Battery charger IC auto-selects from USB or AC source

Chandler, Ariz.—Claiming the most extensive features and performance of any dual-input, auto-switching integrated charger IC on the market, Microchip Technology's MCP73837 and MCP73838 (MCP73837/8) high-current lithium-ion/polymer controllers feature automatic USB or AC adapter power-source selection. The fully integrated chargers, for single-cell applications, enable charge currents of up to 1 amp from an AC power source for faster charge cycles or up to 100 mA or 500 mA from a USB port for portable consumer electronic devices such as PDAs, portable DVD players, and personal media players.

“The MCP73837/8 chargers offer the best combination of key features, performance, safety and package options of any dual-input, auto-switching integrated battery charger on the market,” said Bryan Liddiard, vice president of marketing for the Analog and Interface Products Division. “Additionally, with numerous key charging parameter combinations as standard, these devices are flexible enough for use in a broad range of applications.”

On-chip safety features including thermal regulation, cell-temperature monitoring and charge-timers minimize charger-related system damage for safer and more efficient charging. Charging parameters available as standard options on the MCP73837/8 devices include preconditioning current threshold and current ratio, charge termination threshold, and recharge threshold ratio.

Development Support
Microchip also announced the MCP73837/8 evaluation board, (Part # MCP7383XEV-DIBC) to help designers evaluate the MCP73837/8 chargers in their designs. The board is expected to ship late this month. It's priced at $40 each.

Pricing, availability: Now, in 10-pin MSOP and 3-by-3 mm DFN packages, for 89 cents each in 10,000-unit quantities. Samples are available today; click here; and here to place volume production orders.
Datasheet: here.

Microchip Technology , 1-480-792-7200,

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