In a compact SO12L-T package, Toshiba Electronic Devices & Storage Corporation introduced the “TLX9161T,” an automotive photorelay that can support high voltage vehicle batteries by achieving an output withstand voltage of 1500V (min). Shipments in bulk begin today.
Improving cruising range and cutting down on charging periods are two major obstacles to the widespread adoption of electric vehicles. To address this, the battery system must operate efficiently.
The battery management system (BMS) does this by keeping an eye on the battery’s charge status to allow for high-efficiency system operation and by keeping an eye on the isolation between the battery and the vehicle body to guarantee that high-voltage batteries are used safely. BMS that manage high voltages employ electrically isolated photorelays.
Key Features
- Small package: SO12L-T (7.76×10.0×2.45 (mm) (typ.))
- Output withstand voltage: VOFF=1500V (min)
- Normally opened (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
The new high-voltage photorelay from Toshiba is a scaled-down version of the company’s TLX9160T photorelay, with an output withstand voltage of 1500V (min).
Integration of the TLX9160T’s integrated MOSFET chip into the SO12L-T package, which has a mounting area that is roughly 25% smaller than that of the TLX9160T SO16L-T container, has been accomplished through miniaturization. The BMS becomes smaller and less expensive as a result of this size decrease.
The same circuit board pattern design can be used because the pin pitch and pin layout are identical to those of the SO16L-T.
The resin used in the new photorelay has a Comparative Tracking Index (CTI) of more than 600, placing it in Material Group I of the IEC 60664-1 international standard. A creepage distance of over 5 mm on the detector side is guaranteed by the pin arrangement.
By doing this, IEC 60664-1 compliance is achieved, allowing for an operating voltage of 1000V. In order to help achieve a carbon-neutral society, Toshiba will keep growing its range of automotive photorelay devices and provide solutions that tackle the difficulties in making electric vehicles more widely used.
Applications
- Automotive equipment: BMS (battery voltage monitoring, mechanical relay sticking detections, ground fault detections, etc.)
- Replacement of mechanical relays
