0.7% ACCURATE, INPUT-CURRENT-LIMITED BATTERY CHARGER
SUNNYVALE, CA—August 21, 2000—Maxim Integrated Products introduces the MAX1772, a highly integrated, multichemistry battery charger that simplifies the construction of accurate and efficient chargers. The MAX1772 uses analog inputs to control charge current and voltage, and can be user-programmed or hardwired. A buck topology with synchronous rectification achieves high efficiency.
To avoid overloading the AC adapter the MAX1772 allows the maximum current drawn from the AC adapter to be programmed when the load and the battery charger are supplied simultaneously, reducing the cost of the AC adapter. The MAX1772 provides outputs that can be used to monitor the current drawn from the AC adapter, the battery charging current, and the presence of an AC adapter.
The MAX1772 can charge two to four lithium ion (Li+) series cells, easily providing 4A. When charging, the MAX1772 automatically transitions from regulating current to regulating voltage.
The MAX1772 is available in a space-saving 28-pin QSOP package. It is specified for the extended industrial temperature range (-40°C to +85°C). Prices start from $5.04 (1000-up, FOB USA).
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