Smart Battery Charger

January 14, 2009, power management IC developer of Advanced Analogic Technologies Co., Ltd. (AnalogicTech?, Nasdaq Stock Market Code: AATI), today adapter for laptopannounced the launch of a product number for the AAT3691 been built up to 28V Pressure protection, dual-input battery charger chip. To meet the industry's multi-power battery charging high flexibility and reliability requirements of the design, which supports the new battery charger, Fujitsu Laptop Battery such as mobile phones, digital cameras and other handheld device applications alternating current (AC) adapter and USB interface, two kinds of input. The charger right kind of input source to provide the shortest charging time for intelligent assessment, and to amend charging path, while the built-in overvoltage protection (OVP) to avoid errors in the battery and system input.

"Today's portable system designers need a battery charging solution that not only support from the AC adapter and USB interface, two kinds of input, while also protecting battery, charger and the system." AnalogicTech product line director, said SiamakBastani . "AAT3691 delivers up to 28V input for the two kinds of built-in overvoltage protection, helping designers to achieve maximum flexibility and stability of the charge,Fujitsu Laptop Battery Fujitsu FPCBP80 Battery, Fujitsu FPCBP77 Battery, Fujitsu FPCBP68 Battery, Fujitsu FPCBP63 Battery, while reducing component count and finished footprint."
Fast Overvoltage Protection Response
AAT3691 is designed to regulate battery charge voltage and current are designed for a variety of portable systems widely used in 4.2V lithium-ion battery. As a built-in battery charger chip, a combination of a power device, a reverse current blocking and current-sensing,Fujitsu FPCBP80 Battery, so the device is designed for AC adapter input and USB port to run an input voltage range is 3.0VDell XPS M1210 battery to 6.75V (typical values ).
In order to maximize safety, AAT3691 an increase of built-in overvoltage protection up to 28V. OVP block can provide the following ultra-fast response 1μs.

Charge through a wall adapter charge current can be programmed to 1.6A, while the external resistance through the use of a USB interface charge current up to 0.5A. When the adapter or the USB input power than the typical value of 6.75V, an internal switch group series will be opened in order to prevent damage to the battery or charging circuit. AAT3691 charge and over-voltage protection of the total resistance (RDS (ON)) value is very low, the largest of only 600m?. Auto-recharge option circuit according to input voltage and other criteria to identify the best charging source, as well as by adjusting the charging path to achieve the shortest charging time.

AAT3691 also features a now-free batteries (NOBAT) input detection function, prevent the adoption of over-voltage protection unit input power, Fujitsu FPCBP77 Battery in the absence of battery sDell XPS M140 batterytatus, battery or connector defective track the case of cancellation charge.

This new charging chip also offers a range of other protection, is used to protect the charging device, control system and batteries. The battery charge state has been constantly testing to detect fault conditions, safety features include thermal shutdown protection, power-on reset and soft-start.
Second paragraph of Charge Chip

Based on the AAT3691, AnalogicTech also introduced a slightly modified version,Fujitsu Laptop Battery Fujitsu FPCBP80 Battery, Fujitsu FPCBP77 Battery, Fujitsu FPCBP68 Battery, Fujitsu FPCBP63 Battery, in addition to providing all of the above features, also added a built-in low dropout linear regulator (LDO), which will be the second quarter of 2009 supply. In the charge cycle, the LDO can be used as cell phone or other portable device on a transceiver,Fujitsu FPCBP63 Battery the House microcontroller, thereby contributing to minimize current consumption of the system and shorten the charging time.