CN202488348U - Step-up converter circuit - Google Patents
Step-up converter circuit Download PDFInfo
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- CN202488348U CN202488348U CN2011202559375U CN201120255937U CN202488348U CN 202488348 U CN202488348 U CN 202488348U CN 2011202559375 U CN2011202559375 U CN 2011202559375U CN 201120255937 U CN201120255937 U CN 201120255937U CN 202488348 U CN202488348 U CN 202488348U
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Abstract
Disclosed is a step-up converter circuit which comprises a voltage regulating circuit, a step-up circuit, and a control circuit. The voltage regulating circuit can be operated to generate a regulated voltage, wherein the regulated voltage is generated from an input power supply voltage during a first mode period, and alternatively is generated from an output power supply voltage during a second mode period. The step-up circuit is supplied from the regulated voltage, and can be operated to control the switch of the transistor in the first mode period and the second mode period to generate the output power supply voltage. The control circuit can be operated to switch the circuit from the first mode to the second mode, responding to the detection of one of that the output power supply voltage reaches a threshold voltage or that a defined starting time expires. The disclosed step-up converter circuit can perform low power startup and maintain efficient operations when the power supply decreases.
Description
Technical field
The utility model relates generally to step-up converter circuit, and relates more specifically to and can supply with the step-up converter circuit of carrying out the low-power startup when descending and keeping valid function at power supply.
Background technology
Booster circuit is designed to receive input voltage usually and produces the output voltage bigger than input voltage.So illustrative booster circuit has been described in Fig. 1, and wherein illustrative booster circuit 100 comprises inner ldo regulator circuit 102, and the power supply of this inside ldo regulator circuit 102 is supplied with node and is connected in power supply supply 104.Yet because the internal circuit of illustrative booster circuit 100 is supplied power by the power supply supply 104 with battery forms in Fig. 1, so this circuit 100 receives the influence of the minimizing of power supply supply 104 especially easily.So, the circuit 100 in Fig. 1 is more suitable for supplying with in the more high-voltage power supply that for example has lithium ion battery that about 3-5V voltage supplies with and so on, rather than for example those LVPSs in about 1.2V to 1.5V scope and so on are supplied with.
Fig. 2 has explained another example of booster circuit 200, and wherein inner ldo regulator circuit 202 is supplied with the output voltage power supply that node is produced by booster circuit 200 at its power supply.Though the circuit 200 in Fig. 2 can provide the solution of incident that the internal circuit power supply that exists in the circuit among Fig. 1 100 is supplied with, the circuit 200 in Fig. 2 needs high relatively service voltage to keep operation after it starts.So; Circuit 200 in Fig. 2 fragility special after startup to the decline of service voltage 204; And therefore, for the application that for example during the routine operation of booster circuit 200, takes place to reduce from the service voltage 204 of battery, be not a kind of practicable solution.
Fig. 3 has explained the example of another booster circuit 300, and wherein the example of booster circuit 300 has omitted the internal regulator circuit, and the power supply of alternatively that it is inner booster circuit 302 supply node is coupled directly to power supply supply 304.Fig. 4 has explained the example of another booster circuit 400 similar with the example of booster circuit 300 in Fig. 3, but wherein inner booster circuit 402 power supplys are supplied with the output voltage that node is coupled directly to booster circuit 400.Be designed to allow more simply starting of each booster circuit at Fig. 3 and 4 illustrated example; Yet these circuit are responsive to external disturbance.For example; The internal resistance of supplying with when power supply is big relatively (for example; 0.5 in the time of ohm), the booster circuit 300 in Fig. 3 experiences aspect boosting efficiency significantly and reduces, the voltage reduction of eastern output transistor 306 caused when this was normally increased by the output current when circuit 300.And when power supply was supplied with remarkable reduction of voltage experience at 304 places, the booster circuit 300 in Fig. 3 lost efficacy during low-power operation.When the load instantaneously changing appeared at its output, it is unstable that the booster circuit 400 among Fig. 4 becomes, and causes the output of circuit 400 to be vibrated.Traditional step-up converter circuit so, for example above-described and explanation in Fig. 1-4 can not provide low-power to start and effective low-power operation.
The utility model content
The disclosure provides a kind of step-up converter circuit, can operate to obtain the low-power startup and keep effective low-power operation.In one embodiment; Said step-up converter circuit comprises voltage regulator circuit; Can operate the voltage that produces through regulating; Wherein said voltage through adjusting produces from input power supply service voltage during first pattern, and alternatively, during second pattern, from the out-put supply service voltage, produces; Booster circuit is supplied with through the voltage of regulating from said, and the switching that can operate oxide-semiconductor control transistors during said first pattern and said second pattern is to produce said out-put supply service voltage; And control circuit, can operate and expire one of them the start-up time that said out-put supply service voltage reaches threshold voltage or detect definition in response to detecting, with said circuit from said first mode switch to said second pattern.
According to an execution mode of the present disclosure; Said voltage regulator circuit is low dropout voltage adjuster, can operate in adaptive switched being configured to and produce said voltage through regulating from produced said switching to by said out-put supply service voltage through the voltage of regulating by said input power supply service voltage.
According to an execution mode of the present disclosure, said voltage regulator circuit and said booster circuit receive reference voltage from band-gap circuit.
According to an execution mode of the present disclosure; Said booster circuit is operable in open loop mode and drives said transistorized switching when being in said first pattern when said circuit, and is operable in closed loop mode and drives said transistorized switching when being in said second pattern when said circuit.
According to an execution mode of the present disclosure, said transistorized saidly drive by the low duty ratio signal during switching in said open loop mode.
According to an execution mode of the present disclosure, said transistorized saidly drive by pulse width modulating signal during switching in said closed loop mode.
Another embodiment of the present disclosure comprises a kind of step-up converter circuit; Comprise voltage regulator; Can operate the voltage that provides through regulating; Wherein said voltage through adjusting produces from input power supply service voltage during start-up mode, and alternatively, during the routine operation pattern, from the out-put supply service voltage, produces; Booster circuit can be operated receiving said voltage through regulating, and can operate the switching of oxide-semiconductor control transistors, and said transistor reaches first voltage at the said out-put supply service voltage of said start-up mode drive; And controller circuitry, can operate to reach said first voltage in response to detecting said out-put supply service voltage, said booster circuit is switched to said routine operation pattern from said start-up mode.
According to an execution mode of the present disclosure, said booster circuit also can operate the said transistorized switching of control during said routine operation pattern, reaches second voltage bigger than said first voltage to drive said out-put supply service voltage.
According to an execution mode of the present disclosure, said start-up mode is the low-power start-up mode.
According to an execution mode of the present disclosure; Said voltage regulator is low dropout voltage adjuster, is operable in adaptive switched being configured to and produces said voltage through regulating from produced said switching to by said out-put supply service voltage through the voltage of regulating by said input power supply service voltage.
According to an execution mode of the present disclosure; Said booster circuit is operable in open loop mode when said booster circuit is in said start-up mode, driving said transistorized switching, and is operable in closed loop mode and drives said transistorized switching when being in said routine operation pattern when said booster circuit.
According to an execution mode of the present disclosure, said transistorized saidly drive by the low duty ratio signal during switching in said open loop mode.
According to an execution mode of the present disclosure, said transistorized saidly drive by pulse width modulating signal during switching in said closed loop mode.
According to an execution mode of the present disclosure, said controller circuitry is in response to expiring the start-up time that detects definition, routine operation pattern shown in said booster circuit is switched to from said start-up mode.
Disclosed step-up converter circuit can be supplied with at power supply and carry out the low-power startup when descending and keep valid function.
According to the following detailed description of embodiment, and combine accompanying drawing to read, aforementioned and other characteristics of the present disclosure and beneficial effect further become cheer and bright.Concrete description and accompanying drawing only are the explanations to content of the present disclosure, and do not limit the utility model appended claim and the protection range that equivalent limited thereof.
Description of drawings
Example through in the accompanying drawing of also not to scale (NTS) drafting comes illustrative embodiment, and wherein same label is represented similar part, and wherein:
Fig. 1 shows the example of first step-up converter circuit known in the prior art;
Fig. 2 shows the example of second step-up converter circuit known in the prior art;
Fig. 3 shows the example of the 3rd step-up converter circuit known in the prior art;
Fig. 4 shows the example of the 4th step-up converter circuit known in the prior art;
Fig. 5 shows the example of the embodiment of disclosed step-up converter circuit;
Fig. 6 shows the example by the timing controller embodiment of circuit that in the embodiment of the disclosed step-up converter circuit shown in Fig. 5 example, provides;
Fig. 7 shows the example by the embodiment of the voltage modulator circuit that in the embodiment of the disclosed step-up converter circuit shown in Fig. 5 example, provides;
Fig. 8 shows the example by the embodiment of the band-gap circuit that in the embodiment of the disclosed step-up converter circuit shown in Fig. 5 example, provides.
Embodiment
Current disclosed content provides high efficiency step-up converter circuit.Disclosed step-up converter circuit can be operated and realize the low-power startup and keep effective low-power operation.According to current disclosed content, the low-power startup refers to, the ability that disclosed step-up converter circuit starts when the power supply supply of step-up converter circuit produces significantly reduced service voltage with respect to its designing power supply voltage.For example, disclosed step-up converter circuit can realize that LVPS supplies with, and for example has the starting resistor scope in that approximately 1.2-1.5V and internal resistance are 0.5 ohm alkaline batteries.Carrying out low-power when so, disclosed step-up converter circuit can be positioned at the voltage of minimizing of about 1V at the service voltage that power supply is supplied with starts.The low-power operation that should also be noted that disclosed step-up converter circuit is confirmed as when step-up converter circuit operates in routine operation pattern (that is, not starting) duration that the service voltage that power supply is supplied with lacks than its starting resistor here.For example, start if step-up converter circuit is carried out low-power at about 1V place, then low-power operation can occur in power supply and supplies with for example to reduce to and operate in the routine operation pattern again between the while between the 0.6V to 1.0V.And; When at this circuit operation in the routine operation pattern and service voltage when descending; Have the driving voltage of consistent crest voltage when the power transistor place of the charging (to produce output voltage) of control output capacitance is kept, low-power operation is regarded as effectively.It will be appreciated that the voltage parameter of explanation is intended to provide generic instance, is used to describe the operation of disclosed step-up converter circuit here, be not intended to limit the scope of the claim that content of the present disclosure and hereinafter provide.
Fig. 5 shows in the disclosed stepup transformer transducer shop example of 500 embodiment; Wherein stepup transformer converter circuit 500 comprises voltage regulator 502 usually; Band gap 504, timing controller 506, and the internal circuit 510 that is used to control the operation of step-up converter circuit 500.Usually; Step-up converter circuit 500 is designed to from power supply supply 508, receive input voltage vin; Wherein, During start-up mode, input voltage vin is supplied with to 502 power supplies of the adjuster of internal circuit 510 as power supply, is used at Switching Power Supply transistor M1 place generation low duty ratio drive signal with the generation output voltage V out that boosts through the output voltage of regulating.Step-up converter circuit 500 switches to the routine operation pattern subsequently; Wherein supply with adjuster 502 power supplies as power supply, be used at Switching Power Supply transistor M1 place the generation pulse width modulated driving signal with the generation output voltage V out that boosts through the output voltage of regulating to internal circuit 510 through the output voltage V out (it is bigger than input voltage vin now) that boosts.Start with routine operation during, the charging that internal circuit 510 driving power transistor M1 control output capacitance Cout is with the generation output voltage V out that boosts, and wherein uses the input voltage vin of supplying with 508 generations by power supply to charge as output capacitance Cout.
Such as preceding text record, step-up converter circuit 500 operates in two patterns: start and routine operation.Boost converter 500 operates in start-up mode until a) reaching predetermined threshold value voltage, perhaps b through the output voltage V out that boosts) definition time period expire.When one of them of this two incidents took place, boost converter 500 switched to the routine operation pattern.During start-up mode, input voltage vin is used as the power supply of adjuster 502 and is supplied with the voltage that produces through regulating, thereby gives internal circuit 510 power supplies, and entire circuit is operated and produced and increase this output voltage V out through boosting lentamente.When power supply was supplied with 508 generation low input Vin (with respect to its design input voltage), start-up mode can be implemented as low-power and start.For example, among the disclosed here embodiment, it can be the battery of 1.25V with internal resistance of 0.5 ohm that power supply supplies with 508, and wherein this battery produces the low input Vin of about 1V between the starting period.When boost converter 500 switches to the routine operation pattern; The voltage that produces through regulating is supplied with in output voltage V out application through boosting as the power supply of adjuster 502; Thereby give internal circuit 510 power supplies, and entire circuit is operated to continue to increase through the output voltage V out that boosts and is reached its design output voltage that boosts until it.When input voltage vin was lower than startup input voltage (that is, the Vin during start-up mode), the routine operation pattern can be implemented as low-power operation.For example, in the embodiment that preceding text are discussed, the input voltage vin of 1.25V battery can drop to during the routine operation pattern and be lower than 1V, carries out low-power operation at this step-up converter circuit.
In the disclosed embodiment of preceding text; Disclosed step-up converter circuit 500 can operate that to come to supply with 508 at power supply be to have internal resistance when being the battery of 0.5 ohm of 1.25V that produces input voltage vin, carries out low-power and starts and keep effective low-power operation, wherein; Input voltage vin is starting (promptly; The low-power startup) during is about 1V, and during routine operation pattern (that is low-power operation), reduces to about 0.6V.In current embodiment, disclosed boost converter 500 operates in start-up mode and work as subsequently a) and reaches about 2V, perhaps b through the output voltage V out that boosts) time period of defining switches to the routine operation pattern when expiring.In current embodiment, step-up converter circuit 500 is designed to obtain the output voltage V out through boosting of about 3.3V, and the scope of output current Iout is between 0-100mA.Illustrated like hereinafter; When input voltage vin is 1V; Step-up converter circuit 500 is through supplying with input voltage vin to give adjuster 502 power supplies as power supply; And produce the low duty ratio drive signal at power transistor M1 place and generate output voltage V out, thereby realize that low-power starts through boosting.In addition; Even when input voltage vin descends during the routine operation pattern; Step-up converter circuit 500 is supplied power through supplying with to adjuster 502 as power supply through the output voltage V out that boosts during the routine operation pattern; And the drive signal that produces pulse width modulation at power transistor M1 place generates the output voltage V out through boosting, thereby keeps effective low-power operation.
Provide timing controller 506 to control step-up converter circuit 500 and switch to the routine operation pattern from start-up mode.Mentioned like preceding text, when one of two incidents took place, timing controller 506 switched to the routine operation pattern from start-up mode.First incident is that voltage is correlated with and relates to when when the output voltage V out that boosts reaches predetermined threshold value the switching from start-up mode to the routine operation pattern.Second incident be time correlation and relate to switching at the expiration from start-up mode to the routine operation pattern along with the time period of definition.
As shown in Figure 5, timing controller 506 receives input voltage vin and output voltage V out, and produces operation that logic output signal TCout is used for control switch 509 and operate in open loop or closed loop mode with the internal circuit 510 of selection step-up converter circuit 500.Step-up converter circuit 500 operates in start-up mode when internal circuit 510 operates in open loop mode, and step-up converter circuit 500 operates in the routine operation pattern when internal circuit 510 operates in closed loop mode.Therefore, when timing controller 506 with internal circuit 510 when open loop mode switches to closed loop mode, timing controller 506 switches to the routine operation pattern with step-up converter circuit 500 from start-up mode.
The embodiment example of timing controller 506 has been shown in Fig. 6, and wherein timing controller 506 comprises first comparator 602 and second comparator 604.Provide first comparator 602 to relate to the relevant mode switch incident of sense voltage, and output reference voltage Vo 1 and threshold value Vth1 are come relatively to confirm whether output voltage V out has reached predefined voltage (for example, 2V).If Vo1 rises to value bigger than Vth1 or that equate between the starting period; Then reached predefined voltage through the output voltage V out that boosts; And logic output signal TCout trigger switch 509 is arranged at closed loop mode (that is, being transformed into the routine operation pattern from start-up mode) with internal circuit 510.Provide second comparator 604 to relate to the relevant incident of detecting period, and compare input reference voltage Vi1 and slope timing threshold voltage vt h2.The incident of time correlation is provided with the time period (establishing the relevant incident of voltage does not at first take place) of the definition that start-up mode will operate.The time period of definition depends on regularly threshold voltage vt h2 of slope, and wherein the slope on slope can change through the value and/or the charging current of condenser 608 of adjustment electric capacity 606.If ramp voltage Vth2 rises to value bigger than Vi1 or that equate between the starting period; Then the time period of definition is over and done with; And logic output signal TCout trigger switch 509 is arranged at closed loop mode (that is, being transformed into the routine operation pattern from start-up mode) with internal circuit 510.
Return with reference to Fig. 5; Voltage regulator 502 receives input voltage vin; Through the output voltage V out that boosts, and two reference voltage Vref 1 and Vbg, and produce output voltage V reg supplying with node through regulating to the power supply of internal circuit 510 and band-gap circuit 504.First reference voltage Vref 1 is supplied with 508 voltage divider 511 generations by being coupled in power supply, and the second reference voltage Vbg is the voltage that is produced by band-gap circuit 504.In a word;, step-up converter circuit 500 produces from input voltage vin when being in start-up mode through the output voltage V reg that regulates; And when step-up converter circuit 500 was in the routine operation pattern, the output voltage V reg that warp is regulated was from producing through the output voltage V out that boosts.Be used for to band gap 504 and internal circuit 510 power supplies through the voltage Vreg that regulates; The internal circuit that wherein receives the voltage Vreg of warp adjusting comprises oscillator 512; Error amplifier 514, comparator 516, with and power supply supply with logic and the drive circuit 518 that node is coupled and receives Vreg.Voltage regulator 502 provides constant through the circuit in step-up converter circuit 500, to external disturbance immunity is provided through the voltage regulated.Because voltage regulator 502 provides constant voltage to supply with to internal circuit 510; Therefore; When circuit operation during at normal mode, the pulse width modulation driving voltage with consistent crest voltage is kept at the power transistor M1 place of the charging of control output capacitance Cout.
The example of the embodiment of voltage regulator 502 has been shown in Fig. 7, is adaptive switched at the voltage regulator shown in Fig. 7 502 wherein, low dropout voltage adjuster.Voltage regulator 507 comprises first 702 and second portion 704.First 702 receives reference voltage Vref 1, input voltage vin and output voltage V out through boosting, and, when activating, use input voltage vin to drive voltage Vreg through regulating.Second portion 704 receive band gap voltage Vbg and through the output voltage V out that boosts and, when activating, use through the output voltage V out that boosts and drive voltage Vreg through regulating.
First 702 comprises that reception produces the voltage divider 706 of dividing potential drop Vd1 through the output voltage V out that boosts and at oxide-semiconductor control transistors C1 place.Wherein oxide-semiconductor control transistors C1 controls " adaptive switched " function of voltage regulator 502.During start-up mode, can not activate oxide-semiconductor control transistors C1 thereby dividing potential drop Vd1 is too low, and first 702 is activated.So, input voltage vin is supplied with as the power supply of adjuster 502, and will regulate based on reference voltage Vref 1 through the voltage Vreg that regulates.
When step-up converter circuit 500 when start-up mode switches to the routine operation pattern, dividing potential drop Vd1 enough activates oxide-semiconductor control transistors C1 greatly, said oxide-semiconductor control transistors C1 closes first 702 and activates second portion 704.When this takes place, supply with as the power supply of adjuster 502 through the output voltage V out that boosts, and will regulate based on band gap voltage Vbg through the voltage Vreg that regulates.When first 702 closed, input voltage vin was isolated from internal circuit 510 effectively.So, during routine operation, the minimizing of input voltage vin influences the voltage Vreg through regulating that the internal circuit 510 to step-up converter circuit 500 provides hardly, thereby makes step-up converter circuit 500 keep effective low-power operation.Through during start-up mode, using input voltage vin to drive voltage Vreg through regulating; And use drives the output voltage V reg through regulating through the output voltage V out that boosts during the routine operation pattern; Voltage regulator 502 is supplied with sufficient continuously to band gap 504 and internal circuit 510, through the voltage of regulating, thereby allow start or routine operation during; Even during low-power operation, to the valid function of step-up converter circuit 500.
As stated, band gap 504 receives from adjuster 502 through the voltage Vreg that regulates, and produces band gap voltage Vbg, and it supplies with the reference voltage for voltage regulator 502 and error amplifier 514.The example of the embodiment of band gap 504 has been shown in Fig. 8, is two-stages in the band gap shown in Fig. 8 504 wherein, the band gap that low-voltage is supplied with.During start-up mode, drive by input voltage vin through the voltage Vreg that regulates, and band gap 504 first order are activated and produce absolute temperature and replenish (CTAT) electric current, the mode that this electric current is described with hereinafter is used to produce band gap voltage Vbg.Because the voltage Vreg through regulating is stable between the starting period, activates and produce absolute temperature ratio (PTAT) electric current so the second level of band gap 504 becomes.The first order combines the band gap voltage Vbg that CTAT and PTAT electric current produce can provide stable reference voltage for voltage regulator 502 and error amplifier 514 subsequently.Illustrated like preceding text, band gap voltage Vbg is being used as reference voltage during the routine operation subsequently in voltage regulator 502 and error amplifier 514.
As stated, internal circuit 510 operates in open loop mode when step-up converter circuit 500 is in start-up mode, and internal circuit 510 operates in closed loop mode when step-up converter circuit 500 is in the routine operation pattern.In open loop mode operating period, the voltage Vreg (it is supplied with from input voltage vin by adjuster 502) that oscillator 512 receives through regulating also drives low duty ratio charger circuit 520.Switch 509 is coupled in logic and drive circuit 518 (being coupled in overcurrent protection and excess voltage protection 522) with the output of low duty ratio charger circuit 520; Thereby driving power transistor M1, the slow charging of its control output capacitance Cout produces the output voltage V out through boosting.Owing to increase continuously through the output voltage V out that boosts; It finally reaches triggering timing controller 506 internal circuit 510 is switched to close loop maneuver (perhaps; Substitute; Timing controller 506 switches to close loop maneuver with internal circuit 510 in the time period of definition when expiring) predefined threshold voltage (for example, 2V).
When internal circuit 510 when closed loop mode is operated; Oscillator 512; Error amplifier 514; Comparator 516, and logic and drive circuit 518 receive by the voltage Vreg through regulate of adjuster 502 from supplying with through the output voltage V out that boosts, and continue the design output voltage values that charges to step-up converter circuit 500 (for example 3.3V) that driving power transistor M1 controls output capacitance Cout.Concrete, error amplifier 514 compares band gap voltage Vbg and feedback voltage Vfb to produce error signal, and it receives in PFM/PWM controller 524 and comparator 516.PFM/PWM controller 524 receives this signal and indicates boost converter 500 to operate in pure PWM pattern from error amplifier 514 still is the PFM/PWM switching mode.The signal that compensator 526 produces from inductor 528 perception, wherein the compensator signal combination is by the output of the ramp generator 530 of oscillator 512 drivings.The compensator signal compares in comparator 516 and error signal subsequently.The output of comparator 516 is coupled (through switch 509) subsequently in logic and drive circuit 518, and the voltage signal that its use has the pulse width modulation of consistent crest voltage comes driving power transistor M1.If (for example, 3.3V), then power transistor M1 continues the charging of control output capacitance Cout, until the output voltage that equals to expect through the output voltage V out that boosts less than the output voltage of expectation through the output voltage V out that boosts.
Claims (14)
1. a step-up converter circuit comprises
Voltage regulator circuit can be operated the voltage that produces through regulating, and wherein said voltage through adjusting produces from input power supply service voltage during first pattern, and alternatively, during second pattern, from the out-put supply service voltage, produces;
Booster circuit is supplied with through the voltage of regulating from said, and the switching that can operate oxide-semiconductor control transistors during said first pattern and said second pattern is to produce said out-put supply service voltage; And
Control circuit can be operated and expire one of them the start-up time that said out-put supply service voltage reaches threshold voltage or detect definition in response to detecting, with said circuit from said first mode switch to said second pattern.
2. step-up converter circuit according to claim 1; Wherein said voltage regulator circuit is low dropout voltage adjuster, can operate in adaptive switched being configured to and produce said voltage through regulating from produced said switching to by said out-put supply service voltage through the voltage of regulating by said input power supply service voltage.
3. step-up converter circuit according to claim 1, wherein said voltage regulator circuit and said booster circuit receive reference voltage from band-gap circuit.
4. step-up converter circuit according to claim 1; Wherein said booster circuit is operable in open loop mode and drives said transistorized switching when being in said first pattern when said circuit, and is operable in closed loop mode and drives said transistorized switching when being in said second pattern when said circuit.
5. step-up converter circuit according to claim 4, wherein said transistorized saidly drive by the low duty ratio signal during switching in said open loop mode.
6. step-up converter circuit according to claim 4, wherein said transistorized saidly drive by pulse width modulating signal during switching in said closed loop mode.
7. step-up converter circuit comprises:
Voltage regulator can be operated the voltage that provides through regulating, and wherein said voltage through adjusting produces from input power supply service voltage during start-up mode, and alternatively, during the routine operation pattern, from the out-put supply service voltage, produces;
Booster circuit can be operated receiving said voltage through regulating, and can operate the switching of oxide-semiconductor control transistors, and said transistor reaches first voltage at the said out-put supply service voltage of said start-up mode drive; And
Controller circuitry can be operated to reach said first voltage in response to detecting said out-put supply service voltage, and said booster circuit is switched to said routine operation pattern from said start-up mode.
8. step-up converter circuit according to claim 7; Wherein said booster circuit also can operate the said transistorized switching of control during said routine operation pattern, reaches second voltage bigger than said first voltage to drive said out-put supply service voltage.
9. step-up converter circuit according to claim 7, wherein said start-up mode are the low-power start-up mode.
10. step-up converter circuit according to claim 7; Wherein said voltage regulator is low dropout voltage adjuster, is operable in adaptive switched being configured to and produces said voltage through regulating from produced said switching to by said out-put supply service voltage through the voltage of regulating by said input power supply service voltage.
11. step-up converter circuit according to claim 7; Wherein said booster circuit is operable in open loop mode when said booster circuit is in said start-up mode, driving said transistorized switching, and is operable in closed loop mode and drives said transistorized switching when being in said routine operation pattern when said booster circuit.
12. step-up converter circuit according to claim 11, wherein said transistorized saidly drive by the low duty ratio signal during switching in said open loop mode.
13. want 11 described booster circuits according to right, wherein said transistorized saidly drive by pulse width modulating signal during switching in said closed loop mode.
14. step-up converter circuit according to claim 7, wherein said controller circuitry be in response to expiring the start-up time that detects definition, routine operation pattern shown in said booster circuit is switched to from said start-up mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202559375U CN202488348U (en) | 2011-06-30 | 2011-06-30 | Step-up converter circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202559375U CN202488348U (en) | 2011-06-30 | 2011-06-30 | Step-up converter circuit |
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| CN202488348U true CN202488348U (en) | 2012-10-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109640714A (en) * | 2016-08-08 | 2019-04-16 | 莱战略控股公司 | Boost converter for aerosol delivery equipment |
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- 2011-06-30 CN CN2011202559375U patent/CN202488348U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109640714A (en) * | 2016-08-08 | 2019-04-16 | 莱战略控股公司 | Boost converter for aerosol delivery equipment |
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Address after: 5 / F East B501, South B502, North B503, 6th floor, block B, TCL Industrial Research Institute building, No. 006, Gaoxin South 1st Road, Nanshan District, Shenzhen City, Guangdong Province Patentee after: STMicroelectronics (Shenzhen) R&D Co.,Ltd. Address before: 518057, 4/5 building, B block, South SKYWORTH building, South Zone, Shenzhen hi tech Zone, Nanshan District science and Technology Park, Guangdong, China Patentee before: STMicroelectronics (Shenzhen) R&D Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20121010 |
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| CX01 | Expiry of patent term |