Car dogs system: At any time and place, all accuse in the palm in

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Car dogs the system suits to monitor very much a car or whole motorcade. Dog system by dog automatically hardware and use at collecting data (if need, still data is transmitted) software composition. 2015, global motorcade manages the dimensions of the market to be 8 billion dollar, predict to will exceed 22 billion dollar 2022, arrive from 2016 2023, year compound increase rate will exceed origin of 20% (data: Global Market Insights) . Latin America, middle east and Africa are right commercial vehicle demand is rising, this dogs to car also is a kind of potential growth opportunity the system. Wait in Europe, North America develop area, net of predicting content couplet (the compositive meeting of IoT) technology and car makes car dog the system is used of rate rise, although compositive high cost slow down this one process. In addition, car of predicting contemporaneity Asia dogs the dimensions of the market will grow significantly, japan, India and China are the state that has main drive effect. These rising markets potential is tremendous, because,basically be commercial vehicle numerous. Contemporaneity, in Latin America, middle east and Africa, because different country car uses the rise of rate, car dogs the market predicts to also can have moderate growth (data origin: Global Market Insights) . Active tracker and passive tracker collect active tracker and passive tracker the way of data is same, as much accurate. The main distinction of this two sort tracker depends on time. Active tracker also is called " real time " tracker, because they pass satellite or beehive network to transmit data, indicate car position immediately. Computer screen can indicate the shift of car in real time. Accordingly, if the enterprise hopes to rise to carry efficiency and understand personnel spot,drive circumstance, dogging so actively is optimal choice. Active tracker still has a kind " geographical crawl " ability (it is imagination of this kind of function similar " field of force " ) , its can enter in the car or leave a certain caution signal provides when booking the position (news source: RMT company) . Additional, this kind of system still can be helped prevent car suffer loss by theft or recover by steel car. Of course, active GPS dogs equipment dogs than passivity equipment is costly, and need pays a service fee by the month. On the other hand, passive tracker value is inferior, but data stores the quantity suffers be restricted, they are smaller nevertheless, more conceal easily. Passive tracker stores on equipment information, is not to long-range place transmits data. This kind of tracker must be taken from car, go up to computer repeatedly, ability examines the information that stores among them. This kind of system suits to stem from working purpose to dog the person of course of development, also suit to hope to reduce the enterprise that car abuses. Additional, the act that passive tracker often also uses censorial personnel (can imagine detective job) . If do not need immediateness feedback, examine equipment data regularly however, so passive tracker is a very good choice. No matter the tracker of which kind of types, it is portable substantially, over all dimension is relatively lesser. Because this needs batteries power supply, also need backup function in order to be in in case data is saved when cutting off the power. Because give batteries (it is batteries of ion of only part lithium normally) charge the car system voltage with taller need and bigger electric current, so switch mode charger is desirable, because charge with linear batteries,IC photograph is compared, charge efficiency of switch mode charger is taller, the quantity of heat that produces with power comsumption form is less. Substantially, embedded the input voltage of car application may be as high as 30V, some are taller even. Dog in these GPS in location system, a charger and common 12V come batteries of ion of only part lithium (typical cost is 3.

7V) , in the light of get much input tension high (sending source of student the voltage transient circumstance at batteries drift) additional protection, and some sort the configuration that backup ability will be ideal. Batteries charges the designs problem tradition linear develop of IC attacks batteries charger often is occupied compactly because of its board the cost of area, simple sex and moderate and be taken seriously. Nevertheless, traditional and linear charger has a few drawback, include input and batteries voltage limits to suffer be restricted, electric current is used up pass relative to bigger, power comsumption big (generation quantity of heat) , charge stop algorithm to suffer be restricted and efficiency is relatively inferior. On the other hand, charger of switch mode batteries is very popular choice, because of this kind charger has develop to attack flexibility, the batteries that can comprise to a variety of chemistry charges, charge efficiency is tall, because this utmost reduced quantity of heat, can come true to charge quickly, still have very wide working voltage range additionally. Of course, balance always is existence. The defect of switch charger includes: Cost produces noise and solution more complexly, possibly to occupy relative to the taller, design that is based on inductor board the area is larger. As a result of the advantage of the switch charger that above alludes, contemporary lead acerbity batteries, wireless power source, energy is collected, solar energy charges, long-range sensor and embedded car application uses power supply of switch mode charger mostly. On the tradition, the backup power source that batteries faces in tracker manages a system to be comprised by many IC, include step-down of a high pressure manostat and charger of a batteries, still have schism type package somewhat, this is a kind of compact solution anything but. Accordingly, inchoate dog systematic over all dimension is not very compact. Dog typically to batteries of systematic application use car and support of batteries of ion of only part lithium store and back up. So, why to dog is systematic need compositive spend solution of taller power source government? Above all, need the dimension; that reduces tracker oneself is in this market, dimension is Yue Xiaoyue good. In addition, still ask to make charge safely and is IC to offer be aimed at voltage transient to batteries the case that protection, need has systematic backup ability to power source disappears or malfunction in order to answer a system, and be general in group wireless business (the voltage of power source course with GPRS) chip relatively inferior set (.

45V) power supply. Power source backup manages implement before one satisfies, narrate requirement, compositive power source backup manages implement need to have the following characteristic with the solution of charger: Synchronous step-down develop attacks in order to come true efficient very wide input voltage range, in order to suit all sorts of input power source, offer the batteries with proper protection to charge in the light of high-pressured transient state even voltage is passed with supporting GPRS chip group inside buy charges stop (need not microprocessor) handy with own land moving PowerPath is controlled -- when producing power source breakdown, between input power source and backup power source implementation is not had seam switch. If produce input short circuit, this control function still needs to offer retrorse segregation to offer backup batteries, because the space is restricted,be systematic load power supply when the input disappears or giving trouble, need is offerred occupy board very small compressed solution encloses the area advancedly to heat up function and dimensional utilization rate in order to improve to satisfy these specific requirement, ADI company rolled out LTC4091 recently, this is a complete lithium ion batteries backup runs a system, suit to be in advocate power source must maintain for long when breakdown 3 what move.

45V comes 4.

Course of 45V power source. LTC4091 uses sheet of a 36V piece step-down converter, get used to output control oneself, with giving a system laden power supply from step-down converter output, support efficient batteries charges. When exterior power source is usable, this parts of an apparatus can be offerred be as high as 2.

The total output electric current of 5A, can be only part 4.

1V or 4.

Batteries of 2V lithium ion is offerred be as high as 1.

The charging current of 5A. If advocate input source gives trouble, cannot give laden power supply again, LTC4091 passes an in-house and ideal diode, from backup lithium ion batteries outputs load to provide the electricity that is as high as 4A to the system, if use transistor of an exterior and ideal diode, can provide relatively unlimited electricity. To protect sensitive downstream load, voltage limitation is load of the biggest output 4.

45V. When power source gives trouble, the PowerPath control of this parts of an apparatus is being inputted offer between power source and backup power source without seam switch, through short circuit the input supports retrorse segregation. The representative application of LTC4091 includes motorcade and belongings to dog, appearance of car GPS data logging and teleprocessing system, how to defend a system, and communication and industrial backup system. LTC4091 offers 60V absolutely the biggest input presses protection too, accordingly this IC can resist very tall input voltage transient state. The batteries charger of LTC4091 offers two ion that it is lithium to batteries backup applies and optimize, bring a foot to charge optionally voltage: Standard 4.

2V voltage, and but balance batteries run time and charge / 4 of discharge cycle life.

1V optional voltage. Other characteristic includes to be in what start and output electric current controls when overload is soft start and frequency is folded return and tiny stream stream charge, charge automatically, small cell n charges beforehand, charge timer is stopped, the thermistor that adjustment of quantity of heat uses at temperature qualification to charge with cites a base. LTC4091 is used compressed (0.

75mm) 22 brings crural 3mm X 6mm DFN to enclose, offer rear metal solder dish in order to achieve outstanding hot performance. This parts of an apparatus is in 40 ° C runs – inside the temperature limits to 125 ° C. Graph the 1 representative application principle that showed this parts of an apparatus pursues. Graph 1: The quantity of heat of graph of representative application principle of LTC4091 adjusts protection to prevent quantity of heat exorbitant attaint this IC or all round package, if chip temperature rises to C of about 105 ° , road of annulus of feedback of in-house quantity of heat reduces the charging current of set automatically. Because high-power moves,adjustment of quantity of heat prevents or environmental temperature brings about LTC4091 overheat too high, make the user can break through the power that gives circuit board design to handle the limit of ability, and the risk that won't face attaint LTC4091 or exterior component. The advantage of road of annulus of adjustment of quantity of heat is, charging current is OK according to actual condition is not set of the poorest condition, ensure charger meets batteries reduce electric current automatically below the poorest condition at the same time. Pass through to drop what car cold vehicle starts circumstance car application to be able to experience power source voltage considerably, start a circumstance to fall in cold car for example, power source voltage drops to bring about high-pressured switch manostat possibly to lose tone considerably energy-saving force, had caused big VC tension, had brought about big output to rush too when VIN restores accordingly. When restoring to prevent to launch a case from cold car, had appeared to rush, be necessary to bring a foot to make through RUN/SS the restoration of the soft circuit that start of LTC4091. The following graph 2 show the example that gave a simple circuit, this circuit can detect automatically owe control a state and make RUN/SS stretchs crural restoration, receive the soft function that start afresh circuit and prevent to happen have ruinous output to rush too. Graph 2: Cold car is started pass through circuit conclusion car and motorcade dog systematic adoption is led rising. The over all dimension of contemporary tracker is in reduce, the function is increasing, include active data to transmit a function, dog in order to back real time. In addition, still need the inferior voltage of power supply of backup function and set of chip of the GPRS in using a system. The LTC4091 of product of Power By Linear of ADI is charger of step-down of a high pressure, big electric current batteries and PowerPath backup management implement, provide adjustment of quantity of heat and extensive protection, dog for car application offerred compact, powerful with quick odd chip solution, make the task of stylist simpler, easier. CNC Milling