CN100367594C - DC to DC controller with inrush current protection - Google Patents
DC to DC controller with inrush current protection Download PDFInfo
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- CN100367594C CN100367594C CNB2004100366599A CN200410036659A CN100367594C CN 100367594 C CN100367594 C CN 100367594C CN B2004100366599 A CNB2004100366599 A CN B2004100366599A CN 200410036659 A CN200410036659 A CN 200410036659A CN 100367594 C CN100367594 C CN 100367594C
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Abstract
A DC to DC controller for controlling an inrush current from a DC to DC converter to a battery system having an internal isolating switch. The DC to DC controller is configured to control the DC to DC converter based on a state of the internal isolating switch. If the switch is open, the DC to DC controller adjusts the output voltage of the DC to DC converter to a predetermined voltage level. Based on the value of such voltage level, in rush current from the DC to DC converter to the battery system can be reduced or eliminated when the isolating switch changes from an open state to a closed state. An electronic device including such a DC to DC controller is provided. Related methods for controlling inrush current are also provided.
Description
Technical field
The present invention relates to the power management of electronic installation, relate to a kind of DC-DC controller that has surge current protection more specifically.
Background technology
Portable electron device (for example notebook computer, mobile phone, beep-pager, personal digital assistant etc.) is along with the continuous expansion of its performance and purposes, and is more and more general in current society.Many portable electron devices satisfy the portable characteristic of these devices by a rechargeable battery (for example battery of types such as lithium, nickel-cadmium or nickel-hydrogen) power supply.As long as conditions permit (for example an AC/DC adapter being inserted a standard AC socket), these portable electron devices can also be by a DC power supply.This DC power supply also can be powered under battery charging mode according to user, thereby rechargeable battery is charged.
Under battery charging mode according to user, various portable electron devices also can comprise a DC-DC converter, and this DC-DC converter receives the brute supply of DC power supply and constant voltage dc source is provided, thereby rechargeable battery is charged.DC-DC converter is controlled by a DC-DC controller.This DC-DC controller can receive the various input signals of various power supplies of expression and charge condition.The input of the input of for example, the input of an expression DC power supply electric current, an output of expression charging current and an output of another expression charging voltage.This DC-DC controller can also comprise and relevant various controls path or the loop of each input signal (for example an input supply current control path, an output charging current control path and an output charging voltage control path).Then, this DC-DC controller provides a control signal to DC-DC converter according in these control signals at least one, thus the output charge power supply level of control rechargeable battery.
Some rechargeable batteries have an internal switch,, disconnect this switch and will isolate electric power between monocell and other parts (for example DC-DC converter) in when charging at battery.This internal switch all can disconnect in all cases.For example, this switch is owing to self-calibrating disconnects, and like this, battery can be monitored the voltage level of its monocell, and does not have electric current to flow through.This switch also can disconnect owing to protection (for example, when the instantaneous power that is transferred to battery exceeds the maximum allowable power of battery).
But the disconnection of this switch and the closed problem that can cause surge current.For example, when this switch disconnects during at battery charging mode according to user, the DC-DC controller will detect charging current and drop to zero ampere.The DC-DC controller responds this detection case and increases the DC-DC output-voltage levels, reaches certain predetermined maximum level up to this level.Then, in case the internal switch of battery is closed once more, because the output voltage and the voltage difference between the cell voltage of DC-DC converter will produce a big surge current.This big surge current will cause rechargeable battery and related electronic device to break down or be aging.The amplitude of this surge current is mainly determined by the amplitude of this voltage difference.The duration of this surge current is determined by multiple factor, and these factors comprise Current Control path or the speed in loop and the capacitance of an output capacitance of DC-DC controller, enumerate one or two at this.
Therefore, need a kind of defective that can overcome above-mentioned prior art, and can control the DC-DC controller and the method for surge current.
Summary of the invention
One of a kind of control of the present invention has the battery system of an internal isolating switch from DC-DC converter to the DC-DC controller of surge current comprises: one first path, second path and a regulating circuit.This first path receives first input signal of the output power levels of an expression DC-DC converter, and one first control signal is provided.This second path receives this first input signal, if this internal isolating switch is in off-state, then provides one second control signal.This regulating circuit receives this first and second control signal, if regulating circuit is by this first control signal control, then regulate this output power levels to one first level, if regulating circuit is then regulated this power output parameter to one second level by this second control signal control.
In another embodiment of the present invention, provide a kind of electronic installation.This electronic installation comprises: a battery system, this battery system comprise a rechargeable battery and an internal insulation cell switch that links to each other with this rechargeable battery; A DC-DC converter, this DC-DC converter receive one from the input power levels of DC power supply and provide an output power levels to this battery system, thereby to this rechargeable battery charging; With a DC-DC controller, surge current of this DC-DC controller control from this DC-DC converter to this battery system.This DC-DC controller comprises: one first path, this first path receive first input signal of this output power levels of expression and one first control signal are provided; One second path, this second path receive this first input signal, are in off-state as if this internal insulation cell switch, and one second control signal then is provided; With a regulating circuit, this regulating circuit receives this first and second control signal, if regulating circuit is by this first control signal control, then regulate this output power levels to one first level, if regulating circuit is then regulated this output power levels to one second level by this second control signal control.
In another embodiment of the present invention, provide a kind of electronic installation.This electronic installation comprises: a battery system, this battery system comprise a rechargeable battery and an internal cell switch that links to each other with this rechargeable battery; A DC-DC converter, this DC-DC converter receive from one from the input power levels of DC power supply and provide an output power levels to this battery system, thereby to this rechargeable battery charging; With a DC-DC controller, this DC-DC controller is according to this DC-DC converter of State Control of this internal cell switch.
The method of the surge current of a kind of control has an internal cell isolating switch from DC-DC converter to battery system also is provided in another embodiment of the present invention.This method comprises: the state that detects this internal cell isolating switch; With if this internal cell switch be in off-state, then regulate output-voltage levels to a predetermined output voltage level of this DC-DC converter.
Description of drawings
Figure 1 shows that the block diagram of an exemplary electronic device of the present invention, this device comprises a DC-DC converter system that has a DC-DC controller;
Figure 2 shows that the block diagram of an embodiment of a DC-DC controller of the present invention, this controller is by the surge current of an internal isolating switch control flows to battery system;
Figure 3 shows that the block diagram of another embodiment of a DC-DC controller of the present invention, this controller is by the surge current of an internal isolating switch control flows to battery system; With
Figure 4 shows that the block diagram of another embodiment of a DC-DC controller of the present invention, this controller is by the surge current of an internal isolating switch control flows to battery system.
Embodiment
Figure 1 shows that the simplified block diagram of an electronic installation 104 and a DC power supply 102.Electronic installation 104 can be a kind of mancarried device, for example, and notebook computer, mobile phone, beeper, personal digital assistant etc.Usually, electronic installation 104 comprises a supply module 106, a battery system 116 and a circuit system 110.Usually, supply module 106 can comprise in all cases and monitors, controls and command various parts from each power supply (DC power supply 102, battery system 116) to the power of the system 110 of other power supply and electronic installation 104.A kind of parts of supply module 106 comprise DC-DC converter system 120, if exist a DC power supply 102 and a battery 118 with proper characteristics to need charging, then this DC-DC converter system 120 can provide a charging current to battery 118.
In order to charge the battery and/or to give electronic installation 104 power supplies, a DC power supply 102 is linked to each other with electronic installation 104.The AC/DC adapter of VD can be pressed and be converted into to DC power supply 102 for the standard electric alternating current of a receiver socket.DC power supply 102 can also be the DC/DC adapter that can insert the type socket, for example " igniter " type adapter.Power supply 102 separates with electronic installation 104 as shown in Figure 1, but it can be integrated in some devices.
Advantageously, as describing in detail at this, the on off state of the 120 responding to switch SW1 of DC-DC converter system so, disconnects under battery charging mode according to user as if switch SW 1, and then DC-DC converter will reduce its output voltage to one predetermined output voltage level.This predetermined output voltage is set in the preset range of a minimum cell voltage level, thereby obtains the maximum difference of the voltage level of an expectation.By controlling the difference of this voltage level, can control surge current.So, when switch SW 1 was closed once more, the surge current that flows into battery 118 can remain on an enough low level.In addition, also can be equal to or less than a minimum cell voltage and eliminate surge current by this predetermined output voltage level of regulating DC-DC converter 120.Provide the on-off controller 121 of control signal can also provide a control signal for switch SW 1 to DC-DC converter system 120.In addition, the DC-DC controller of DC-DC converter system 120 part can be equipped with the state that the on off state testing circuit comes sense switch SW1, with as described below.
Figure 2 shows that the block diagram more specifically of an embodiment of a DC-DC controller 222, these DC-DC controller 222 controls are offered the surge current of the battery 218 of battery system 216 by DC-DC converter 220.Under the charge mode, switch SW 4 closures provide one from DC-DC converter 220 to battery system 216 charging guiding path.Thereby other switch (not shown) also can closed make DC power supply power to system.In this embodiment, DC-DC controller 222 comprises an internal switch SW1 state of switch state detection circuit 230 that detects battery system 216.
DC-DC converter 220 can be a conventional DC-DC converter well known in the art.In an one exemplary embodiment, DC-DC converter can be a buck converter that comprises a high-end switch SW2, a low-end switch SW3 and a choke-condenser filter, and this choke-condenser filter comprises an inductance L 1 and a capacitor C 1.The state of a DC-DC controller 222 control high-end switch SW2 of the present invention and low-end switch SW3, so, these switches switch between the state of " switch closure " and " switch disconnection ".Under switch closed condition, switch SW 2 closures, and switch SW 3 disconnects.Under switch off state, switch SW 2 disconnects, and switch SW 3 closures.So, the output voltage of buck converter increases under switch closed condition, and reduces under switch off state.The switching of on off state is used for providing under various states a desired output charging voltage and electric current to the battery 218 (for example, when the switch SW 1 of battery system 216 disconnects) of battery system 216, will be described in further detail at this.
Usually, a DC-DC controller of the present invention 222 receives the various input signals of the various states of expression, and comprises associated control signal each internal control path to regulating circuit 226 is provided.At least one produces an output control signal from the control signal in various controls path regulating circuit 226 response, thus the high-end switch SW2 of control DC-DC converter 220 and the state of low-end switch SW3.Regulating circuit 226 can be various circuit well known in the art, that adopt the output control signal of any kind.In one embodiment, regulating circuit 226 can be a pulse-width modulation circuit, and this pulse-width modulation circuit provides a pulse-width modulation (PWM) control signal to give switch SW 2 and SW3.As known in the art, can be by work period control switch SW2 and " switch closure " state of SW3 and the duration of " switch disconnection " state that changes pulse-width modulation control signal.The output characteristic of the DC-DC converter 220 that so, just can obtain expecting.
For clarity, DC-DC controller 222 not shown all possible control paths.For example, supply current path that can receive from the input signal that detects resistance R 1, expression DC power supply electric current.Perhaps, one can receive one from detecting the charging current control path of input signal that resistance R 2, expression offer the charging current of battery system 216.Equally for clarity, these power supplies and charging current control path be not all shown in the DC-DC controller 222.
DC-DC controller 222 comprise one from 234 ends to regulating circuit 226 conventional voltage control path 232.Conventional voltage control path 232 receives the signal VFB of expression node 239 place's voltage levels.Conventional voltage control path 232 can comprise the voltage divider that a pair of resistance R 3 and R4 form, and this voltage divider will reduce VFB to voltage level signal VFB_10 lower with respect to V_DAC of voltage signal in proportion.Comparator 238 relatively the signal of a maximum output voltage level of this signal VFB_10 that reduces in proportion and one expression DC-DC converter 220 (for example, V_DAC), thereby the output control signal that this difference of expression is provided is to regulating circuit 226.
Advantageously, DC-DC controller 222 also can comprise a low-voltage control path 242.Control path 242 response cell switch state detection circuits 230, thus provide a control signal to come the state of control switch SW5.Cell switch state detection circuit 230 comprises one first comparator 252, one second comparator 254, one first edge detector 256, second edge detector 258 and a trigger 260.
During work, if the internal switch SW1 of battery system 216 disconnects under battery charging mode according to user, the charging current that then offers battery 218 drops to zero ampere.Conventional voltage control path 232 is the outputs of control DC-DC converters 220 usually, and drive this and export a maximum recharge voltage level V_DAC that allows to.Drive exporting this V_DAC level to and will causing a big positive voltage difference between DC-DC converter 220 and the battery system 216 of DC-DC converter 220.This big positive voltage difference will cause an excessive surge current when switch SW 1 closure.
Advantageously, on off state testing circuit 230 detects when switch SW 1 disconnects.Because when switch SW 1 disconnected, the voltage output of DC-DC converter 220 began to rise.When this voltage level reaches a predetermined level VMAX (wherein VMAX is less than V_DAC), high level signal of comparator 252 outputs.In case positive edge detector 256 detects this variation, just provides a pulse to come the output of set flip-flop 260.After being provided with, trigger 260 can produce an output control signal BATT_DCN and come Closing Switch SW5, thereby activates low-voltage control loop 242.In addition, the BATT_DCN control signal of trigger 260 disconnects the Closing Switch SW6 that links to each other with current source 268 usually.
Low-voltage control loop 242 then provides a control signal to regulating circuit 226, regulating circuit 226 then responds this control signal and the state of control switch SW2 and SW3, thereby the output voltage that drives DC-DC converter 220 drops to a predetermined voltage level.For example, when regulating circuit 226 is a pulse-width modulation circuit, can reduce the duty ratio of pulse-width signal.The compensation current that this predetermined voltage level can provide by resistance and/or the current source 270 of regulating cell R3 and R4 is provided with.This level value can be determined by accurate reference power source (internal trimmed reference).
On off state testing circuit 230 also can detect when switch SW 1 closure.Comparator 254 is signal and a predetermined minimum voltage level VMIN of the voltage (for example VFB_10) at an expression VFB place relatively.Should can be set to a value by predetermined minimum voltage level VMIN less than battery minimum charge (for example 0.1 volt).Therefore, when SW1 is closed, high level signal of comparator 254 outputs.Change in case positive edge detector 258 detects this, just provide a pulse to come the output of reset flip-flop 260.So, the output control signal of trigger 260 is promptly represented the internal cell switch SW 1 of a closure.Therefore, switch SW 5 disconnects, and low-voltage control path 242 is invalid.Therefore, DC-DC converter 220 is by other control path and circuit controls.
Charging control switch SW4 can for one independently switch or have one with switch SW 4 diode connected in parallel D1.Usually, switch SW 4 is by an on-off controller control (not shown).If charging current reaches the lower limit of a predetermined charging current level, then this on-off controller can cut-off switch SW4.So, in this case, any charging current diode D1 that will flow through.If charging current exceeds the lower limit of this predetermined charging current level, then on-off controller is with Closing Switch SW4.So, diode D1 does not consume any power.Therefore, diode D1 can prevent that electric current from flowing back to DC-DC converter 220 from battery system 216.When DC-DC converter 220 was a buck converter, this advantage can prevent that buck converter from working under a boost mode of not expecting.
Figure 3 shows that the block diagram of another embodiment of a DC-DC controller 322 of the present invention, this controller control is offered the surge current of the battery 318 of battery system 316 by DC-DC converter 320.Similarly the label of parts is similar to the label of similar parts among Fig. 2 among Fig. 3, therefore, for clarity, omits the description of any repetition at this.Usually, with comparing shown in the embodiment of Fig. 2, Fig. 3 revises on off state circuit 330 and low-voltage control loop 342.
On off state testing circuit 330 comprises comparator 352,354 and trigger 360.In the work, when switch SW 1 disconnected, the output voltage of DC-DC converter 320 began to rise up to reaching a predetermined level VMAX (wherein VMAX is less than V_DAC).When the output voltage of DC-DC converter 320 reaches VMAX, high level signal of comparator 352 outputs, then set flip-flop 360.Trigger 360 provides the cell switch status signal of this state of expression to switch SW 5 and SW6.Switch SW 5 closures activate low-voltage control loop 342.
The comparator 390 of low-voltage control loop 342 is first signal (VFB_10) and a secondary signal of representing a predetermined direct current/VD level of expression DC-DC converter 320 output voltages relatively.In this embodiment, the maximum output voltage level of DC-DC converter 320 through a reduction coefficient reduction after (for example 0.5) reduce, and equal this predetermined direct current/VD level.This reduction coefficient can be obtained by the whole bag of tricks known in the art, for example adopts various types of resistance 394,396 and 398 to constitute a voltage divider and obtains an expectation reduction coefficient.
So, when switch SW 1 closure, the output voltage of DC-DC converter 320 is adjusted to this predetermined output voltage level.Therefore, the surge current of battery 318 can be controlled by selecting this predetermined output voltage level.In addition, can provide and switch SW 4 diode connected in parallel D1.As above-mentioned detailed description, control switch SW4 can keep disconnecting and reaches a predetermined minimum levels up to charging current.Because charging current is substantially zero ampere when switch SW 1 disconnects, so in this embodiment, switch SW 4 also can disconnect.Therefore, because the pressure drop on the diode D1, the output voltage of DC-DC converter 320 is a bit larger tham the output voltage of diode D1.Therefore, the comparator 354 of test circuit for cell status 330 at first level of its inverting input (for example should compare one, 0.55XV DAC) and the voltage of the non-inverting input of comparator 390 (for example, 0.5XV DAC), wherein the former is a bit larger tham the latter, thereby solves the problem that diode D1 goes up pressure drop.
In case switch SW 1 closure, pin VFB will detect cell voltage, and comparator 354 will produce a positive pulse and come reset flip-flop 360.Therefore, switch SW 5 disconnects once more, and DC-DC converter 320 will be by other control path and circuit controls of DC-DC controller 232.Exceed predetermined charging current level (can by detect resistance R 2 and a comparator is judged) in case charging current increases to, switch SW 4 is closure, thereby charges by switch SW 4.Therefore, by correctly selecting the output-voltage levels of this predetermined direct current/direct current transducer, surge current can be controlled to an expectation level, even if is necessary then to eliminate fully.
Figure 4 shows that the block diagram of another embodiment of a DC-DC controller 422 of the present invention.In this embodiment, a cell switch state detection circuit 430 detects when switch SW 1 disconnects or be closed.Testing circuit 430 can be the testing circuit 230 or 330 of the foregoing description.Usually, comparator 490 provides a control signal to regulating circuit 426, thereby drives in output voltage to two voltage of DC-DC converter 420 one.Comparator 490 provides a control signal to drive this when switch SW 1 closure and exports V DAC to, export VMIN to and provide a control signal to drive this when switch SW 1 disconnects.
For example, in one embodiment, in a single day cell switch state detection circuit 430 detects switch SW 1 and disconnects, just send a control signal via path 429 to Port Multiplier 497 (MUX).Port Multiplier 497 then provides a signal VMIN non-oppisite phase end to comparator 490.Otherwise if switch SW 1 closure, MUX497 then provides another signal V_DAC non-oppisite phase end to comparator 490.
In addition, cell switch state detection circuit 430 provide a control signal via path 431 to voltage register 495.This signal writes this voltage register with a corresponding low digital signal.This corresponding low digital signal then is converted to an analog signal by digital/analog converter (DAC) 493, then offers the non-inverting input of comparator 490 by MUX497.
All switch SW 1, SW2, SW3, SW4, SW5 and SW6 among the various embodiment can be the transistor of arbitrary type known in the art, for example bipolar transistor (for example PNP and NPN) or field-effect transistor, for example MOSFET (for example PMOS and NMOS).
Though be described according to hardware at this, significant be that DC-DC controller of the present invention also can adopt software or hardware and software to combine and the signal processing technology known realizes.If adopt software to realize, then need a processor and machine-readable medium.Processor can provide the processor of required speed of the embodiment of the invention and function for any.For example, the processor of the Pentium family that this processor can be produced for a kind of Intel company (Intel Corporation), or the processor produced of a kind of Motorola (Motorola).But machine-readable medium comprises the medium of the instruction that any storage of processor is carried out.These medium can be read-only memory (ROM), random asccess memory (RAM), programmable read-only memory (prom), EPROM (Erasable Programmable Read Only Memory) (EPROM), EEPROM (Electrically Erasable Programmable Read Only Memo) (EEPROM), dynamic random access memory (DRAM), disk (for example floppy disk and hard disk drive), CD (for example CD-ROM), with other can storing digital information device, but be not limited to this.In one embodiment, instruction is stored in the media with a kind of compression and/or encryption format.
Embodiment described herein just adopts of the present invention wherein several, but is not limited to the present invention.Obviously, the embodiment that does not break away from the defined the spirit and scope of the present invention of claim that also exists other those skilled in the art to understand.
Claims (22)
- One kind control a surge current from DC-DC converter to the battery system that has an internal isolating switch the DC-DC controller, described DC-DC controller comprises:One first path, first input signal of an output power levels of a described DC-DC converter of expression of described first path reception also provides one first control signal;One second path, described second path receives described first input signal, if described internal isolating switch is in off-state, described second path provides one second control signal; WithA regulating circuit, described regulating circuit receives described first and second control signals, if described regulating circuit is controlled by described first control signal, then regulate described output power levels to one first level, if described regulating circuit is controlled by described second control signal, then regulate described power output parameter to one second level.
- 2. DC-DC controller according to claim 1, wherein said output power levels are an output-voltage levels, and described first level is that one first output-voltage levels and described second level are one second output-voltage levels.
- 3. DC-DC controller according to claim 2, wherein said battery system comprises a battery that a minimum cell voltage level is arranged, and wherein said second output-voltage levels is in the preset range of described minimum cell voltage level, thereby when described internal isolating switch when described off-state switches to closure state, prevent that described surge current from exceeding a predetermined acceptable surge current level.
- 4. DC-DC controller according to claim 2, wherein said battery system comprises a battery that a minimum cell voltage level is arranged, and wherein said second output-voltage levels is less than or equal to described minimum cell voltage level, thereby eliminates described surge current when described internal isolating switch when described off-state switches to closure state.
- 5. DC-DC controller according to claim 1, described DC-DC controller also comprises an on off state testing circuit, described on off state testing circuit detects the state of described internal isolating switch, and provides a described internal isolating switch state of switch state control signal of expression to described second path.
- 6. DC-DC controller according to claim 5, wherein said output power levels is an output-voltage levels of described DC-DC converter, and wherein said on off state testing circuit comprises one first comparator, and described first comparator is first comparison signal and second comparison signal of representing a predetermined maximal voltage level of described DC-DC converter of the described output-voltage levels of a described DC-DC converter of expression relatively; If described first comparison signal is greater than described second comparison signal, then described on off state testing circuit produces the described on off state control signal of the described off-state of the described internal isolating switch of expression.
- 7. DC-DC controller according to claim 1, wherein said output power levels is an output-voltage levels of described DC-DC converter, described second level is one second output-voltage levels, and wherein said second path also comprises a comparator, described comparator receives first comparison signal and second comparison signal of representing described second output-voltage levels of the described output-voltage levels of a described DC-DC converter of expression, thereby when described internal isolating switch is in described off-state, drive described output-voltage levels to described second voltage level.
- 8. DC-DC controller according to claim 1, wherein said regulating circuit comprise a pulse-width modulation circuit that a pulse-width modulation control signal is provided.
- 9. electronic installation, described electronic installation comprises:A battery system, described battery system comprise a rechargeable battery and an internal insulation cell switch that links to each other with described rechargeable battery;A DC-DC converter, described DC-DC converter receives the input power levels from a DC power supply, and provides an output power levels to described battery system, thereby to described rechargeable battery charging; WithA DC-DC controller, surge current of described DC-DC controller control from described DC-DC converter to described battery system, described DC-DC controller comprises:One first path, described first path receive first input signal of a described output power levels of expression, and one first control signal is provided;One second path, described second path receives described first input signal, if described internal insulation cell switch is in off-state, described second path provides one second control signal; WithA regulating circuit, described regulating circuit receives described first and second control signals, if described regulating circuit is controlled by described first control signal, then regulate described output power levels to one first level, if described regulating circuit is controlled by second control signal, then regulate described output power levels to one second level.
- 10. electronic installation according to claim 9, wherein said output power levels are an output-voltage levels, and described first level is that one first output-voltage levels and described second level are one second output-voltage levels.
- 11. electronic installation according to claim 10, wherein said rechargeable battery has a minimum cell voltage level, wherein said second output-voltage levels is in a preset range of described minimum cell voltage level, thereby when described internal insulation cell switch when described off-state switches to closure state, prevent that described surge current from exceeding a predetermined acceptable surge current level.
- 12. electronic installation according to claim 10, wherein said rechargeable battery has a minimum cell voltage level, wherein said second output-voltage levels is less than or equal to described minimum cell voltage level, thereby eliminates described surge current when described internal insulation cell switch when described off-state switches to closure state.
- 13. electronic installation according to claim 9, wherein said DC-DC controller also comprises an on off state testing circuit, described on off state testing circuit detects the state of described internal insulation cell switch, and provides a described internal insulation cell switch state of switch state control signal of expression to described second path.
- 14. electronic installation according to claim 13, wherein said output power levels is an output-voltage levels of described DC-DC controller, and wherein said on off state testing circuit comprises one first comparator, described first comparator is first comparison signal and predetermined maximal voltage level second comparison signal representing a described DC-DC converter of the described output-voltage levels of a described DC-DC controller of expression relatively, if described first comparison signal is greater than described second comparison signal, then described on off state testing circuit produces the described on off state control signal of the off-state of the described internal insulation cell switch of expression.
- 15. electronic installation according to claim 9, wherein said power output parameter is an output-voltage levels of described DC-DC converter, and described second level is one second output-voltage levels, and wherein said second path also comprises a comparator, described comparator receives first comparison signal and second comparison signal of representing described second output-voltage levels of the described output-voltage levels of a described DC-DC converter of expression, thereby when described internal insulation cell switch is in described off-state, drive described output-voltage levels to described second voltage level.
- 16. an electronic installation, described electronic installation comprises:A battery system, described battery system comprise a rechargeable battery and an internal cell switch that links to each other with described rechargeable battery;A DC-DC converter, described DC-DC converter receives the input power levels from a DC power supply, and provides an output power levels to described battery system, thereby to described rechargeable battery charging; WithA DC-DC controller, described DC-DC controller is according to the described DC-DC converter of the State Control of described internal cell switch.
- 17. electronic installation according to claim 16, wherein when described internal cell switch is in off-state, described DC-DC controller provides a switch to disconnect control signal to described DC-DC converter, wherein said DC-DC converter responds described switch and disconnects control signal, thereby produces a predetermined output voltage level in the output of described DC-DC converter.
- 18. electronic installation according to claim 16, wherein said predetermined output voltage level is in the preset range of the minimum voltage level of a described rechargeable battery, thereby when described internal cell switch when off-state switches to closure state, can control surge current from described DC-DC converter to described rechargeable battery.
- 19. electronic installation according to claim 16, wherein said predetermined output voltage level is equal to or less than the minimum voltage level of a described rechargeable battery, thereby when described internal cell switch when off-state switches to closure state, can eliminate surge current from described DC-DC converter to described rechargeable battery.
- 20. the method for the surge current of a control from DC-DC converter to the battery system that has an internal cell isolating switch, described method comprises:Detect the state of described internal cell isolating switch; WithWhen described internal cell isolating switch is in off-state, regulate an output-voltage levels to a predetermined output voltage level of described DC-DC converter.
- 21. method according to claim 20, wherein said predetermined output voltage level is in a minimum voltage level scope of the rechargeable battery of described battery system, thereby when described internal cell isolating switch when described off-state switches to closure state, can control surge current from described DC-DC converter to described rechargeable battery.
- 22. method according to claim 20, wherein said predetermined output voltage level is equal to or less than the minimum voltage level of the rechargeable battery of a described battery system, thereby when described internal cell isolating switch when described off-state switches to closure state, can eliminate surge current from described DC-DC converter to described rechargeable battery.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/431,815 US7203048B2 (en) | 2002-10-24 | 2003-05-08 | DC to DC controller with inrush current protection |
| US10/431,815 | 2003-05-08 |
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| Publication Number | Publication Date |
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| CN1551444A CN1551444A (en) | 2004-12-01 |
| CN100367594C true CN100367594C (en) | 2008-02-06 |
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| CNB2004100366599A Expired - Fee Related CN100367594C (en) | 2003-05-08 | 2004-04-29 | DC to DC controller with inrush current protection |
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|---|---|---|---|---|
| CN2741264Y (en) * | 2003-05-08 | 2005-11-16 | 美国凹凸微系有限公司 | DC/DC controller with surge current protection |
| KR101518162B1 (en) * | 2011-06-13 | 2015-05-06 | 미쓰비시덴키 가부시키가이샤 | Elevator control device |
| CN103023349B (en) * | 2011-09-26 | 2015-07-29 | 光宝电子(广州)有限公司 | Interchange turns direct current adaptive device and adaptive voltage output intent |
| JP6336209B2 (en) * | 2015-06-26 | 2018-06-06 | 三菱電機株式会社 | Air conditioner |
| US11056896B2 (en) | 2016-10-12 | 2021-07-06 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Terminal and device |
| MX2019010614A (en) | 2017-04-07 | 2019-10-15 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Wireless charging system, apparatus, method and device to be charged. |
| CN109787325B (en) | 2017-04-07 | 2023-06-27 | Oppo广东移动通信有限公司 | Wireless charging system, device and method and equipment to be charged |
| KR102318241B1 (en) * | 2017-04-13 | 2021-10-27 | 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 | Charging standby equipment and charging method |
| CN109782087B (en) * | 2018-12-28 | 2021-07-27 | Oppo（重庆）智能科技有限公司 | Test platform and test method of electronic device |
| CN109873561A (en) * | 2019-04-15 | 2019-06-11 | 苏州浪潮智能科技有限公司 | A kind of the energy utilization circuit and electronic equipment of overshoot voltage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5698964A (en) * | 1995-10-20 | 1997-12-16 | Dell Usa, L.P. | Adaptive power battery charging apparatus |
| US6184660B1 (en) * | 1998-03-26 | 2001-02-06 | Micro International, Ltd. | High-side current-sensing smart battery charger |
| CN2741264Y (en) * | 2003-05-08 | 2005-11-16 | 美国凹凸微系有限公司 | DC/DC controller with surge current protection |
-
2004
- 2004-04-29 CN CN 200420051116 patent/CN2741264Y/en not_active Expired - Lifetime
- 2004-04-29 CN CNB2004100366599A patent/CN100367594C/en not_active Expired - Fee Related
- 2004-05-06 TW TW93207071U patent/TWM261910U/en unknown
- 2004-05-06 TW TW93112786A patent/TWI247468B/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5698964A (en) * | 1995-10-20 | 1997-12-16 | Dell Usa, L.P. | Adaptive power battery charging apparatus |
| US6184660B1 (en) * | 1998-03-26 | 2001-02-06 | Micro International, Ltd. | High-side current-sensing smart battery charger |
| CN2741264Y (en) * | 2003-05-08 | 2005-11-16 | 美国凹凸微系有限公司 | DC/DC controller with surge current protection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN2741264Y (en) | 2005-11-16 |
| TWM261910U (en) | 2005-04-11 |
| TWI247468B (en) | 2006-01-11 |
| TW200507397A (en) | 2005-02-16 |
| CN1551444A (en) | 2004-12-01 |
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