• 31Aug

    Charging

    Portable electronic applications by the battery-powered and non-line-powered system had increased the complexity of the power subsystem. For example, depletion of a power lithium-ion rechargeable laptop battery is not a simple process. The use of a false charge curve will shorten the effective battery life.

    In addition, a complete course of lithium-ion batteries from three distinct stages. In the first stage of charge or pre-charging, the battery after a short time to get pre-charge. The second stage is characterized by constant current, the stage after about a whole Rechargeable cycle of 20% to 30% after a relatively short period of time. The constant current rechargeable batteries can stage to its full capacity of about 70 percent to 80 percent. The final stage of charging for a constant voltage characteristics. This is the stage of the three charging the slowest stage of the time required to complete the whole process time charge of 70 percent to 80 percent. Constant voltage toshiba laptop battery charging stage of completion of the final storage capacity 20 percent to 30 percent. For the lithium-ion rechargeable battery monitoring the process of power components must be able to manage all of these stages, to maximize battery charging effects, and to ensure that the best battery life.

    According to the requirements of portable devices, there are several different types of battery charging equipment. In those cost control is more important than efficiency in the application of the linear charger provides a superior solution. However, despite switching charger more expensive than the linear charger Satellite A75 , but their effectiveness could at least 90 percent.

    In addition to charging process itself, the power subsystem must also address other issues related to the battery. For example, some portable systems with alternative power supply (for example: can be used for battery-powered USB ports, etc.). Portable media player may be passed to a wall socket to connect to the general approach to charging, or, as the other option, the device can also be connected to another USB port equipment (such as: laptops Computers) to the USB port to recharge Satellite A70 battery .

    Power-channel management is a unique feature, allowing for portable battery charging system in the normal course of work. Power systems must have sufficient degree of complexity to the power used to run the system at the same time charging the battery. Other features may include some batteries may short-circuit caused by the over-voltage or over-current protection. If these abnormal factors were ignored, then they will destroy systems or batteries, the system may have caused damage and battery. At the same time, also called for battery authentication, in order to avoid the portable system installed in substandard or accessories market from the low-quality batteries. So through the installation of a package of identity authentication chip, the system will be able to guarantee high-quality PA3384U-1BRS battery  used for the operating system to provide electricity.

  • 31Aug

    Accurately report lithium batteries and nickel consumption of power management products

    Microchip Technology (micro-core technology companies in the United States) to further expand its lineup of battery management products, today announced the launch of the integration of field-programmable power, applicable to 2-4 lithium-ion and lithium polymer batteries, or 6-12 Of nickel-hydrogen batteries and nickel-cadmium battery applications. New devices with smart laptop battery system (Smart Battery System, called SBS), can accurately judge the battery power and provide battery monitoring function, improve the application of security, with the end-of-discharge (End of Discharge, called EOD) control, then extended Battery life and working hours.

    PS501 battery management IC products used Microchip high-performance, low-power PIC18 microcontroller core, its 16 kilobytes of memory-chip memory in the Accuron ® patented algorithm.

    The battery management devices of current low, only 150 microamps. When the suspension of work related applications, the device will automatically enter the low-power sleep mode, power consumption less than 1 microamp, both energy conservation and reduce excessive toshiba laptop battery discharge.

    The new device also integrates a 16 programmable Sigma-Delta ADC, as well as to optimize the professional application of mixed-signal circuits. As a result, the device can not only accurate measurement of battery current, temperature and voltage, but also directly connected to as many as four series lithium-ion or lithium-polymer battery pack. EEPROM device can be stored on the user and set up the system by “learning”, was the Satellite A75  parameters. The device also has a precise silicon oscillator, no longer need an external crystal. The new device hardware and advanced algorithms will be combined balance of the battery, the device could well be applied to lithium-polymer battery applications.

    The new device has 12-pin universal, support charge and safety control or user programmable digital I / O. The eight-pin can only be used for light-emitting diode driver, while another two to make a direct FET (FET) drive the open-drain. The device can be industry-standard SMbus protocol with the host, and to support all Sbdata parameters.

    Microchip for the PS501 Satellite A70 battery  management products provide a wide range of system development. One for lithium-ion or lithium-polymer battery, Microchip launched a series for four batteries of the PS5164EV, three batteries of the series and two series PS5163EV battery PS5162EV; for nickel-hydrogen batteries and nickel-cadmium batteries, used to launch 6-12 series battery PS5100EV. These systems include the development of an application board, PowerInfoTM 2 interface board (PS051) and fringe of the cable, and documentation. In addition, the support of Microsoft Windows ® PowerToolTM 2 (PS050) software built-in wizard procedures to facilitate the assessment of engineers in the development of systems and application-specific parameters and PA3384U-1BRS battery  optimization, and provide PS501 applications such as custom programming and board and other adjustments Production support.

  • 29Aug

    Cell phone chargers to the market

    1. At present, mobile phone chargers can be divided into single slot shape and Dual Chamber of chargers, chargers are being single-channel two-channel attacks. Two-channel charger in addition to slow charge, fast charge, discharge and nickel-cadmium, nickel-hydrogen laptop battery and charge a standard feature, there are some products with automatic temperature control and voltage control, to prevent the filling of new features, thus consumption Who should be inclined to choose Dual Chamber of chargers.

         2. With the increasing variety of mobile phones, various models for different chargers, power is not the size of the same port, which can not be used interchangeably, has brought inconvenience to consumers. Standard charger is that you can connect all the phone at the bottom outlet (port) of the charger pavilion battery. Moreover, the production of mobile power for the port will apply to the unified standard charger specifications. In this way, consumers will not have to phone each other at the same time to buy a new charger. Thus, from the sit-in charger to the portable, such as the development of Dual Chamber at the same time, also began to standardize the general direction of development.

         3. Standby power consumption of mobile phone chargers to reduce gradually become the Chargers in the design process an important part. Compared to the previous chargers, the future production of the products will improve the function at the same time further reducing its own standby power consumption F2024A . In order to achieve this objective, can design a judgement whether the AC adapter connected load (phone) IC, when not connected load, the AC adapter DC output side (two circuits) switch to high-impedance circuits. This measure can be adopted to substantially reduce standby consumption of two circuit current (can reach tens of μ A). In addition, the exchange can also enter the 100 V (a circuit) circuit in the switch settings. Not connected load, through the switch circuit to reduce supply to the DC output side (two circuits), thereby reducing power consumption.

         4. Now on the market most of the charger, only lithium batteries or nickel-hydrogen batteries, but with the development of the market, automatic identification of two F2024B  charging and the corresponding process of the charger is gradually occupy the mainstream. Can automatically distinguish between lithium batteries or nickel-hydrogen battery Zuochong can “to prevent the discharge of lithium wrong moves” if the rechargeable lithium battery when not carefully Zuochong according to the “release button,” can identify good Zuochong is out Lithium batteries, it will not do discharge movements of the poor while不管三七二十一Zuochong conduct discharge, which will result in the impairment of lithium F2299A life.

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