CN101552544A - Power control device - Google Patents
Power control device Download PDFInfo
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- CN101552544A CN101552544A CNA2008100664558A CN200810066455A CN101552544A CN 101552544 A CN101552544 A CN 101552544A CN A2008100664558 A CNA2008100664558 A CN A2008100664558A CN 200810066455 A CN200810066455 A CN 200810066455A CN 101552544 A CN101552544 A CN 101552544A
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Abstract
The invention provides a power control device which comprises an upper controller and a lower controller, wherein the upper controller controls an upper switch MOS tube, the lower controller controls a lower switch MOS tube, and the upper controller and the lower controller are mutually separated and isolated in different planes. The power control device has the advantages of high reliability and reaction speed, simple circuit technology and low manufacturing cost, and can effectively limit various overshoot phenomena.
Description
Technical field
The invention belongs to power technique fields, relate in particular to a kind of power control.
Background technology
Resonance oscillation semi-bridge (be called for short LLC) power supply has the following advantages: high frequency, high efficiency, and switch MOS pipe, rectifier diode voltage stress are low, and rectification output does not need inductance, and cost is low, and radiation is low.
The LLC power supply becomes more and more popular in recent years, and use amount rises rapidly.But such power supply also has a lot of shortcomings, concrete manifestation is: the one, and reliability is low, the LLC power supply is to the designing requirement strictness, even if the most rational design, because the mode of operation of traditional controller itself can't limit power output and metal-oxide-semiconductor electric current, under some abnormal conditions, catastrophe failure very easily takes place, burst and burst as the switch MOS pipe together with driver, serious overload even short circuit appear as output loading, its operating frequency will reduce rapidly and metal-oxide-semiconductor enters the hard switching state, and switching tube was easy to burst even MOS conducting simultaneously phenomenon up and down occurred this moment; The 2nd, reaction speed is slow, as shown in Figure 1, the control of LLC power supply at present is to produce control signal by voltage controlled oscillator, controls the pipe up and down of half-bridge after level conversion and time-delay respectively, this control mode belongs to voltage mode control, reaction speed is slow, starts the metal-oxide-semiconductor current over pulse thereby cause easily, during the load dynamic change, the metal-oxide-semiconductor electric current also is easy to generate overshoot, and overshoot amplitude can not limit, if accelerate feedback control loop speed, promptly may cause vibration; The 3rd, technology difficulty height, cost height, level shifting circuit need adopt high pressure (600V) semiconductor device, technology difficulty and cost height; The 4th, high to the electric current allowance requirement of switch metal-oxide-semiconductor, because the mode of operation of controller itself can't limit power output and metal-oxide-semiconductor electric current, metal-oxide-semiconductor must leave big allowance in case damage because of electric current is excessive.
In order to improve reliability, the peripheral metal-oxide-semiconductor electric current that detects is generally adopted in the use of LLC power supply at present, increases protective circuit, quits work with the control controller.Though this way can play the certain protection effect, it has not only increased the complexity of peripheral circuit, and very slow to the reaction speed of fault.
Therefore, need a kind of new power control to solve the problems referred to above.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of power control, is intended to solve that existing LLC power control reliability is low, reaction speed is slow, technology difficulty is high, cost is high, opening firmly can appear in metal-oxide-semiconductor and the problem of metal-oxide-semiconductor conducting simultaneously up and down.
Embodiments of the invention are to realize like this, a kind of power control comprises controller and following controller, the described upward switch MOS pipe of controller control of going up, the control of described controller down is the switch MOS pipe down, and described upward controller and following controller are taked not the independent mutually and isolation of the mode on ground altogether.
The technical scheme that the present invention takes also comprises: power control also comprises driving amplifier and following driving amplifier, the described driving amplifier of going up is connected between controller and the last switch MOS pipe, and described driving amplifier down is connected down between controller and the following switch MOS pipe.
The technical scheme that the present invention takes also comprises: the described controller of going up includes comparator with following controller, and described controller down comprises: as oscillator with the comparator that produces square-wave signal, as the comparator of oscillator high level output permission control circuit and be used to detect and limit down the comparator of metal-oxide-semiconductor electric current.
The technical scheme that the present invention takes also comprises: the described controller of going up comprises oscillator, the described oscillator of going up comprises comparator U4-A, capacitor C 15, current source I1, current source I2, analog switch K1 and analog switch K2, current source I1 and analog switch K1 are connected in series between the supply power voltage VCC_H of capacitor C 15 and last controller, and current source I2 and analog switch K2 are connected in series in capacitor C 15 and last controller with reference between ground HB.
The technical scheme that the present invention takes also comprises: the described controller of going up also comprises the permission controller, described going up allows controller to comprise comparator U4-B, capacitor C 12, capacitor C 13, resistance R 12, resistance R 15, and half-bridge supply power voltage VB is device U4-B "-" end input as a comparison after capacitor C 12, capacitor C 13, resistance R 12, resistance R 15 dividing potential drops.
The technical scheme that the present invention takes also comprises: described controller down comprises oscillator down, described oscillator down comprises comparator U1-A, resistance R 5, capacitor C 2, resistance R 2, diode D1 and resistance R 32, the output of comparator U1-A is as the output of oscillator down, warp driving amplifier down amplifies metal-oxide-semiconductor under the rear drive, resistance R 2 and diode D1 series connection are between comparator U1-A "-" end and output, resistance R 5 is connected between VCC_L and comparator U1-A "-" end, capacitor C 2 is connected between comparator U1-A "-" end and the ground, resistance R 32 is connected between comparator U1-A output and the VCC_L pull-up resistor of device U1-A output as a comparison, and comparator U1-A "+" end is as the input of system feedback signal.
The technical scheme that the present invention takes also comprises: described controller down also comprises permission controller down, described permission controller down comprises comparator U1-B, capacitor C 9, capacitor C 10, resistance R 1 and resistance R 24, as "-" end input of U1-B, "+" of U1-B imports termination reference voltage VREF1 to half-bridge output HB voltage after capacitor C 9, capacitor C 10, resistance R 1, resistance R 24 dividing potential drops.
The technical scheme that the present invention takes also comprises: described controller down also comprises the current detecting controller, described current detecting controller comprises integrator U9-A, comparator U6-A and resistance R 4, resistance R 4 one end ground connection, the other end connects the input of integrator U9-A, and the output of integrator U9-A links to each other with comparator U6-A.
The technical scheme that the present invention takes also comprises: described controller down also comprises the startup trigger, described startup trigger is a monostable flipflop, the monostable flipflop output is connected down the input that the output of oscillator high level allows controller U1-B, and the input of monostable flipflop is triggered by the output signal of oscillator U1-A.
The technical scheme that the present invention takes also comprises: described controller down also comprises slow start-up control device circuit, described slow start-up control device circuit comprises current source, capacitor C 3, resistance R 9 and resistance R 7 down, described current source down comprises triode Q4, voltage-stabiliser tube ZD1 and resistance R 6, voltage-stabiliser tube ZD1 voltage stabilizing value is lower than VCC_L voltage, the pressure reduction of VCC_L and voltage-stabiliser tube ZD1 voltage stabilizing value is added to R6, and capacitor C 3 is parallel between the resistance R 6 and the triode Q4b utmost point.
The embodiments of the invention technical scheme has following advantage or beneficial effect: the power control of embodiments of the invention is under the condition that does not need any Additional Protection circuit, on working method, can guarantee to occur under the various situations, can limit the maximum current of metal-oxide-semiconductor or quit work in output loading; It can guarantee in any case, and metal-oxide-semiconductor can not occur opening firmly and metal-oxide-semiconductor conducting simultaneously phenomenon up and down; Owing to adopted the Cycle by Cycle control model, its reaction speed is fast, starts gently, and overshoot condition is greatly improved than prior art under the various conditions, and can limit the maximum overshoot amplitude; It is simple, with low cost to make integrated circuit technology, except a diode of the self-powered usefulness of high-pressure side need 500V withstand voltage, none high tension apparatus of entire controller, the cost of entire controller only approach the twice of the peripheral cell cost of existing controller; The reliability height, can limit the generation of various overshoot phenomenons, the current specification of switch MOS only need satisfy peak power output and require get final product, than existing technical scheme the reliability height is arranged, reaction speed is fast, circuit technology is simple, cost of manufacture is cheap, also limit the advantage of various overshoot phenomenons effectively.
Feature of the present invention and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
Description of drawings
Fig. 1 is the schematic block circuit diagram of existing LLC power-supply controller of electric;
Fig. 2 is the structure chart of the power control of the embodiment of the invention;
Fig. 3 is the circuit diagram of the power control of the embodiment of the invention;
Fig. 4 is the last controller in the power control of the embodiment of the invention and the circuit diagram of following controller.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also Fig. 2, structure chart for the power control of the embodiment of the invention, the power control of the embodiment of the invention comprises controller, following controller, goes up driving amplifier and following driving amplifier, upper and lower controller is the last switch MOS pipe Q1 and the following switch MOS pipe Q2 of control composition half-bridge after upper and lower driving amplifier drives respectively, last controller, following controller are taked not the independent mutually and isolation of the mode on ground altogether, last controller serves as with reference to ground with half-bridge output HB, and following controller is systematically to serve as reference ground.
See also Fig. 3, be the circuit diagram of the power control of the embodiment of the invention.The last controller of the power control of the embodiment of the invention amplifies metal-oxide-semiconductor Q1 in the rear drive through driving amplifier U5-A, and following controller amplifies switch MOS pipe Q2 under the rear drive through driving amplifier U3-A.Last controller adopts comparator to realize with following controller, adopts two comparators respectively.One of comparator in the following controller is used as oscillator (U1-A) and produces square-wave signal, another high level as oscillator is exported and is allowed control circuit (U1-B), also adopts a comparator (U6-A) to be used for the electric current of metal-oxide-semiconductor (Q2) under detection and the restriction in the described controller down.
See also Fig. 4, be the circuit diagram of last controller in the power control of the embodiment of the invention and following controller.The following controller of the power control of the embodiment of the invention comprises the oscillator of controller (being called for short oscillator down), following permission controller, current detecting controller, the gentle start-up control device circuit of startup trigger down, and last controller comprises oscillator and last permission controller.
In Fig. 4, U4-A, U4-B, U1-A, U1-B, U6-A are comparator; U5-A, U3-A are driving amplifier; U8 is an inverter; U7-A is a monostable flipflop; U9-A is an integrator; I1, I2 are current source; K1, K2 are analog switch.Wherein, comparator is triode opener electrode output, then exist between the comparator output that output links together " with " relation.
Following oscillator: following oscillator comprises comparator U1-A, R5, C2, R2, D1 and R32, the output of comparator U1-A is as the output of oscillator down, amplify metal-oxide-semiconductor Q2 under the rear drive through driving amplifier, R2 and D1 series connection are between U1-A "-" end and output, R5 is connected between VCC_L and U1-A "-" end, C2 is connected between U1-A "-" end and the ground, R32 is connected between U1-A output and the VCC_L pull-up resistor of device output as a comparison, and U1-A "+" end is as the input of system feedback signal (FB).When controller powers on, VCC_L begins to power up, and VCC_L charges to C2 by R5, and C2 voltage is begun to rise by 0V.Optocoupler U2 is in cut-off state before the system start-up, is higher than "-" input at U1-A "+" input level, and U1-A exports high level.When C2 voltage (being U1-A "-" voltage) rises to when being higher than U1-A "+" voltage, the U1-A output low level, this moment, C2 was by R2, D1 discharge.When C2 voltage discharges into when being lower than U1-A "+" voltage, U1-A exports high level, and D1 ends, and finishes the vibration of one-period.C2 voltage is begun to rise by the R5 charging by VCC_L again, enters next cycle of oscillation.
Following permission controller: following permission controller comprises comparator U1-B, C9, C10, R1 and R24.As "-" end input of U1-B, "+" of U1-B imports termination reference voltage VREF1 to half-bridge output HB voltage after C9, C10, R1, R24 dividing potential drop.When U1-A output high level, the Q2 conducting, half-bridge output (HB) is low level, and U1-B "-" terminal voltage is lower than U1-B "+" end (VREF1) voltage, and U1-B exports high-impedance state, allows U1-A output high level; When the U1-A output low level, Q2 ends, HB is a high level, U1-B "-" terminal voltage is higher than U1-B "+" end (VREF1) voltage, the U1-B output low level since the comparator of output-parallel be output as " with " relation, therefore forbid oscillator output high level down, keep Q2 and end, enter next cycle for low level up to the HB upset.
The current detecting controller: the current detecting controller comprises integrator U9-A, comparator U6-A and resistance R 4.Instantly switch MOS pipe Q2 conducting, the electric current that flows through resistance R 4 rises, (electric current is a non-linear current on the resistance R 4, for more performance, electric current needs to use behind integrator U9-A integration after resistance R 4 is converted to voltage) the resistance R 4 voltages voltage that outputs to comparator U6-A "-" end behind integration rises.When comparator U6-A "-" terminal voltage rises above comparator U6-A "+" terminal voltage (V resistance R EF3), comparator U6-A output low level, switch MOS pipe Q2 ends under forcing, and system is forced to finish first cycle in advance and enters second cycle.Start trigger: for the needs of performance, before being set in system start-up, the voltage that HB is ordered is about 1/2 of supply power voltage VB, and output allows the controller threshold voltage to be lower than 1/4 of supply power voltage VB, promptly has only just to allow down switch MOS pipe Q2 conducting when HB voltage is low.Therefore, if do not add processing, following controller can't be exported high level and start.Monostable flipflop U7-A has realized the function of system start-up.The stable state of trigger monostable flipflop U7-A is output as high-impedance state, and output low level before triggering forces to allow controller to be in high level output enable state.Instantly oscillator output high level, following switch MOS pipe Q2 conducting also triggers trigger monostable flipflop U7-A and enters stable state, and system begins to start.
Slow start-up control device circuit: slow start-up control device circuit comprises current source, C3, R9 and R7 down.Following current source comprises Q4, ZD1, R6.Voltage-stabiliser tube ZD1 voltage stabilizing value (being made as Vz) is lower than VCC_L voltage, the pressure reduction of VCC_L and Vz (being made as Vd) is added in R6, Q4eb utmost point PN junction (junction voltage calculates with 0.6V), the R9 series loop, because it is very little that R9 goes up electric current, ignore the R9 pressure drop, then the Q4c electrode current is Ic=(Vd-0.6)/R6, thereby obtains a fixing electric current.C3 and in R6 and Q4b interpolar.When VCC_L powers on, C3 by VCC_L, R9, ZD1, charge, the last voltage of C3 slowly rises to Vd from 0V, then the Ic electric current slowly rises to (Vd-0.6)/R6 from 0, because resistance R 3 is connected to the Q4c utmost point, following oscillator U1-A "+" terminal voltage begins slow rising from 0V, thereby realizes slow the startup.
Last oscillator: go up oscillator and comprise comparator U4-A, C15, I1, I2, K1, K2, U8, R8 and D2.Comparator U4-A "-" termination reference voltage (VREF4), "+" termination capacitor C15.Current source I1 and analog switch K1 are connected in series between the supply power voltage VCC_H of C15 and last controller.Current source I2 and analog switch K2 are connected in series in C15 and last controller with reference between ground HB.K1, K2 are by C13 voltage (is with reference to ground with HB) control, and high level K1 conducting, K2 end, and low level K1 ends, the K2 conducting.When Q2 ends, during the Q1 conducting, HB is a high level, and C13 is a low level, and K1 is by, K2 conducting, and capacitor C 15 is by current source I2 discharge.When C15 voltage reduces, when being lower than reference voltage VREF4 (comparator U4-A "+" end is lower than "-" end), the U4-A output low level, Q1 ends, the HB upset is low level, C13 voltage (being U4-B "-" terminal voltage) is higher than VREF4 voltage, and output low level is kept controller output low level (being that Q1 ends).K1 conducting this moment, K2 end, and capacitor C 15 is ended up to Q2 by current source I1 charging, and HB overturns to till the high level, enters following one-period.
Last permission controller: the permission controller of going up controller comprises comparator U4-B, capacitor C 12, capacitor C 13, resistance R 12, resistance R 15.Half-bridge supply power voltage VB is device U4-B "-" end input as a comparison after capacitor C 12, capacitor C 13, resistance R 12, resistance R 15 dividing potential drops, "+" input termination reference voltage V resistance R EF2 of comparator U4-B.
The operation principle of the following controller of the power control of the embodiment of the invention: when VCC_L begins to power up, before VCC_L is greater than Vz, Q4 forbids, voltage on the R3 (being comparator U1-A "+" input) is 0V, VCC_L charges to C2 by R5 simultaneously, C2 voltage is greater than 0V, the U1-A output low level, and C2 voltage is R2, R5 deduct the voltage of diode current flow pressure drop to VCC_L partial pressure value.VCC_L continues to power on, and when voltage during greater than Vz, ZD1 begins conducting, and slow start-up control device enters slow starting state.R3 voltage begins slow rising, and when R3 voltage during greater than C2 voltage, U1-A exports high level.Owing to started the trigger output low level in the time of last, then descend oscillator to be in the high level enable state.Therefore oscillator is exported high level down, and start the trigger triggering and enter the output high-impedance state, the Q2 conducting, the HB low level, following permission controller enters oscillator high level output enable state.Behind the following oscillator output high level, D1 ends, and C2 voltage rises, when C2 voltage during greater than R3 voltage, the U1-A output switching activity is a low level, and Q2 ends, following permission controller is forbidden oscillator output high level down, the D1 conducting, and C2 discharges by R2, D1 (from the pressure value near R3).C2 voltage is lower than R3 voltage very soon, but because high level output is under an embargo, and oscillator continues to keep low level output, C2 continues discharge.Following controller is waited for the upset of HB voltage, and when HB upset during for low-voltage, following permission controller enters oscillator high level output enable state once more, and following oscillator output high level is finished first work period to enter the next work period.Slow start-up control device output current strengthens gradually, R3 voltage raises gradually, and the oscillator output switching activity is that low level U1-A "-" terminal voltage (being C2 voltage) also raises with R3 voltage under impelling, and then the charging interval of C2 prolongs gradually, the ON time of Q2 also prolongs gradually, thereby realizes slow the startup.After the startup, transformer secondary output output OUT voltage rises, rise to set point after, the U2 passage is shunted by U2 from the electric current of current source output down, R3 voltage is stabilized in certain magnitude of voltage, the entire controller steady operation.
The operation principle of the last controller of the power control of the embodiment of the invention: when the Q2 conducting, when HB was low level, VCC_L charged to C14 (VCC_H) by D4.K1 conducting, K2 end simultaneously, and capacitor C 15 is by current source I1 charging (the C15 initial voltage value is that VREF4 deducts PN junction voltage), and U4-A "+" terminal voltage is higher than "-" terminal voltage.When Q2 ends, HB rises to high level, on allow controller to enter enable state, last controller output high level, Q1 conducting.While K1 ends, the K2 conducting, and capacitor C 15 is by current source I2 discharge.When C15 voltage is lower than VREF4, last oscillator output low level, Q1 ends, HB upset is low level, on allow controller to enter illegal state.K1 conducting, K2 end simultaneously, and capacitor C 15 is by current source I1 charging (this moment, the C15 initial voltage value was a VREF4 voltage), and U4-A "+" terminal voltage is higher than "-" terminal voltage.Last controller is waited for the upset of HB voltage, and when the upset of HB voltage was high level, last controller entered the next work period.Since second work period, the minimum voltage Vc15min of C15 equals VREF4 voltage.When HB was low level, C15 began charging from Vc15min, when being high level to the HB upset, and the last voltage of C15 the highest (being made as Vc15max); When HB was high level, the Q1 conducting began discharge from Vc15max.When C15 voltage was reduced to Vc15min, Q1 ended.Because the charging starting voltage of C15 is identical with the discharge end voltage, and charging current I1 is identical with discharging current I2, so the charging interval is identical with discharge time.Since C15 charging during the HB low level, HB high level during the C15 discharge, so the high level time of HB is identical with low level time, thus the duty ratio that has guaranteed half-bridge output HB is 50%.When the following controller of the power control of the embodiment of the invention is exported high level, the Q2 conducting, the HB low level, last controller is in high level output illegal state, has guaranteed that last metal-oxide-semiconductor Q1 ends when descending metal-oxide-semiconductor Q2 conducting.Instantly controller is because when down the control of oscillator self output was low level by the high level upset, Q2 ended, and the HB upset is high level, and following controller enters high level output illegal state, and last controller is removed illegal state, exports high level, the Q1 conducting.Be low level by last controller self control output by the high level upset again, Q1 ends, and the HB upset is low level, and last controller enters high level output illegal state.In sum, metal-oxide-semiconductor was open-minded under following controller must just can make when HB is low level, last controller must just can make metal-oxide-semiconductor open-minded when HB is high level, thereby has guaranteed that metal-oxide-semiconductor necessarily is operated in the no-voltage opening state, but also the phenomenon that metal-oxide-semiconductor is opened simultaneously about having stopped.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, a kind of power control, it is characterized in that: comprise controller and following controller, the described controller of going up is controlled upward switch MOS pipe, and the control of described controller down is the switch MOS pipe down, and described upward controller is taked not the independent mutually and isolation of the mode on ground altogether with following controller.
2, power control as claimed in claim 1, it is characterized in that: also comprise driving amplifier and following driving amplifier, the described driving amplifier of going up is connected between controller and the last switch MOS pipe, and described driving amplifier down is connected down between controller and the following switch MOS pipe.
3, power control as claimed in claim 1 or 2, it is characterized in that: the described controller of going up includes comparator with following controller, and described controller down comprises: as oscillator with the comparator that produces square-wave signal, as the comparator of oscillator high level output permission control circuit and be used to detect and limit down the comparator of metal-oxide-semiconductor electric current.
4, power control as claimed in claim 1, it is characterized in that: the described controller of going up comprises oscillator, the described oscillator of going up comprises comparator U4-A, capacitor C 15, current source I1, current source I2, analog switch K1 and analog switch K2, current source I1 and analog switch K1 are serially connected with between the supply power voltage VCC_H of capacitor C 15 and last controller, and current source I2 and analog switch K2 are serially connected with capacitor C 15 and last controller with reference between ground HB.
5, as claim 1 or 4 described power controls, it is characterized in that: the described controller of going up also comprises the permission controller, described going up allows controller to comprise comparator U4-B, capacitor C 12, capacitor C 13, resistance R 12, resistance R 15, and half-bridge supply power voltage VB is device U4-B "-" end input as a comparison after capacitor C 12, capacitor C 13, resistance R 12, resistance R 15 dividing potential drops.
6, power control as claimed in claim 1, it is characterized in that: described controller down comprises oscillator down, described oscillator down comprises comparator U1-A, resistance R 5, capacitor C 2, resistance R 2, diode D1 and resistance R 32, the output of comparator U1-A is as the output of oscillator down, warp driving amplifier down amplifies metal-oxide-semiconductor under the rear drive, resistance R 2 and diode D1 series connection are between comparator U1-A "-" end and output, resistance R 5 is connected between VCC_L and comparator U1-A "-" end, capacitor C 2 is connected between comparator U1-A "-" end and the ground, resistance R 32 is connected between comparator U1-A output and the VCC_L pull-up resistor of device U1-A output as a comparison, and comparator U1-A "+" end is as the input of system feedback signal.
7, as claim 1 or 6 described power controls, it is characterized in that: described controller down also comprises permission controller down, described permission controller down comprises comparator U1-B, capacitor C 9, capacitor C 10, resistance R 1 and resistance R 24, as "-" end input of U1-B, "+" of U1-B imports termination reference voltage VREF1 to half-bridge output HB voltage after capacitor C 9, capacitor C 10, resistance R 1, resistance R 24 dividing potential drops.
8, as claim 1 or 6 described power controls, it is characterized in that: described controller down also comprises the current detecting controller, described current detecting controller comprises integrator U9-A, comparator U6-A and resistance R 4, resistance R 4 one end ground connection, the other end connects the input of integrator U9-A, and the output of integrator U9-A links to each other with comparator U6-A.
9, as claim 1 or 6 described power controls, it is characterized in that: described controller down also comprises the startup trigger, described startup trigger is a monostable flipflop, the monostable flipflop output is connected down the input that the output of oscillator high level allows controller U1-B, and the input of monostable flipflop is triggered by the output signal of oscillator U1-A.
10, as claim 1 or 6 described power controls, it is characterized in that: described controller down also comprises slow start-up control device circuit, described slow start-up control device circuit comprises current source, capacitor C 3, resistance R 9 and resistance R 7 down, described current source down comprises triode Q4, voltage-stabiliser tube ZD1 and resistance R 6, voltage-stabiliser tube ZD1 voltage stabilizing value is lower than VCC_L voltage, the pressure reduction of VCC_L and voltage-stabiliser tube ZD1 voltage stabilizing value is added to R6, and capacitor C 3 is parallel between the resistance R 6 and the triode Q4b utmost point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100664558A CN101552544A (en) | 2008-04-02 | 2008-04-02 | Power control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100664558A CN101552544A (en) | 2008-04-02 | 2008-04-02 | Power control device |
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| Publication Number | Publication Date |
|---|---|
| CN101552544A true CN101552544A (en) | 2009-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100664558A Pending CN101552544A (en) | 2008-04-02 | 2008-04-02 | Power control device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001313A (en) * | 2011-09-08 | 2013-03-27 | 联正电子(深圳)有限公司 | Off-line uninterrupted power system |
| CN110247550A (en) * | 2018-03-09 | 2019-09-17 | 上海岭芯微电子有限公司 | A kind of booster type synchronization DC-DC circuit |
-
2008
- 2008-04-02 CN CNA2008100664558A patent/CN101552544A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001313A (en) * | 2011-09-08 | 2013-03-27 | 联正电子(深圳)有限公司 | Off-line uninterrupted power system |
| CN103001313B (en) * | 2011-09-08 | 2015-07-22 | 联正电子(深圳)有限公司 | Off-line uninterrupted power system |
| CN110247550A (en) * | 2018-03-09 | 2019-09-17 | 上海岭芯微电子有限公司 | A kind of booster type synchronization DC-DC circuit |
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Application publication date: 20091007 |