Toshiba Electronics Europe GmbH has unveiled the TLX9152M, an automotive-compliant photorelay designed for 400V battery control systems in electric vehicles (EVs). This innovative component enables car manufacturers to replace mechanical relays, enhancing high-voltage isolation and facilitating battery management system (BMS) monitoring.

Key Features

 - High Voltage Capability:

 · Minimum output withstand voltage (VOFF) of 900V, suitable for battery and fuel-cell control applications.

 · Allows for monitoring voltages, detecting mechanical relay sticking, and identifying ground faults.

 - Fast Reaction Time: 

 · TON/TOFF time of 1ms (max), critical for responsive design.

 - Low Power Consumption:

 · Trigger current of just 3mA (max) and off-state current (IOFF) of 100nA (max) at ambient temperature ensure minimal power draw when inactive.

 · IR LED forward current (IF) of 20mA (max) and photodetection element on-state current (ION) of 50mA.

 - Test Voltage Requirements:

For a 400V automotive battery, the withstand voltage test (Hi-Pot test) is set at 1800V. Using two TLX9152M units can achieve this output withstand voltage.

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Packaging and Design

The TLX9152M is housed in a compact SO16L-T package (Toshiba package code 11-10N1A), which is commonly used for high-voltage photorelays. This modified SO16 package features only 12 pins and has a space-saving form factor of 10.3mm x 10.0mm x 2.45mm, facilitating easy integration into systems.

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Additional Specifications

Creepage and Clearance:

In 1kV systems, the device maintains effective isolation with creepage and clearance distances of 5mm on its output side.

Temperature Range:

Operates reliably across a wide temperature range of -40° to +125°C.

Automotive Qualification:

Fully qualified according to the AEC-Q101 standard for automotive applications.

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Conclusion

The TLX9152M photorelay represents a significant advancement in EV technology, offering enhanced reliability, efficiency, and design flexibility for automotive battery systems. This product will help streamline the integration of high-voltage components in electric vehicles, supporting the industry's transition to more sustainable transportation.