CN103529890B - A kind of soft starting device and method - Google Patents
A kind of soft starting device and method Download PDFInfo
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- CN103529890B CN103529890B CN201210233704.4A CN201210233704A CN103529890B CN 103529890 B CN103529890 B CN 103529890B CN 201210233704 A CN201210233704 A CN 201210233704A CN 103529890 B CN103529890 B CN 103529890B
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Abstract
The invention discloses a kind of soft starting device and method, it is adaptable to voltage regulator, especially without capacitance voltage actuator.This device is by setting up, on the basis of existing voltage modulator circuit, the current control module that powers on, the current control module that powers on is for detecting power access end, and when detecting that described power access end has power supply input, the power tube controlling voltage regulator turns on access power supply after the scheduled time；Corresponding method is i.e. detecting described power access end, controls described power tube and turns on the described power supply of access after the scheduled time；This device and method accesses voltage overshoot when eliminating fast powering-up during this period of time and the surge current of power supply at electric power starting to power tube, protects circuit.
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 actuator (Cap-lessVR).
Background technology
Voltage regulator apparatus has the advantages such as low in energy consumption, outer member is few, electromagnetic interference 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, the power consumption requirements increasingly stringent to SOC, it is widely applied without external capacitive voltage regulator.Shown in Figure 1, the circuit unit of voltage regulator generally includes: an a reference source VREF(reference voltage), an error amplifier 12(ErrorAmplifier), a PMOS power tube 13(enhanced power PMOS；May be used without enhancement mode NMOS power tube, corresponding VFB Yu VREF needs reversal connection herein), two feedback resistance R1 and R2；Wherein, feedback resistance, error amplifier and PMOS power tube constitute the feedback adjustment loop of VR.During voltage regulator operation, a reference source module output reference voltage VREF, error amplifier amplifies the difference of VFB Yu VREF, change the G end signal (output voltage EA_OUT) of PMOS power tube, change its conduction impedance, thus under different power supply inputs and load current conditions, obtain stable output voltage VO UT(reference voltage VREF play voltage stabilizing reference role).The start-up course of voltage regulator can be divided into 2 parts, respectively:<1>, power up (power supply sets up process from what no-voltage rose to stationary value), now internal node voltages is indefinite, load capacitance is also charged by power tube conducting, the size of electric current of powering on sets up speed with power supply and magnitude of voltage is closely related, speed is the fastest, and voltage is the highest, and VOUT crosses punching and charging current can be the biggest.<2>, loop work point set up process.Adjustment loop compares feedback voltage and the reference voltage of VOUT, sets up operating point.The value of quiescent point, load capacitance size and VOUT set up speed larger current all may be caused to cross punching.Shown in Fig. 1, RL represents load resistance, and CL is load capacitance, and when CL is bigger, the surge current in start-up course is more notable；When CL is less, in start-up course, overshoot voltage is more notable.
Soft Starting Technology, then for eliminating the overshoot voltage (OvershootVoltage) in voltage regulator start-up course and surge current (InrushCurrent).But, existing soft Starting Technology encounters difficulty in background below: the system electrification time (the setting up the time of chip power) of (1) PnP device reaches 10nS rank, when prior art is unable to cope with fast powering-up, the overshoot voltage impact of VR especially Cap-lessVR, damage utilizes the circuit that VR powers；(2) when extremely fast powering on, VR there may be bigger immediate current impact, causes power tube to enter breech lock (LatchUp) state, damages the circuit of VR own.(3) in some portable equipment, SOC is provided with restrictive supply standard, including instantaneous power demands, one of this entry criteria having become as market.Control if the moment surge current of VR is not done, SOC may be caused normally to work.
Summary of the invention
The main technical problem to be solved in the present invention is to provide a kind of soft starting device and method, and it can eliminate electric current and voltge surge in the moment of device power.
For solving above-mentioned technical problem, the present invention provides a kind of soft starting device, including voltage modulator circuit and the current control module that powers on, described voltage modulator circuit is provided with and connects the power tube of power access end and for regulating the error amplifier of described power tube conducting resistance；The described current control module that powers on is for detecting whether power access end has external power source input, to control described power tube turn on after the scheduled time when described power access end has external power source input.
This soft starting device also includes the Voltage Establishment rate control module connecting described error amplifier, described Voltage Establishment rate control module, for controlling the output voltage of described error amplifier, rises to stationary value by set rate controlling the output voltage of described voltage modulator circuit after described power tube turns on.
A kind of soft-start method, for voltage modulator circuit, described voltage modulator circuit is provided with for the power tube of external power supply incoming end with for regulating the error amplifier of described power tube conducting resistance, also include that the current control module that powers on, the method step are: described in power on current control module detection power access end；Detect described power access end have power supply input time, described in power on current control module control described power tube turn on after the scheduled time.
Described voltage modulator circuit also includes Voltage Establishment rate control module, described Voltage Establishment rate control module controls the output voltage of described error amplifier, thus after described power tube turns on, make the output voltage of described voltage modulator circuit rise to stationary value by set rate；Described power tube is changed into conducting state by closed mode, controls to be converted to described plant-grid connection end signal switching signal by the described current control module that powers on, and realizes in the mode being changed to described power tube in scheduled time output signal.
The described scheduled time, is its voltage of electric capacity of constant-current charge time of rising to predetermined value.
The invention has the beneficial effects as follows: a kind of soft starting device and method, this device is by setting up, on the basis of existing voltage modulator circuit, the current control module that powers on, the current control module that powers on, for detecting whether power access end has power supply to input, turns on the described power access end of access with the power tube of control voltage regulator when power access end has power supply input after the scheduled time；Corresponding method i.e. when power access end has power supply input, controls described power tube and turns on after the scheduled time；This device and method detecting that power access end accesses voltage overshoot when eliminating fast powering-up during this period of time and the surge current of power supply to power tube conducting, protects circuit.
Further, this device includes Voltage Establishment rate control module, and the output voltage controlling described voltage modulator circuit at described power tube after turning on rises to stationary value by set rate；Further, the method i.e. rises to stationary value by the output voltage of voltage modulator circuit by set rate；This solution avoids the voltage and current impact after power tube conducting, reduce the transient current during loop work point is set up.
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 the schematic diagram that Fig. 2 A illustrated embodiment is applied to voltage regulator shown in Fig. 1；
Fig. 3 A is Fig. 2 A embodiment further circuit theory schematic diagram；
Fig. 3 B is the schematic diagram that Fig. 3 A illustrated embodiment is applied to voltage regulator shown in Fig. 1；
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.
Detailed description of the invention
Combine accompanying drawing below by detailed description of the invention the present invention is described in further detail.
With reference to soft starting device a kind of shown in Fig. 1,2A, including voltage modulator circuit 14 and the current control module 10 that powers on.Voltage modulator circuit 14 is same as the prior art, is provided with connecting the power tube 13 of power access end VIN and for regulating the error amplifier 12 of power tube 13 conducting resistance.The current control module that powers on 10 is for detecting power access end VIN, and when detecting that external power source inputs, first power tube 13 is closed, after the scheduled time, be then then turned on conducting power pipe 13 make voltage modulator circuit 14 access power supply (control power tube 13 and turn on the input power accessing power access end VIN after the scheduled time).
During enforcement, shown in Fig. 3 A, 3B, described power tube 13 is metal-oxide-semiconductor, described in the current control module 10 that powers on include switch element 102 and control unit 101；Described switch element 102 is connected between described power access end VIN and the grid of described power tube 13；Described control unit 101 connects described power access end VIN and described switch element 102, control the described switch element 102 described scheduled time on and off after described power access end has power supply input, the grid making described power tube 13 is turned on or off with described power access end VIN, thus realizes 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, it is achieved the on-off control of the grid of power access end VIN and power tube 13.
In Fig. 3 B, embodiment illustrated in fig. 4, power tube 13 and switch element 102 (the first PMOS M1) are PMOS.
As described in Figure 4, control unit 101 includes first mirror image circuit the 1011, first electric capacity C1, the second electric capacity C2 and buffer 1012；Described first electric capacity C1, one end of the second electric capacity C2 all connect the other end of (external) ground wire VSS, described first electric capacity C1 and access the grid of described switch element 102, and the other end of described second electric capacity C2 connects the outfan 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 the first image current Ic corresponding to this bias current IB_SS to described second electric capacity C2；Described buffer 1012 is connected to described power access end VIN and ground wire VSS, and is transferred 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 may also include the scheduled time and arranges module；Described buffer 1012 is made up of at least two phase inverter, (embodiment as shown in the figure, including the first phase inverter 10121 and the second phase inverter), the first phase inverter 10121 being wherein directly connected with described second electric capacity C2 includes the 4th PMOS M4 and the 5th NMOS tube M5；The described scheduled time arranges one or more in the threshold voltage (realizing the voltage of blocking-up) arranging the size of described first image current Ic, the size of the second electric capacity C2, the threshold voltage voltage of conducting (realize) of the 4th PMOS M4 and the 5th NMOS tube M5 of module, thus changes the described scheduled time.
More specifically, the operation principle of the current control module that powers on 10, in conjunction with 2B, shown in 4, switch element 102(M1) grid terminal voltage gives by the first electric capacity C1, thus eliminate the indefinite state in power up, guarantee that switch element 102 turns on and drawn high by the output voltage EA_OUT of error amplifier 12 input voltage of power access end VIN, close power tube 13.Base modules is started working subsequently, bias current IB_SS produces, second electric capacity C2 is charged by the first image current Ic, second electric capacity C2 top crown voltage gradually rises, and final plant closure switch element 102, release error amplifier 12 output voltage EA_OUT, VR feedback adjustment loop enter quiescent point set up process.Second electric capacity C2, the first image current IC, the 4th PMOS M4, the size (referring to the size of the first image current Ic, the size of the second electric capacity C2, the cut-in voltage of the 4th PMOS M4 and the cut-in voltage of the 5th NMOS tube M5 respectively) of the 5th NMOS tube M5 have together decided on the release time (scheduled time) of power tube.Computing formula is as follows:
T_Release=VM*C2/Ic
Wherein VM is M4 and the mid point level of M5 composition phase inverter.
VTp, VTn are respectively the threshold voltage of M4 and M5；β p, β n is and M4, the relevant physical quantity of size of M5.
During enforcement, as Fig. 5 buffer is formed (i.e. four metal-oxide-semiconductors M4, M5, M6, M7 form) composition by least two phase inverter, it can prevent switch element 102 abnormal after power tube discharges.When the significantly Rapid Variable Design within normal range that the power supply of power access end VIN inputs, 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 current control circuit that powers on is applied to the input power of power access end VIN during the foundation being raised to stationary value above freezing, closes the power tube of voltage regulator；Being characterized in that controlling effect need not detect output voltage VO UT, response time is extremely short, thus can be applicable to the process of extremely fast setting up of the power access end VIN of 10ns rank.
As shown in Figure 2 A, during enforcement, this device can include that Voltage Establishment rate control module 11, Voltage Establishment rate control module 11 connect described error amplifier 12.Voltage Establishment rate control module 11 controls output voltage VO UT of described voltage modulator circuit 14 after turning at described power tube 13 and rises to stationary value by set rate.This circuit works after the current control circuit that powers on, for reducing the transient current during loop work point is set up.
During enforcement, output voltage VO UT of voltage modulator circuit 14 is pressed set rate and is risen, and can be controlled the output voltage EA_OUT of described error amplifier 12 by Voltage Establishment rate control module 11, thus the mode changing the resistance of power tube 13 realizes.
In conjunction with Fig. 3 A, shown in 5, during enforcement, described Voltage Establishment rate control module 11 includes the tenth PMOS 111(M10) and the slow raised voltage source 112 that is connected on the tenth PMOS 111 grid, the voltage SS_CTRL that set rate rises is pressed in the output of described slow raised voltage source 112, the conducting resistance controlling described tenth PMOS 111 is risen in described set rate by geometric ratio, until the tenth PMOS 111 blocks.
When implementing, slow raised voltage source 112 can just start output voltage when power access end VIN have power supply input, it is also possible to 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, slowly raised voltage source 112 then can be additionally used in detection 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 slowly raised voltage source 112 output voltage after power tube 13 is opened, then slowly raised voltage source 112 then can be additionally used in detection power tube 13 on off state.
During enforcement, described error amplifier 12 includes the differential pair tube 121 being made up of two metal-oxide-semiconductors, two grids of differential pair tube 121 external a reference source VREF(reference voltage respectively) and voltage feedback signal VFB；The source electrode of described tenth PMOS 111 with drain the corresponding metal-oxide-semiconductor being connected to external a reference source VREF of differential pair tube 121 source electrode and drain on.
Described slow raised voltage source 112 includes 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 to defeated the second image current I2 corresponding to this bias current IB_SS of described 3rd electric capacity C3, another the most external ground wire VSS of the 3rd electric capacity C3；Described 3rd electric capacity C3 connects, with described second mirror image circuit 1121, the outfan that end is the described voltage source 112 risen by set rate.
Embodiment as shown in Figure 5, differential pair tube 121 is made up of the 11st PMOS M11 and the 12nd PMOS M12, and the source electrode of external a reference source VREF of grid, source electrode and the tenth PMOS 111 of the 11st PMOS M11 is connected, drain electrode is connected with the drain electrode of the 11st PMOS M11 the tenth PMOS 111；The breadth length ratio of described tenth PMOS 111 in described Voltage Establishment rate control module 11 is more than described 11st PMOS M11 and the breadth length ratio of the 12nd PMOS M12.Wherein, breadth length ratio difference is the biggest, and effect is the most obvious.
Concrete, as shown in Fig. 1,2B, 3B, two feedback resistances R1, R2 of concatenation it are additionally provided with between the outfan of described voltage modulator circuit 14, described feedback resistance, power tube 13 and error amplifier 12 constitute VR feedback adjustment loop, the described voltage feedback signal VFB i.e. negative feedback input signal of this VR adjustment loop (voltage feedback signal VFB is the R1 and the R2 dividing potential drop to VOUT).Its signal stream is: error amplifier 12 output voltage is to power tube 13 grid, change power tube 13 resistance, thus changing the output end voltage (two feedback resistance R1 and the voltage of R2 outer end) of voltage modulator circuit 14, the magnitude of voltage between two feedback resistance R1 and R2 inputs described error amplifier 12 as negative feedback input signal.
During enforcement, this soft starting device also includes that set rate arranges module, for the scheduled time according to described conducting power pipe 13, arranges size and the size of the 3rd electric capacity C3 of described second image current I2, thus changes the size of described set rate.
More specifically, in conjunction with Fig. 5, the operation principle of Voltage Establishment rate control module 11 is, output voltage is controlled by the voltage SS_CTRL utilizing a road to rise by set rate with a reference source VREF simultaneously.It is characterized in that both do not exist the handoff procedure of switching regulator.The voltage SS_CTRL risen by set rate in start-up course controls output voltage VO UT of voltage modulator circuit 14 and slowly sets up, and the negative feedback voltage VFB effect of this size difference and VR adjustment loop of relying primarily on the tenth PMOS the 111 and the 11st PMOS M11 realizes.
During enforcement, one Voltage Establishment rate control module 11 passes through the rate of climb of the comprehensive voltage SS_CTRL risen by set rate weighed when power tube 13 discharges suitable release time, also will be by the comprehensive release time (release time that the current control circuit that powers on determines) weighing power tube 13 and VR(voltage modulator circuit) load capacitance CL size set, to limit the surge current peak value of moment.
During enforcement, concrete, the breadth length ratio of described tenth PMOS 111 is more than described 11st PMOS M11 and the breadth length ratio of the 12nd PMOS M12, in start-up course, flowing through the tenth PMOS 111 electric current electric current much larger than the 11st PMOS M11, the tenth PMOS the 111 and the 12nd PMOS M12 constitutes substantial Differential Input to pipe；The current capacity of the tenth PMOS 111 is more than the 12nd PMOS M12, and system exists input imbalance Vos(due to negative feedback, and dividing potential drop VFB of output voltage VO UT is equal with SS_CTRL-Vos), start-up course has formula:
Vos is the system input offset voltage of error amplifier, when the tenth PMOS 111 breadth length ratio more than 12 PMOS M12 time, Vos be on the occasion of.
Concrete, the 3rd electric capacity C3 is charged by charging current (the second image current I2), and the voltage SS_CTRL risen by set rate rises, and output voltage VO UT equal proportion rises.Therefore, change the second image current I2 and the size of the 3rd electric capacity C3, output voltage VO UT can be realized and set up the accurate control of speed.
The voltage SS_CTRL risen along with set rate is further up, 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, by stable for output voltage VO UT in setting value.Error amplifier is switched to the time of normal operating conditions and is together decided on by the source voltage terminal of the second image current I2, the 3rd electric capacity C3 and the tenth PMOS 111, unrelated with the size of output voltage VO UT.The output voltage VO UT expression formula of steady statue:
During enforcement, in the domain of integrated circuit, differential pair tube the 11st PMOS M11, the 12nd PMOS M12 need to be dummy to ensure good coupling, and the tenth PMOS 111 then can utilize dummy pipe to realize, and reduces extra chip area consumption.
During enforcement, it is possible to use the top crown voltage (such as Fig. 4) of the second electric capacity C2 in the current control module that powers on 10 is as control signal, as second image current I2(such 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 to charge up.
During enforcement, can add a circuit, regulation powers on current control module 10 and the time of 11 two module works of Voltage Establishment rate control module.
With reference to aforementioned means, a kind of soft-start method, for voltage modulator circuit, described voltage modulator circuit 14 is provided with the power tube 13 for accessing power access end VIN and for regulating the error amplifier 12 of described power tube 13 conducting resistance, also include that the current control module 10 that powers on, the method step are: the current control module that powers on 10 detects power access end VIN；When the power supply described power access end VIN being detected inputs, the current control module that powers on 10 controls described power tube 13 and turns on (closed mode is changed into conducting state) after the scheduled time and access described power access end VIN.
During enforcement, by controlling to be converted to described plant-grid connection end signal switching signal, and exporting the mode of this signal intensity extremely described power tube 13 in the scheduled time, it is achieved described power tube 13 is changed into conducting state by closed mode.
During enforcement, the described scheduled time, by the electric capacity of constant-current charge, its voltage rises to the time of predetermined value and defines (seeing aforementioned computing formula).
The method, described voltage modulator circuit 14 may also include Voltage Establishment rate control module 11, in the method step: described Voltage Establishment rate control module 11 controls the output voltage EA_OUT of described error amplifier 12, thus makes output voltage VO UT of described voltage modulator circuit 14 rise to stationary value by set rate after described power tube 13 turns on.
During enforcement, described error amplifier 12 includes the differential pair tube 121 being made up of two metal-oxide-semiconductors, two grids of differential pair tube 121 external a reference source VREF and voltage feedback signal VFB respectively；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, i.e. arrange one that the accesses circuit voltage SS_CTRL risen by set rate；After power tube 13 turns on, voltage SS_CTRL described a reference source VREF of replacement that set rate rises should be pressed；After described output voltage VO UT rises to stationary value, described in cut-out, press the access of the voltage SS_CTRL that set rate rises, recover the voltage stabilizing reference role of a reference source VREF.
During enforcement, the access of the described voltage SS_CTRL by set rate rising realizes with cutting through a PMOS.
Concrete, should press in the voltage SS_CTRL uphill process that set rate rises, have magnitude of voltage more 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 process.
During enforcement, one Voltage Establishment rate control module 11 suitable release time the rate of climb by the comprehensive voltage SS_CTRL risen by set rate weighed when power tube 13 discharges, also will be by the comprehensive release time (release time that the current control circuit that powers on determines) weighing power tube 13 and VR(voltage modulator circuit) load capacitance CL size set.Ensure that the voltage SS_CTRL risen by set rate at least turns on the moment reference voltage less than a reference source VREF at power tube 13, to reduce power tube conducting electric current now.
During enforcement, the inventive method is referred to aforesaid device and expands.
The simulation waveform that powers on of the voltage regulator chip realized based on the present invention as shown in Figure 6, the VR based on the present invention signature waveform 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, effect due to feedback, the electric resistance partial pressure of output voltage VO UT i.e. (voltage feedback signal VFB) followed by the voltage SS_CTRL signal risen by set rate and rise, and is constantly present the difference of input imbalance VOS；Thus ensureing that output voltage VO UT is slowly set up under the control of the voltage SS_CTRL signal risen by set rate, current peak also controls for 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；It is applicable to have the linear model charge pump circuit of regulation power tube or non-loaded capacitance-voltage conversion circuit.
Apparatus of the present invention and method have the advantage that<1>, the present invention can eliminate voltage overshoot and surge current phenomenon simultaneously, it is achieved the mild foundation of output voltage, limit input current peak value.<2>, present invention is particularly suitable for the situation of voltage regulator (CaplessVR) without external load capacitance.<3>, the present invention is applicable to the start-up course under various power-up speeds, electrifying startup process the most extremely fast.<4>, present configuration simple, multiplexing VR(voltage modulator circuit as far as possible) component, adjustment loop does not increases impedance and capacitive reactance, maintains the response speed of VR.<5>, in the present invention, soft start-up process and reference voltage (a reference source VREF) to set up speed unrelated.<6>, the present invention be not required to output voltage VO UT detecting voltage modulator circuit 14 to realize soft start state and the switching of the state of adjustment of voltage regulator, soft starting circuit the time point set automatically with the disconnection of VR adjustment loop.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert the present invention be embodied as be confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, it is also possible to make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (13)
1. a soft starting device, it is characterized in that, including voltage modulator circuit (14), the current control module that powers on (10) and Voltage Establishment rate control module (11), described voltage modulator circuit (14) is provided with the power tube (13) connecting power access end and the error amplifier (12) being used for regulating described power tube (13) conducting resistance；The described current control module that powers on (10) is used for detecting whether power access end has external power source input, turns on controlling described power tube (13) when described power access end has external power source input after the scheduled time；Described Voltage Establishment rate control module (11) connects described error amplifier (12), for controlling the output voltage of described error amplifier (12), stationary value is risen to controlling the output voltage of described voltage modulator circuit (14) after described power tube (13) turns on by set rate, described Voltage Establishment rate control module (11) includes the tenth PMOS (111) and the slow raised voltage source (112) being connected on the tenth PMOS (111) grid, the voltage that set rate rises is pressed in the output of described slow raised voltage source (112), the conducting resistance geometric ratio controlling described tenth PMOS (111) rises in described set rate, until described tenth PMOS (111) blocks.
2. soft starting device as claimed in claim 1, it is characterised in that described power tube (13) is metal-oxide-semiconductor, described in the current control module (10) that powers on include switch element (102) and control unit (101)；Described switch element (102) is connected between the grid of described power access end and described power tube (13)；Described control unit (101) connects described power access end and described switch element (102), control the described switch element (102) described scheduled time on and off after described power access end has power supply input, the grid making described power tube (13) is turned on or off with described power access end, thus realizes the conducting of described power tube (13).
3. soft starting device as claimed in claim 2, it is characterised 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).
4. soft starting device as claimed in claim 3, it is characterised in that described control unit (101) includes the first mirror image circuit (1011), the first electric capacity, the second electric capacity and buffer (1012)；Described first electric capacity, one end of the second electric capacity all connect ground wire, and 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 outfan of described first mirror image circuit (1011)；Described first mirror image circuit (1011) external power supply incoming end and bias current export the first image current corresponding to this bias current to described second electric capacity；Described buffer (1012) is connected to described power access end and ground wire, and is transferred 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.
5. soft starting device as claimed in claim 4, it is characterised in that this soft starting device also includes that the scheduled time arranges module；Described buffer (1012) includes that the first phase inverter (10121) and the second phase inverter, described first phase inverter (10121) are connected with described second electric capacity, and it includes the 4th PMOS and the 5th NMOS tube；The described scheduled time arranges one or more in the cut-in voltage arranging 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 of module.
6. soft starting device as claimed in claim 1, it is characterized in that, described error amplifier (12) includes the differential pair tube (121) being made up of two metal-oxide-semiconductors, two grids of differential pair tube (121) external a reference source and voltage feedback signal respectively；The source electrode of described tenth PMOS (111) with drain the corresponding metal-oxide-semiconductor being connected to differential pair tube (121) external a reference source source electrode and drain electrode on.
7. soft starting device as claimed in claim 6, it is characterised in that described slow raised voltage source (112) includes the second mirror image circuit (1121) and the 3rd electric capacity；Described 3rd electric capacity and the outfan that connection end is described slow raised voltage source (112) of described second mirror image circuit (1121)；Described second mirror image circuit (1121) external power supply incoming end and bias current, and export the second image current corresponding to described bias current, another the most external ground wire of the 3rd electric capacity to described 3rd electric capacity.
8. soft starting device as claimed in claim 7, it is characterised in that described differential pair tube (121) is made up of the 11st PMOS and the 12nd PMOS；The external a reference source of grid of described 11st PMOS, the source electrode of source electrode and the tenth PMOS (111) is connected, and drain electrode 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 more than described 11st PMOS and the breadth length ratio of the 12nd PMOS.
9. soft starting device as claimed in claim 8, it is characterised in that be additionally provided with two feedback resistances of concatenation between the outfan 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.
10. soft starting device as claimed in claim 9, it is characterized in that, also include that set rate arranges module, for the scheduled time according to described power tube (13), size and the size of the 3rd electric capacity of described second image current are set, thus change the size of described set rate.
11. 1 kinds of soft-start methods, for voltage modulator circuit (14), described voltage modulator circuit (14) is provided with the power tube (13) for accessing power access end and is used for regulating the error amplifier (12) of described power tube (13) conducting resistance, it is characterized in that, also include power on current control module (10) and Voltage Establishment rate control module (11), described Voltage Establishment rate control module (11) includes the tenth PMOS (111) and the slow raised voltage source (112) being connected on the tenth PMOS (111) grid, the method step is:
The described current control module that powers on (10) detection 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) and turn on after the scheduled time；
The voltage that set rate rises is pressed in the output of described slow raised voltage source (112), and the conducting resistance geometric ratio controlling described tenth PMOS (111) rises in described set rate, until described tenth PMOS (111) blocks.
12. soft-start methods as claimed in claim 11, it is characterized in that, described voltage modulator circuit (14) also includes Voltage Establishment rate control module (11), the method further comprises the steps of: described Voltage Establishment rate control module (11) and controls the output voltage of described error amplifier (12), makes the output voltage of described voltage modulator circuit (14) rise to stationary value by set rate after described power tube (13) turns on；Described power tube (13) is changed into conducting state by closed mode, control to be converted to described plant-grid connection end signal switching signal by the described current control module that powers on (10), and after the scheduled time, control described power tube (13) conducting；The described scheduled time, is its voltage of electric capacity of constant-current charge time of rising to predetermined value.
13. soft-start methods as claimed in claim 12, it is characterized in that, described error amplifier (12) includes the differential pair tube (121) being made up of two metal-oxide-semiconductors, two grids of differential pair tube (121) external a reference source and voltage feedback signal respectively；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, i.e. arrange one that the accesses circuit voltage risen by set rate；After power tube (13) turns on, the voltage described a reference source of replacement that set rate rises should be pressed；After described output voltage rises to stationary value, described in cut-out, press the access of the voltage that set rate rises, recover the voltage stabilizing reference role of a reference source.
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| CN103795361B (en) * | 2014-02-27 | 2017-06-27 | 英特尔公司 | The method of amplifier installation and its soft start |
| CN104022641B (en) * | 2014-06-05 | 2016-09-07 | 辉芒微电子（深圳）有限公司 | Anti-cross punching and the fast charge pump circuit started and anti-cross punching start method soon |
| CN105446404B (en) | 2014-08-19 | 2017-08-08 | 无锡华润上华半导体有限公司 | Low differential voltage linear voltage stabilizer circuit, chip and electronic equipment |
| CN105490515B (en) * | 2016-01-11 | 2018-02-23 | 中国电子科技集团公司第十研究所 | Start-up circuit with nF level capacitive loads |
| CN108233909B (en) * | 2017-03-22 | 2023-08-18 | 杰夫微电子（四川）有限公司 | Semiconductor power supply protection device with controllable conversion rate |
| CN109217829B (en) * | 2018-07-26 | 2021-05-14 | 中国电子科技集团公司第二十九研究所 | Error amplifier rapid closed-loop system for field effect transistor |
| CN111309134B (en) * | 2020-03-23 | 2020-12-22 | 上海燧原智能科技有限公司 | Load current adjusting method and device, electronic equipment and storage medium |
| JP2022037436A (en) | 2020-08-25 | 2022-03-09 | ミツミ電機株式会社 | Semiconductor integrated circuit for regulators |
| CN113300586B (en) * | 2021-06-10 | 2022-04-01 | 深圳市微源半导体股份有限公司 | Power tube soft start circuit applied to power management chip |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866711A (en) * | 2005-04-21 | 2006-11-22 | 株式会社理光 | Constant-voltage circuit, semiconductor apparatus including constant-voltage circuit, and control method of constant-voltage circuit |
| EP1938454B1 (en) * | 2005-09-19 | 2012-03-07 | Texas Instruments Incorporated | Soft-start circuit and method for power-up of an amplifier circuit |
| CN102455728A (en) * | 2010-10-25 | 2012-05-16 | 三星半导体(中国)研究开发有限公司 | Current control circuit |
| CN103529891A (en) * | 2012-07-06 | 2014-01-22 | 国民技术股份有限公司 | Soft start device and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5082872B2 (en) * | 2008-01-17 | 2012-11-28 | ミツミ電機株式会社 | Soft start circuit |
-
2012
- 2012-07-06 CN CN201210233704.4A patent/CN103529890B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866711A (en) * | 2005-04-21 | 2006-11-22 | 株式会社理光 | Constant-voltage circuit, semiconductor apparatus including constant-voltage circuit, and control method of constant-voltage circuit |
| EP1938454B1 (en) * | 2005-09-19 | 2012-03-07 | Texas Instruments Incorporated | Soft-start circuit and method for power-up of an amplifier circuit |
| CN102455728A (en) * | 2010-10-25 | 2012-05-16 | 三星半导体(中国)研究开发有限公司 | Current control circuit |
| CN103529891A (en) * | 2012-07-06 | 2014-01-22 | 国民技术股份有限公司 | Soft start device and method |
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