CN102290978A - Power management system - Google Patents
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- CN102290978A CN102290978A CN2011102216308A CN201110221630A CN102290978A CN 102290978 A CN102290978 A CN 102290978A CN 2011102216308 A CN2011102216308 A CN 2011102216308A CN 201110221630 A CN201110221630 A CN 201110221630A CN 102290978 A CN102290978 A CN 102290978A
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Abstract
The invention provides a power management system, which comprises a plurality of power chips and a supplied chip with a plurality of power supply areas, wherein each power chip supplies power to a corresponding power supply area in the supplied chip by a pin; a plurality of programmable resistance voltage division circuits are arranged in the supplied chip; and each programmable resistance voltage division circuit acquires the power voltage of the corresponding power supply area in the supplied chip, generates a feedback voltage based on the power voltage and provides the feedback voltage for the power chip supplying the power to the corresponding power supply area by another pin. By such a design, the supplied chip can be supplied with the power only by developing and making researches on a standard power chip without repeatedly developing and making the researches on a power management chip for each supplied chip, so the research and development cost can be greatly saved.
Description
[technical field]
The present invention relates to electronic circuit field, but a kind of power-supply management system of flexible configuration particularly.
[background technology]
Along with the development of modern electronic technology, it is increasingly sophisticated that electronic system becomes, and power management scheme correspondingly is also increasingly sophisticated.At present increasing company all develops special-purpose Power Management Unit (PMU:PowerManagement Unit) chip.For smart mobile phone, panel computer, net book and the various notebook computer of complexity, its required PMU chip integrated nearly 7 road or more switching mode DC-to-DC converter and linear voltage regulator more than 20 tunnel nearly.The integrated function of these senior electronic products is also continuing increase, as GPS, 3-D image, acceleration transducer, gyroscope, projection and advanced video function, Modern wireless communication and intelligent sensing technology etc., every kind of required voltage and current of function all may be different, so all need independently power management module, so just cause the number of required switching mode DC-to-DC converter and linear voltage regulator also can increase.And because the modern electronic technology development speed is too fast, at the electronic product initial stage of development even all be difficult to predict and need how many road power management modules.At present, can design some redundant paths during many Power Management Unit chip designs, cause some path in use improper or unnecessary like this.And this analog chip design complexities of power management is very high; it is also very low once to design probability of successful; its construction cycle through regular meeting above 1 year; even reach 2 years also not within minority; required design team scale is also very big, as the above front-end circuit design team of 10 people, the rear end layout design team more than 5 people, a large amount of laboratory proofing personnel, volume production tester, technologist, encapsulation personnel and administrative staff etc.So need a kind of power management scheme of flexible configuration more, reduce to use the significant cost of overlapping development for each.
Another kind of conventional art is to build power-supply management system by a plurality of separate power source chips on printed circuit board (PCB) (PCB:PrintedCircuit Board), but this scheme is superseded by aforementioned PMU scheme gradually, and reason has two.
The first, traditional separate power source chip can't be accomplished multistage dynamic adjustments output voltage, and the dynamic adjustments output voltage is the essential function of high-efficiency power system of new generation.The application processor of one of core devices of contemporary electronic systems (Application Processor) chip is the control centre of electronic system, it can come the output voltage of dynamic adjustments power module according to the scene difference that the user uses, when needing the scene of high-speed cruising, it will be heightened the output voltage of power module, the operating frequency of chip can improve like this, and the power consumption of this moment is bigger.But when some need not the scene of high-speed cruising, it turned down the output voltage of power module, and the operating frequency of chip can reduce like this, thereby played energy-conservation effect.The output voltage of present separate power supplies chip generally is fixing the setting.And the PMU chip generally is the I by a standard
2C interface connects application processor and PMU chip, specifically can be referring to shown in Figure 1, and wherein said I
2C interface has two holding wires (SDA and SCK), and all power modules (specifically including 6 DC-to-DC converter, i.e. DCDC1, DCDC2, DCDC3, DCDC4, DCDC5 and DCDC6) are shared an I
2C interface.I
2C interface is followed I
2The C agreement is to realize communicating by letter of described application processor and PMU chip chamber.Described application processor can be notified the PMU chip to heighten or reduce output voltage, also can realize enabling control, promptly can notify it to close when certain road power module is worked, so that power saving; When needing its work, notify its unlatching work.Similarly, at described second kind of conventional art, can be by the separate power supplies chip be increased an I
2C interface, each separate power supplies chip need increase by two I like this
2The pin of C, and application processor all need increase by two I for each separate power supplies chip
2The pin of C.Pin is many more, and chip cost is high more, and this cost all too is big, does not almost have producer to adopt this scheme at present.
The second, the resolution element solution lacks electrifying timing sequence management flexibly.The PMU scheme can provide the electrifying timing sequence of flexible configuration, and promptly the sequencing of each road power initiation and relative delay are set.
In addition, constantly increase owing to the PMU chip-scale among Fig. 1, even satisfy certain power path on one side from the application processor chip to be powered part closer, as DCDC1 and DCDC2, but always occur as DCDC4 and DCDC5 apart from being powered the far situation of circuit.Rpar4 and Rpar5 are on the printed circuit board (PCB) because the long bigger dead resistance that causes of cabling when supply current is very big, also can produce very big energy loss on this dead resistance, and its loss power is I
2R, wherein I is a supply current, R is the dead resistance on the printed circuit board (PCB).These energy losses all directly change into heat.
In addition, in the conventional P MU solution, pass through I
2C circuit and the communication of PMU chip are subjected to I on the one hand
2C circuit clock frequency limitation, the speed of its transmission data can be limited in lower speed.In order to save the chip pin number, the PMU chip is generally only by an I in addition
2C interface transmits the control data of all power channel of control, the further like this speed that has reduced the control of power channel.
Therefore being necessary to propose a kind of new technical scheme solves the problems referred to above.
[summary of the invention]
The purpose of this part is to summarize some aspects of embodiments of the invention and briefly introduces some preferred embodiments.In this part and the application's specification digest and denomination of invention, may do a little simplification or omit avoiding the making purpose of this part, specification digest and denomination of invention fuzzy, and this simplification or omit and can not be used to limit the scope of the invention.
The object of the present invention is to provide a kind of power-supply management system, the power supply chip that it needs the research and development standard just can be and is powered chip power supply, need not to repeat to research and develop power management chip for each money is powered chip, can greatly save R﹠D costs.
According to purpose of the present invention, the invention provides a kind of power-supply management system, the chip that is powered that it comprises several power supply chips and has several service areas, wherein each power supply chip provides power supply by a pin for a described service area that is powered in the chip, the described chip internal that is powered is provided with several programmable resistance bleeder circuits, each programmable resistance bleeder circuit is gathered the described supply voltage that is powered a service area in the chip, and generate a feedback voltage based on this supply voltage, by another pin described feedback voltage is offered power supply chip into its corresponding service area power supply.
Further, described power supply chip is DC-to-DC converter chip or linear voltage regulator chip.
Further, described DC-to-DC chip comprises four pins, and described four pins are respectively: the input power pin, pin, feedback signal pin and switch output pin; Described linear voltage regulator comprises four pins, and described four pins are respectively: the input power pin, pin, feedback signal pin and voltage output pin.
Further, described programmable resistance bleeder circuit comprises supply voltage and several resistance between the ground and several switches in parallel with each resistance respectively that are series at corresponding service area, the control end of each switch is controlled by the described control signal that is powered chip, an intermediate node of several resistance of series connection is as feedback node, and the voltage on the described feedback node is used as described feedback voltage.
Further, between the supply voltage of corresponding service area and feedback node, be provided with several resistance, between described feedback signal output node and ground, be provided with several resistance.
Further, described programmable resistance bleeder circuit also comprises an enable switch, and a link of described enable switch connects predetermined voltage, and another link connects described feedback node, and the control end of described enable switch connects an enable signal.
Further, described power supply chip comprises a comparator and control circuit, an input of described comparator receives described feedback voltage, another input connects a reference voltage, its output output is used to control the enable signal that described control circuit enables, described control circuit receives described feedback voltage, and provides power supply for the service area of correspondence.
Further, described reference voltage is arranged between the supply voltage of the normal working voltage of feedback voltage and corresponding service area, and described predetermined voltage is the supply voltage of corresponding service area.
Further, the voltage sample point in the described divider resistance circuit able to programme is arranged on the supply voltage extreme lower position of the corresponding service area that is powered in the chip.
Compared with prior art, power-supply management system provided by the invention only need be researched and developed the power supply chip of sign, just can be implemented as and be powered chip power supply, and need not to repeat to study the Switching Power Supply managing chip for each money is powered chip, greatly save R﹠D costs, and its inner programmable resistance bleeder circuit can be realized the dynamic electric voltage regulatory function, in addition, because power supply chip and when being powered chip and being connected employing connect up nearby, thereby reduce the wiring area of printed circuit board (PCB), make electronic system miniaturization more.
[description of drawings]
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.Wherein:
Fig. 1 is the structural representation of power management in the prior art;
Fig. 2 is power-supply management system structural representation in one embodiment among the present invention;
Fig. 3 is the schematic diagram of power-supply management system in a specific embodiment among the present invention;
Fig. 4 is the schematic diagram of power-supply management system in another specific embodiment among the present invention;
Fig. 5 is the schematic diagram of programmable resistance bleeder circuit among the present invention;
Fig. 6 is DCDC chip circuit diagram in one embodiment among the present invention;
Fig. 7 is LDO chip circuit diagram in one embodiment among the present invention; With
Fig. 8 is application processor schematic diagram in one embodiment among the present invention.
[embodiment]
Detailed description of the present invention is mainly come the running of direct or indirect simulation technical solution of the present invention by program, step, logical block, process or other symbolistic descriptions.Be the thorough the present invention that understands, in ensuing description, stated a lot of specific detail.And when not having these specific detail, the present invention then may still can realize.Affiliated those of skill in the art use these descriptions herein and state that the others skilled in the art in affiliated field effectively introduce their work essence.In other words, be the purpose of the present invention of avoiding confusion, because the understanding easily of method of knowing and program, so they are not described in detail.
Alleged herein " embodiment " or " embodiment " are meant special characteristic, structure or the characteristic that can be contained at least one implementation of the present invention.Different in this manual local " in one embodiment " that occur not are all to refer to same embodiment, neither be independent or optionally mutually exclusive with other embodiment embodiment.In addition, represent the sequence of modules in method, flow chart or the functional block diagram of one or more embodiment and revocablely refer to any particular order, also be not construed as limiting the invention." some " described in the literary composition and " several " all refer to two or more.
Fig. 2 is power-supply management system 200 structural representation in one embodiment among the present invention, described power-supply management system 200 comprises and is powered chip 210 and several power supply chips 220, wherein each power supply chip 220 is powered for described that a service area provides power supply in the chip 210 by a pin, described chip 210 inside that are powered are provided with several programmable resistance bleeder circuits (below will consult Fig. 4 do specifically tell about), described programmable resistance bleeder circuit is gathered the described supply voltage that is powered a service area in the chip 210, and generate a feedback voltage based on this supply voltage, described feedback voltage is offered the power supply chip of its corresponding service area power supply by another pin.Only show four power supply chips 220 among the figure, but in actual applications, the number of described power supply chip 220 can be set according to the described demand that is powered chip 210.Describe power-supply management system among the present invention in detail below in conjunction with Fig. 3 to Fig. 6.
Fig. 3 is the schematic diagram of power-supply management system in a specific embodiment among the present invention, and compared to Figure 1, each power supply chip 220 in the power-supply management system among Fig. 3 is independently, and promptly each power supply chip 220 is connected with the described chip 210 that is powered respectively.Being powered chip 210 and can being the application processor described in Fig. 1 here, and power supply chip 220 can be DC-to-DC converter (6 DC-to-DC converter have been shown among Fig. 3, wherein have been specially DCDC1, DCDC2, DCDC3, DCDC4, DCDC5 and DCDC6).Wherein each DC-to-DC converter all has four pins, described four pins be specially input power pin V, pin G, feedback signal pin FB and switch output pin LX.The feedback signal pin FB of each power supply chip 220 (being the DC-to-DC converter among this figure) connects with the described corresponding programmable resistance bleeder circuit that is powered in the chip 210, described switch output pin LX and corresponding service area's connection.The pin LX that is each power supply chip 220 provides power supply for a described service area that is powered in the chip 210, corresponding programmable resistance bleeder circuit is gathered the supply voltage of described service area, and generate a feedback voltage based on this supply voltage, by telescopic pin FB described feedback voltage is offered power supply chip into its corresponding service area power supply.
Fig. 4 is the schematic diagram of power-supply management system in another specific embodiment among the present invention, power supply chip 220 in the present embodiment (there is shown 6 linear voltage regulators for linear voltage regulator, wherein be specially LDO1, LDO2, LDO3, LDO4, LDO5 and LDO6), wherein said linear voltage regulator can be set to the chip of four pins of standard, described four pins comprise input power pin V, pin G, feedback signal pin FB and voltage output pin VO.The feedback signal pin FB of each power supply chip 220 (being the linear voltage regulator among this figure) is connected with corresponding service area with the described respectively resistor voltage divider circuit that is powered the correspondence in the chip 210 of voltage output pin VO.
Certainly, when specific implementation, described power supply chip is not limited to DC-to-DC converter shown in Fig. 3 and Fig. 4 and linear voltage regulator, can also be the power supply chip of other types, as long as the pin of each power supply chip is connected just passable with the corresponding node that is powered the chip internal setting.In addition, for each power-supply management system, the power supply chip that is connected also not necessarily all is that (as all power supply chips among Fig. 3 all is DC-to-DC converter to same type, and all power supply chips among Fig. 4 all are linear voltage regulators), in actual applications, the power supply chip that is connected also can be different types, can can be linear voltage regulator for DC-to-DC converter, another part power supply chip as the part power supply chip, a part can also be other power supply chips after by standard configuration again.
Fig. 5 is the schematic diagram of programmable resistance bleeder circuit among the present invention, wherein said programmable resistance bleeder circuit comprises supply voltage VDD and several resistance between the ground and several switches in parallel with each resistance respectively that are series at corresponding service area, the control end of each switch is controlled by the described control signal that is powered chip, an intermediate node of several resistance of series connection is as feedback node, and the voltage on the described feedback node FB is used as described feedback voltage.Being provided with several between described supply voltage VDD and the feedback node FB can be by described several resistance (being respectively resistance R 1, resistance R 2, resistance R 3 and resistance R 4) that are powered internal chip enable signal (signal shown in the figure is DA1, DA2 and DA3) control; Several can be by described several resistance (being respectively resistance R 5, resistance R 6, resistance R 7 and resistance R 8) that are powered internal chip enable signal (signal shown in the figure is DA4, DA5 and DA6) control to be provided with other between described feedback node FB and the ground.Wherein signal DA1 is by K switch 1 controlling resistance R2, signal DA2 is by K switch 2 controlling resistance R3, and signal DA3 is by K switch 3 controlling resistance R4, and signal DA4 is by K switch 4 controlling resistance R5, signal DA5 is by K switch 5 controlling resistance R6, and signal DA6 is by K switch 6 controlling resistance R7.Like this along with the high-low level difference of internal signal, the resistance R between supply voltage VDD and the feedback node FB
UP, the resistance R between feedback node FB and the ground
DNCan dynamic adjustments, thus can realize the effect of dynamic adjustments output voltage.
When described programmable resistance bleeder circuit specifically connects in Fig. 3, its described supply voltage VDD connects with the pin LX of corresponding DC-to-DC converter, as first via programmable resistance bleeder circuit (including supply voltage VDD1 and feedback signal output node FB1) corresponding to the first DC-to-DC converter DCDC1, its corresponding supply voltage VDD1 is connected with the pin LX of DCDC1, and described feedback node FB1 is connected with the pin FB of DCDC1.When described programmable resistance bleeder circuit specifically connects in Fig. 4, its described supply voltage VDD connects with the pin VO of corresponding linear regulator, as first via programmable resistance bleeder circuit (including supply voltage VDD1 and feedback node FB1) corresponding to linear regulator LDO1, its corresponding supply voltage VDD1 is connected with the pin VO of LDO1, and described feedback node FB1 is connected with the pin FB of LDO1.Remaining each power supply chip all carries out just no longer having described in detail here with similarly connecting with corresponding programmable resistance bleeder circuit.
As shown in Figure 5, the voltage of the power supply output node VDD1 of described first via power supply chip equals:
So the DA1-DA6 signal that is powered chip internal is by switch controlling resistance R
UPAnd R
DN, can further realize voltage control, and then avoid being powered in the prior art I that needs simultaneously in chip and the PMU chip power supply output node VDD1
2The C circuit, and can realize the dynamic electric voltage regulatory function.
Certainly, the resistance among Fig. 5 is not limited to above-mentioned several resistance, can also have more or less resistance to realize dynamic adjustments.Obviously, described several resistance can also adopt parallel connection or mix ways of connecting except the mode that is connected in series shown in the figure.Can realize dynamic adjustments better by multiple connected mode to voltage.
In addition, divider resistance circuit able to programme among Fig. 5 has also designed and has enabled control, promptly comprise enable switch Kon, the link of described enable switch Kon connects predetermined voltage V_IO, another link connects described feedback node FB, and the control end of described enable switch Kon connects an enable signal ENB.Wherein when enabling control signal ENB when being high level, described enable switch Kon conducting is pulled to V_IO voltage with the voltage FB of described feedback node, and the V_IO voltage here can be for being powered the supply voltage of corresponding service area in the chip.
Common I
2The clock frequency of C is generally hundreds of KHz, can work above 1GHz and be powered chip (as application processor), and to be built in the programming that is powered the divider resistance circuit able to programme in the chip 210 is real-time, limits without any communication delay.Have faster dynamic voltage adjustment speed than existing P MU solution and enable/closing velocity so the present invention quotes divider resistance circuit design scheme able to programme, promptly application processor is faster to the control rate of power path.
Fig. 6 is DCDC chip circuit diagram in one embodiment among the present invention, and described DCDC chip comprises DCDC controller circuitry and comparator C omp1, and VTH is a reference voltage, can be produced by the reference voltage source circuit in the DCDC controller.The DCDC chip is here integrated standardization to form the DC-to-DC chip with above-mentioned four pins with DCDC control circuit and comparator C omp1.When the voltage of feedback signal FB was higher than VTH, comparator C omp1 output EN signal was a low level, and control DCDC control circuit cuts out, and forbids the work of DCDC controller.When the voltage of feedback signal FB was lower than VTH, comparator C omp1 output EN signal was a high level, allows the work of DCDC control circuit.Usually, described reference voltage VHT is set to the magnitude of voltage between FB normal working voltage and the V_IO voltage, FB was adjusted stable target voltage values when wherein the FB normal working voltage was meant DCDC controller operate as normal, and V_IO voltage is the supply voltage that is powered the logical circuit of often opening in the chip.In one embodiment, be 0.6V as the normal working voltage of FB, and V_IO voltage is 2.8V, then VTH can be set to 2V.
In actual applications, described DCDC control circuit is the size of a comparison FB voltage and an internal reference voltage, and when FB voltage was lower than internal reference voltage, conversion adjustment increased the duty ratio of LX signal; When FB voltage was higher than internal reference voltage, conversion adjustment reduced the duty ratio of LX signal.With voltage-dropping type DCDC is example, produce VDD1 voltage after LX signal process inductance and electric capacity (as L11 among Fig. 3 and the C11) filtering, promptly be powered in the chip by the programmable resistance bleeder circuit at application processor and produce the FB signal, feed back to again in the DCDC change-over circuit, formed degeneration factor like this.FB voltage accurately can be adjusted to internal reference voltage during such degeneration factor operate as normal, such as when described internal reference voltage is 0.6V, the FB normal working voltage is 0.6V.This voltage can need be worked by on the pcb board or be integrated in the voltage regulator independently often opened in the application processor or the power supply of DCDC change-over circuit always, can not be turned off.
By Fig. 5 and Fig. 6 as can be known, by being powered the control of chip internal control signal to feedback signal FB voltage, and the comparison of the voltage of feedback signal FB and reference voltage VTH can further realize enabling and turn-offing the DCDC control circuit.
Fig. 7 is LDO chip circuit diagram in one embodiment among the present invention, and its operation principle with the DCDC control circuit shown in Fig. 6 is identical substantially, and just application circuit is different with controller architecture, so just no longer describe in detail here.
In addition, the implementation among Fig. 6 and Fig. 7 can also increase in DCDC control circuit and LDO control circuit the delay of EN signal is avoided too responsive to system noise.Promptly when the EN signal when low level becomes high level, within certain hour, keep high level, and interim step-down level can not occur the time, DCDC control circuit and LDO control circuit start just and work.Equally, when the EN signal when high level becomes low level, within certain hour, keep low level, and can not occur uprising level the time, DCDC control circuit and LDO control circuit are closed just and are quit work temporarily.
Above-mentioned programmable resistance bleeder circuit is arranged in and is powered chip (as application processor), in more excellent embodiment, and can be with described divider resistance sampled point choose reasonable able to programme at the described power supply minimum point place that is powered on the chip.As shown in Figure 8, application processor schematic diagram in one embodiment during it shows.Voltage VDD1 is input to from the application processor upper left corner and is powered chip, generally the pressure welding point of described chip and chip pin is coupled together R by gold thread
GoldBe the impedance of gold thread in the encapsulation of equivalence, comprise dead resistance and inductance.With the dead resistance is example, and the gold thread resistance of 50mohm when the electricity consumption modules A RM of application processor consumes 1 Ampere currents, will form the 50mV voltage drop on dead resistance.Because these electric currents also may be dynamic, so stray inductance can cause on it voltage drop bigger.Very big owing to being powered the shared chip area of modules A RM in addition, supply terminals is in the upper left corner, because the dead resistance of metal line causes the voltage actual specific upper left corner in the lower right corner much lower, this phenomenon is called as IR drop effect in chip design.Modern senior simulation software can be modeled to this effect more clearly, but chip operation scene difference, the power consumption electric current is also different, and this voltage drop changes thereupon.After the chip manufacturing, chip chamber also there are differences in addition, and this resistance value is also different, and the voltage drop that equals electric current and resistance product is also different.Simultaneously, resistance and electric current also change with environmental factors such as temperature.When voltage is too low, will cause digital circuit to work, as the deadlock phenomenon.In order to prevent the phenomenon that crashes, can suitably improve the voltage at node VDD1 place usually, can avoid the brownout of minimum voltage point like this, owing to there is above-mentioned uncertainty, generally leave big surplus.A kind of method that the present invention adopts is to be connected by the upper end with described divider resistance R1 able to programme on the minimum voltage point, so the feedback voltage that samples is based on the dividing potential drop of minimum voltage point, so can accurately control the voltage of minimum point, make minimum voltage point also have sufficiently high voltage to guarantee that entire circuit can not crash.
In the present invention,, can adopt, can be distributed in very easily and be powered near the circuit as sot23-5 or littler packing forms because the power supply chip of each standard is all very little.Guarantee that like this cabling on the printed circuit board (PCB) is shorter, dead resistance is less, makes thermal losses less, thereby helps to improve the operating efficiency of system, for battery power supply system, can prolong and once is full of the operating time behind the electric weight.In addition,, can reduce length of arrangement wire greatly, help to reduce the wiring area of printed circuit board (PCB), help the miniaturization of electronic system because each power supply chip can connect corresponding divider resistance circuit able to programme nearby among the present invention.
In actual applications, because each power supply chip has been carried out standardization setting, need not to repeat to research and develop power management chip for each money is powered chip, get final product and only need when production is powered chip, also carry out relative set, so just can avoid constantly researching and developing the huge R﹠D costs that new power supply management system is brought for correspondence is powered the continuous upgrading of chip in the prior art.
Above-mentioned explanation has fully disclosed the specific embodiment of the present invention.It is pointed out that and be familiar with the scope that any change that the person skilled in art does the specific embodiment of the present invention does not all break away from claims of the present invention.Correspondingly, the scope of claim of the present invention also is not limited only to previous embodiment.
Claims (9)
1. power-supply management system, the chip that is powered that it comprises several power supply chips and has several service areas, it is characterized in that: each power supply chip provides power supply by a pin for a described service area that is powered in the chip, the described chip internal that is powered is provided with several programmable resistance bleeder circuits
Each programmable resistance bleeder circuit is gathered the described supply voltage that is powered a service area in the chip, and generate a feedback voltage based on this supply voltage, by another pin described feedback voltage is offered power supply chip into its corresponding service area power supply.
2. power-supply management system according to claim 1 is characterized in that: described power supply chip is DC-to-DC converter chip or linear voltage regulator chip.
3. power-supply management system according to claim 2 is characterized in that: described DC-to-DC chip comprises four pins, and described four pins are respectively: the input power pin, pin, feedback signal pin and switch output pin; Described linear voltage regulator comprises four pins, and described four pins are respectively: the input power pin, pin, feedback signal pin and voltage output pin.
4. according to the arbitrary described power-supply management system of claim 1-3, it is characterized in that: described programmable resistance bleeder circuit comprises supply voltage and several resistance between the ground and several switches in parallel with each resistance respectively that are series at corresponding service area, the control end of each switch is controlled by the described control signal that is powered chip, an intermediate node of several resistance of series connection is as feedback node, and the voltage on the described feedback node is used as described feedback voltage.
5. power-supply management system according to claim 4 is characterized in that: be provided with several resistance between the supply voltage of corresponding service area and feedback node, be provided with several resistance between described feedback signal output node and ground.
6. power-supply management system according to claim 4, it is characterized in that: described programmable resistance bleeder circuit also comprises an enable switch, a link of described enable switch connects predetermined voltage, another link connects described feedback node, and the control end of described enable switch connects an enable signal.
7. power-supply management system according to claim 6, it is characterized in that: described power supply chip comprises a comparator and control circuit, an input of described comparator receives described feedback voltage, another input connects a reference voltage, its output output is used to control the enable signal that described control circuit enables, described control circuit receives described feedback voltage, and provides power supply for the service area of correspondence.
8. power-supply management system according to claim 7 is characterized in that: described reference voltage is arranged between the supply voltage of the normal working voltage of feedback voltage and corresponding service area, and described predetermined voltage is the supply voltage of corresponding service area.
9. power-supply management system according to claim 1 is characterized in that: the voltage sample point in the described divider resistance circuit able to programme is arranged on the supply voltage extreme lower position of the corresponding service area that is powered in the chip.
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| CN107786150A (en) * | 2017-11-28 | 2018-03-09 | 北京索德电气工业有限公司 | A kind of electric automobile driving power control system and its control method |
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| CN110138218A (en) * | 2019-06-25 | 2019-08-16 | 深圳市海浦蒙特科技有限公司 | A kind of band-type brake power supply of adjustable output voltage |
| CN110138218B (en) * | 2019-06-25 | 2020-08-11 | 深圳市海浦蒙特科技有限公司 | Band-type brake power supply with adjustable output voltage |
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