It provides up to 850mA of output current without the need for metal heatsinking and a wide input voltage of 30 to 550V DC. This capability enables the IC to start up and operate below the required safety extra low voltage (SELV) threshold in functional safety EV applications.

Increasingly sophisticated electronics in EVs require higher supply currents to drive them, explains Edward Ong, senior product marketing manager at Power Integrations. The 850mA rating represents an increase of 230% in available output current compared with other members of the LinkSwitch-TN2Q family. “LinkSwitch-TN2Q ICs reduce part-count by including control, driver, protection circuitry and a 750V power MOSFET in an SMD package,” adds Ong.

LinkSwitch-TN2Q ICs are AEC-Q100-qualified and support buck, buck-boost and non-isolated flyback converter topologies. Each device incorporates a 750V MOSFET, oscillator, on/off control, a high-voltage switched current source for self-biasing, frequency jittering, fast (cycle-by-cycle) current sensing and current limit, hysteretic thermal shutdown, and output over-voltage protection circuitry in a monolithic IC.

The low current consumption in standby mode means power supply designs can easily meet less than 50mW no-load at 400V DC input, says the company. Protection features enable safe and reliable power supplies, including protection against input and output over-voltage, device over-temperature, lost regulation, and power supply output overload or short circuit faults. 

A reference design kit (RDK-707Q) is available to evaluate the LinkSwitch-TN2Q IC family. Devices are available from the company or one of its authorized distributors, Digi-Key, Farnell, Mouser and RS Components.