Toshiba Electronics Europe GmbH introduced a new automotive-compliant photorelay designed for 400V battery-related control systems. The TLX9152M features a minimum output withstand voltage (Vبند) of 900V to support applications such as battery and fuel-cell control, as well as battery management systems (BMS) in electric vehicles (EV) where it can be used in circuits to monitor voltages, monitor for mechanical relays sticking and to detect ground faults.
The TLX9152M consists of an infrared (IR) emitting diode optically coupled to a photo-MOSFET. Its fast reaction (TON/Tsub>OFF) time of 1ms (max) is a critical decisive specification for design engineers. The trigger current is 3mA (max), which lowers system energy consumption.
Moreover, the off-state current (Iبند) of this device is 100nA (max) at ambient temperature, meaning that it draws minimal power while inactive. The IR LED has a 20mA (max) forward current (IF), while its photodetection element has a 50mA on-state current (ION).
For a 400V automotive battery system, the test voltage for the withstand voltage test (Hi-Pot test) in the set is 1800V, and the same output withstand voltage as the test voltage can be achieved by using two of the products.
In addition, the TLX9152M is housed in a SO16L-T package (Toshiba’s package code 11-10N1A), widely used for high-voltage photorelays. Toshiba’s existing product, the TLX9160T, housed in the same package, offers an output withstand voltage of 1500V in 800V battery systems when the test voltage is set at 2600V. Therefore, this combination allows a 400V and 800V battery system to share the board.
The TLX9152M is supplied in an SO16L-T package, a modified version of the SO16L featuring only 12 pins. It has a space saving 10.3mm x 10.0mm x 2.45mm form factor that helps ease system integration. When used in 1kV systems, this normally-open (1-Form-A) device exhibits 5mm creepage and clearance distances on its output side, ensuring that effective isolation is maintained. The device is capable of operating across a wide temperature range from -40° to +125°C, and is fully qualified according to the AEC-Q101 standard for automotive applications.
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