Premo Develops Small 35A Current Sensor for Automotive Applications

Premo has developed what it says is the industry’s smallest 35A current sensor for automotive applications. The sensor has a max height of 8.5mm with less than 2.7 cm2 PCB usage.

Inverters and dc-dc battery chargers for electric and hybrid vehicles require minimum space (Premo’s New Automotive Current Sensor use just 2.4mm3), and maximum power handling per cubic cm (this sensor handles 14.6A/cm3). A proper switching management requires digital controls more than a conventional PWM and a real time high frequency (the sensor is designed for 200kHz ) sampling of the currents flowing through the primary is a must for high speed anticipative control systems.

The new CS-100-AU current sensor is designed with low losses and high temperature stability which allows working frequencies higher than 200 kHz at operating temperatures from -40 up to 155°C.

A precise (Premo sensor precision 2%) sensing of primary currents lets the system manage line and specially load regulation being able to set the workload and optimum working point either to maximize power or to minimize power consumption or dissipation (Sensor dissipation less than 1W). Above all, a low DCR current sensor (Premo’s typical DCR is 0.5mΩ), is an efficient tool for ZVT and ZVS full bridge topologies to minimize stress in High frequency switching MOFET’s.