Microchip Maximizes Battery Capacity with Charge-Management Controllers

9/9/2004 - Microchip Technology Inc., a leading provider of microcontroller and analog semiconductors, announced a single-cell and a dual cell, fully-integrated, charge-management controllers -- each features a charge-safety timer and a temperature monitor. With an overall system accuracy of +/- 0.5 percent, these devices maximize system runtime between charges and ensure that the battery-cell capacity is fully utilized without cycle-life degradation. Meanwhile, the onboard thermal regulation optimizes charge-cycle time, while maintaining the devices’ reliability and simplifying the board design.

The MCP7386X devices extract information regarding charge and temperature status, giving the user elaborate control and sophisticated protection. Onboard safety timers and thermal monitor provide time- and temperature-based charge termination, protecting applications from defective batteries and increasing the battery safety. The MCP7386X controllers also feature reverse-blocking protection, which allows current from a correctly installed battery to flow to the load and block current flow to a backward-installed battery.

The MCP7386X family offers a built-in pass transistor, which minimizes the number of external components and the overall footprint. In addition, these controllers extend battery life with a reverse leakage current of less than 0.4 microamps (typical) and supply a programmable fast-charge current up to 1.2 amps. The MCP73861 device is specified from 4.5V to 12V; the MCP73862 device from 8.7V to 12V and both come with a –40°C to +85°C temperature range. Available in 4.1V/4.2V and 8.2V/8.4V to accommodate a variety of portable products that are powered by one- or two-cell Lithium Ion/ Lithium Polymer batteries (with coke or graphite anodes).

This attachable device is synergistic with Microchip’s power management product portfolio, including the company’s DC/DC converters, linear regulators in power management applications and its PowerSmart® battery managers and monitors.

The MCP7386X devices are offered in a Pb-free, leadless, 4x4, QFN package, which allows for higher power dissipation, and therefore, shorter charging times. Pricing in 1,000-unit quantities is $1.45 USD each for the MCP73861 and $1.64 USD each for the MCP73862. Samples and volume production are available now. For more information contact any Microchip sales representative or authorized worldwide distributor, or visit www.microchip.com/mcp7386x

Microchip Technology Inc. (NASDAQ: MCHP) is a leading provider of microcontroller and analog semiconductors, providing low-risk product development, lower total system cost and faster time to market for thousands of diverse customer applications worldwide. Headquartered in Chandler, Ariz., Microchip offers outstanding technical support along with dependable delivery and quality. For more information, visit the Microchip website at www.microchip.com.

The Microchip name and logo, and PowerSmart are registered trademarks of Microchip Technology Inc. in the USA and other countries.

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