Industry's first battery charger with automatic USB enumeration

22nd September 2010
ES Admin
Maxim introduced the MAX8895, a linear battery charger for Bluetooth(R) headsets and portable devices that is compatible with the USB Battery Charging Specification, Revision 1.1. The MAX8895 is uniquely equipped with automatic adapter detection for distinguishing between USB devices, USB chargers, and dedicated chargers. It also integrates a USB enumeration function that automatically negotiates with the USB host to optimize charging current without processor intervention. This capability eliminates the need for a separate microcontroller and system software, thus providing the industry's only stand-alone charging solution.
Smart Power Selector(TM) functionality provides seamless distribution of power from the USB power input (Vbus) to the battery and system load. This allows simultaneous charging of the battery while powering the system, as well as operation of the portable device with a discharged battery or no battery. The battery also supplements Vbus when the system load exceeds the Vbus input current limit.

The MAX8895 integrates a battery-disconnect switch, current-sense circuit, thermal-regulation circuitry, MOSFET pass elements, and overvoltage protection (OVP) up to 16V, providing an easy-to-implement, extremely compact charger solution. Flexible programming options include fast-charge current, termination current, and charge timer duration. The MAX8895 also supports adaptive battery charging, which reduces charge current when necessary to prevent the charge source from collapsing. Other features include a charge-status flag, charge-fault flag, power-OK monitor, battery thermistor monitor, timer for safe charging, and undervoltage lockout (UVLO).

The MAX8895 is offered with two USB options, the MAX8895X (low speed) and the MAX8895Y (full speed), both of which operate from a 4.0V to 6.6V supply. Available in a tiny, 2.5mm x 2.5mm, 25-bump WLP (0.4mm pitch), the MAX8895 is fully specified over the -40 degrees Celsius to +85 degrees Celsius extended temperature range. Prices start at $1.50 (2500-up, FOB USA). Samples and evaluation kits are available upon request.

Maxim Integrated Products is a publicly traded company that designs, manufactures, and sells high-performance semiconductor products. The Company was founded over 25 years ago with the mission to deliver innovative analog and mixed-signal engineering solutions that add value to its customers' products. To date, it has developed over 6400 products serving the industrial, communications, consumer, and computing markets.

Maxim reported revenue of approximately $2.0 billion for fiscal 2010. A Fortune 1000 company, Maxim is included in the Nasdaq 100, the Russell 1000, and the MSCI USA indices. For more information, go to www.maxim-ic.com

Bluetooth is a registered trademark of Bluetooth SIG.
Smart Power Selector is a trademark of Maxim Integrated Products, Inc.

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