Power PROFET™ is a benchmark family of ultra-low ohmic protected high-side switches (1.0mΩ to 2.5mΩ) with integrated protection functions and diagnostics for automotive and 12V industrial markets. The devices are especially designed to drive high current loads of 25 to 40A DC and to replace high current relays and fuses in a wide range of applications such as power distribution and heating. Power PROFET™ switches are also an ideal driving solution for an increasing number of applications with high switching cycle requirements.
Infineon’s low ohmic high-side smart switches for power distribution and heating applications
Power PROFET™s are single channel smart high Side Power Switches especially designed to drive high current loads up to 40A in the automotive environment for applications like heaters, glow plugs, fan and pump, where high energy capability is required.
Embedded in standard power Packages and a multichip technology, the Power PROFET family offers high current and energy capability in a scalable family.
With four devices from 2.5mOhm down to 1mOhm in a D2PAK package and a 2.5mOhm device in a DPAK package, Power PROFETs are designed to drive high currents and challenging current profiles such as DC motor inrush at start up, especially for under the hood applications.
The ability to drive high current loads makes Power PROFETs very well adapted to replace electromechanical relays, fuses and discrete circuits in power distribution and other applications in a 12V board net.
Power PROFETs are qualified for automotive applications according to AEC-Q100.
Protection and diagnostic
Similar to the other PROFET families, the Power PROFETs enable diagnosis and protective functions through several protection mechanisms. They embed an over current threshold / trip protection concept which latches whenever being triggered. This protection mechanism enables the Power PROFETs to achieve high robustness even at fault conditions like severe over currents or low ohmic short circuits.
To avoid critical junction temperatures at high current below the overcurrent threshold, Power PROFET also embeds a latching over-temperature protection concept.
Power PROFETs offer the lowest on-resistance and the highest energy capability on the market. Furthermore they have an outstanding thermal capability compared to the other PROFET families.
To serve the demanding application requirements in this high current range, Power PROFET design pursuits the following targets:
- Easy and versatile device control
- Analogue load current diagnosis with accuracy improvement options on system level
- High energy capable power stage to drive high current loads with high inrush events or high inductivities in a repetitive manner
- Autonomous self-protection with high repetition robustness
The Power PROFET™ family offers the highest energy ratings ever specified for a PROFET™.
This family is ideal to address high current loads with fluctuating current profile (DC motors applications...) and are esspecially designed to manage high current and high energy for applications under the hood. In addition, the power packages allow enhanced thermal capability and repetitive inductive clamping.
Therefore the Power PROFET™ are the only scalable family of protected devices capable to replace relays & fuses from 20A up to 40A DC. They reduce power losses up to a factor of 2 compared to a relay.
Relay replacement through semiconductor contributes to the increase of safety through diagnosis. Power PROFETs are also immune to dust, shock and vibrations and therefore reduce maintenance. Furthermore they contribute to the increase of comfort through noiseless and smaller modules.
Thanks to their low resistance, Power PROFET™ are ideal to be designed-in under the hood where the ambient temperature is high.
Power PROFET™ also enable the decentralization of power distribution architecture in a larger scale.
Power PROFET™ are ideal to drive DC motors with high inrush current as vacuum pumps, fans, ventilators and wipers. They also have a high switching cycle robustness, which allows to drive the starter relay in a start stop system.
You can download our relay replacement appnote to have more information about relay replacement in general. Link to Appnote relay replacement
Appnotes, PSPICE simulation models, Evaluation Boards and Arduino Shields are available.