EL SEGUNDO, Calif. November 2003 - International Rectifier, IR® (NYSE: IRF) today introduces the highly integrated IR3220S H-bridge motor controller IC for automotive DC applications up to 6A. The extensive functionality of the IR3220S cuts component count by as much as 90% compared to discrete designs, reducing design time and cost by up to 20%. The IR3220S enables rugged designs with benchmark electrical characteristics.

Rated at 40V, the IR3220S integrates an H-bridge controller with two very efficient high-side HEXFETÒ 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 occupies 21mm x 25mm, or less than one square inch, as much as 80% smaller than an H-bridge circuit using discrete devices.

The IR3220S has been specifically designed to 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.

Shoot-through, over-temperature and over-current protection, over-voltage clamp and under-voltage lockout for both high- and low-side are built-in to enable a rugged H-bridge design. The innovative shoot-through design controls each leg of the H-bridge independently and eliminates diagonal commands. The IR3220S also integrates a programmable soft-start sequence using an internal 20kHz PWM to limit in-rush currents.

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

Ivo Jurek, Vice President, International Rectifier Automotive Products, said, "Designing safe and reliable automotive motor drive circuits can rapidly become a complex task involving over 100 components and requiring experience in power and thermal design. Working with leading automotive manufacturers, IR has developed a new integrated solution that simplifies H-bridge driver circuit design for the large number of DC motors found in automobiles today."

Data sheets, application notes and a reference design are available. For more information, visit us at auto.irf.com.

Part Number	Description	Package	VCC	RDS(ON)	Iout @ Ta=85°C	IShutdown	PWM	ISS(leakage current)	Tjmax
IR3220S	H-bridge controller IC w/two high-side MOSFETs, Q100 qualified	20-pin SOIC	40V	13mOhms	6A	30A	20kHz	10mA	150°C

Pricing and Availability

The new IR3220S is available immediately. Pricing is US $2.90 each in 10,000-unit quantities.

High Resolution JPEGs are available in the Press Room.