Power Integrations high-current LinkSwitch-TN2Q IC

Power Integrations has launched a high-current member of its LinkSwitch-TN2Q automotive switcher IC family that provides up to 850 mA of output current without the need for metal heatsinking. The highly integrated ICs support a wide input voltage of 30 to 550 VDC, enabling the devices to start up and operate below the required safety extra low voltage (SELV) threshold in functional safety EV applications.

As electronics in electric vehicles grow more sophisticated, automotive customers need higher supply currents to drive them. The 850 mA rating for this new IC represents an increase of 230% in available output current compared with other members of the LinkSwitch-TN2Q family.

LinkSwitch-TN2Q ICs are AEC-Q100 qualified and support buck, buck-boost and non-isolated flyback converter topologies. Each device incorporates a 750 V power 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 overvoltage protection circuitry in a monolithic IC.

LinkSwitch-TN2Q ICs consume very little current in standby, resulting in power supply designs that easily meet less than 50 mW no-load at 400 VDC input. The LinkSwitch-TN2Q IC’s safety features are designed to protect against input and output overvoltage, device overtemperature, lost regulation and power supply output overload or short-circuit faults.