Toshiba has recently launched “TLX9152M,” an automotive photorelay with an output withstand voltage of 900 V (min) that is highly suitable for application in high-voltage automotive batteries. The new photorelay is housed in a SO16L-T package.
Improved charge times and a longer cruising range are essential for the wider adoption of electric vehicles, and both require more efficient operation of battery systems. Battery management systems (BMS) realize efficient system operation by monitoring the battery charge status, plus the insulation between the battery and the vehicle body which is essential for the safe use of high-voltage batteries. In BMS that must handle high voltages, electrically insulated photorelays are used.
Photorelays commonly used in battery systems must have a withstand voltage of approximately twice the system voltage. Given this, an output withstand voltage of over 800 V is necessary for a 400 V system. Toshiba’s new product is suitable for 400 V systems as it has an output withstand voltage/supply voltage of 900 V.
TLX9152M is housed in a SO16L-T package, widely used for high-voltage photorelays including Toshiba’s TLX9160T, which has an output withstand voltage of 1500V. The use of this package facilitates common circuit board pattern design. Volume shipments of this photorelay have started.
Key Applications
- Automotive equipment
- Battery Management Systems: battery voltage monitoring, mechanical relay sticking detection, ground fault detection, etc.
- Replacement of mechanical relays
Key Features
- Output withstand voltage: VOFF=900V (min)
- Normally open (1-Form-A) device
- Avalanche current rating: IAV=0.6mA
- High isolation voltage: 5000Vrms (min)
- AEC-Q101 qualified
- Compliant with IEC 60664-1 International Standard
