Increasingly diverse input power

With the increasing diversity of people’s living environment can be used for battery charging power supplies are becoming increasingly diverse, in addition to other traditional 220VAC adapter, users can also hopes to keep power through the USB interface or a vehicle for various devices such as battery charging, In addition, there are user requirements in the device while charging can continue to use its features, so the device need to be more flexible charge management circuitry to accommodate a wider range of application environments.(Click here to buy Lenovo ThinkPad i1100 battery .)

Clearly, the new requirements to the system manufacturers greater challenge. “The challenge comes from the first charge-management IC require a wider operating voltage range, thus requiring the use of higher voltage semiconductor process to carry out the chip design.” Wang Yun said, “The second challenge is to ask the IC can be on different input power to make corresponding adjustments, as well as battery charging and system power consumption can make a certain amount of management. “Fujitsu MB39A132/134 his charge management IC for example, explains, through the distribution of the dynamic input current to ensure that the system power consumption and battery charging can simultaneously hold.(Click here to buy IBM Thinkpad Z60m battery .)

As the AC adapter / USB / Car power supply provided by the voltage and current are not the same, while the rechargeable battery voltage and sessions are not quite the same, when the charging voltage is higher than the supply voltage can be carried out through step-up charge, so that rise and fall Pressure charge management IC on the market have not seen. (Click here to buy IBM Thinkpad X61 battery .)

In addition, the equipment working at the same time charge, demand charge management IC have a good anti-jamming design, keeping in mind that in the case of low battery voltage, charge current is greater than the discharge current to ensure that, to avoid “make ends meet,” to happen. “From the charging IC design point of view, the current challenges include: (Click here to buy IBM Thinkpad X60 battery .)

1, how to further improve the conversion efficiency and lower standby charging power;
2, how to effectively manage multi-channel power supply and load;
3, how to improve the charging rate at the same time to ensure the safety of battery life; 4, how to further expand charging control method of flexible configuration in order to adapt to different types of battery charging requirements. “Xin Wu added.(Click here to buy IBM Thinkpad W500 battery .)

BCD Semiconductor is an analog signal integrated circuits in the Greater China manufacturers (IDM), engaged in power management IC product design R & D and manufacturing. Unlike the rest of the market Fabless design firms, BCD Semiconductor has a 6-inch wafer fabs.(Click here to buy Lenovo ThinkPad i1250 battery .)

(Including Bipolar, CMOS, BiCMOS, and BCDMOS production process), can take advantage of product design and integration of advanced technology to optimize product performance and cost in order to provide a cost-effective application solutions.(Click here to buy Lenovo ThinkPad i1241 battery .)

In fact BCD Semiconductor’s focus is on low-cost, high efficiency AC / DC off-line power adapter / charger controller chip, the company in 2006 developed the first generation of primary-side controller AP370x series is the first launch of its kind on the market one of the products. (Click here to buy Lenovo ThinkPad i1230 battery .)

According to reports, AP370x using the original edge control and output cable compensation proprietary technology, built-in temperature compensation and transformer primary side inductance compensation, you can save optocoupler and secondary case of feedback control circuit to achieve high-accuracy output voltage and current control , thereby greatly reducing the number of power circuit components and simplify circuit design has been successfully used in mobile phones, wireless public telephone, cordless phones and wireless routers and other products charger / adapter. “(Click here to buy Lenovo ThinkPad i1210 battery .)

In order to further improve the power conversion efficiency, reduce standby power consumption, we have further introduced the industry-leading five-star standards to meet the second generation of the primary side controller AP376x series, its no-load power consumption less than 30mW can easily meet the energy of the Star EPSv2.0 and five-star standard mobile phone charger all of the world, including the charger / adapter, and no-load energy efficiency standards. “Xin Wu said.(Click here to buy Lenovo ThinkPad i1200 battery .)

According to Wang Yun introduced Fujitsu’s charge management products are mainly targeted at the 2Cell above market, and 2 ~ 4Cell applications have to be among the biggest market in notebook computers. From 15 years ago, Fujitsu power management R & D team and Fujitsu notebook R & D departments, began developing the charge management for laptops IC. (Click here to buy Lenovo ThinkPad i1300 battery .)

Through several generations of continuous development and improvement of products, new research and development of the lithium battery charge management ICMB39A132 and MB39A134 in Taiwan and mainland China makers are applied in many other places, but also by the recent high-profile Internet access to this market’s attention. “In the notebook computer applications which, due to a few years ago rechargeable battery explosions happened one after another so that all notebook manufacturers charging part of the design of the design of increasingly importance in the management of part of the charge would prefer to use a high quality, stability and reliability of the big brand power management IC. “he said.(Click here to buy Lenovo ThinkPad i130 battery .)

However, BCD Semiconductor Corporation from AC / DC Products Dr. Wu Xin, director of MCU + PWM is more optimistic about the program, he considered that the formation of special charge management IC circuit control scheme is simple, but relatively simple function, usually only on the specific parameters of the lithium-ion battery conduct charge, and different models of portable products are often using a different model specifications of lithium-ion batteries, if we adopt special chip, it will result in duplication of development efforts and waste of resources.(Click here to buy Lenovo ThinkPad i1271 battery .)

“Using MCU + PWM to achieve Buck circuit and control method of low-cost flexible and can easily be improved and upgraded, can be applied to a variety of lithium-ion batteries.” Xin Wu said.(Click here to buy Lenovo ThinkPad i1260 battery .)

Portable electronic products in the past mainly uses disposable batteries or alkaline batteries as a power supply is different now, whether laptop, mobile phone or MP3/MP4 player, have all the basic use of lithium ion, nickel-cadmium or nickel-hydrogen rechargeable batteries, not only reduces the use of Cost is conducive to environmental protection, and more importantly, a larger battery capacity can be done in order to obtain longer battery life. (Click here to buy Lenovo ThinkPad i1391 battery .)

Rechargeable batteries because of their characteristics to the system developers have also made new demands, in order to make rechargeable batteries have a longer life, the correct charging circuit design and device selection is essential, whether it is an external charger, or system Internal rechargeable power management program is required depending on the use of careful consideration.(Click here to buy Lenovo ThinkPad i1370 battery .)

Single-chip charge management programs or will become a mainstream

ThinkPad R400 (2784A54) Notebook, as a business model, using Intel Core 2 Duo T6670 processor, dual graphics cards to switch. R400 is the closest appearance and T400 models, we have learned in the market, this notebook is being promotional price of 5899 yuan.(Click here to buy Lenovo ThinkPad X300 battery .)

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