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IR IC cuts component count by 90 percent

Posted: 15 Dec 2003 ?? ?Print Version ?Bookmark and Share

Keywords:international rectifier? ir3220a? h-bridge motor controller ic?

International Rectifier (IR) has introduced the IR3220S H-bridge motor controller IC for automotive dc applications up to 6A.

The functionality of the IR3220S cuts component count by as much as 90 percent compared to discrete designs, reducing design time and cost by up to 20 percent. Rated at 40V, the product integrates an H-bridge controller with two high-side HEXFET? MOSFETs in a single 20-pin package.

A complete, 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 measures 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. Featuring a programmable soft-start sequence using an internal 20kHz PWM, the product's low on-resistance, 10&mmicro;A leakage current, soft-start function and sleep mode all combine to reduce heat during start-up and continuous duty.

Target applications include drive motors and actuators in automotive applications such as fuel, water and vacuum pumps, compressors, throttle controls, power seats and door locks, window lifters, automatic sunroofs and windshield wipers.

Pricing is $2.90 each in 10,000-unit quantities.

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