Smart power closure systems
Smart power closure modules that control entry and exit points, as one of the direct interfaces to the driver and passengers, are an important contributor to the user experience and a differentiator for the car-makers. Smart power closures include:
- Power Lift Gate and Power Boot/Trunk, e.g., enabling access to the rear storage by raising, lowering, and latching of the rear access panel on an SUV or sedan, often with hands-free operation
- Power Sliding Door, e.g., horizontal movement and latching of the side doors of a van, minivan, or other MPV
- Power Doors, e.g., self-opening and self-closing of driver and passenger doors to enable easy ingress and egress from the vehicle
- Power Tail Gate e.g., raising and lowering of the door on the bed of a pickup truck
- Power Convertible Top, e.g., opening or closing of a soft-top or hard roof panels in a cabriolet (convertible)
Smart window lifts and sunroof modules use smaller motors, have different requirements, and favor mechatronic solutions
While electromechanical systems such as power windows have long been standard features of the modern car, power lift gates, and other smart power closures are now making the move from optional extras to standard equipment. They are comparable with similar challenges in meeting requirements for supply, communication, sense, actuation and control, and quiescent current targets. To manage smart power closure modules in the smallest space and with the lowest power dissipation and low quiescent current, integration of functions is one of the key factors for design.
The Infineon product portfolio here is best prepared and offers many product families with high integration:
- SBC (System Basis Chip) gathers in one product a system supply, communication interface, diagnosis, switching functions, and failsafe output with best-in-class quiescent current
- Multi-MOSFET Driver IC to control up to eight Half-Bridges (with external MOSFETs) with best-in-class quiescent current
- NovalithIC™, low ohmic protected single Half-Bridge Switch (with integrated MOSFETs)
As with many power motor control designs, one of the critical aspects is controlling EMC emissions during PWM operation. The Infineon products here (Multi-MOSFET Driver IC and NovalithIC™) include features that avoid the compromise between EMC performance and power dissipation.
An additional challenge for the smart power closure module designer is the increasing number of configurable variants driven by a car manufacturer’s platform strategy. To easily support the diverse variants with a single PCB design, scalability within product families has become necessary.
Infineon’s Traveo II™ MCU family has scalable memory and I/O capability to meet OEM’s platform Power Closure design. Infineon’s PROFET™ family of smart high side power switches, for example, has the most scalable portfolio of high side switches in the market.
CAN FD Transceivers
Hall Position Sensors
Low Drop-Out Regulators
LIN Transceivers
Microcontrollers
MOSFETs
Smart Half Bridge
Smart High Side Switches
System Basis Chips
All of these applications can be managed either electro-mechanically or fully electronically, but the latter approach has significant advantages:
- Avoids driver irritation over relay clicking, necessary as cars become quieter (e.g., hybrids, EVs, and cars with start/stop function)
- Brings the comfort of the soft stop of motion through PWM motor regulation, avoiding the noise and hazard of a hard closure slam, improving the user experience
- Enables lighter and thinner door or body panels, as smaller footprints and lower profiles of semiconductors allow thinner ECUs
- Preserves the user experience and avoids service calls, as solid-state solutions bring additional intelligence, robustness, and safety via sense, diagnosis, and protection elements
- Control Software updated by FOTA, to overwrite control software after production release
Regarding the ECU design, seat control module systems require:
- A set of scalable Multi-MOSFET Drivers to configure any kind of Half-Bridges with external MOSFETs
- A set of robust, scalable MOSFETs for creating half-bridges and H-bridges
- A supply and communication interface which can be built discretely (voltage regulator + LIN/ CAN transceiver) or integrated (System Basis Chip: SBC)
- A set of scalable single- and multi-channel High-Side Switches with sense, diagnostic and protection functions
- A set of scalable Single Half-Bridge Switches with sense, diagnosis, and protection functions
A µC capability fitting to the system requirements from low cost up to high-end modules with local decision-making options.
myInfineon: Join now and enjoy the benefits
Learn how to control MOSFETs in PWM with the evalkits DC/BLDC for MOTIX™ motor system IC . Know how to control the switching times of the external MOSFETs
- Smart power closures enhance the user experience by providing comfort and convenience features for entering or exiting the vehicle.
- Infineon offers a comprehensive chipset solution that addresses system-level requirements such as size and cost reduction, EMC testing, high reliability, and robustness, catering to different integration levels and scalability for smart power closure systems.
In this training, you will:
- Be able to understand the MOSFET turn-on process after watching the overview on MOSFET driver optimization
- Have also a deeper look on adaptive MOSFET control
In this training, you will:
- Learn about Infineon‘s TLE956x motor system ICs, which are the first devices in the world that combine half-bridge gate drivers, power supply and a communication interface in a single device
- Get also an overview of TLE956x’s main features and benefits
In this training, you will:
- Learn about the TLE985x family, which belongs to a platform of products developed specifically for highly integrated motor control solutions where a small footprint is essential
- Get also an overview of TLE985x’s main features and benefits
In this training, you will:
- Learn about Infineon’s TLE9210x, which is a family of Multi MOSFET Driver ICs, designed to control up to eight half-bridges (up to 16 n-channel MOSFETs) with one packaged device
- Get also an overview of overview of TLE9210x’s main features and applications
In this training you will:
- Know more about Infineon’s wide MOSFET selection for 48 V mild-hybrid electric vehicle, or MHEV, applications
- Understand why and how Infineon is strengthening its position in the 40 V MOSFET market, and be familiar with Infineon’s newest 60 V MOSFETs
In this training you will:
- Identify the specific components used in a MOSFET-based application
- Be aware of what to consider when you replace relays with MOSFETs
Training topics:
- Do you know Infineon’s OPTIREG™ power supply solutions?
- Do you know why OPTIREG™ products stand out from other solutions in the market?
Description:
- Understand how NovalithIC™ devices work.
- Get to know their main features, applications and portfolio, and identify the specific characteristics of the latest B-T-N-99-x-x devices.
