CN102448214A - Power management circuit and control circuit thereof - Google Patents
Power management circuit and control circuit thereof Download PDFInfo
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- CN102448214A CN102448214A CN201010506919XA CN201010506919A CN102448214A CN 102448214 A CN102448214 A CN 102448214A CN 201010506919X A CN201010506919X A CN 201010506919XA CN 201010506919 A CN201010506919 A CN 201010506919A CN 102448214 A CN102448214 A CN 102448214A
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Abstract
The invention discloses a power management circuit and a control circuit thereof. The power management circuit is driven by a main outside power supply, and comprises a first circuit, a second circuit, a voltage stabilizing capacitor, a voltage stabilizing circuit and a switching circuit. The first circuit is used for carrying out the first function while the second circuit is used for carrying out the second function; the voltage stabilizing circuit with a voltage-stabilization capacitor is coupled to the main outside power supply; the voltage-stabilization capacitor can provide a direct-current voltage to the first circuit and the second circuit. The switching circuit is coupled with the main outside power, the voltage-stabilization capacitor and the first circuit, wherein the switching circuit further comprises a detecting unit and a switching unit; the detecting unit is used for producing a conductive signal and an off signal according to the main outside power supply; the switching unit is coupled to the detecting unit; when receiving the conductive signal, the voltage-stabilization capacitor can be conducted to supply power to the first circuit; when receiving the off signal, the voltage-stabilization capacitor is cut off to supply power to the first circuit. In the invention, the power can be supplied to the electronic element under the greatest demand, and therefore the utilization efficiency of the power can be raised.
Description
Technical field
The present invention relates to a kind of electric energy management circuit and control circuit thereof, particularly a kind of through changing supply path, to improve the electric energy management circuit and the control circuit thereof of power consumption efficiency.
Background technology
Because the lasting progress of technology; Make a large amount of circuit elements can be fabricated on the one chip; Add on the market complexity height and the strong demand of language function, make whole system comprise microprocessor, memory etc. all might be integrated on the same chip; To reach plurality of advantages such as low-power, high-effect, small size and high-reliability; And this a plurality of circuit that have difference in functionality respectively can be integrated into a single chip (Chip), that is the system single chip that is commonly called as (System-on-a-Chip, SoC).
Yet; Along with on the market under the increasing trend of the demand of language function; The increase that the engineer makes great efforts is integrated into the circuit quantity of chip, but the also lifting relatively of its complexity and degree of difficulty, for example how is partitioned into each function square at the superiors' circuit of chip; And after synthetic and layout are accomplished, can reach sequential requirement, how to make allocation plan or the like difficult problem in chip stratum; In addition, circuit also can disturb with between circuit, so the importance of signal integrity (signal integrity) and reliability (reliability) promotes day by day; The for example processing of noise (noise), electromagnetic interference (electromagnetic interference, control EMI) etc.
Comparatively speaking; The power supply of system single chip is handled and for the engineer, is seemed and be not so important; The engineer often payes attention to the design of pressurizer (Regulator) in the chip; In chip, mark off the supply that a plurality of voltage configuration blocks (multiple voltage island) come the circuit of difference in functionality is carried out electric energy through pressurizer; As long as (for example external power source or inner storage capacitor) under the lasting supply of electrical energy arranged, each voltage configuration block does not have other difference except the difference of voltage requirements, and good voltage configuration block design can't influence and improve the whole power consumption efficiency of chip.
Therefore; How proposing a kind of method or means comes the circuit of voltage configuration block is designed; Except that essential driven is provided; And under the prerequisite such as simple and lower cost, more effectively improving the efficient of electricity consumption at uncomplicated, the element of design, this is to be that relevant speciality field personage makes great efforts improved target for a long time always.
Summary of the invention
The object of the present invention is to provide a kind of through changing supply path, to improve the electric energy management circuit and the LED control circuit thereof of power consumption efficiency.
Electric energy management circuit according to disclosed is driven by an outside main power source, and this electric energy management circuit comprises that one first circuit, a second circuit, an electric capacity of voltage regulation, a voltage stabilizing circuit and switch circuit.First circuit is in order to carry out one first function; Second circuit is in order to carry out one second function; Voltage stabilizing circuit is coupled to outside main power source and has an electric capacity of voltage regulation; Outside main power source charges to electric capacity of voltage regulation through voltage stabilizing circuit, so that electric capacity of voltage regulation is able to provide direct current voltage to the first circuit and a second circuit.Commutation circuit is coupled to outside main power source, electric capacity of voltage regulation and first circuit; And comprise a detecting unit and a switch element, and detecting unit produces a Continuity signal and a pick-off signal according to outside main power source, and switch element is coupled to detecting unit; When receiving Continuity signal; The conducting electric capacity of voltage regulation when receiving pick-off signal, cuts off the power supply of electric capacity of voltage regulation to first circuit to the power supply of first circuit.
Wherein, Electric energy management circuit of the present invention can be applicable to a chip; Described first function of first circuit then defines the key operation in the chip execution for this reason; Second function of second circuit then for the auxiliary necessary function of major function, it should be noted that this first circuit or second circuit only are the definition on the noun.A for example disclosed embodiment, first circuit are a pulse width modulation (Pulse-Width Modulation, PWM) control unit; In order to control the dimming function of a light-emitting diode (LED) module, second circuit then is a memory cell, in order to store the state of present light-emitting diode luminance; For light-emitting diode (LED) module, both circuit and it doesn't matter first or second branch, maximum difference is; The PWM control unit is executed under the environment of continued power, and when power supply is disconnected (light-emitting diode extinguishes), the PWM control unit does not have requirements of one's work; Otherwise; Because memory cell is in order to the state of storage brightness, when power supply is disconnected, must be dependent on power on other energy storage medium perhaps of circuit and keeps the memory function of memory cell.In sum, first circuit and second circuit except the difference of function, the second circuit of this indication of the present invention be one need to continue power supply supply with can operate as normal circuit, memory circuit for example.
Wherein, the generation of pick-off signal is meant when outside main power source and is closed, and detection is during less than the existing of outside main power source; Through the mode of voltage or current detecting, corresponding this pick-off signal that sends, otherwise; When detection to when the outside main power source, then send Continuity signal.
According to disclosed LED control circuit; Use above-mentioned electric energy management circuit; A kind of pulse width modulation (Pulse-Width Modulation that stores dimming state is provided; PWM) LED control circuit is used the pulse bandwidth modulation technique and is come a light-emitting diode (LED) module is carried out light modulation, and LED control circuit comprises a switch, a detecting unit, a memory cell, a PWM control unit, an electric capacity of voltage regulation, a voltage regulation unit and a switching unit.Switch couples an outside main power source and comprises that one opens (ON) state and and closes (OFF) state, detecting unit; Be coupled to switch and corresponding opening and send one first signal, corresponding closed condition is sent a secondary signal, memory cell; A luminance that couples detecting unit and store light-emitting diode (LED) module, the PWM control unit is coupled to memory cell and controls signal to light-emitting diode (LED) module according to luminance transmission one; To carry out light modulation, electric capacity of voltage regulation provides direct current voltage a to memory cell and PWM control unit; Voltage regulation unit couples outside main power source electric capacity of voltage regulation is charged switch unit; Be coupled to detecting unit, electric capacity of voltage regulation and PWM control unit, switch unit is according to first signal or the corresponding conducting of secondary signal or end the power supply of electric capacity of voltage regulation to the PWM control unit.
Beneficial effect of the present invention is; Through above-mentioned circuit and LED control circuit framework thereof, when outside main power source is closed, because voltage stabilizing circuit will no longer charge to electric capacity of voltage regulation; Under the limited energy storage size of electric capacity of voltage regulation; The present invention changes the path of power supply through the mode of the outside main power source of detection, and electric energy is provided to the electronic component that needs most, and has improved the efficient of utilization of power.
About characteristic of the present invention, execution mode and effect, conjunction with figs. is done the most preferred embodiment detailed description as follows now.
Description of drawings
Fig. 1 is the configuration diagram of the electric energy management circuit of power-switching circuit of the present invention.
Fig. 2 A is the circuit diagram of an embodiment of Fig. 1 commutation circuit.
Fig. 2 B is the circuit diagram of another embodiment of Fig. 1 commutation circuit.
Fig. 3 is the sketch map of LED control circuit of the present invention.
Fig. 4 is the circuit diagram of an embodiment of Fig. 3 memory cell.
Wherein, description of reference numerals is following:
10 first circuit
11 second circuits
12 voltage stabilizing circuits
13 electric capacity of voltage regulation
14 commutation circuits
141 detecting units
142 switch elements
20 outside main power sources
30 memory cell
31 pulse width modulation control units
32 voltage regulation units
33 light-emitting diode (LED) modules
40 inverters
41 first flip-flops
42 second flip-flops
43 the 3rd flip-flops
44 the 4th flip-flops
45 second NAND gates
The TR transistor
R1 first resistance
R2 second resistance
The D silicon reference diode
NAND first NAND gate
The SW switch
N1 first voltage port
D1 first input end mouth
Q1 first output port
N2 second voltage port
D2 second input port
Q2 second output port
N3 tertiary voltage port
D3 the 3rd input port
Q3 the 3rd output port
N4 the 4th voltage port
D4 four-input terminal mouth
Q4 the 4th output port
R replacement port
CLK clock pulse input terminal mouth
Embodiment
Please refer to shown in Fig. 1, Fig. 2 A and Fig. 2 B; Fig. 1 is the configuration diagram of the electric energy management circuit (power managing circuit) of power-switching circuit of the present invention; Fig. 2 A is the circuit diagram of an embodiment of Fig. 1 commutation circuit, and Fig. 2 B is the circuit diagram of another embodiment of Fig. 1 commutation circuit.The electric energy management circuit is by 20 drivings of an outside main power source, and this electric energy management circuit comprises that one first circuit 10, a second circuit 11, an electric capacity of voltage regulation 13, a voltage stabilizing circuit 12 and switch circuit 14.First circuit 10 is in order to carry out one first function; Second circuit 11 is in order to carry out one second function; Voltage stabilizing circuit 12 is coupled to outside main power source 20 and has an electric capacity of voltage regulation 13; Outside main power source 20 is through 13 chargings of 12 pairs of electric capacity of voltage regulation of voltage stabilizing circuit, so that electric capacity of voltage regulation 13 is able to provide direct current voltage to the first circuit 10 and a second circuit 11.Commutation circuit 14 is coupled to outside main power source 20, electric capacity of voltage regulation 13 and first circuit 10; Commutation circuit 14 comprises a detecting unit 141 and a switch element 142, and detecting unit 141 produces a Continuity signal and a pick-off signal according to outside main power source 20, and switch element 142 is coupled to detecting unit 141; When receiving Continuity signal; The power supply of 13 pairs first circuit 10 of conducting electric capacity of voltage regulation when receiving pick-off signal, is cut off the power supply of 13 pairs first circuit 10 of electric capacity of voltage regulation.
Wherein, Electric energy management circuit of the present invention can be applicable to a chip; First circuit, 10 described first functions then define the key operation in the chip execution for this reason; Second function of second circuit 11 then for the auxiliary necessary function of major function, it should be noted that this first circuit 10 or second circuit 11 only are the definition on the noun.For instance, first circuit 10 can be a pulse width modulation (Pulse-Width Modulation, PWM) control unit; In order to control the dimming function of a light-emitting diode (LED) module, second circuit 11 then is a memory cell, in order to store the state of present light-emitting diode luminance; For light-emitting diode (LED) module, both circuit and it doesn't matter first or second branch, maximum difference is; The PWM control unit is executed under the environment of continued power, and when power supply was disconnected, the PWM control unit did not have requirements of one's work (because light-emitting diode extinguishes); Otherwise; Because memory cell in order to the state of storage brightness, when power supply is disconnected, must be dependent on the memory function that electric capacity of voltage regulation 13 on the circuit or other energy storage medium are kept memory cell.In sum, first circuit 10 and second circuit 11 except the difference of function, the second circuit 11 of this indication of the present invention be one need to continue power supply supply with can operate as normal circuit.
Wherein, The generation of pick-off signal refers to be closed when outside main power source 20, when detecting unit 141 detects less than the existing of outside main power source 20, through the mode of voltage or current detecting; Corresponding this pick-off signal that sends; Otherwise, when detecting unit 141 detects outside main power source 20, then send Continuity signal.
Please again with reference to shown in figure 2A and Fig. 2 B; This two accompanying drawing discloses the embodiment of two kinds of commutation circuits; Both maximum differences are the difference of detecting unit 141, and the detecting unit 141 shown in Fig. 2 A is one to have the silicon reference diode D of negative electrode and anode, and the negative electrode of silicon reference diode D is coupled to outside main power source 20 and switch element 142; 141 of detecting units shown in Fig. 2 B are that first resistance R 1 and second resistance R, 2, the first resistance R 1 and 2 of second resistance R of one group of serial connection is coupled to switch element 142.Switch element 142 is made up of one first a NAND gate NAND and a transistor T R; The first NAND gate NAND has a first input end, one second input and an output; The first input end of the first NAND gate NAND is coupled to this detecting unit 141; Second input couples electric capacity of voltage regulation 13, and transistor T R has drain electrode (drain), one source pole (source) and a grid (gate), and the drain electrode of transistor T R is coupled to first circuit 10; The source electrode of transistor T R is coupled to electric capacity of voltage regulation 13, and the grid of transistor T R couples the output of the first NAND gate NAND.
In order more clearly to narrate commutation circuit characteristic of the present invention, below for the explanation of the accurate position of signal voltage, will represent high potential with logical one; Represent electronegative potential with logical zero, it should be noted that this is merely the usefulness in order to the illustration of narration relativeness; Be not in order to limit technical characterictic of the present invention; In addition, though detecting unit 141 has two kinds of various embodiment in this specification, both operation principles are identical; So is that an integral body describes in this with detecting unit 141, and separately do not describe to embodiment out of the ordinary.
At first; When outside main power source 20 provided voltage a to commutation circuit 14, detecting unit 141 was Continuity signal according to the first input end of signal to the first NAND gate NAND of the voltage transmission one " 1 " of outside main power source 20 in this signal that defines this " 1 "; Simultaneously; Because second input of the first NAND gate NAND is coupled to electric capacity of voltage regulation 13, for second input, the signal of electric capacity of voltage regulation 13 inputs one " 1 "; The first NAND gate NAND is according to the signal of being imported; The signal of output one " 0 " to the grid of transistor T R, the source electrode of transistor T R is obtained the signal of " 1 ", the then supply path of 13 pairs first circuit 10 of conducting electric capacity of voltage regulation from electric capacity of voltage regulation 13.
Anti-, if outside main power source 20 is closed, 141 detections of detecting unit are less than the voltage of outside main power source; At this moment; The first input end of signal to the first NAND gate NAND of detecting unit 141 transmissions one " 0 " is a pick-off signal in this signal that defines this " 0 ", and the first NAND gate NAND is according to the signal of being imported; The signal of output one " 1 " is to the grid of transistor T R; Be all at grid and source electrode under the state of " 1 ", transistor T R cuts off the power supply of 13 pairs first circuit 10 of electric capacity of voltage regulation, makes electric capacity of voltage regulation 13 only to second circuit 11 power supplies.
Please refer to shown in Figure 3ly, Fig. 3 is the sketch map of LED control circuit of the present invention.Above-mentioned electric energy management circuit can be applicable to a LED control circuit; According to disclosed LED control circuit; Use the pulse bandwidth modulation technique and come a light-emitting diode (LED) module is carried out light modulation, LED control circuit comprises a switch SW, a detecting unit 141, a memory cell 30, a PWM control unit 31, an electric capacity of voltage regulation 13, a voltage regulation unit 32 and a switching unit 142.Switch SW couples an outside main power source 20 and comprises that one opens (ON) state and and closes (OFF) state; Detecting unit 141 is coupled to switch SW and corresponding opening is sent one first signal; Corresponding closed condition is sent a secondary signal; Memory cell 30 couples detecting unit 141 and stores a luminance of a light-emitting diode (LED) module 33; PWM control unit 31 is coupled to memory cell 30 and sends one according to luminance and controls signal to light-emitting diode (LED) module 33, and to carry out light modulation, electric capacity of voltage regulation 13 provides direct current voltage a to memory cell 30 and PWM control unit 31; Voltage regulation unit 32 couples outside main power source 20 so that electric capacity of voltage regulation 13 is charged; This electric capacity of voltage regulation 13 provides a direct current voltage to this memory cell 30 and this PWM control unit 13, and switch unit 142 is coupled to detecting unit 141, electric capacity of voltage regulation 13 and PWM control unit 31, and switch unit 142 is according to the corresponding conducting of first signal or secondary signal or by the power supply of 13 pairs of PWM control units 31 of electric capacity of voltage regulation.
Wherein, this switch SW can be the switch that is arranged on the wall.
Wherein, this detecting unit 141 is connected in series with one second resistance R 2 by one first resistance R 1 and forms, and an end of first resistance R 1 is coupled between switch SW and the voltage regulation unit 32, and the other end of first resistance R 1 couples second resistance R 2.
Wherein, This switch element 142 comprises one first a NAND gate NAND and a transistor T R; The first NAND gate NAND has a first input end, one second input and an output, and first input end couples between first resistance R 1 and second resistance R 2, and second input couples electric capacity of voltage regulation 13.Transistor T R has a drain electrode, one source pole and a grid, and drain electrode couples PWM control unit 31, and source electrode couples this electric capacity of voltage regulation 13, and grid couples the output of the first NAND gate NAND.
Please refer to shown in Figure 4ly, Fig. 4 is the circuit diagram of an embodiment of Fig. 3 memory cell, and memory cell 30 comprises one second NAND gate 45, an inverter 40, one first flip-flop 41, one second flip-flop 42, one the 3rd flip-flop 43 and one the 4th flip-flop 44.First flip-flop 41 has one first voltage port N1, a first input end mouth D1, one first output port Q1, a replacement port R and a clock pulse input port CLK.Second flip-flop 42 has one second voltage port N2, one second input port D2, one second output port Q2, a replacement port R and a clock pulse input port CLK.The 3rd flip-flop 43 has a tertiary voltage port N3, one the 3rd input port D3, one the 3rd output port Q3, a replacement port R and a clock pulse input port CLK.The 4th flip-flop 44 has one the 4th voltage port N4, a four-input terminal mouth D4, one the 4th output port Q4, a replacement port R and a clock pulse input port CLK.Each voltage port N1～N4 all is coupled to electric capacity of voltage regulation 13, and by electric capacity of voltage regulation 13 needed supply of electrical energy is provided, and first input end mouth D1 is coupled to the first voltage port N1.
First inverter 40; Have an input and an output; Input couples detecting unit 141, and in order to receive first signal or secondary signal, output couples the clock pulse input terminal mouth CLK of first to fourth flip-flop 41～44; First inverter 40 according to first signal or secondary signal (that is on off state of outside main power source 20) in regular turn the output state to first to fourth flip-flop 41～44 change, with foundation as luminance.Second NAND gate 45 comprises a first input end, one second input and an output; First input end is coupled to the 4th output port Q4 of the 4th flip-flop 44; Second input couples detecting unit 141; In order to receive first signal or secondary signal, output couples the replacement port R of each flip-flop 41～44, when the input signal of the first input end of second NAND gate 45 and second input is all the signal of " 1 "; The signal that output is then exported one " 0 " each flip-flop 41～44 of resetting, defining this signal in order to " 0 " of resetting in this is a reset signal.Yet the principle of utilizing flip-flop to come store status to change is known by those skilled in the art, so do not give unnecessary details in this.Under tabulate 1 representative memory cell 30 in the pairing logic bit of each luminance.
Table 1
| First flip- |
Second flip- |
The 3rd flip- |
The 4th flip-flop 44 | |
| 100％ | 0 | 0 | 0 | 0 |
| 60％ | 1 | 0 | 0 | 0 |
| 30％ | 1 | 1 | 0 | 0 |
| 10％ | 1 | 1 | 1 | 0 |
(% is a percentage)
It should be noted that; The described memory cell 30 of present embodiment is formed by 4 groups of flip-flop serial connections; Those skilled in the art all know; Memory cell can reach the storage with more multiple light state through the quantity of increase and decrease flip-flop, and this embodiment is not in order to limit technical characterictic of the present invention in this usefulness that is merely illustration.
In sum; Electric energy management circuit of the present invention and LED control circuit thereof are when outside main power source is closed, because voltage stabilizing circuit will no longer charge to electric capacity of voltage regulation; Under the limited energy storage size of electric capacity of voltage regulation; The present invention changes the path of power supply through the mode of the outside main power source of detection, electric energy is provided to the electronic component that needs most, to have improved the efficient of utilization of power.
Claims (10)
1. an electric energy management circuit is applied to a chip, and this chip is driven by an outside main power source and comprises a voltage stabilizing circuit, and this electric energy management circuit comprises:
One first circuit is in order to carry out one first function;
One second circuit is in order to carry out one second function;
One electric capacity of voltage regulation couples this voltage stabilizing circuit, and to provide a direct current voltage to this first circuit and this second circuit, wherein, this outside main power source charges to this electric capacity of voltage regulation through this voltage stabilizing circuit; And
One switches circuit, is coupled to this outside main power source, this electric capacity of voltage regulation and this first circuit, and this commutation circuit is according to this outside main power source conducting or by the power supply of this electric capacity of voltage regulation to this first circuit.
2. electric energy management circuit as claimed in claim 1 is characterized in that, this commutation circuit comprises:
One detecting unit produces a Continuity signal and a pick-off signal according to this outside main power source; And
One switch element; Be coupled to this detecting unit and in order to receive this Continuity signal or this pick-off signal, when receiving this Continuity signal, this this electric capacity of voltage regulation of switch element conducting is to the power supply of this first circuit; When receiving this pick-off signal, cut off of the power supply of this electric capacity of voltage regulation to this first circuit.
3. electric energy management circuit as claimed in claim 2 is characterized in that, this detecting unit is one to have the silicon reference diode of a negative electrode and an anode, and this negative electrode of this silicon reference diode is coupled to this outside main power source and this switch element.
4. electric energy management circuit as claimed in claim 2 is characterized in that, this detecting unit comprises one first resistance and one second resistance, and this switch element is coupled between this first resistance and this second resistance.
5. electric energy management circuit as claimed in claim 2 is characterized in that, this switch element comprises:
One first NAND gate has a first input end, one second input and an output, and this first input end of this first NAND gate couples this detecting unit, and this second input of this first NAND gate couples this electric capacity of voltage regulation; And
One transistor has a drain electrode, one source pole and a grid, and this transistorized this drain electrode couples this first circuit, and this transistorized this source electrode couples this electric capacity of voltage regulation, and this transistorized this grid couples this output of this first NAND gate.
6. electric energy management circuit control circuit, the apply pulse width modulated comes a light-emitting diode (LED) module is carried out light modulation, and this electric energy management circuit control circuit comprises:
One switch couples an outside main power source and comprises an opening and a closed condition;
One detecting unit couples this switch and to should opening sending one first signal, to should closed condition sending a secondary signal;
One memory cell, a luminance that couples this detecting unit and store this light-emitting diode (LED) module;
One PWM control unit couples this memory cell and controls signal to this light-emitting diode (LED) module according to this luminance transmission one, to carry out light modulation;
One voltage regulation unit couples this outside main power source and to electric capacity of voltage regulation charging, this electric capacity of voltage regulation provides a direct current voltage to this memory cell and this PWM control unit; And
One switching unit couples this detecting unit, this electric capacity of voltage regulation and this PWM control unit, and this switch unit is according to this first signal or the corresponding conducting of this secondary signal or end the power supply of this electric capacity of voltage regulation to this PWM control unit.
7. electric energy management circuit control circuit as claimed in claim 6; It is characterized in that; This detecting unit is connected in series with one second resistance by one first resistance and forms, and an end of this first resistance is coupled between this switch and this voltage regulation unit, and the other end of this first resistance couples this second resistance.
8. electric energy management circuit control circuit as claimed in claim 7 is characterized in that this switch unit comprises:
One first NAND gate has a first input end, one second input and an output, and this first input end of this first NAND gate couples between this first resistance and this second resistance, and this second input of this first NAND gate couples this electric capacity of voltage regulation; And
One transistor has a drain electrode, one source pole and a grid, and this drain electrode couples this PWM control unit, and this source electrode couples this electric capacity of voltage regulation, and this grid couples this output of this first NAND gate.
9. electric energy management circuit control circuit as claimed in claim 6 is characterized in that, this switch is one to be arranged at the switch on the wall.
10. electric energy management circuit control circuit as claimed in claim 6 is characterized in that this memory cell comprises:
One first flip-flop; Have one first voltage port, a first input end mouth, one first output port, a replacement port and a clock pulse input port; Wherein, this first input end mouth couples this first voltage port, and this first voltage port is coupled to this electric capacity of voltage regulation;
One second flip-flop has one second voltage port, one second input port, one second output port, a replacement port and a clock pulse input port;
One the 3rd flip-flop has a tertiary voltage port, one the 3rd input port, one the 3rd output port, a replacement port and a clock pulse input port;
One the 4th flip-flop has one the 4th voltage port, a four-input terminal mouth, one the 4th output port, a replacement port and a clock pulse input port;
One first inverter; Have an input and an output; This input of this first inverter couples this detecting unit; In order to receive this first signal or this secondary signal, this output of this first inverter couples said clock pulse input terminal mouth, and in regular turn the output state of this first to the 4th flip-flop is changed according to this first signal or this secondary signal; And
One second NAND gate; Comprise a first input end, one second input and an output; This first input end of this second NAND gate couples the 4th output port of the 4th flip-flop, and this second input of this second NAND gate couples this detecting unit, in order to receive this first signal or this secondary signal; This output of this second NAND gate couples said replacement port, exports a reset signal this first to the 4th flip-flop of resetting for this second NAND gate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010506919XA CN102448214A (en) | 2010-10-13 | 2010-10-13 | Power management circuit and control circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010506919XA CN102448214A (en) | 2010-10-13 | 2010-10-13 | Power management circuit and control circuit thereof |
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| CN102448214A true CN102448214A (en) | 2012-05-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101236452A (en) * | 2007-01-31 | 2008-08-06 | 扬智科技股份有限公司 | Power supply management device and power supply management process |
| US20090174347A1 (en) * | 2008-01-08 | 2009-07-09 | Mitsumi Electric Co., Ltd. | Direct-current power supply device, power supply device for driving led and semiconductor integrated circuit for driving power supply |
| CN201340557Y (en) * | 2009-01-21 | 2009-11-04 | 徐州市精英电器技术有限公司 | Medical used thermoregulator with power-down alarm and continuous temperature measuring function |
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- 2010-10-13 CN CN201010506919XA patent/CN102448214A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330302A (en) * | 2000-06-23 | 2002-01-09 | 睿阳科技股份有限公司 | UPS system able to automatically store computer data to hard disk in suspend state |
| CN1647014A (en) * | 2002-03-11 | 2005-07-27 | 英特尔公司 | A power-down scheme for an on-die voltage differentiator design |
| CN101236452A (en) * | 2007-01-31 | 2008-08-06 | 扬智科技股份有限公司 | Power supply management device and power supply management process |
| US20090174347A1 (en) * | 2008-01-08 | 2009-07-09 | Mitsumi Electric Co., Ltd. | Direct-current power supply device, power supply device for driving led and semiconductor integrated circuit for driving power supply |
| CN201340557Y (en) * | 2009-01-21 | 2009-11-04 | 徐州市精英电器技术有限公司 | Medical used thermoregulator with power-down alarm and continuous temperature measuring function |
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Application publication date: 20120509 |