Smart Low-Side & High-Side Switches – Infineon
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Infineon offers the market’s most comprehensive portfolio of smart power switches
Smart power switches provide easier control, while offering diagnostics and increased protection, higher reliability and greater cost savings compared to discrete solutions. Smart, or intelligent power switches (IPD), consist of a power stage and control technology to provide advanced functionality such as preventing damage caused by high temperature, over current, or over voltage. This protected MOSFET power switch control circuitry also enables diagnostics to indicate the operation state of the smart power switch to the system.
Infineon’s range of protected MOSFET power switch includes both smart low-side (ground switching) and high-side switches (power switching). Our PROFET™ portfolio of smart high-side protected MOSFET power switches are automotive qualified and suitable for nearly all automotive applications as well as many industrial applications. These high-efficient power distribution switch ICs provide excellent protection against short circuit, overcurrent, and overtemperature while driving capacitive, inductive, and resistive loads.
Infineon’s HITFET™ and TEMPFET™ smart low-side power switch product families are the ideal solution for applications that need ground switching. Our range of smart low-side power distribution switches offers advanced protection from high temperature, advanced diagnostics, high speed PWM, slew rate control, and improved performance and reliability resulting in potential system cost savings.
Smart low-side & high-side switches product solutions
Infineon’s protected MOSFET power switches are highly integrated load switches and incorporate a broad range of smart features, including diagnostics and protection. These integrated load switches offer additional robustness and enhanced thermal capabilities.
The PROFET™ (12V and 24V) families are Infineon's solution for power switch ICs. PROFET™ stands for PROtected MOSFET and gathers all high-side switches, including automotive qualified and products for industrial use. PROFET™ intelligent power switches consist of a DMOS power transistor and a CMOS logic circuitry for complete built-in protection and diagnostic. The latest PROFET™ +2 12V portfolio is the state-of-the-art smart automotive power switch family and capable of driving all kind of resistive, inductive, and capacitive loads ranging from 1 A to 32 A. It includes dedicated derivates with Capacitive Load Switching mode (CLS mode) for high current capacitive loads. With an ISO 26262-compliant 24 V device and the ISO 26262-ready Safety Application Note for PROFET™ +2 12V the families support functional safety.
Infineon´s low-side switches portfolio consists of two product families: HITFET™ (12V and 24V) and TEMPFET™. The HITFET™ family is Infineon's solution for low-side power switch ICs and stands for “Highly Integrated Temperature protected FET.” Their built-in intelligence and protective features offer protection against overload, overvoltage, short-circuit, excessive temperature, and Electrostatic Discharge (ESD). The HITFET™ + family of smart power switches enables easier and safer designs compared to discrete solutions. The TEMPFET™ protected MOSFET power switches provide temperature and indirect current protection via their temperature sensor. The temperature sensor reading is available on external pins to enable flexible temperature response control.
Infineon also offers a wide range of multichannel SPI switches & controllers for automotive and industrial applications:
SPOC™ +2 is the latest generation of highly integrated multichannel serial interface power controllers for automotive and industrial applications providing state-of-the-art diagnostic and protection features. SPOC™ +2 offers a high flexibility with configurable features like slew rate control and intelligent restart strategy to support power distribution. Furthermore, the SPI interface allows to connect multiple devices via daisy-chain configuration to reduce the amount of GPIOs and contribute to save board space. Additionally, the available ISO 26262-ready Safety Application Note (SAN) supports functional safety.
SPIDER products are highly integrated multichannel SPI drivers for low current loads, such as relays & solenoids, LEDs, indicator lamps, small bulbs, and stepper motors. The new SPIDER+ family (TLE75x) offers an improved performance, higher channel flexibility with up to 6 configurable channels, and new channel polarity options such as 8 channel high-side configuration and devices with up to 6 configurable low or high side channels.
FLEX is Infineon´s Multichannel SPI low-side smart power switch family for powertrain, safety, and industrial applications and is specially designed to drive a various range of loads from relays, injector valves, oxygen probe heater, and general purpose solenoids up to uni-polar stepper motors.
Thanks to a rich variety of product families and dedicated derivates, Infineon’s intelligent power devices support the widest possible application spectrum, including automotive 12 V and automotive 24 V commercial, construction and agricultural vehicles (CAV), as well as industrial applications.
The use of intelligent power switches in automotive applications is required to support the global megatrend of autonomous driving to deliver functional safety and diagnostic functions. The power distribution requirements of new automotive board net architectures will be ideally addressed by our smart high-side and low-side switch portfolio.
The PROFET™ + 24V 24 V high-side power driver family is the solution to support the trend of replacing fuses and relays in 24 V systems and vehicles. Our RDS(on) scaled devices with diagnostic and protection functions also address functional safety requirements in CAV applications. The ISO 26262-compliant BTF6070-2ERV reduces the effort for customer to do a functional safety assessment significantly. The newly released smart low-side family HITFET™ + 24V targets 24 V transmission, braking applications, and general low-side switching for these applications.
Industrial applications open up a wide field of use for high-side and low-side switches. Our industrial smart switches are used for industrial automation systems, PLCs (programmable logic controller), digital input/output modules, as well as solar and wind applications and many more.
HITFET™ low-side switches offer a compelling feature set with protection against overtemperature, short circuits and overload conditions. They are also robust against ESD. Infineon recently expanded its portfolio with a new generation of products, named HITFET™ +.
HITFET™ + 12V is Infineon’s new generation of protected low-side switches for automotive and industrial applications. A novel technology enables a significant reduction (of up to 50 percent) in size compared with the existing Classic HITFET™ 12V portfolio. HITFET™ + 12V devices provide the ultimate design flexibility. The family consists of standard (BTS3xxxEJ/TF) and fully featured low-side switches (BTF3xxxEJ/TE) scaling from 11 mΩ to 125 mΩ in two different packages: TO-252 and TDSO-8. These devices are able to switch all kinds of resistive, inductive and capacitive loads.
HITFET™+ 24V, the first fast low-side switch, is capable of driving PWM signals of up to 20 kHz. It comes in a TDSO-8 package, which is five times smaller in size than the competition, thus paving the way for cost and PCB-space savings. A status pin enables the microcontroller to detect and diagnose failures faster. The device also comes with improved temperature protection, and is up to ten times more robust against short circuits.
HITFET™ + 24V is an ideal switch for braking, transmission and compressor systems.
TEMPFET™ devices, with up to 1 MHz switching speeds, provide a first line of protection against temperature and current via their temperature sensors. The temperature sensor is available on external pins, enabling direct access, fast switching and flexible temperature response control.
TEMPFET™ solutions are used in applications that require a minimum level of protection. Even though new designs featuring protected MOSFETs no longer typically focus on TEMPFET™ devices, numerous 12 V and 24 V niche applications continue to require temperature-protected MOSFETs, especially when reliability, robustness and long life are essential.
The highly integrated PROFET™ family (PROtected FET) incorporates a broad range of smart features for advanced diagnostics and protection. PROFET™ intelligent power high-side switches consist of a DMOS power transistor and CMOS logic circuitry for complete built-in protection.
The PROFET™ + 12V family in PG-DSO-8 and PG-DSO-14 exposed pad packages consists of single-, dual- and four-channel protected high-side power switches providing state-of-the-art diagnostics and protection features. The switches are capable of driving loads from 0.5 A up to 10 A, with an RDS(on) from 8 mΩ to 200 mΩ. Their high short-circuit robustness combined with their high switching load capability set a new market benchmark!
Pin compatibility with the PROFET™ + 24V family and across each of the individual family devices is a unique feature of the PROFET™ + 12V family. An identical footprint across packages gives designers maximum freedom, allowing them to quickly and easily change loads and drivers without major modifications to the board layout.
Infineon’s PROFET™ + 24V smart high-side switches are designed for trucks and buses as well as construction and agricultural vehicles (CAV) in harsh environments. This scalable family (12 pin-compatible devices) offers comprehensive protection functions, very fast current sense diagnostics, an extended operating voltage range and high short-circuit robustness. All kinds of loads (inductive, capacitive, resistive) from 0.5 A to 10 A (nom. load current) can be driven.
The portfolio comprises single-, dual- and four-channel devices, all automotive-qualified according to AEC-Q100. The portfolio is rounded out by the BTF6070-2ERV device, which sets a new benchmark for switching speed and supports higher safety requirements (in applications such as ABS, ESP, etc.) thanks to additional ISO 26262 (ASIL B) qualification. Most of the devices come in PG-TDSO-14 packages.
The PROFET™ +2 12V family is Infineon’s latest generation of protected high-side switches (1.2 mΩ to 200 mΩ) in PG-TSDSO-14 exposed pad packages. This family offers single-, dual- and four-channel devices and provides state-of-the-art diagnostics and protection features. All products are qualified for automotive applications according to AEC-Q100 Grade1 or AEC-Q100 Grade0 (Grade0-qualified products are called BTS7xxx-yEPZ). The latest released PROFET™ +2 12V – ESP devices support currents up to 32 A and provide the new feature called Capacitive Load Switching mode.
Moreover, PROFET™ +2 12V provides outstanding energy capability with reduced current consumption, state-of-the-art current sense accuracy (kILIS), benchmark low cranking voltage capability and faster switching/slew rates with no impact on EMC.
Power PROFET™ is a benchmark family of ultra-low-ohmic protected high-side switches (1.0 mΩ to 2.5 mΩ) with integrated protection and diagnostics functions for automotive and 12 V industrial markets. These devices are especially designed to drive high-current loads of 25 to 40 A DC and to replace high-current relays and fuses across 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 Classic PROFET™ portfolio of high-side switches enjoys a solid market reputation for the robust and lasting protection of numerous automotive (12 V/24 V) and industrial applications.
Infineon’s Classic PROFET™ 12 V devices are very versatile protected high-side switches suited to a broad application range extending from automotive (body, powertrain, transmission, chassis, steering) to industrial use cases (robotics, process automation, energy distribution). Some family members come with low current limitation, making them ideal for ADAS loads (cameras, radar, sensors).
All products (single-, dual- and four-channel devices) come with several protection features; most also have a status diagnostic function and some even offer additional current sense diagnostics. High energy robustness, an extended operating voltage range (up to 38 V) and low current limitation are key characteristics of the Classic PROFET™ 12 V family. All kinds of loads (inductive, capacitive, resistive) from 0.2 A to 20 A (nom. load current) can be driven. Various packages (DSO-8, DSO-14, DSO-20, SOT223) and power packages (D2PAK, DPAK) are available.
Infineon’s Classic PROFET™ 24 V family members are highly versatile protected high-side switches targeted at everything from commercial, construction and agricultural vehicles (CAV) – trucks and buses included – to industrial applications (robotics, process automation, energy distribution, etc.).
All products (single-, dual- and four-channel devices) come with several protection features; most also have a status diagnostic function and some even offer additional current sense diagnostics.
High energy robustness, an extended operating voltage range (up to 60 V), low current limitation (high-ohmic products) and high clamping voltages are key characteristics of the Classic PROFET™ 24 V portfolio. All kinds of loads (inductive, capacitive, resistive) from 0.3 A to 25 A (nom. load current) can be switched. Various packages (DSO-8, DSO-14, DSO-20, SOT223) and power packages (D2PAK, DPAK) are available.
The well-established high-side switch Industrial PROFET™ products were designed for targeting a variety of industrial applications which include all types of resistive, inductive and capacitive loads. Due to their outstanding energy robustness, they are perfectly suitable for switching even higher inductive loads and driving relays. Their main application areas include high-voltage applications (VBAT up to 58 V), high-speed PWM applications (up to 1 kHz) and they are most notably capable of switching higher inductances smoothly.
Multichannel SPI Switches & Controller
Infineon’s SPI-driven multichannel serial interface power controller SPOC™ offers a broad range of smart features like diagnostics and protection. Thanks to the Serial Peripheral Interface (SPI), various features can be configured. This configurability gives designers more flexibility and supports the intelligent power distribution trend.
SPOC™ +2 is Infineon’s latest generation of four- and six-channel smart high-side power controllers (5.5 mΩ to 70 mΩ) in PG-TSDSO-24 exposed pad packages. Control, configuration and diagnostics are carried out via the Serial Peripheral Interface (SPI).
Thanks to the SPI, additional configurable features can be applied individually for each channel. In addition to state-of-the-art functions like short circuit and overload protection, SPOC™ +2 offers a configurable overload detection current feature. Moreover, the protection strategy (intelligent restart control or intelligent latch) and the current sense accuracy (kILIS) can be configured individually based on application requirements.
FLEX is Infineon´s Multichannel SPI Low-Side Power Switche family for powertrain, safety and industrial applications is specially designed to drive a various range of loads from relays, injector valves, oxygen probe heater and general purpose solenoids, up to uni-polar stepper motors.
SPIDER products are high integrated multichannel SPI driver for small current loads, such as relays & solenoids, LED’s, small bulbs and stepper motors. SPIDER devices are designed to be used in automotive and industrial applications with dedicated feature sets. The SPIDER family (TLE72x) consists of 4 and 8 channel low-side and 8 channel low-side/ high-side drivers with 2 configurable channels. The new SPIDER+ family (TLE75x) offers an improved performance, higher flexibility (up to 6 configurable channels) and new channel partitionings ( e.g. 8 channel high-side driver) vs SPIDER. To ensure highest functional safety, all 9 devices have a fail safe (Limp Home) and Cranking function implemented. An unique LED- paket, available for high-side and flexible devices, provides additional features for LED and small bulb drive. All devices have small 150 mil packages (exposed pad).