Li+ BATTERY-PACK PROTECTOR WITH INTEGRATED PROTECTION FUSE DRIVER
SUNNYVALE, CA-May 28, 2002-Maxim Integrated Products introduces the MAX1906, a highly integrated lithium-ion/lithium-polymer (Li+) battery-pack protector IC. The MAX1906 protects two, three, or four series Li+ cell battery packs against overvoltage conditions. The MAX1906 monitors individual cell voltages. If any cell voltage exceeds the overvoltage threshold for greater than 2.1s, the MAX1906 activates an internal SCR. The SCR sinks sufficient current to blow an external protection fuse, permanently disabling the battery pack. Alternatively, the IC can drive the gate of an external MOSFET to blow the fuse.
The MAX1906 also offers protection against disconnected voltage-sense pins. If a disconnected pin is detected, the DISCON output is forced low. The MAX1906 includes a test mode, which determines if the circuit is operating correctly while in an assembled battery pack.
The MAX1906 is available in a thermally enhanced, space-saving, 16-pin QFN package. It is specified for the extended-industrial temperature range
(-40°C to +85°C). Prices start at $1.50 (1000-up, FOB USA).
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