Premo develops Industry Smallest 35 Amp current sensor for automotive

SENSORS: 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 require digital controls more than 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 toroidal ferrite core which allows working frequencies higher than 200 kHz at operating temperatures from -40 up to 155C.

The converters for hybrid and electric vehicles works at high voltage (400V) in the input site, which makes a must to isolate primary winding of the current sensor, directly connected to the high voltage circuit, from the secondary site, connected to the control circuit. Premo current sensor guarantees 3kV isolation and a creepage distance of greater than 6.5mm.

A precise (Premo sensor precision 2 percent) sensing of primary currents let 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.

Among those characteristics PREMO current sensor is fully AECQ-200C complaint and ready to use in AOI (Automatic Soldering Inspection) system, as required in automotive market.

-Edited by Kelsey Anderson