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Maxim DS2726 balances and protects Lithium-Ion cells
Single-chip protects with no need for external microcontroller
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By
Maury
Wright
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Power Management DesignLine
(10/20/2008 7:05 PM EDT)
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Battery power has pervaded everything from our portable electronics to our power tools and even bicycles. It's the high-powered end of that spectrum such as tools that Maxim targets the DS2726. The single chip battery-protection IC is designed to protect and balance the load to 5- to 10-cell rechargeable Lithium battery packs.
The DS2726 offers the cell balancing with fault monitoring. High-side p-channel FET drivers provide comprehensive overvoltage, undervoltage, discharge-current, and short-circuit protection. The high-side protection also allows the host system to communicate with a companion fuel-gauge IC such as the DS2788 -- even when a fault condition causes the protection FETs to switch off.
The DS2726 does not need a microcontroller for configuration. Operating characteristics such as voltage protection are pin programmable. The IC is packaged in a 7x7-mm, 32-pin TQFN. The IC sells for $4.58 (1000) and the company offers an evaluation kit to jumpstart a design. Get more info on the product web page.
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