Product category: Power Supply ICs and Controllers
News Release from: International Rectifier | Subject: IR3220S
Edited by the Electronicstalk Editorial Team on 30 January 2004
Space-saving motor controller
hits the streets
The IR3220S is a highly integrated 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 with 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 HEXFET mosfets in a single 20-pin package.
This article was originally published on Electronicstalk on 30 January 2004 at 8.00am (UK)
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A complete, fully operational and fully protected H-bridge control actuator with forward, reverse, braking and nonbraking modes without a microcontroller can be made with the IR3220, two IRF7484 low-side mosfets and ten external passive components.
The H-bridge circuit occupies 21 x 25mm - 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 windscreen wipers.
Shoot-through, overtemperature and overcurrent protection, overvoltage clamp and undervoltage 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 inrush currents.
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, low 10uA leakage current, soft-start function and sleep mode all combine to reduce heat during startup and continuous duty.
The sleep mode makes IR3220S H-bridge circuits ideal for direct battery connection.
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