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High-Isolation Optocouplers for Enhanced EV Safety

A new series of high-isolation optocouplers has been introduced to meet the stringent safety and isolation requirements of electric vehicle (EV) applications. These optocouplers provide reinforced isolation, high noise immunity, and reliable performance in harsh automotive environments, making them ideal for battery management systems (BMS), onboard chargers, and power inverters.

Key Features

• Reinforced isolation voltage up to 5000 Vrms or higher
• Wide operating temperature range (-40°C to +125°C)
• High common-mode transient immunity (CMTI)
• Fast switching speeds
• AEC-Q101 qualified for automotive applications
• Compact package options for space-constrained designs

These optocouplers help ensure galvanic isolation between high-voltage and low-voltage circuits, which is critical for passenger safety and system reliability in EVs.

Target Applications

• Battery Management Systems (BMS)
• Onboard chargers (OBC)
• DC-DC converters and inverters
• Vehicle-to-Grid (V2G) systems
• Industrial motor drives and power supplies

With increasing voltage levels in modern EVs (800V+ architectures), high-isolation optocouplers play a vital role in protecting sensitive electronics and ensuring functional safety compliance.

Source:  Electronics For You