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IR chip cuts component count by 90 percent

Posted: 17 Nov 2003 ?? ?Print Version ?Bookmark and Share

Keywords:international rectifier? ir3220s? h-bridge motor controller ic? hexfeto mosfet? irf7484?

International Rectifier (IR) has introduced its IR3220S H-bridge motor controller IC that is designed for use in automotive dc applications up to 6A. The company claims that the product cuts component count by as much as 90 percent, and reduces design time and cost by up to 20 percent.

Rated at 40V, the IR3220S integrates an H-bridge controller with two high-side Hexfeto MOSFETs in a single 20-pin package. A fully operational and fully protected H-bridge control actuator with forward, reverse, braking and non-braking modes without a microcontroller can be made with the IR3220, two IRF7484 low-side MOSFETs and 10 external passive components. The H-bridge circuit occupies a space measuring 21-by-25mm.

The thermal performance of the H-bridge circuit using the IR3220S and low-side IRF7484 MOSFETs enable operation up to 6A at 85C junction temperature without a heatsink. The low on-resistance, 10?A leakage current, soft-start function and sleep mode all combine to reduce heat during start-up and continuous duty.

The IR3220S is available for $2.90 in 10,000-unit quantities.

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