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Battery monitors detect up to four voltage levels

Posted: 30 Oct 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Maxim? MAX6782? MAX6790? battery? monitors?

Maxim Integrated Products has introduced the MAX6782-MAX6790, low-power (5.7?A), 1 percent accurate battery monitors capable of monitoring up to four voltage levels. These devices are designed for monitoring single Li-ion cells or multicell alkaline/NiCd/NiMH powered devices. Each of the four monitored levels offers an independent low-battery output indicator for early warning as the battery level decreases. Monitoring each battery level to within 1 percent accuracy lets the battery operate for a longer period between replacement or recharge.

The new devices also feature adjustable thresholds with low-input bias currents. This allows use of large resistors to minimize current while maintaining threshold accuracy. These devices are offered with fixed or adjustable hysteresis to prevent the low-battery-output chattering often associated with battery-powered applications.

The MAX6782/MAX6783 monitor four battery levels, the MAX6784/MAX6785 three levels, and the MAX6786/MAX6787/MAX6788 two levels. The MAX6789/MAX6790 feature quad-level overvoltage detectors with complementary outputs. The AX6782/MAX6784/MAX6786/MAX6789 are available with push-pull outputs, while the MAX6783/MAX6785/MAX6787/MAX6790 are available with open-drain outputs. The MAX6788 is available with one open-drain and one push-pull output.

This family of devices is offered in space-saving 8/10-pin TDFN and 3-by-3mm, 12/16-lead TQFN packages. They are fully specified from -40C to 85C. Prices start at $1.85 for the MAX6782/MAX6783/MAX6789/MAX6790, $1.48 for the MAX6784/MAX6785 and $1.13 for the MAX6786/MAX6787/MAX6788 (1,000-up, FOB USA).

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