As engineers design increasingly compact and powerful systems for hybrid and electric vehicles (HVEs/EVs), industrial automation, AI data centers, and solar inverters, the heat and power losses generated by traditional shunt resistors have become a key bottleneck. The ACS37200, with its driver resistance of only 50 µΩ, eliminates this obstacle and enables the creation of smaller, more efficient, and more reliable systems.
In high-current systems, every milliohm counts. A typical 100 A design with a 0.5 mΩ shunt resistance can waste up to 5 W as heat, requiring large and expensive heatsinks. The ACS37200 reduces this loss to just 0.5 W, a 90% reduction. This allows for better utilization of available power, improved electric vehicle range, and reduced operating costs for data centers.
While previous sensors like the ACS772 already offered a size reduction of up to 7 times compared to discrete solutions, the new ACS37200 in its 100 mm² PSOF package is almost 70% smaller than the ACS772 and 20 times more compact than a traditional shunt solution, which equates to a 95% reduction in board space.
Thanks to its minimal heat generation, it eliminates the need for bulky heat sinks, and its integrated architecture eliminates external insulation components, allowing for more compact designs with higher power density.
“Power is one of the biggest bottlenecks in today’s systems. The ACS37200 offers greater design freedom, higher power density, and a faster path to creating smaller, more efficient systems for electric mobility, industrial automation, and clean energy,” said Matt Hein, Line Director of Current Sensors at Allegro.
The ACS37200 replaces multiple discrete components—such as the shunt resistor, isolation amplifier, and passive components—with a single, factory-calibrated integrated circuit certified to UL 62368-1. This reduces the bill of materials, simplifies the supply chain, and improves system safety and reliability.
Features and Benefits
: Ultra-low power loss: only 50 µΩ resistance reduces losses by 90%.
Unprecedented power density: 95% smaller footprint than discrete solutions.
Certified robust isolation: 1000 VRMS / 1414 VDC basic galvanic isolation certified to UL 62368-1.
Simplified design: replaces multiple components with a single calibrated 8-pin IC in a PSOF package.
