Sunday, February 17, 2008

Li-ion battery charger IC offers superior accuracy

Three power management ICs can be factory-customized to support a multitude of applications

A family of Li-ion battery charger ICs claims the industry's highest performance and accuracy to meet the exacting needs of Li-ion batteries for the portable consumer electronics market. The MC34671, MC34673, and MC34674 single-input autonomous battery charger ICs offer output-voltage accuracy of ±0.4% over temperature and charging-current accuracy of ±5% over temperature. The ICs can be customized to address cell phones, personal media players, navigation systems, and digital still cameras. Pinout, feature set, charging parameters, and LED indication can be programmed into a customized charger IC.

The battery charger ICs deliver up to 1.2 A of charge current to single-cell Li-ion or Li-polymer batteries. The battery charger input voltage can come from an ac adapter or a USB port. The high-input-voltage capability (up to 28 V) eliminates the need for an external input overvoltage protection circuit required in handheld devices.

Each battery charger IC comes in a low-profile 2 x 3 x 0.65-mm ultrathin dual flat no-lead (UDFN) thermally enhanced package. The factory-programmable ICs include flexible output voltages, input over-voltage protection, trickle-charge current, constant charge current, and trickle-charge voltage threshold, recharge threshold, and thermal foldback threshold. (From $0.52 ea/10,000 -- available now.)

Freescale Semiconductor, Austin, TX
Sales 800-521-6274

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