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Self charging devices
Self charging devices With time technology has become more advanced and popular with devices with larger screens and resolution, thinner looks, also extended battery life and more available options to do everything on the smart phone on the go. Lots of companies are coming up with ways in how to extend the phone battery life when a person is out and about and away from a power outlet eg self…
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Dallas puts out and totally customizes the algorithmic coulometer
Dallas Semiconductor puts out DS2792 programmable coulometer, is suitable for 1 or 2 battery application. DS2792 integrated MAXQ® The microcontroller, high-capacity procedure and data storage, rigorous battery circuit, measuring system of the voltage and temperature. This line of characteristics allow to flexibly in the battery-driven products customize the computing method of electric quantity.
The calculation core of DS2792 is 16 MAXQ20 microcontrollers of low power consumption, it adopts advanced 16 RISC frameworks based on accumulator. Because the order of DS2792 includes operating code and data at the same time, the processor can be by finishing fetching instruction and carrying out and operating within one clock cycle high-efficiently, do not need assembly line mechanism. The processor kernel supports the heap of 16 grades of hardwares, can finish subprogram call and task switch fast. Can pass the fast processing data effectively of three restricted data indicators, many data indicators allow more than one functions to visit the data storage, do not need to keep and resume the indicator of the data each time.
In order to allow users to work out the exclusive algorithm, DS2792 includes the memorizer of three kinds of types: Programm store, data EEPROM and data RAM. The memorizer adopts the structure of Harvard, procedure and data storage have independent address space. 8kB programm store includes 4kB receives the password protective EEPROM and 4kB ROM. Among them EEPROM allows the device to be programmed again, thus reducible development and on-the-spot staging, and then lower costs. The data EEPR OM are 64 byteses, can be used for keeping the important data, such as charge parameter, battery characteristic parameters, manufacturer's data,etc., the data are not influenced by battery overdischarge, shorting out in surprise or ESD incident. The data RAM are 256 byteses, it can be used for the phasing out of data.
DS2792 offers the rigorous electric current, adds up to electric current, voltage and thermometry. The totalizing within the chip of measured value of the electric current, in order to produce the adding up to value of electric current, the precision is less than 0.5% of the scale span range, the error within the range of ± 64mV is ± 4.0& micro; V. Act as and use the 15m&-#; 8486; At the time of the sense resistor, electric current survey accuracy is 0.5% of the scale span, the error is ± 267& micro in 4.2A range; A. The voltage measured value of DS2792 is 10, the range is 0 to 4.99V, the definition is 4.88mV. Temperature sensor is used for measuring the battery temperature on slice, the measuring result is 10, the definition is 0.125 degrees of C. The host computer can visit all measured datas and receive the password protective programmable EEPROM through UART interface of DS2792.
