ACS37200 with a 50 µ Ω conductor resistance can reduce power loss by 90% and system size by up to 95% in harsh application scenarios such as hybrid/electric vehicles, industrial and data centers.
Allegro MicroSystems, Inc. (hereinafter referred to as "Allegro", NASDAQ stock code: ALGM), one of the global leaders in motion control and energy-saving system power and sensing solutions, announced today the launch of ACS37200 isolated current sensor, providing a breakthrough solution for efficiency and power density challenges in high current applications.
As engineers design increasingly compact and powerful systems for hybrid electric vehicles (HEV)/electric vehicles (EV), industrial automation, AI data centers, and solar inverters, the heat and power losses generated by traditional shunt resistors have become the main design bottlenecks. ACS37200, with its outstanding 50 µ Ω conductor resistance in the industry, has successfully overcome this limitation, enabling designers to build smaller, more efficient, and more reliable power systems.
Core breakthrough: From heat waste to power optimization
In high current systems, every milliohm of resistance is crucial. Taking a typical 100A design as an example, if a 0.5m Ω shunt resistor is used, up to 5 watts of power will be wasted in the form of pure heat, requiring expensive and space consuming heat sinks. And ACS37200, with its ultra-low resistance of 50 µ Ω, significantly reduces the power loss to only 0.5 watts - a decrease of 90%. This means less energy is wasted, allowing more power to be used to drive vehicles or run servers, directly increasing the range of hybrid/electric vehicles and effectively reducing the operating costs of data centers.
Breakthrough in power density
This efficiency improvement is the key driving force for achieving high power density. Although Allegro's previous generation integrated sensors (such as ACS772) have achieved a nearly 7-fold reduction in size compared to bulky discrete shunt solutions, the new ACS37200, which uses a compact 100 mm ² PSOF package, takes this advantage to new heights: it reduces the CB package size of ACS772 by nearly 70%, ultimately achieving a 20 fold reduction in total board area compared to traditional shunt solutions - equivalent to a significant 95% reduction in circuit board space. Due to the extremely low heat generated by the sensor, designers can eliminate the need for bulky heat sinks; Its highly integrated architecture also does not require external isolation components, directly achieving a more compact layout and higher power density.
Matt Hein, Product Line Director of Allegro MicroSystems' current sensors, said, "Our customers constantly provide us with feedback that power is the main bottleneck in system design. The current system needs to achieve higher power monitoring, conversion, and transmission capabilities than ever before with the same or even smaller external dimensions. By significantly reducing power losses and achieving 95% board area optimization, Allegro is providing customers with more design freedom and higher power density, helping them develop smaller and more efficient systems faster, and embrace the future of electric mobility, industrial automation, and clean energy. ”
Simplify design and enhance security
In addition to improving efficiency and power density, the fully integrated ACS37200 also simplifies the design process. As a single factory calibration component certified by UL 62368-1, it can replace multiple discrete components, including shunt resistors, isolation amplifiers, and related passive components. This not only reduces the number of Bill of Materials (BOM) and optimizes the supply chain, but also eliminates the complex high-voltage isolation design process, thereby enhancing the safety and reliability of the system.
Main features and advantages of ACS37200
•Ultra low power loss: The conductor resistance is as low as 50 µ Ω, reducing power loss by 90% compared to a typical 0.5m Ω shunt scheme.
•High power density: The board area is reduced by 95% compared to the split type splitter solution, which can achieve more compact and cost-effective end products.
Reliable certification isolation: Provides certification based isolation of 1000 VRMS/1414 VDC in a single surface mount package and is certified by UL 62368-1.
• Design simplification: Replace multiple discrete components (shunt resistors, isolation amplifiers) with space saving 8-pin PSOF packaging and factory calibrated ICs.
To learn how Allegro's isolated current sensor ACS37200 reduces sensing related power loss by 90%, please visit the link below for a data manual and related information:
www.allegromicro.com/acs37200
