CN103529891B - A kind of soft starting device and method - Google Patents
A kind of soft starting device and method Download PDFInfo
- Publication number
- CN103529891B CN103529891B CN201210233862.XA CN201210233862A CN103529891B CN 103529891 B CN103529891 B CN 103529891B CN 201210233862 A CN201210233862 A CN 201210233862A CN 103529891 B CN103529891 B CN 103529891B
- Authority
- CN
- China
- Prior art keywords
- voltage
- power
- control module
- pmos
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of soft starting device and method, be applicable to voltage regulator, especially without capacitance voltage regulator.This device, by setting up Voltage Establishment rate control module on the basis of existing voltage modulator circuit, for controlling the output voltage of described error amplifier, makes the output voltage of voltage modulator circuit rise to stationary value when circuit is set up by set rate; Namely corresponding method rises to stationary value by the output voltage of voltage modulator circuit by set rate; This solution avoids the voltage and current after power tube conducting to impact, reduce the transient current in loop work point process of establishing.
Description
Technical field
The present invention relates to a kind of soft Starting Technology, particularly relate to one for voltage regulator (VR:VoltageRegulator) especially without soft start (SoftStart) device and method of capacitance voltage regulator (Cap-lessVR).
Background technology
Voltage regulator apparatus has the advantages such as low in energy consumption, outer member is few, electromagnetic interference (EMI) is little, is applied in SOC (system on a chip) (SOC:systemonchip) chip as Power Management Unit.Especially, in the portable set such as mobile phone, individual mobile terminal, to the power consumption requirements increasingly stringent of SOC, be widely applied without external capacitive voltage regulator.Shown in Figure 1, the circuit unit of voltage regulator generally includes: a reference source VREF(reference voltage), an error amplifier 12(ErrorAmplifier), a PMOS power tube 13(enhanced power PMOS; Also can adopt enhancement mode NMOS power tube herein, corresponding VFB and VREF needs reversal connection), two feedback resistance R1 and R2; Wherein, feedback resistance, error amplifier and PMOS power tube constitute the feedback adjusting loop of VR.During voltage regulator operation, reference source module output reference voltage VREF, error amplifier amplifies the difference of VFB and VREF, change the G end signal (output voltage EA_OUT) of PMOS power tube, change its conduction impedance, thus obtain stable output voltage VO UT(reference voltage VREF and play voltage stabilizing reference role under the input of different power supplys and load current conditions).The start-up course of voltage regulator can be divided into 2 parts, respectively: <1>, power up (power supply rises to the process of establishing of stationary value from no-voltage), now internal node voltages is indefinite, power tube conducting is also charged to load capacitance, power on electric current size and power supply sets up speed and magnitude of voltage is closely related, speed is faster, and voltage is higher, and VOUT overshoot and charged electrical fail to be convened for lack of a quorum larger.The process of establishing of <2>, loop work point.Adjustment loop compares feedback voltage and the reference voltage of VOUT, sets up working point.The speed of setting up of the value of quiescent point, load capacitance size and VOUT all may cause larger current overshoot.Shown in composition graphs 1, RL represents pull-up resistor, and CL is load capacitance, and the surge current when CL is larger in start-up course is more remarkable; When CL is less, in start-up course, overshoot voltage is more remarkable.
Soft Starting Technology, then for eliminating overshoot voltage (OvershootVoltage) in voltage regulator start-up course and surge current (InrushCurrent).But, existing soft Starting Technology encounters difficulty in following background: the system electrification time of (1) PnP device reaches 10nS rank at (Time Created of chip power), when prior art is unable to cope with fast powering-up, VR especially Cap-lessVR overshoot voltage impact, damage utilize VR to power circuit; (2) when extremely fast powering on, VR may exist larger immediate current to be impacted, and causes power tube to enter breech lock (LatchUp) state, the circuit of damage VR own.(3) in some portable equipment, be provided with restrictive supply standard, comprise instantaneous power demands to SOC, this is one of entry criteria becoming market.If do not controlled the moment surge current of VR, SOC may be caused normally to work.
Summary of the invention
The main technical problem to be solved in the present invention is, provides a kind of soft starting device and method, and it in the moment of device power, can eliminate voltge surge.
For solving the problems of the technologies described above, the invention provides a kind of soft starting device, comprise voltage modulator circuit and Voltage Establishment rate control module, be provided with in described voltage modulator circuit connect power access end power tube and for regulating the error amplifier of described power tube conducting resistance; Described Voltage Establishment rate control module, for controlling the output voltage of described error amplifier, makes the output voltage of described voltage modulator circuit rise to stationary value when circuit is set up by set rate.
During enforcement, also can comprise the current control module that powers on, described in power on current control module for detect power access end whether have power supply input, with have at described power access end power supply input time control the conducting after the schedule time of described power tube.
A kind of soft starting device, comprises voltage modulator circuit, is provided with the power tube that connects power access end and for regulating the error amplifier of described power tube conducting resistance in described voltage modulator circuit; Also comprise power on current control module and the Voltage Establishment rate control module being connected described error amplifier; Whether the described current control module that powers on has external power source input for detecting power access end, controls described power tube conducting after the schedule time (setting up circuit) during to have external power source input at described power access end; Described Voltage Establishment rate control module is for controlling the output voltage of described error amplifier, and with after described power tube conducting, the output voltage controlling described voltage modulator circuit rises to stationary value by set rate.
A kind of soft-start method, for voltage modulator circuit, power tube for accessing power access end is provided with and for regulating the error amplifier of described power tube conducting resistance, also comprise Voltage Establishment rate control module, the method step is in described voltage modulator circuit:
The output voltage of described Voltage Establishment rate control module to described error amplifier controls;
When circuit is set up, described Voltage Establishment rate control module is by described output voltage, and the output voltage controlling described voltage modulator circuit rises to stationary value by set rate.
During enforcement, also comprise the current control module that powers in described voltage modulator circuit, the method also comprises step:
The described current control module that powers on detects power access end;
When detecting that described power access end has power supply input, described in the current control module that powers on control the conducting after the schedule time of described power tube, realizing circuit is set up.
The invention has the beneficial effects as follows: a kind of soft starting device and method, this device by setting up Voltage Establishment rate control module on the basis of existing voltage modulator circuit, for controlling the output voltage of described error amplifier, the output voltage of voltage modulator circuit is made to rise to stationary value when circuit is set up by set rate; Namely corresponding method rises to stationary value by the output voltage of voltage modulator circuit by set rate; This solution avoids the voltage and current after power tube conducting to impact, reduce the transient current in loop work point process of establishing.
Further, this device comprises the current control module that powers on, whether the current control module that powers on has power supply input for detecting power access end, and when having power supply input, power tube conducting after the schedule time of control voltage regulator accesses described power access end; Namely corresponding method when detecting that described power access end has power supply input, controls the conducting after the schedule time of described power tube; This device and method detect power access end to power tube conducting access power supply eliminate fast powering-up during this period of time time voltage overshoot and surge current, protect circuit.
Accompanying drawing explanation
Fig. 1 is existing voltage modulator circuit schematic diagram;
Fig. 2 A is the principle schematic of an embodiment of the present invention;
Fig. 2 B is applied to the schematic diagram of voltage regulator shown in Fig. 1 for Fig. 2 A illustrated embodiment;
Fig. 3 A is Fig. 2 A embodiment further circuit theory schematic diagram;
Fig. 3 B is applied to the schematic diagram of voltage regulator shown in Fig. 1 for Fig. 3 A illustrated embodiment;
Fig. 4 is the circuit diagram of current control module of powering in previous embodiment;
Fig. 5 is the circuit diagram of Voltage Establishment rate control module in previous embodiment;
Fig. 6 is the simulation waveform figure that powers on of the voltage regulator chip that the present invention realizes.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
As shown in Figure 2 A, a kind of soft starting device, comprise voltage modulator circuit 14 and Voltage Establishment rate control module 11, be provided with in described voltage modulator circuit 14 connect power access end power tube 13 and for regulating the error amplifier 12 of described power tube 13 conducting resistance; Described Voltage Establishment rate control module 11, for controlling the output voltage EA_OUT of described error amplifier 12, makes the output voltage VO UT of described voltage modulator circuit 14 rise to stationary value when circuit is set up by set rate.This circuit works after the current control circuit that powers on, for reducing the transient current in loop work point process of establishing.
Described stationary value, refers to that error amplifier 12 controls produced output voltage VO UT independent of Voltage Establishment rate control module 11 pairs of power tubes 13.
When circuit is set up, refer to the moment starting output voltage VO UT at voltage modulator circuit 14, the process rising to stationary value by set rate is the continuity backward of this time point.
During enforcement, the output voltage VO UT of voltage modulator circuit 14 presses set rate and rises, and can be controlled the output voltage EA_OUT of described error amplifier 12, thus the mode changing the resistance of power tube 13 realizes by Voltage Establishment rate control module 11.
Shown in composition graphs 3A, 5, during enforcement, described Voltage Establishment rate control module 11 comprises the tenth PMOS 111(M10) and the slow raised voltage source 112 that is connected on the tenth PMOS 111 grid, described slow raised voltage source 112 exports the voltage SS_CTRL pressing set rate and rise, the conducting resistance controlling described tenth PMOS 111 rises in described set rate by geometric ratio, until the tenth PMOS 111 blocks.
When implementing, slow raised voltage source 112 just can start output voltage when power access end VIN have power supply input, also can At All Other Times, such as output voltage after power tube 13 is opened.Corresponding, if slowly raised voltage source 112 starts output voltage when power access end VIN has power supply input, 112, slow raised voltage source also can be used for detecting power access end VIN, and when detecting that described power access end VIN has power supply input, control described slow raised voltage source 112 output voltage.Corresponding, if slow raised voltage source 112 output voltage after power tube 13 is opened, then slowly 112, raised voltage source also can be used for detection power pipe 13 on off state.
During enforcement, described error amplifier 12 comprises the differential pair tube 121 be made up of two metal-oxide-semiconductors, two grids external reference source VREF(reference voltage respectively of differential pair tube 121) and voltage feedback signal VFB; The source electrode of described tenth PMOS 111 and drain electrode correspondence are connected to the source electrode of a metal-oxide-semiconductor of the external reference source VREF of differential pair tube 121 with in drain electrode.
Described slow raised voltage source 112 comprises the second mirror image circuit 1121 and the 3rd electric capacity C3; Described second mirror image circuit 1121 external power supply incoming end VIN and bias current IB_SS, and export the second image current I2 corresponding to this bias current IB_SS, another extremely external ground wire VSS of the 3rd electric capacity C3 to described 3rd electric capacity C3; The link of described 3rd electric capacity C3 and described second mirror image circuit 1121 is the output terminal of the described voltage source 112 risen by set rate.
Embodiment as shown in Figure 5, differential pair tube 121 is made up of the 11 PMOS M11 and the 12 PMOS M12, and the external reference source VREF of grid, the source electrode of the 11 PMOS M11 are connected with the source electrode of the tenth PMOS 111, draining is connected with the drain electrode of the 11 PMOS M11 the tenth PMOS 111; The breadth length ratio of described tenth PMOS 111 in described Voltage Establishment rate control module 11 is greater than the breadth length ratio of described 11 PMOS M11 and the 12 PMOS M12.Wherein, breadth length ratio difference is larger, and effect is more obvious.
Concrete, as shown in Fig. 1,2B, 3B, between the output terminal electrode of described voltage modulator circuit 14, be also provided with two feedback resistances R1, R2 of serial connection.Described feedback resistance, power tube 13 and error amplifier 12 form VR feedback adjusting loop, the described voltage feedback signal VFB i.e. negative feedback input signal of this VR adjustment loop (voltage feedback signal VFB is the dividing potential drop of R1 and R2 to VOUT).Its signal stream is: error amplifier 12 output voltage EA_OUT is passed to the grid of power tube 13, thus change the output end voltage VOUT of voltage modulator circuit 14, between two feedback resistances R1, R2, the magnitude of voltage of tie point inputs described error amplifier 12 as negative feedback input signal, thus the output voltage of regulating error amplifier 12.
During enforcement, this soft starting device also comprises set rate and arranges module, for the schedule time (scheme section with reference to hereafter setting up the current control module 10 that powers on) according to described conducting power pipe 13, the size of described second image current I2 and the size of the 3rd electric capacity C3 are set, thus change the size of described set rate.
More specifically, composition graphs 5, the principle of work of Voltage Establishment rate control module 11 is, the voltage SS_CTRL utilizing a road to rise by set rate and reference source VREF controls output voltage simultaneously.Be characterized in that both do not exist the handoff procedure of switching regulator.Slowly set up by the output voltage VO UT of the voltage SS_CTRL control voltage adjuster circuit 14 of set rate rising in start-up course, this mainly relies on the size difference of the tenth PMOS the 111 and the 11 PMOS M11 and the negative feedback voltage VFB of VR adjustment loop to be used for realizing.
During enforcement, concrete, the breadth length ratio of described tenth PMOS 111 is greater than the breadth length ratio of described 11 PMOS M11 and the 12 PMOS M12, in start-up course, flow through the electric current of the tenth PMOS 111 electric current much larger than the 11 PMOS M11, the tenth PMOS the 111 and the 12 PMOS M12 forms substantial Differential Input to pipe; The current capacity of the tenth PMOS 111 is greater than the 12 PMOS M12, and system exists input imbalance Vos(due to negative feedback, and dividing potential drop VFB and the SS_CTRL-Vos of output voltage VO UT is equal), there is formula in start-up course:
Vos is the system input offset voltage of error amplifier, when the breadth length ratio of the tenth PMOS 111 is greater than 12 PMOS M12, Vos be on the occasion of.
Concrete, charging current (the second image current I2) is charged to the 3rd electric capacity C3, and the voltage SS_CTRL risen by set rate rises, and output voltage VO UT equal proportion rises.Therefore, change the size of the second image current I2 and the 3rd electric capacity C3, the accurate control that output voltage VO UT sets up speed can be realized.
The voltage SS_CTRL risen along with set rate rises further, and the electric current flowing through the tenth PMOS 111 is slowly reduced to zero, and the tenth PMOS 111 is opened from loop interrupt, and error amplifier recovers normal operating conditions, and output voltage VO UT is stabilized in setting value.The time that error amplifier is switched to normal operating conditions is determined jointly by the source voltage terminal of the second image current I2, the 3rd electric capacity C3 and the tenth PMOS 111, has nothing to do with the size of output voltage VO UT.The output voltage VO UT expression formula of steady state (SS):
During enforcement, in the domain of integrated circuit, differential pair tube the 11 PMOS M11, the 12 PMOS M12 need be dummy to ensure good coupling, and the tenth PMOS 111 can utilize dummy pipe to realize, and reduces extra chip area consumption.
During enforcement, the top crown voltage (as Fig. 4) of the second electric capacity C2 powered in current control module 10 can be utilized as control signal, as the second image current I2(as Fig. 5) current switch; After bias current IB_SS reaches a period of time to the second electric capacity C2 charging, the second image current I2 electric current is just allowed to start charging.
During enforcement, a circuit can be added, regulate the time of power on current control module 10 and Voltage Establishment rate control module 11 two module works.
With reference to a kind of soft starting device shown in Fig. 1,2A, also the current control module 10 that powers on can be comprised.Whether the current control module that powers on 10 has power supply input for detecting power access end VIN, and when detecting that power supply inputs, first power tube 13 is closed, after the schedule time, then open conducting power pipe 13 again make voltage modulator circuit 14 access power supply (controlling the input power of power tube 13 conducting access power access end VIN after the schedule time).After power tube 13 conducting (circuit foundation), the effect that the output voltage VO UT that aforesaid Voltage Establishment rate control module 11 just starts to play control voltage adjuster circuit 14 rises.
During enforcement, shown in composition graphs 3A, 3B, described power tube 13 is metal-oxide-semiconductor, described in the current control module 10 that powers on comprise switch element 102 and control module 101; Described switch element 102 is connected between described power access end VIN and the grid of described power tube 13; Described control module 101 connects described power access end and described switch element 102, control described switch element 102 described power access end have power supply input after described schedule time conducting or closedown, the grid of described power tube 13 and described power access end VIN are turned on or off, thus realize the conducting of described power tube 13.
During enforcement, as shown in Fig. 2 B, 3B, Fig. 4, described power tube 13 is all PMOS or NMOS tube with switch element 102; The source electrode of described switch element and drain electrode are connected between described power access end VIN and the grid of described power tube 13, realize the switch control rule of the grid of power access end VIN and power tube 13.
Fig. 3 B, embodiment illustrated in fig. 4 in, power tube 13 and switch element 102 (the first PMOS M1) are PMOS.
As described in Figure 4, control module 101 controls to comprise the first mirror image circuit 1011, first electric capacity C1, the second electric capacity C2 and impact damper 1012; One end of described first electric capacity C1, the second electric capacity C2 all connects ground wire VSS, and the other end of described first electric capacity C1 accesses the grid of described switch element 102, and the other end of described second electric capacity C2 connects the output terminal of described first mirror image circuit 1011; Described first mirror image circuit 1011 external power supply incoming end VIN and bias current IB_SS exports to described second electric capacity C2 the first image current Ic corresponding to this bias current IB_SS; Described impact damper 1012 is connected to described power access end VIN and ground wire VSS, and for being passed to the grid of described switch element 102 after described first mirror image circuit 1011 is converted to digital signal with described second electric capacity C2 junction signal.
During enforcement, this soft starting device also can comprise the schedule time and arrange module; Described impact damper 1012 forms (embodiment as shown in the figure by least two phase inverters, comprise the first phase inverter 10121 and the second phase inverter), the first phase inverter 10121 be wherein directly connected with described second electric capacity C2 includes the 4th PMOS M4 and the 5th NMOS tube M5; It is one or more for what arrange in the threshold voltage (realizing the voltage blocked) of the size of described first image current Ic, the size of the second electric capacity C2, the threshold voltage (realizing the voltage of conducting) of the 4th PMOS M4 and the 5th NMOS tube M5 that the described schedule time arranges module, thus change the described schedule time.
More specifically, the principle of work of the current control module that powers on 10, shown in 2B, 4, switch element 102(M1) grid terminal voltage given by the first electric capacity C1, thus the indefinite state eliminated in power up, guarantee switch element 102 conducting and the output voltage EA_OUT of error amplifier 12 drawn high the input voltage of power access end VIN, closing power tube 13.Base modules is started working subsequently, bias current IB_SS produces, first image current Ic charges to the second electric capacity C2, second electric capacity C2 top crown voltage progressively rises, and final plant closure switch element 102, the output voltage EA_OUT of release error amplifier 12, the feedback adjusting loop of VR enters the process of establishing of quiescent point.The size (referring to the cut-in voltage of the size of the size of the first image current Ic, the second electric capacity C2, the cut-in voltage of the 4th PMOS M4 and the 5th NMOS tube M5 respectively) of the second electric capacity C2, the first image current IC, the 4th PMOS M4, the 5th NMOS tube M5 determines the release time (schedule time) of power tube jointly.Computing formula is as follows:
T_Release=VM*C2/Ic
Wherein VM is the mid point level that M4 and M5 forms phase inverter.
VTp, VTn are respectively the threshold voltage of M4 and M5; β p, β n is and the size Physics amount of M4, M5.
During enforcement, as Fig. 5 impact damper forms (namely four metal-oxide-semiconductors M4, M5, M6, M7 form) formation by least two phase inverters, it can prevent switch element 102 abnormal after power tube release.When the power supply of power access end VIN input in normal range significantly Rapid Variable Design time, due to the 6th PMOS M6 conducting, the power supply input change of power access end VIN followed by the first electric capacity C1 top crown, thus ensures that switch element 102 ends all the time.
The input power that the current control circuit that powers on is applied to power access end VIN is raised to the process of establishing of stationary value from above freezing, closes the power tube of voltage regulator; Be characterized in that control effects does not need to detect output voltage VO UT, the response time is extremely short, thus can be applicable to the extremely fast process of establishing of the power access end VIN of 10ns rank.
When implementing, the ascending velocity passing through the voltage SS_CTRL by set rate rising when comprehensive measurement power tube 13 discharges release time that a Voltage Establishment rate control module 11 is suitable, also will by comprehensive release time (release time that the current control circuit that powers on determines) and the VR(voltage modulator circuit of weighing power tube 13) load capacitance CL size set, to limit the surge current peak value of moment.
A kind of soft starting device embodiment as described in figs. 2-6, namely carries out power on Current Control and Voltage Establishment speeds control simultaneously.Specifically comprise voltage modulator circuit 14, be provided with in voltage modulator circuit 14 connect power access end power tube 13 and for regulating the error amplifier 12 of described power tube 13 conducting resistance; Also comprise power on current control module 10 and the Voltage Establishment rate control module 11 being connected described error amplifier 12; Whether the described current control module 10 that powers on has external power source input for detecting power access end, controls the conducting after the schedule time of described power tube 13 during to have external power source input at described power access end; Described Voltage Establishment rate control module 11 is for controlling the output voltage of described error amplifier 12, and with after the conducting of described power tube 13, the output voltage controlling described voltage modulator circuit 14 rises to stationary value by set rate.
With reference to aforementioned means, a kind of soft-start method, for voltage modulator circuit, power tube 13 for accessing power access end VIN is provided with and for regulating the error amplifier 12 of described power tube 13 conducting resistance in described voltage modulator circuit 14, also comprise Voltage Establishment rate control module 11, the method step is: the output voltage EA_OUT of described Voltage Establishment rate control module 11 to described error amplifier 12 controls; When circuit is set up (power tube conducting or say power tube turn-on power), described Voltage Establishment rate control module 11 is by the output voltage of described error amplifier 12, and the output voltage VO UT controlling described voltage modulator circuit 14 rises to stationary value when circuit is set up by set rate.
During enforcement, described error amplifier 12 comprises the differential pair tube 121 be made up of two metal-oxide-semiconductors, two grids external reference source VREF and voltage feedback signal VFB respectively of differential pair tube 121; The step of the output voltage EA_OUT of the described error amplifier of described control 12 is: when described power access end has power supply input, namely arranges a voltage SS_CTRL risen by set rate of place in circuit; Voltage SS_CTRL that (can refer to hereinafter described after power tube 13 conducting) should rise by set rate when circuit is set up substitute described reference source VREF; After described output voltage VO UT rises to stationary value, described in cutting off, press the access of the voltage SS_CTRL that set rate rises, recover the voltage stabilizing reference role of reference source VREF.
During enforcement, the access of the described voltage SS_CTRL risen by set rate with cut through a PMOS and realize.
Concrete, should press in the voltage SS_CTRL uphill process of set rate rising, have the magnitude of voltage higher than the threshold voltage of controlled PMOS, after rising to this magnitude of voltage according to set rate, the PMOS controlled closes, and error amplifier 12 recovers original control procedure.
During enforcement, also comprise the current control module 10 that powers in described voltage modulator circuit 14, this soft-start method also can comprise step: described in the current control module 10 that powers on detect power access end VIN; When the power supply input described power access end VIN being detected, described in the current control module 10 that powers on control the conducting after the schedule time of described power tube 13 and access described power access end VIN, namely realize described circuit and set up.
During enforcement, by controlling described plant-grid connection end signal to be converted to switching signal, and exporting the mode of this signal intensity to described power tube 13 in the schedule time, realize described power tube 13 and change conducting state into by closed condition.
During enforcement, the described schedule time, by the electric capacity of constant-current charge, its voltage rise to the time of predetermined value defines (see aforementioned computing formula).
During enforcement, Voltage Establishment rate control module 11 suitable release time, also will by comprehensive release time (release time that the current control circuit that powers on determines) and the VR(voltage modulator circuit of weighing power tube 13 by the comprehensive ascending velocity weighing the voltage SS_CTRL risen by set rate when power tube 13 discharges) load capacitance CL size set.Ensure the reference voltage of voltage SS_CTRL at least in power tube 13 conducting moment lower than reference source VREF risen by set rate, to reduce power tube On current now.
During enforcement, the inventive method can be expanded with reference to aforesaid device.
As shown in Figure 6 based on the simulation waveform that powers on of the voltage regulator chip of the present invention's realization, based on the signature waveform of VR of the present invention when plug powers on, output voltage VO UT remains zero (power tube is closed) in a period of time after the power-up, the input current peak value of power supply is less than 3mA, after power tube release, due to the effect of feedback, electric resistance partial pressure i.e. (the voltage feedback signal VFB) of output voltage VO UT followed by the voltage SS_CTRL signal risen by set rate and rises, and always there is the difference of input imbalance VOS; Thus ensureing that output voltage VO UT slowly sets up under the control of the voltage SS_CTRL signal risen by set rate, current peak also controls, for being about 13mA, to be well controlled.
During enforcement, apparatus of the present invention and method are applicable to the voltage regulator structure utilizing NMOS as power tube; Be applicable to the linear model charge pump circuit of regulating power pipe or non-loaded capacitance-voltage conversion circuit.
Apparatus of the present invention and method tool have the following advantages: <1>, the present invention can eliminate voltage overshoot and surge current phenomenon simultaneously, realize the mild foundation of output voltage, limiting input current peak value.<2>, the present invention are particularly useful for the situation of the voltage regulator (CaplessVR) without external load capacitance.<3>, the present invention are applicable to the start-up course under various power-up speeds, electrifying startup process especially extremely fast.<4>, structure of the present invention are simple, multiplexing as far as possible VR(voltage modulator circuit) circuit component, adjustment loop does not increase impedance and capacitive reactance, maintains the response speed of VR.In <5>, the present invention, the speed of setting up of soft start-up process and reference voltage (reference source VREF) has nothing to do.<6>, the present invention do not need the output voltage VO UT detecting voltage modulator circuit 14 to the switching of the soft start state and adjustment state that realize voltage regulator, soft starting circuit setting time point automatically and VR adjustment loop disconnect.
Above content is in conjunction with concrete embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (17)
1. a soft starting device, it is characterized in that, comprise voltage modulator circuit (14) and Voltage Establishment rate control module (11), be provided with in described voltage modulator circuit (14) connect power access end power tube (13) and for regulating the error amplifier (12) of described power tube (13) conducting resistance; Described Voltage Establishment rate control module (11) for controlling the output voltage of described error amplifier (12), make the output voltage of voltage modulator circuit (14) power access end have power supply be input to power tube conducting access power supply rise to stationary value by set rate during this period of time.
2. soft starting device as claimed in claim 1, it is characterized in that, described Voltage Establishment rate control module (11) comprises the tenth PMOS (111) and is connected to the slow raised voltage source (112) on the tenth PMOS (111) grid, described slow raised voltage source (112) output presses the voltage that set rate rises, the conducting resistance geometric ratio controlling described tenth PMOS (111) rises in described set rate, until described tenth PMOS (111) blocks.
3. soft starting device as claimed in claim 2, it is characterized in that, described error amplifier (12) comprises the differential pair tube (121) be made up of two metal-oxide-semiconductors, two grids external reference source and voltage feedback signal respectively of differential pair tube (121); The source electrode of described tenth PMOS (111) and drain electrode correspondence are connected to the source electrode of a metal-oxide-semiconductor of differential pair tube (121) external reference source with in drain electrode.
4. soft starting device as claimed in claim 3, it is characterized in that, described slow raised voltage source (112) comprises the second mirror image circuit (1121) and the 3rd electric capacity; The link of described 3rd electric capacity and described second mirror image circuit (1121) is the output terminal of the described voltage source (112) risen by set rate; Described second mirror image circuit (1121) external power supply incoming end and bias current, and export the second image current corresponding to this bias current, another extremely external ground wire of the 3rd electric capacity to described 3rd electric capacity.
5. soft starting device as claimed in claim 4, it is characterized in that, described differential pair tube (121) is made up of the 11 PMOS and the 12 PMOS, and the external reference source of grid, the source electrode of described 11 PMOS are connected with the source electrode of the tenth PMOS (111), draining is connected with the drain electrode of the tenth PMOS (111); The breadth length ratio of described tenth PMOS (111) in described Voltage Establishment rate control module (11) is greater than the breadth length ratio of described 11 PMOS and the 12 PMOS.
6. soft starting device as claimed in claim 5, is characterized in that, be also provided with two feedback resistances of serial connection between the output terminal of described voltage modulator circuit (14); Described error amplifier (12) output voltage is to power tube (13) grid, thus changing the output end voltage of voltage modulator circuit (14), the magnitude of voltage between two feedback resistances inputs described error amplifier (12) as negative feedback input signal.
7. the soft starting device as described in any one of claim 1 to 6, it is characterized in that, this soft starting device also comprises the current control module that powers on (10), whether the described current control module that powers on (10) has power supply input for detecting power access end, controls described power tube (13) conducting after the schedule time during to have power supply input at described power access end.
8. the soft starting device as described in any one of claim 4 to 6, it is characterized in that, this soft starting device also comprises set rate and arranges module, for the schedule time according to described power tube (13), the size of described second image current and the size of the 3rd electric capacity are set, thus change the size of described set rate.
9. soft starting device as claimed in claim 7, it is characterized in that, described power tube (13) is metal-oxide-semiconductor, described in the current control module (10) that powers on comprise switch element (102) and control module (101); Described switch element (102) is connected between the grid of described power access end and described power tube (13); Described control module (101) connects described power access end and described switch element (102), control described switch element (102) described power access end have power supply input after described schedule time conducting or closedown, the grid of described power tube (13) and described power access end are turned on or off, thus realize the conducting of described power tube (13).
10. soft starting device as claimed in claim 9, is characterized in that, described power tube (13) and switch element (102) are all PMOS or NMOS tube; The source electrode of described switch element and drain electrode are connected between the grid of described power access end and described power tube (13).
11. soft starting devices as claimed in claim 10, is characterized in that, described control module (101) comprises the first mirror image circuit (1011), the first electric capacity, the second electric capacity and impact damper (1012); One end of described first electric capacity, the second electric capacity all connects ground wire, the other end of described first electric capacity accesses the grid of described switch element (102), and the other end of described second electric capacity connects the output terminal of described first mirror image circuit (1011); Described first mirror image circuit (1011) external power supply incoming end and bias current export to described second electric capacity the first image current corresponding to this bias current; Described impact damper (1012) is connected to described power access end and ground wire, and for being passed to the grid of described switch element (102) after described first mirror image circuit (1011) and described second electric capacity junction signal are converted to digital signal.
12. soft starting devices as claimed in claim 11, is characterized in that, this soft starting device also comprises the schedule time and arranges module; Described impact damper (1012) comprises the first phase inverter (10121) and the second phase inverter, and described first phase inverter (10121) is connected with described second electric capacity, and it comprises the 4th PMOS and the 5th NMOS tube; It is one or more for what arrange in the cut-in voltage of the size of described first image current, the size of the second electric capacity, the cut-in voltage of the 4th PMOS and the 5th NMOS tube that the described schedule time arranges module.
13. 1 kinds of soft-start methods, for voltage modulator circuit (14), power tube (13) for accessing power access end is provided with and for regulating the error amplifier (12) of described power tube (13) conducting resistance in described voltage modulator circuit (14), it is characterized in that, also comprise Voltage Establishment rate control module (11), the method step is:
The output voltage of described Voltage Establishment rate control module (11) to described error amplifier (12) controls;
At power access end, there is power supply and be input to power tube conducting access power supply during this period of time, described Voltage Establishment rate control module (11) is by described output voltage, and the output voltage controlling described voltage modulator circuit (14) rises to stationary value by set rate.
14. soft-start methods as claimed in claim 13, it is characterized in that, described error amplifier (12) comprises the differential pair tube (121) be made up of two metal-oxide-semiconductors, two grids external reference source and voltage feedback signal respectively of differential pair tube (121); The step of the output voltage of the described error amplifier of described control (12) is: when described power access end has power supply input, arranges the voltage risen by set rate of place in circuit; When circuit is set up, the voltage that should rise by set rate substitutes described reference source; After described output voltage rises to stationary value, described in cutting off, press the access of the voltage that set rate rises, recover the voltage stabilizing reference role of reference source.
15. soft-start methods as described in claim 13 or 14, it is characterized in that, also comprise the current control module that powers on (10) in described voltage modulator circuit (14), the method also comprises step:
The described current control module that powers on (10) detects power access end;
When detecting that described power access end has power supply input, described in the current control module (10) that powers on control described power tube (13) conducting after the schedule time, realizing circuit is set up.
16. soft-start methods as claimed in claim 15, it is characterized in that, by controlling described plant-grid connection end signal to be converted to switching signal, and be changed to described power tube (13) mode in schedule time output signal, realize described power tube (13) and change conducting state into by closed condition; The described schedule time is the time of its voltage rise of electric capacity to predetermined value of a constant-current charge.
17. 1 kinds of soft starting devices, it is characterized in that, comprise voltage modulator circuit (14), be provided with in described voltage modulator circuit (14) connect power access end power tube (13) and for regulating the error amplifier (12) of described power tube (13) conducting resistance; Also comprise the current control module that powers on (10) and the Voltage Establishment rate control module (11) being connected described error amplifier (12); Whether the described current control module that powers on (10) has external power source input for detecting power access end, controls described power tube (13) conducting after the schedule time during to have external power source input at described power access end; Described Voltage Establishment rate control module (11) is for controlling the output voltage of described error amplifier (12), with after described power tube (13) conducting, the output voltage controlling described voltage modulator circuit (14) rises to stationary value by set rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210233862.XA CN103529891B (en) | 2012-07-06 | 2012-07-06 | A kind of soft starting device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210233862.XA CN103529891B (en) | 2012-07-06 | 2012-07-06 | A kind of soft starting device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103529891A CN103529891A (en) | 2014-01-22 |
| CN103529891B true CN103529891B (en) | 2016-03-30 |
Family
ID=49931976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210233862.XA Active CN103529891B (en) | 2012-07-06 | 2012-07-06 | A kind of soft starting device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103529891B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529890B (en) * | 2012-07-06 | 2016-08-03 | 国民技术股份有限公司 | A kind of soft starting device and method |
| CN106998150A (en) * | 2017-04-14 | 2017-08-01 | 济南浪潮高新科技投资发展有限公司 | A kind of constant-current source and implementation method suppressed based on transient state with soft start |
| CN107678481B (en) * | 2017-10-09 | 2018-11-20 | 江苏先云信息技术有限公司 | Unmanned photoelectricity soft-sphere model constant-current circuit, integrated circuit and control system |
| CN108110822B (en) * | 2017-11-27 | 2021-06-11 | 中国北方车辆研究所 | High-voltage direct-current stepped constant-current closed-loop pre-charging circuit |
| CN111367341B (en) * | 2018-12-26 | 2022-07-01 | 北京兆易创新科技股份有限公司 | Reference voltage generating circuit and NAND chip |
| TWI699539B (en) * | 2018-12-28 | 2020-07-21 | 新唐科技股份有限公司 | Io-pin abnormal detecting system and method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070194768A1 (en) * | 2005-11-29 | 2007-08-23 | Stmicroelectronics Pvt. Ltd. | Voltage regulator with over-current protection |
| US20090027028A1 (en) * | 2007-07-27 | 2009-01-29 | Niko Semiconductor Co., Ltd. | Pulse width modulated controller applied to switch-type voltage regulator |
| US20090174385A1 (en) * | 2008-01-04 | 2009-07-09 | Integrated Memory Logic, Inc. | Integrated soft start circuits |
| CN101714813A (en) * | 2009-12-15 | 2010-05-26 | 天水华天微电子股份有限公司 | Soft start circuit of switch power supply |
| CN101989809A (en) * | 2009-07-29 | 2011-03-23 | 立锜科技股份有限公司 | Soft-start circuit for switch-type regulator and method thereof |
-
2012
- 2012-07-06 CN CN201210233862.XA patent/CN103529891B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070194768A1 (en) * | 2005-11-29 | 2007-08-23 | Stmicroelectronics Pvt. Ltd. | Voltage regulator with over-current protection |
| US20090027028A1 (en) * | 2007-07-27 | 2009-01-29 | Niko Semiconductor Co., Ltd. | Pulse width modulated controller applied to switch-type voltage regulator |
| US20090174385A1 (en) * | 2008-01-04 | 2009-07-09 | Integrated Memory Logic, Inc. | Integrated soft start circuits |
| CN101989809A (en) * | 2009-07-29 | 2011-03-23 | 立锜科技股份有限公司 | Soft-start circuit for switch-type regulator and method thereof |
| CN101714813A (en) * | 2009-12-15 | 2010-05-26 | 天水华天微电子股份有限公司 | Soft start circuit of switch power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103529891A (en) | 2014-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103529890B (en) | A kind of soft starting device and method | |
| CN103529891B (en) | A kind of soft starting device and method | |
| CN101795070B (en) | System for linearly adjusting slope compensation voltage slope | |
| KR102418710B1 (en) | charging device and terminal | |
| CN101872207A (en) | Voltage modulator circuit | |
| CN206117499U (en) | Start circuit | |
| CN206422685U (en) | A kind of soft starting circuit for suppressing surge current | |
| CN103219893B (en) | Switch power controller and switching power circuit | |
| WO2021233318A1 (en) | Passive cms equalization circuit and method based on super-capacitor | |
| CN201656778U (en) | System for linearly adjusting slope of slope compensation voltage | |
| CN104065077A (en) | Control method of series voltage compensation device | |
| CN204886175U (en) | Antisurge module | |
| CN103326315B (en) | A kind of under-voltage protecting circuit and high voltage integrated circuit | |
| CN105006860B (en) | A kind of equalizer circuit of controllable charge and discharge device and the super capacitor based on this device | |
| CN103324237A (en) | Low dropout regulator (LDO) transient response enhancing circuit based on voltage induction | |
| CN103631298A (en) | Linear voltage stabilization source | |
| CN205960636U (en) | Surge current control circuit and power supply unit | |
| CN101364797B (en) | Active voltage clamping grid driver circuit | |
| CN204652214U (en) | A kind of little ripple DC conversion power | |
| CN103427617A (en) | Power supply circuit | |
| CN101145065A (en) | Switching type voltage stabilizing device with over current protection | |
| CN203660879U (en) | Constant current/constant voltage converter based on PWM modulation | |
| CN105846663A (en) | operating system and control method | |
| CN202696555U (en) | High-precision RC (Resistance Capacitance) oscillator and remote controller with built-in high-precision RC oscillator | |
| CN114740933A (en) | Internal reference power rail control circuit for high-voltage LDO (low dropout regulator) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |