EiceDRIVER With SPI Protects Dependable 48 V Battery Systems

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Battery systems for 48 V are used in  multiple, growing market categories including Mild Hybrid Electrical Vehicles, trucks,  e-wheelers and battery packs for solar panels. These Li-ion battery systems need to  be protected against negative and positive voltages. In addition, these batteries must  be able to quickly and reliably disconnect from loads within microseconds, in the  event of an overcurrent. Since a battery unit may not be dedicated to one vehicle,  status diagnostic and protection threshold configurability are key. 

To address these requirements, Infineon Technologies AG introduces the EiceDRIVER 2ED4820-EM, a smart gate driver with SPI  interface. The gate driver is an ideal companion to Infineon’s 80/100 V OptiMOSTM MOSFETs. It is also a perfect option for switching high-current loads in a 48 V board  net. 

This smart, dual-channel high-side gate driver 2ED4820-EM in the EiceDRIVER APD  family can tolerate negative voltages at Vbat down to -90 V and voltages up to +105  V. These various voltage conditions could occur during a short circuit or a poor  contact connection event. Furthermore, the new device includes a current sense  amplifier for high or low-side measurement. The low-side measurement helps reduce  cost, PCB space and the overall power dissipation, since the existing shunt resistor  of the battery management system can be used. With the two integrated output  channels, it is possible to control a dedicated pre-charge path or separate the  charging and discharging current path of the battery, further reducing PCB space and  overall cost. 


 

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