Power Integrations has qualified its 550V LinkSwitch-TN2 dc-dc converter IC to AEC-Q100 for automotive use.

LinkSwitch-TN2Q-prod

Designed for non-isolated down-conversion, and numbered LNK3206GQ, it can deliver 7W in a fly-back circuit or 360mA in buck converter form, from 60 to 550Vdc in either case.

Regulation, claims the company, i sbetter than +/-5% across line voltage, load, temperature and component tolerances. “Featuring an integrated 750V mosfet the automotive-qualified LinkSwitch-TN2 power for electric vehicle sub-systems connected to the high-voltage bus, including HVAC, climate control, battery management, battery heater and on-board charger systems. The surface-mount device requires no heatsink and occupies a small PCB footprint.”

PowerInt-linkswitch_tn2q-buck-cctAs an example, the data sheet shows a buck converter that can deliver 15V at up to 300mA, designed to meet the -40 to +85°C AEC-Q100 Grade 3 temperature requirements.

No-load consumption can be under 50mW and stand-by at <100μA is also possible.

It comes in a seven-pin plastic SMD-8C package, with four of the pins connected in parallel for heatsinking. This leaves the chip with only four different connections – the data sheet is worth a read to see how the voltage feedback is done.