltage does not exceed 10mV, the OTA output is set to be in a high-impedance state, and the compensation network is controlled to be closed and disconnected with the EA output end.
When the DC-DC converter works normally, the compensation circuit does not work, only the voltage of the EA output node is detected, and the normal work and the performance of a voltage loop are ensured.
The sampling voltage of the OTA forward end is disconnected with the output node, and the detection voltage of the reverse end follows the EA output voltage VCChange if ASET occursAt the output node of the OTA, the charging circuit or the discharging circuit is opened, extra charging and discharging operations are carried out on the EA output node, at the moment, the OTA can rapidly make adjustment to prevent the phenomenon of over-charging or over-discharging, and the effect of restraining the single-event transient effect is also achieved.
When the loop is working normally, the sampling switch S1Closing once every 100 cycles, refreshing sampling capacitor CSThe sampled voltage is used as a positive input signal of the OTA; and the reverse end is directly connected with an EA output node to detect the single-event transient pulse in real time. M3 and M4 are charge and discharge switch tubes, respectively, M5-M8 constitute a current mirror, Ibias1、Ibias2The bias current is charged and discharged.
When the EA output end works normally, the OTA output common mode level is used as a Control module Control signal to enable the bias current Ibias1、Ibias2When the charging switch tube M3 and the discharging switch tube M4 are turned off, the charging and discharging circuit is directly disconnected with the EA output node, power consumption is not generated, and normal operation of a loop is not influenced.
When the EA output end causes single-particle transient pulse due to heavy ion bombardment, the Control module outputs an enable signal EN to start a charge-discharge bias current circuit, and when V is negative pulseCLess than VCSWhen the set threshold value is exceeded, the OTA outputs high level, and the Control module outputs low level to enable the charging switch tube M3Conducting to rapidly charge the EA output end; if positive pulses are present, i.e. VCGreater than VCSWhen the set threshold value is exceeded, the OTA outputs low level, and the Control module outputs high level to enable the discharge switch tube M4And conducting to rapidly discharge the EA output end.
Through the mode, the single-event transient reinforcing circuit applied to the DC-DC converter can inhibit the single-event transient effect of the EA output node, further greatly shortens the recovery time of a DC-DC converter loop after single-event disturbance, and reduces the ripple voltage and voltage fluctuation of output voltage.
The single-event transient state reinforcing circuit applied to the DC-DC converter solves the problem of hysteresis evaluation of a domain-level or process-level reinforcing technology.
The single-event transient reinforcing method applied to the single-event transient reinforcing circuit of the DC-DC converter inhibits the output voltage V of the DC-DC converter caused by ASETOUTIncrease of ripple voltage or output voltage VOUTThe recovery time of the DC-DC converter loop after single-event disturbance is shortened due to the fluctuation problem.
Claims (5)
1. Be applied to single event transient state reinforcing circuit of DC-DC converter, its characterized in that: comprises an OTA, wherein the positive end of the OTA is sequentially connected with a sampling capacitor CSSampling switch S1The reverse end of the OTA is connected with the output end of the EA, and the output of the OTA is connected with the charging and discharging bias current circuit.
2. The single-event transient reinforcement circuit applied to the DC-DC converter according to claim 1, wherein: the sampling switch S1One end of the sampling switch is connected with the output end of the EA1The other end of the sampling capacitor C is connected with a sampling capacitor CSUpper stage plate, sampling capacitor CSLower plate of (3) is grounded, and a sampling capacitor CSThe upper board of (2) is connected with the forward end of the OTA.
3. The single-event transient reinforcement circuit applied to the DC-DC converter according to claim 2, wherein: and the output end of the OTA is connected with a charging and discharging bias current circuit through a Control module.
4. The single-event transient reinforcement circuit applied to the DC-DC converter according to claim 3, wherein: the charging and discharging bias current circuit comprises a charging switch tube M3 and a discharging switch tube M4.
5. The method for single-event transient reinforcement by using the single-event transient reinforcement circuit applied to the DC-DC converter of claim 4 is characterized in that: the method specifically comprises the following steps:
when the EA output end works normally, the OTA output common mode level is used as a Control module Control signal to biasCurrent Ibias1、Ibias2When the charging switch tube M3 and the discharging switch tube M4 are turned off, the charging and discharging bias current circuit and the EA output node are directly disconnected;
when the EA output end causes single-particle transient pulse due to heavy ion bombardment, the Control module outputs an enable signal EN to start a charge-discharge bias current circuit, and when V is negative pulseCLess than VCSWhen the set threshold value is exceeded, the OTA outputs high level, and the Control module outputs low level to enable the charging switch tube M3Conducting to rapidly charge the EA output end; if positive pulses are present, i.e. VCGreater than VCSWhen the set threshold value is exceeded, the OTA outputs low level, and the Control module outputs high level to enable the discharge switch tube M4And conducting to rapidly discharge the EA output end.
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| CN202111043509.0A CN113922668B (en) | 2021-09-07 | 2021-09-07 | Single-event transient strengthening circuit and method applied to DC-DC converter |
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| CN202111043509.0A CN113922668B (en) | 2021-09-07 | 2021-09-07 | Single-event transient strengthening circuit and method applied to DC-DC converter |
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| CN113922668A true CN113922668A (en) | 2022-01-11 |
| CN113922668B CN113922668B (en) | 2024-01-16 |
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| CN113922668B (en) | 2024-01-16 |
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