Smart power switches improve efficiency with smaller size for lighting control

Based on SMART7, Infineon introduces the two high-side power switch families PROFET+2 and High Current PROFET. PROFET+2 is for double-digit reduction in power dissipation and PCB space and was developed for automotive 12 V lighting load applications and capacitive loads. They target halogen bulbs in external lighting control, interior lighting and dimming, as well as LED lighting. The PROFET+2 devices provide diagnostics and protection features and maintain pin-out compatibility with the PROFET+ family. Compared to their PROFET+family, the PROFET+2 devices are up to 40 percent smaller in package size. They improve energy efficiency with 50 percent lower current consumption. The lowest ohmic PROFET+2 device is the 8 mΩ dual-channel switch BTS7008-2EPA with protection functions and diagnosis.

The new High Current PROFET devices extend the on-state resistances R_DS(ON) from 8 mΩ down to 2 mΩ in the same TSDSO-14 package. A High Current PROFET in a TSDSO-14 package has a pin pitch of only 0.65 mm. Compared to established smart power switches in the DPAK package, the footprint of the TSDSO-14 is 50% smaller, and compared to D²PAK, it is 80% smaller. The family reduces power losses in control modules up to 60%. The family addresses a wide range of heating and power distribution applications. These comprise glow plug controller, PTC (positive temperature coefficient) heater, starter relay, horn, trailer node, and auxiliary power outlet.

Both families, PROFET+2 and High Current PROFET, are pin-compatible and share the main feature set. Their on-state resistance R_DS(ON) scales from 2 mΩ to 200 mΩ. Their load current sense accuracy (k_ILIS ) below 5 percent at a nominal current is benchmark in the market. Their protection features comprise current tripping, over temperature, overvoltage, load dump and reverse battery capability ReverSave. Additional information, including data sheets and application notes, is available at www.infineon.com/switches and at www.infineon.com/profet+2.

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