Date: 17/09/2010

Linear battery charger from Maxim with automatic USB enumeration

Maxim has released the MAX8895, a linear battery charger for Bluetooth headsets and portable devices and is compatible with the USB Battery Charging Specification, Revision 1.1. This device is equiped with automatic adapter detection for distinguishing between USB devices, USB chargers, and dedicated chargers. The MAX8895 also integrates a USB enumeration function that can automatically negotiate with the USB host to optimize charging current without processor intervention thus eliminating the need for a separate microcontroller and system software.

The MAX8895 is offered with two USB options, the MAX8895X (low speed) and MAX8895Y (full speed). Bothe the baterry chargers operate from a 4.0V to 6.6V supply

The MAX8895 offers Smart Power Selector functionality that can distribute power from the USB power input (VBUS) to the battery and system load. This feature allows simultaneous charging of the battery while powering the system. 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. 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).

Package: Tiny, 2.5mm x 2.5mm, 25-bump WLP (0.4mm pitch)

Operating temperature range: -40°C to +85°C

Price: Start at US$1.50

Availablity: Now