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Micrel charger IC has 0.75 percent output accuracy

Posted: 28 Jul 2004 ?? ?Print Version ?Bookmark and Share

Keywords:micrel semiconductor? mic79110? battery charger ic?

Micrel Semiconductor's MIC79110 is a simple and accurate lithium ion battery charger. Featuring a built-in pass transistor, precision programmable current limiting (5 percent) and precision voltage termination (1.5 percent overtemperature) all in one small package, the device packs full functionality into a small space.

Other features of the MIC79110 include two independent end-of-charge indications, including a digital indication that is programmable with a resistor-to-ground and an analog current output that is proportional to the output current, allowing for monitoring of the actual charging current. Output voltage accuracy is 0.75 percent over the -5C to 60C temperature range 1.5 percent.

With an output current of 1.2A and input voltage range of 2.5V to 16V, the product features low dropout (500mV over the temperature range), thermal shutdown and reverse polarity protection. In the event the input voltage to the charger is disconnected, the MIC79110 also provides minimal reverse-current and reversed-battery protection.

Available in both fixed 4.2V and adjustable outputs, the new battery charger is offered in the leadless 3-by-3mm MLF-10 with an operating junction temperature range of -40C to 125C.

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