1 Introduction
In recent years, the rapid development of portable electronic products for a replacement battery technology. Lithium-ion batteries because of its high energy density, long life, low self-discharge rate, no pollution and other features, quickly becoming the market mainstream battery products. Appeared to prevent the battery charge or over discharge state to ensure the battery’s safety performance and to avoid deterioration of battery characteristics, must be installed in lithium-ion battery protection circuit. Inspiron 1300 Inspiron 1420 While lithium battery can provide reliable power for the device, for detection and monitoring of smart batteries that must be considered link. Lithium battery-powered portable devices in modern power supply the most appropriate solution, but the charge and discharge is less secure than nickel-cadmium batteries, nickel metal hydride batteries and the traditional power of ordinary disposable batteries. If the charge and discharge the right way, will lead to lithium battery safety problems occur, or even an explosion, it is necessary to add lithium battery monitoring circuit to real-time monitoring charge and discharge process. Taking Actions to design lithium battery SOC chip ATJ2085 external detection system, the design of programs to control various functions of the microprocessor as the core, in addition to lithium-ion battery pack provides over charge, over discharge, over-current protection, the Can also be effective on the lithium-ion battery pack lithium within the single charge and discharge protection to provide a balanced, real-time detection of lithium battery in which the state and protect Inspiron 1501 Inspiron 1545 Inspiron 1520 .
2, ATJ2085 the use of the battery monitoring function
ATJ2085 for the LQFP package, 64 pins, the use of M-embedded
CU and 24-bit DSP dual-processor architecture, the respective events for the control and operation of multimedia data encoding / decoding system-level optimization, through the digital-analog mixed-signal technology, in a single silicon integrated high-precision ADC / DAC converter , USB controllers, real-time clock RTC and so on. Support USB2.0 (FULLSPEED), media player and other formats supported MP3/WMA/WAV/WMV/ASF; Support MTV movie player; supports JPG, GIF, BMP picture browsing. The system is highly integrated, the external application circuit is simple, has a fully functional and mature development tools and environments Inspiron 1564 Inspiron 1720 .