Japan’s Toshiba said its new photovoltaic output optocoupler for solid-state relays can be used in battery management systems, on-board chargers and inverters.
Japanese electronics manufacturer Toshiba has released a new optocoupler with photovoltaic output for solid-state relays. The TLX9910 solution is designed for automotive equipment such as battery management systems, on-board chargers and inverters.
Photovoltaic output optocouplers are electronic components that use a light-emitting diode (LED) and a photovoltaic cell in a single package, allowing the two circuits to interface optically. They provide electrical isolation between the control circuit and the load circuit of the solid state relay. The latter are electronic switches using semiconductor devices.
“The new TLX9910 is suitable for driving high-voltage power MOSFETs (metal-oxide-semiconductor field-effect transistors) used in solid-state relays,” the company said in a statement, “by combining a new high-voltage product.” With the help of power MOSFETs, this can be achieved with high voltage and high current switching, which is difficult to achieve with photo relays.”
The TLX9910 is a four-pin surface mount device in an SO6 package that is 3.7mm long, 7mm wide, and 2.1mm thick. It has an open circuit voltage of 13.5V, which is 1.9 times higher than the previous Toshiba model.
“As output voltage and current increase, high-voltage power MOSFETs often require higher gate drive voltages,” the company said. “By increasing the minimum open-circuit voltage of new products, it is possible to control the gates of high-voltage power MOSFETs. with a single product, thereby reducing the number of components installed on the PCB.”
According to the data sheet, the TLX9910 has a minimum short circuit current of 8 µA and an insulation voltage of 3750 V rms. The maximum on and off time is 1ms, and the typical on and off times are 0.5ms and 0.1ms respectively.
“Because solid-state relays do not have physical contacts like mechanical relays, the likelihood of contact failure and operating noise during on/off operation is reduced,” the company said, “therefore, they are suitable for switching applications in electric vehicles.”
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Post time: Jul-15-2024