140results about How to "Reduce your own power consumption" patented technology

A wide-range input direct-current rectification filter circuit comprises an over-current protection circuit, an overvoltage protection circuit, a filter circuit, a voltage reducing circuit, a voltage boosting circuit and an output circuit, wherein an output end of the over-current protection circuit is connected with an input end of the overvoltage protection circuit, an output end of the overvoltage protection circuit is connected with an input end of the filter circuit, an output end of the filter circuit is connected with an input end of the voltage reducing circuit, an output end of the voltage reducing circuit is connected with an input end of the voltage boosting circuit, an input end of the output circuit and a feedback input end of the voltage reducing circuit are connected with an output end of the voltage boosting circuit. The voltage reducing circuit and the voltage boosting circuit are automatically started according to the size of the input voltage, the variance range of the input power source is wide, the self power consumption of the power device is small, the work efficiency is high, the circuit work mode is simple, the perimeter device is less and the reliability is high.

An equalizing charge circuit comprises a first input end, a second input end, a third input end, an output plus end, an output minus end, a detection circuit U1 and a flyback DC-DC converter 10. The junction of a drain of an N-MOS (N-channel metal oxide semiconductor) transistor Q and a primary winding NP of a transformer B is further connected with an anode of a diode D1, a cathode of the diode D1 is connected with the third input end, and a capacitor C is parallelly connected between the second input end and the third input end. The output plus end is connected on the anode of the batter pack, and the output minus end is connected on the cathode of the battery pack. When the detection circuit detects that voltage of a battery cell is larger than a set value, the converter 10 starts working, charge current to the battery cell is extracted and returned to charge the chatter pack, energy generated by leakage inductance of the flyback converter can be used for charging a previous battery cell, and accordingly equalizing charge of the battery pack is realized; when the detection circuit U1 composed of a single chip microcomputer is utilized, an infrared receiving head is added to synchronously adjust a set value, and equalizing discharge can be realized. The flyback circuit is high in reliability, simple in composition, low in cost, high in efficiency and easy to maintain.

The invention discloses a device for improving output efficiency of a miniwatt photovoltaic cell and a method thereof, belonging to the electrooptical technical field. In the invention, based on the optimum voltage control method, by arranging a supercapacitor and an optimum voltage controller between the photovoltaic cell and an energy accumulator and taking advantage of the characteristic of low essential resistance of the supercapacitor, the terminal voltage Vc of the supercapacitor directly affects the output voltage Vs of the photovoltaic cell; and by controlling the charge-discharge process of the supercapacitor to control the output voltage of the photovoltaic cell, the photovoltaic cell can work in a maximum power output area, thus effectively improving the output efficiency of the photovoltaic cell. Compared with the traditional method, the invention has the advantages of simple circuit and low self power consumption, and is suitable for being used in a miniwatt micro photovoltaic system.

The voltage adjuster includes band-gap reference voltage source, voltage detection and feed back unit, auto bias circuit, frequency compensation circuit, and driver output circuit. The reference voltage source generates reference voltage and bias current. The voltage detection and feed back unit detects voltage output from the voltage adjuster, and feeds back the output voltage to the auto bias circuit and the control circuit of the drive tube or controlling bias circuit and driving capability automatically. The frequency compensation circuit guarantees tolerance of phase in whole loop and speed of transient response of voltage adjuster to make steady operation, and quick transient response of adjuster close loop. Features are: very low own power consumption, wide operating range, realized by standard CMOS technique, simplified design of voltage adjuster effectively, and raised performance of adjuster.

The invention discloses a self-adaptive current mirror, which is composed of a plurality of sub current mirrors which are connected in series, wherein each sub current mirror comprises an input circuit unit, a plurality of output circuit units, a voltage detection and control unit and a negative feedback impedance regulating unit. The input circuit unit and the output circuit unit are formed by connecting a basic transistor and a standby transistor in parallel, a switch is arranged between the basic transistor and the standby transistor, the transistors are of the same type, have the save threshold voltage and both work in a linear area. The voltage detection and control unit detects the grid voltages of the transistors in the input circuit unit and the output circuit unit, compares the grid voltages with two preset voltage references, controls the on and off of the switch according to the result of the comparison, and controls the on and off of the standby transistor for regulating the range of an output current. In the invention, the range of the output current of the conventional current mirror is expanded, and a high constant current precision is kept within a wide range of the output current.

The invention discloses a ZIGBEE-based parking lot intelligent monitoring and guiding system. The system is realized based on mobile phone client APPs of car owners and comprises an inlet and outlet monitoring apparatus of a ZIGBEE module, and an intelligent monitoring and NFC apparatus. The inlet and outlet monitoring apparatus is used for detecting and recording vehicles going into and out of a parking lot. The intelligent monitoring and NFC apparatus is used for monitoring state information of each parking place in the parking lot, can perform early warning monitoring on such situations of a fire hazard, a flood and the like at the same time and positions the parking places. The inlet and outlet monitoring apparatus is in wireless communication connection with the intelligent monitoring and NFC apparatus. The system provided by the invention is simple in structure, can improve management of the parking lot for the vehicles going into and out of the parking lot, at the same time and ensures safety of the vehicles of the car owners, thereby being suitable for any parking lots.

The invention provides a modular large-power LED street lamp and a standardized LED light source module unit thereof. Modular large-power LED street lamps with different powers adopt standardized LED light source module units with the same specification to assemble, each standardized LED light source module unit makes an individual radiation and is matched with an independent constant current source module, the heat and the electricity among the LED light source module units are completely independent, thereby realizing the modularization in broad sense, realizing the unified standardization of the production and the installation, being convenient to install and maintain, and greatly decreasing the cost. An LED illuminant of each LED light source module unit is directly fixed on the bottom surface of a central cavity of a high dissipating lamp holder, the outer circumferential surface of the lamp holder is provided with radiating blades, a base of the high dissipating lamp holder is provided with a radiating hole, the base is in open-mouthed fit with an upper cover, the horizontal air and the longitudinal air have a smooth convection, thereby providing a reliable and effective guarantee for the whole radiation of a lamp cap.

The invention discloses a driving power supply of a ballast type LED (Light-Emitting Diode) lamp, comprising a capacitor (C) and a low-consumption inductive ballast (L). The driving power supply is characterized in that a rectifying element (D) is connected between the A end and an input N end of the low-consumption inductive ballast (L); and the LED lamp is connected between rectifying output ends (B and C). The driving power supply has the advantages of less self power consumption, low temperature rise, long service life, fewer elements, high working reliability and less harmonic content. The driving power supply is an ideal driving power supply of the LED lamp.

The invention discloses a power management circuit of a multi-core processor. An optional core processor or a core processor group of the multi-core processor can independently select a channel of suitable voltage from multiple channels of voltage outputs provided by a switch power source via a power grid on a chip according to load (idling degree). By means of providing different voltages to the different core processors or core processor groups of the multi-core processor, self power consumption of the multi-core processor is reduced, energy is saved, and duration time of a battery during power supply is prolonged.

The invention discloses a device and a method for searching a fallen unmanned plane. The device comprises a plane falling monitoring modules which are arranged on an unmanned plane and connected to each other and a power supply module having a positioning function; the plane falling monitoring module is connected to a power portion of the unmanned plane for monitoring whether the power portion is abnormal in real time and controls to output a first control signal to a power supply module; and a power supply module supplies power to the unmanned plane.

The invention relates to a three-phase charge-controlled intelligent electric energy meter, and provides a low-power-consumption three-phase charge-controlled intelligent electric energy meter in which a three-phase charge-controlled electric energy meter power supply scheme is based on a resistance-capacitance voltage reduction principle and a low-voltage direct-current / direct-current (DC / DC) conversion power supply. The electric energy meter comprises a line power supply, an auxiliary power supply, a singlechip central processing unit (CPU) and a three-phase charge-controlled intelligent electric energy meter basic function module, wherein the line power supply consists of a resistance-capacitance voltage reduction circuit, a low-voltage DC / DC switching power supply circuit and a 485 power supply control circuit which are connected in turn; the auxiliary power supply is a switching power supply circuit; a pulse output booster circuit at an input / output (IO) port provides working voltage for a liquid crystal display part of the three-phase charge-controlled electric energy meter; and an external battery power supply circuit of the three-phase charge-controlled electric energy meter consists of an external battery which is matched with a DC-DC booster circuit to provide a power supply for meter reading during power failure. Power supply efficiency can be effectively improved, the power consumption of the electric energy meter is reduced, cost is reduced, and the requirements of energy conservation and environment friendliness are met.

A regulating valve used for accurately positioning a valve plug and regulating pressure or flow rate of fluid in a fluid transportation pipeline is especially suitable for power station, petroleum and chemical department, belonging to the field of engineering elements or parts. The regulating valve comprises three parts which are a valve body, a driving cylinder and a servo mechanism, and the valve body having the conventional structure of a stop valve is combined with the driving cylinder that is internally provided with a piston into a whole; a channel used for drawing in the controlled fluid is also processed; the servo mechanism mainly includes a servo pipe and a screw gearing pair (or a pinion and rack gearing pair). The gap between the end surface of the servo pipe and the end surface of an axial aerial drainage hole in the center of the piston is regulated to change the differential pressure of the controlled fluid at the two sides of the piston, and the valve plug linked with the piston is further moved and is accurately balanced at the requested position. The regulating valve has the advantages that the mobile servo pipe has low power consumption (watt level), high positioning accuracy, large turndown ratio, high sensitivity, good stability and easy combination with a fluid control system having high intelligence.

The invention discloses a headset volume control circuit of a key general mobile phone. The headset volume control circuit is characterized by comprising a power processing circuit 104, a key processing circuit 101, a decoding circuit 102, a resistance switch array 103 and a microphone (MIC) output control switch 105, wherein audio signals, which are output by a mobile phone headset, of left and right sound channels respectively pass through a first resistor R1 and a second resistor R2 and then are short-circuited together to synthesize a sound; the audio signals enter the resistance switch array 103 inside the circuit through a Vh pin; and by controlling different resistance switches, the audio signals pass through resistors with different sizes and are output to an external headset loudspeaker through a Vw pin so as to control volume size. The headset volume control circuit can be applied to any mobile phone. A direct current reference level of an MIC pin of the mobile phone serves as a power supply in the headset volume control circuit, so a current which can be supplied is smaller, the own power consumption of a designed chip is quite low, and an independent power supply is not required.

The invention discloses a non-contact electric energy information acquisition controller. It solves the problems of high cost, difficult implementation, and inability to monitor and control abnormal power consumption. The acquisition and controller is composed of the part of power information collection and processing [10] and the part of power information concentration, storage, transmission and communication protocol conversion [11]: a non-contact sensor is installed at the power line entrance of the monitored target, which is controlled by electromagnetic induction. The principle detects the electric energy information, which is processed into the required electric energy parameters by the electric energy information processing module [3] and the central processing unit [4], and sent to the second part by the interface [5]; the electric energy parameters received by the second part are determined by the communication protocol The conversion module [6] and the central processing unit [7] carry out, classify, collect and store, and send the power parameters to the power information monitoring platform server [12] through the communication protocol conversion module [8] through the computer network and send control instructions to the first part , so as to realize the alarm and control the power-off of the relay module [9]. Significantly save energy and realize the monitoring of low-carbon electricity consumption.

The invention discloses a single-phase smart meter based on the impedance identification technology. The single-phase smart meter can accurately detect the relationship of voltage, current and phase of a monitored point through a voltage transformer and a current transformer, and transmits the relationship to a high-speed electric energy information processor CS5463 to be processed; the processeddata such as voltage, current, phase and the like is transmitted to a central processor through an inside SPI (Single Program Initiation) bus for further measurement so as to further obtain information such as apparent power, active power, reactive power, active electricity, power factor and the like; and the specific impedances of all electric equipments are further measured in the current electricity using state according to the impedance identification algorithm provided by the invention, and compared with an impedance value pre-stored in an EEPROM (Electrically Erasable Programmable Read-Only Memory) of the smart meter so as to obtain the specific type and model of the electric equipment in the current electricity using state. The single-phase smart meter has extremely wide application range, can guide users to change unscientific electricity utilizing habit and further improve the economic benefit of users.

The invention discloses an MEMS composite micro-energy system power supply, which comprises an MEMS micro direct methanol fuel cell, an MEMS micro solar cell, an MEMS micro super-capacitor unit, an ultra-low power consumption temperature sensor LM75B, a microprocessor ATmega168p, a power supply management chip MAX1586B and a shell, wherein the ultra-low power consumption temperature sensor LM75B is attached to the MEMS micro direct methanol fuel cell; the MEMS micro direct methanol fuel cell is connected with a main power supply pin of the power supply management chip MAX1586B; the MEMS micro solar cell is connected with a backup power supply pin of the power supply management chip MAX1586B; the MEMS micro direct methanol fuel cell and the MEMS micro super-capacitor unit are connected in parallel; and the power supply management chip MAX1586B is connected with the 8bit AVR series microprocessor ATmega168p. The MEMS composite micro-energy system power supply integrally improves the working performance and stability of MEMS micro-energy sources by compounding multiple MEMS micro-energy sources of different types into a power supply module, provides multiple standard outputs, and has the characteristics of light weight, portability, long service life, small floor area, low system power consumption, environmental protection and use repeatability.

The invention discloses an optical fiber simulated Raman scattering effect based optical neuron and an establishment method thereof. The optical neuron comprises external optical transmitters, a first local optical transmitter, a second local optical transmitter, a subtracter, a combiner, a third optical fiber, an optical filter, a first optical-electrical converter, a second optical-electrical converter and a laser diode, wherein the third optical fiber performs power cumulative summing operation by non-linear effect of simulated Raman scattering. The method includes: selecting the external optical transmitters and the first local optical transmitter, performing coupling output by the combiner, selecting the third optical fiber for power cumulative summing operation, selecting the optical filter, selecting the first optical-electrical converter, selecting the second local optical transmitter and the second optical-electrical converter, constructing the subtracter, and selecting the laser diode for converting electrical signals to optical signals. The optical neuron is novel and reasonable in design, convenient to implement, low in cost, power consumption and noise, rapid in information processing, high in expandability and practicality, good is using effect and convenient to popularize and use.

The invention belongs to agricultural machinery and discloses a screw drilling type no-tillage precision dibbling device. The screw drilling type no-tillage precision dibbling device comprises a powertransmission system, a seeding system, a zero-speed screw drilling motion driving system and a screw drilling dibbling system. The power transmission system comprises a speed reducer, a main chain wheel, a chain, a driven chain wheel, a driving shaft, a driving cylindrical gear, a driving bevel gear, a seeding bevel gear, a driven shaft and a driven cylindrical gear. The seeding system comprisesa seeder shell, a through hole type seeding plate, a seeding hose, an intermittent seed guide grooved pulley and a seed guide hose. The zero-speed screw drilling motion driving system comprises a grooved cam track plate, a T-shaped connecting rod, a roller, a slider, a seed guide frame, a slide frame, a guide rail and a supporting frame. The screw drilling dibbling system comprises a push-pull driving rod assembly, an internal threaded outer slide sleeve, an external threaded internal slide sleeve, upper and lower adjusting rod supporting seats, upper and lower adjusting rods, inner and outerpulling and pressing rods and a drill bit. The screw drilling type no-tillage precision dibbling device has advantages of high quality in dibbling and sowing operation, freeness of seed damages, low soil disturbance, low power consumption in operation, unique and novel structure and reliability in use.

The invention discloses an independent micro-power solar power supply and an implementation method thereof. The solar power supply comprises a solar cell panel support member and an efficient power supply module. The horizontal azimuth and the inclination angle of the solar cell panel support member can be manually adjusted. The support member comprises a holder frame for supporting a solar cell panel, and a holder for supporting the holder frame. The holder is capable of rotating around a vertical shaft fixed on a bearer. The holder frame is capable of swing around a horizontal shaft inserted into the holder. The power supply module comprises a rechargeable lithium battery, a super capacitor, a battery charging management device, an adjustment voltage stabilizer, a low-power-consumption micro controller and an electronic switch. By means of the power supply, the horizontal azimuth and the inclination angle of the solar cell panel can be adjusted through adjusting the placement azimuth of the holder, so that the solar cell panel is ensured to be at an optimal light-receiving angle. Through measuring the output of a solar cell, the voltage of the super capacitor and the voltage of the lithium battery, the power supply is dynamically managed by the electronic switch under the control of the micro controller. In this way, the solar energy can be efficiently collected, stored and utilized. The requirement of wireless equipment on power supply and cruising ability can be met, wherein the power stage of the wireless equipment is watt-level and below.

The invention discloses an intelligent energy environment energy-saving fresh air system which is characterized in that the intelligent energy environment energy-saving fresh air system consists of a refrigerant air conditioner, an air intake air conditioner, an exhaust device, an intelligent computer board, a temperature sensor, a humidity sensor, a smoke alarm, a monitoring interface and the like, wherein, the temperature sensor, the humidity sensor and the smoke alarm are signal collecting devices respectively connected with the interface of a signal collecting device corresponding to the intelligent computer board; the air intake air conditioner, the exhaust device and the refrigerant air conditioner are indoor air control devices respectively connected with the interface of a signal output device corresponding to the intelligent computer board and are controlled to run by parameters set by the intelligent computer board in advance. The invention has the characteristics of low power consumption, favorable energy-saving effect, wide operation range, reliable operation, powerful function of a control system, perfect monitoring function, visual and simple operation, convenient installation and maintenance and the like.

The invention discloses an intelligent-type power distribution cabinet for a power transmission system, and the cabinet comprises a cabinet body. The cabinet body is provided with a cabinet door, and the cabinet door is sequentially provided with a switch, a work indication lamp, a sound generation device, a handle, a display screen and a state indication mechanism from the top to the bottom. The cabinet enables a semispherical reflection plate to move towards the state indication lamp through the rotation of a drive motor in a strong light unit, thereby changing the propagation direction of light emitted by the state indication lamp towards the cabinet door, enabling the light intensity of the state indication lamp to be higher, and attracting more attention of a worker so as to carry out corresponding operation. Moreover, an integrated circuit in an audio output circuit is low in power consumption, is large in power voltage range, and is low in distortion, thereby improving the practicality and reliability of the audio output circuit. Meanwhile, the cabinet is small in number of external elements, reduces the production cost, and improves the market competiveness.

The invention discloses a solar power photovoltaic controller, which comprises a solar battery, a system power supply, a central integration processor, a light control voltage sampling circuit, a load switch circuit and a DC load. The solar battery provides energy source for the system power supply, and doubles as a light sensor for the system. The light control voltage sampling circuit feeds solar battery collection signal to the central integration processor to control the DC load by means of light. The invention is equipped with a protective circuit to prevent reverse charge, and a light control and sensitivity adjustment circuit. The protective circuit to prevent reverse charge charges the system power supply when exposed to light, and provides a high level sensing signal for the light control and sensitivity adjustment circuit through the light control voltage sampling circuit; and prevents the power system from reversely charging the solar battery when unexposed to light, and atthe same time, provides low level sensing signal for the light control and sensitivity adjustment circuit through the light control sampling circuit. The system works reliably and stably; the range of adjustment of light control sensitivity and working hour ingress / exit point of loads is very wide; adjustment is convenient and quick.

The invention discloses an integrative control method of ultrared human body induction and a switch. The method comprises the following steps: A. a human body enters an induction area along a direction, and a precontrol state is established, wherein the induction area is opened when the human body comes and closed when the human body leaves; B. the following situations sequentially occur; C. whenthe human body enters the second part of the induction area from the induction area, the switch enters the precontrol state; D. when the human body enters the third part of the induction area from theinduction area, the switch is in a switch-on state; and E. when the human body enters the fourth part of the induction area from the induction area, the switch enters the precontrol state. A high-efficiency power module, an ultrared pyroelectric sensor unit, a logic unit and an electronic switching device are sequentially connected, wherein the input end of the high-efficiency power module is connected with a power source; and the output end of the high-efficiency power module is sequentially connected with the power source input end of the ultrared pyroelectric sensor unit, the power sourceinput end of the logic unit and the power source input end of the electronic switching device. The invention has remarkable energy-saving effect, wide control range, high induction sensitivity, ultra-long service life, simple and convenient mounting and maintenance and reliable work.

An electronic ballast consists of signal generating circuit of push-pull pulse, abnormal state protection and automatic ignition circuit, power supply of controlled automatic regulation circuit, circuit for eliminating sound resonance, ignition circuit of sweep frequency stark-up, automatic block circuit, automatic detection circuit of one to two lighting on mode and light automatic regulation circuit.

The invention discloses laser energy supply communication equipment and a communication method and a power supply method thereof. The laser energy supply communication equipment comprises a laser, anoptical fiber communication low potential module, an energy management unit and an optical fiber communication high potential module, wherein the laser and the optical fiber communication low potential module are arranged at the low potential node; the energy management unit and the optical fiber communication high potential module are arranged at a high potential node; the laser is connected withthe optical fiber communication low potential module; the energy management unit and the optical fiber communication high potential module are connected; the laser and the energy management unit areconnected through a big-core-diameter optical fiber; the optical fiber communication low potential module and the optical fiber communication high potential module are connected through a communication optical fiber. The electricity can be effectively supplied to the high-potential monitoring node; the self power consumption of the high potential node can be reduced; the electric energy capable ofbeing used for outputting the peripheral equipment is increased, so that the laser maintains the low-power consumption output state; the service life of the laser is prolonged; the reliability of theenergy supply communication equipment is improved.

The invention discloses a self-powered CMOS piezoelectric vibration energy harvester. The self-powered CMOS piezoelectric vibration energy harvester is characterized in that the self-powered CMOS piezoelectric vibration energy harvester includes a CMOS piezoelectric synchronous charge extraction and collection interface circuit and a follow current energy storage circuit; the CMOS piezoelectric synchronous charge extraction and collection interface circuit is encapsulated in the form of an integrated circuit form; the CMOS piezoelectric synchronous charge extraction and collection interface circuit is provided with a first detection circuit output control interface, a second detection circuit output control interface, a first piezoelectric element connection interface, a second piezoelectric element connection interface, a first capacitance detection interface, a second capacitance detection interface, an external-connection inductance interface and a grounding port; the CMOS piezoelectric synchronous charge extraction and collection interface circuit includes a positive extremum detection module, a negative extremum detection module, a positive and negative extremum interlock switch, a positive and negative direction vibration automatic switching switch and a dynamic substrate level selection module. The self-powered CMOS piezoelectric vibration energy harvester has the advantages of easiness in integration, small circuit size, low power consumption and high energy extraction efficiency; and a self-powered design is adopted, so that the self-powered CMOS piezoelectric vibration energy harvester further has the advantage of no need for an external power source.

The invention discloses an overhead line high-altitude operation anti-falling intelligent alarm system. By means of manners and approaches of developing a special portable remote terminal unit (RTU) to monitor the using states of a safety belt, a safety helmet and a falling protector and integrating the wireless data transmission technology, the cloud server technology, the switch-based database technology, webpage programs and mobile phone terminal application programs, the states of safety protection measures of an operator working high above the ground in site are sent to a control center database and a mobile phone terminal of site safety management personnel, so that the problems of alarm signal generation, mobile phone terminal display prompting and archiving and classifying of databases are solved.

The invention relates to a vehicle vibration power generation device with a USB interface. The device adopts a heavy hammer and a double-acting type ratchet wheel as a vibration pickup mechanism, a gear set is a vibration mechanical energy transmission mechanism, a direct current permanent magnet generator is an electromechanical energy conversion mechanism, and an electric energy processing circuit with a USB interface processes irregular direct current electric energy, and supplies power to a vehicle-mounted electronic device. The vehicle vibration power generation device uses the double-acting type ratchet wheel mechanism for vibration pickup, converts rectilinear motion in vehicle running to rotational motion, and drives the low damping permanent magnet direct current generator to work through the efficient gear mechanism, and compared with a common linear type vibration power generation device, the transmission and conversion efficiency of vibration mechanical energy can be significantly improved. The vehicle vibration power generation device with the USB interface generates power by renewable energy, the vibration pickup efficiency, and the energy transmission and conversion efficiency are high, the working life is long, the USB interface is adopted to be suitable for the use of most vehicle-mounted electronic devices, and the universality is strong.

The invention discloses a Pulse-Width Modulation (PWM) or Pulse-slope Modulation (PSM) dual-mode modulation control circuit used for a switch voltage-stabilized supply, and belongs to the technical field of electronics. The PWM or PSM dual-mode modulation control circuit comprises a controllable current reference source Iref, a comparator, a switching control circuit Load_SM, wherein the controllable current reference resource Iref generates two reference voltage signals, namely vref0 and vref1, under the control of a pair of control signals D0 and D1, which have opposite phase positions; the comparator realizes the comparison output of the voltage SM of a drain terminal of a main switch tube and the reference voltage; and the switching control circuit Load_SM automatically switches the PWM or PSM modulation mode and updates the control signals D0 and D1. The PWM or PSM dual-mode modulation control circuit selects the PWM or PSM modulation mode according to the condition of load weight so as to ensure high efficiency in a whole load range of a system. In the PWM or PSM dual-mode modulation control circuit, the load condition is judged by directly converting a current into a voltage and comparing the voltage with the reference voltage without sampling the current on a power switch tube by using a current sampling circuit. Most of the PWM or PSM dual-mode modulation control circuit is a logical circuit, has low power consumption, occupies small chip area, and can remarkably improve the efficiency of the system.

The invention provides a high-power switching circuit comprising an input power source (100), a multivibrator (101), a voltage doubling circuit (102), a switch control circuit (103), and a power switch (104). The input power source (100) consists of a first input power source and a second input power source; the first input power source provides a first input voltage and the second input power source provides a second input voltage; and the first input voltage value and the second input voltage value are not equal. The multivibrator (101) outputs a square wave to the voltage doubling circuit (102), wherein the amplitude of the square wave is equal to the voltage value of the first input voltage. The voltage doubling circuit (102) outputs a voltage-doubling voltage to the switch control circuit (103) under the effect of the square wave and the first input voltage, wherein the voltage value is one doubling the first input voltage value. After turning off a switch K1, the switch control circuit (103) outputs the voltage-doubling voltage to the power switch (104). The power switch (104) outputs a first operating voltage and a second operating voltage under the effect of the first input voltage and the second input voltage.