On July 3, 2024, Melexis, a global microelectronic engineering company, announced that MLX91220 (5V) and MLX91221 (3V) current sensor chips have received new security certification (UL/IEC 62368-1).
New sensor chips can now be used in systems with higher voltage isolation requirements for SOIC8 and SOIC16 packages.
Among them, the SOIC8 package provides 715V basic isolation capability and 307V enhanced isolation capability, while the SOIC16 package provides up to 1415V basic isolation and 707V enhanced isolation.
This upgrade not only expands the scope of application, but also reduces the number of components in the bill of materials.
Applications that require enhanced isolation include vehicle chargers (OBC) and HVAC / compressors.
In order to ensure the safe operation of high voltage three types of energy sources such as battery packs and chargers of 800V electric vehicles, and to meet the necessary isolation standards, double isolation barriers must be implemented to reduce risks.
Previously, the MLX91220 and MLX91221 were only certified as basic (that is, single) isolation devices, and engineers needed to add additional components, such as isolation amplifiers, to the design.
Now, McLaren’s Hall effect sensor chips have passed the new UL/IEC 62368-1 certification engineers can safely use these chips because of their enhanced isolation capabilities, which effectively protect end users from high-voltage risks without the need for additional isolation barriers.
The new voltage level is (for pollution level 2): ● SOIC16 package: basic isolation (BI) 1415V, enhanced isolation (RI) 707V, ● SOIC8 package: basic isolation (BI) is 715V, enhanced isolation (RI) is 307V.
SOIC8 package product diagram, now engineers can remove unnecessary additional isolation components when using MLX91220 or MLX91221.
In addition, for systems that currently use a single isolation design, it provides the possibility of recertification as a double isolation system without changing the bill of materials.
This “upgrade” is achieved only in the form of further technical certification, which not only increases the value of the popular Hall effect sensor chip, but also greatly simplifies the design process and reduces related engineering work and costs.
The solution maintains its highly accurate, flexible and plug-and-play features while providing enhanced security measures for a variety of applications such as automotive chargers (OBC), DC/DC converters, high-voltage chargers, renewable energy inverters, white goods and robots.
With the new MLX91220 and MLX91221 certifications, we provide engineers with a convenient solution for enhanced isolation, “said Bruno Boury, director of McLaren’s product line.
” We have effectively upgraded 50 product variants at no additional cost to customers, helping them meet critical safety requirements with only one component, reducing not only production costs, but also packaging restrictions.
” MLX91220 and MLX91221 have established a solid market position in automotive and industrial applications with their excellent reliability.
The additional security certification has further strengthened its market leading position.
The two current sensor chips feature a cost-effective and miniaturized SOIC8 narrow-body package with 4mm creeping distance and a larger SOIC16 wide-body package with 8mm creeping distance.
They all have a bandwidth of 300 kHz, a short response time of 2 microseconds, and support a current range of 0 to 50 A RMS, providing accurate and efficient current detection solutions for a variety of applications.
MLX91220 and MLX91221 are now available.
For more information, visit http://www.
melexis.
com/MLX91220 or http://www.
melexis.
com/MLX91221.
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