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Smart High-Side Switches Drive Load Currents Upto 45A

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Smart High-Side Switches Drive Load Currents Upto 45A

Infineon has announced two high-side power switch families based on its SMART7 power ICs designed specifically for automotive applications such as Body Control Modules or Power Distribution Centers. The PROFET+2 devices address automotive 12 V lighting load applications and capacitive loads. These comprise e. g. halogen bulbs in external lighting control, interior lighting and dimming, as well as LED lighting. The High Current PROFET drives high current loads in automotive and industrial applications. The family covers a wide range of load currents from 5A to 45A and are optimized for high current 12V and 24V applications, like heating applications and power distribution.

Based on thin-wafer technology that reduces power losses and chip sizes, the SMART7 power ICs enable body and convenience applications with further enhanced protection schemes, lower power dissipation in smaller packages at less overall system cost.

“Car makers want in-vehicle electronic systems to provide a large number of energy-efficient functions in as little space as possible. Infineon supports this trend with its new power IC manufacturing technology SMART7”, the firm noted in the announcement. “SMART7 power ICs drive, diagnose and protect loads in applications like heating, power distribution, air-conditioning, exterior and interior lighting, seat and mirror adjustment. They also provide a cost-effective and robust replacement of electromechanical relays and fuses.”

The new devices include PROFET+2 and High Current PROFET. “In this decade, we have delivered one billion PROFET+ switches, the predecessor family to PROFET+2,” said Andreas Doll, Vice President and General Manager, Body Power Automotive at Infineon. “The SMART7 power ICs enable body and convenience applications with further enhanced protection schemes, lower power dissipation in smaller packages at less overall system cost for our customers.”

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PROFET+2 devices come with diagnostics and protection features. They maintain pin-out compatibility with their predecessor family PROFET+ for zero-cost migration. There is no ECU layout change needed, if single-channel devices are replaced by dual-channel variants and vice versa, says the firm.

Compared to their predecessor family, the PROFET+2 devices are claimed up to 40 percent smaller in package size and 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 PROFETs lower on-state resistances R DS(ON) from 8 mΩ down to 2 mΩ in the same TSDSO-14 package.

Compared to established smart power switches in the DPAK package, the footprint of the TSDSO-14 is 50 percent smaller. Compared to D²PAK, it is 80 percent smaller.

Both families 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) is below 5 percent at a nominal current.

Their protection features comprise current tripping, over temperature, overvoltage, load dump and reverse battery capability ReverSave. A further benchmark feature is a cranking voltage capability able to work down to 3.1 V.

The PROFET+2 device BTS7008-2EPA with 2×8 mΩ is released for mass production. Engineering samples of further switches in both families are available. Their mass production is planned to start as of Q4 2017 and later.

All high-side switches will be qualified in accordance with AEC Q100.

Additional information, such as data sheets and application notes, is available at www.infineon.com/switches and at www.infineon.com/profet+2

For full Press release, click here.

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