SPOC™ +2 | Multichannel SPI high-side power

SPOC™ +2 delivers per-channel SPI-configurable protection and RDS(ON) from 5.5 mΩ to 70 mΩ for multichannel high-side switching in automotive systems.

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Overview

SPOC™ +2 is the latest generation of software configurable multichannel high-side serial interface power controllers for automotive and industrial applications based on SMART7 technology. Control, configuration and diagnostics of the SPOC™ +2 devices are carried out via Serial Peripheral Interface (SPI).

Key Features

  • RDS(on) range 5.5-70 mΩ
  • Up to 28 V operating voltage
  • Up to 6 channels
  • Automotive Qualified, AEC-Q100
  • ISO 26262-ready
  • 8- bit SPI interface
  • Channel parallelization
  • Configurable protection
  • Analog current sense (2 ranges)
  • Limp home mode
  • Adjustable slew rate
  • Integrated GND diode & reverse ON

Products

About

4- and 6-channel devices from 5.5 mΩ to 70 mΩ

SPOC™ +2 are multichannel SPI high-side power controllers and the latest generation of the Infineon SPOC™ family, designed for automotive power distribution, exterior and interior lighting, door locks, seat heating, and sensor supply. The SPOC™ +2 generation doubles the supported current range compared to its predecessor, from 1.5 A to 7 A to 1.5 A to 14 A per channel, while maintaining the same pin-out logic and a unified TSDSO-24 exposed-pad package across all variants.

The family spans 4-channel and 6-channel devices with on-state resistance from 5.5 mΩ to 70 mΩ and a package footprint of 51.9 mm². All devices support PWM over SPI and the ReverseOn feature, and include limp home mode for fail-safe operation. A common SPI software concept and identical package footprint enable design flexibility when switching between family members without PCB layout changes.

SPOC™ +2 devices are qualified for automotive applications and replace electromechanical relays, fuses, and discrete circuits in body control modules (BCMs), junction boxes, and power distribution units.

Automotive Power Distribution Unit (PDU)

Per-channel configurable protection, slew rate, and current sense

Per-channel software configurability: SPOC™ +2 allows slew rate, overload detection current, and KILIS factor to be configured individually for each channel via SPI.

Channel parallelization for higher current loads: Two channels can drive one load in parallel, extending the supported current range to 14 A without a higher-rated discrete switch.

Integrated ground network diode: An integrated diode eliminates the need for an external diode and allows the ground resistor to be reduced from 100 Ω to 47 Ω, simplifying PCB layout and reducing component count.

Cranking voltage operation down to 3.1 V: SPOC™ +2 maintains operation during cranking events with a minimum supply voltage of 3.1 V, meeting severe reverse battery requirements without additional circuitry.

Common SPI software concept across the family: All SPOC™ +2 products use a common SPI register map and diagnosis concept, enabling full software reuse when changing channel count or RDS(ON) variant, reducing firmware development time for late OEM requirement changes.

RDS(ON), channel count, KILIS, operating voltage, and load current

On-state resistance (RDS(ON)): RDS(ON) is the drain-to-source resistance when the channel is fully on. Lower RDS(ON) reduces conduction losses and heat dissipation. SPOC™ +2 covers 5.5 mΩ to 70 mΩ per channel depending on the variant.

Channel count: Defines how many independent loads a single device controls. SPOC™ +2 is available in 4-channel and 6-channel configurations, reducing IC count in power distribution systems.

KILIS (current sense ratio): The ratio between load current and sense current output, determining proportional current sensing accuracy for overload detection. In SPOC™ +2, KILIS is software-configurable per channel via SPI.

Nominal load current (IL): Defines the continuous current each channel can carry. SPOC™ +2 supports 1.5 A to 14 A per channel (or per parallelized pair), covering LED and sensor supply up to seat heating loads.

Operating voltage (VS): SPOC™ +2 operates from a 3.3 V to 5 V logic supply for 12 V automotive battery systems, including cranking events down to 3.1 V.

AEC-Q100 automotive qualification and ISO 26262-ready safety support

  • Automotive qualification (AEC-Q100): SPOC™ +2 is qualified to Automotive Electronics Council Q100 (AEC-Q100) standards
  • ISO 26262 functional safety support: A Safety Application Note (SAN) is available to registered Infineon partners via the myICP portal to support ISO 26262 Functional Safety (FuSa) system-level safety analysis.
  • Configurable protection with intelligent restart or direct latch: Short-circuit, overcurrent, and temperature protection are available on all channels. The overload detection threshold is software-configurable per channel, with response set to intelligent restart or direct latch.
  • Enhanced diagnosis functions: SPOC™ +2 provides open-load detection in ON and OFF states, short-circuit to battery and ground detection via SPI, and proportional load current sense output (IS) for real-time monitoring.
  • Package thermal performance: All devices use the TSDSO-24 exposed-pad package (51.9 mm²) with a thermal path through the exposed pad to the PCB.
ISO 26262 - Functional Safety (FuSa)
Go to myICP

Power distribution in BCMs, junction boxes, and zone controllers

Automotive exterior and interior lighting: SPOC™ +2 controls halogen bulb loads (up to 65 W per channel on BTS72220-4ESA) and LED loads. The configurable slew rate and KILIS factor allow the same device to drive both load types without hardware changes, reducing distinct IC count in a lighting ECU.

Body control module (BCM) power distribution: In BCMs and zone control units, SPOC™ +2 replaces electromechanical relays, fuses, and discrete circuits. SPI daisy-chain capability allows multiple SPOC™+2 devices to be controlled from a single microcontroller SPI port, reducing wiring complexity in high-channel-count BCM designs.

Junction box and fuse box switching: SPOC™ +2 provides per-channel software-configurable protection and diagnosis, enabling the ECU to monitor and protect each load independently. The integrated ground network diode simplifies PCB ground network design in multi-device junction box layouts.

E-bike power distribution: SPOC™ +2 is also suitable for e-bike power distribution applications requiring high-side switching with diagnosis and embedded protection for resistive, inductive, and capacitive loads.

Zone Control Unit (ZCU)
E-bike solutions

Five steps from load requirements to device selection

Step 1: Determine the number of channels required.

Choose the 4-channel variant (BTS72220, BTS71220, BTS71040) for up to four loads, or the 6-channel variant (BTS71033) for up to six. If two channels drive one load in parallel, account for this in your channel budget.

Step 2: Select RDS(ON) based on load current and thermal budget.

SPOC™ +2 offers RDS(ON) from 5.5 mΩ (BTS72220, high-current channels) to 70 mΩ (BTS71033, low-current channels). Verify power dissipation is within TSDSO-24 thermal limits in your PCB layout.

Step 3: Confirm load type and configure slew rate.

Identify whether each channel drives a resistive (bulb), inductive, or capacitive (LED) load. Configure slew rate per channel via SPI to control inrush current and reduce EMI.

Step 4: Verify operating voltage and cranking requirements.

Confirm the logic supply range and 12 V battery voltage are compatible with your ECU. Verify the minimum VS specification against your cranking voltage profile.

Step 5: Assess functional safety requirements.

If ISO 26262 compliance is required, request the Safety Application Note (SAN) via the myICP portal and confirm the supported ASIL level before device selection.

Ask the community

DMOS power stage, common SPI platform, and longevity program

·       Very low ohmic DMOS power stage: SPOC™ +2 uses a DMOS (Double-Diffused Metal-Oxide Semiconductor) power stage technology that achieves RDS(ON) values from 5.5 mΩ per channel. The DMOS process is optimized for the combination of low on-state resistance and robust protection integration in a single automotive-grade device.

·       Common SPI platform across the SPOC™ +2 family: All SPOC™ +2 devices share a common SPI register map, pin-out logic, and TSDSO-24 package footprint. A PCB designed for one SPOC™+2 variant can accommodate other family members without layout changes, reducing re-qualification effort when OEM requirements change late in the design cycle.

·       Smart Power longevity program: SPOC™ +2 is covered by Infineon's Smart Power longevity program, which provides long-term product availability commitments for automotive customers.

·       Automotive development process and quality standards: SPOC™ +2 is developed according to Infineon's automotive development process, supporting AEC-Q100 qualification and ISO 26262 functional safety analysis via the Safety Application Note (SAN) available to registered Infineon partners.

Smart power longevity program

Cross-reference search and chipset pairing tools

Infineon offers a range of design-in materials, which include application notes, evaluation boards, PCB design data, simulation models, and also online simulations. Those materials can be found on each product page in chapter "Design Support".  In addition, we offer a dedicated tool suite for smart power switches and gate driver ICs for automotive power distribution.

Infineon Smart Power Switches and Gate Driver Tool Suite support system architects and hardware designers from the idea to the realization. This suite allows the user to select the right smart power switch or gate driver IC for a specific load using one of the “Finder and Selection” tools. Together with the different “Simulation and Modeling” tools, various application scenarios can be simulated for the respective product. The results can be documented in the report tool and verified with the “Configuration” tools plus the corresponding evaluation boards.

Facing a design challenge? The Infineon Developer Community is available 24/7 for you to connect and network with engineers across the globe. Get help from Infineon support engineers and expert members to solve your design challenges anytime and from anywhere.

Tool suite
Smart power switch finder

4- and 6-channel devices from 5.5 mΩ to 70 mΩ

SPOC™ +2 are multichannel SPI high-side power controllers and the latest generation of the Infineon SPOC™ family, designed for automotive power distribution, exterior and interior lighting, door locks, seat heating, and sensor supply. The SPOC™ +2 generation doubles the supported current range compared to its predecessor, from 1.5 A to 7 A to 1.5 A to 14 A per channel, while maintaining the same pin-out logic and a unified TSDSO-24 exposed-pad package across all variants.

The family spans 4-channel and 6-channel devices with on-state resistance from 5.5 mΩ to 70 mΩ and a package footprint of 51.9 mm². All devices support PWM over SPI and the ReverseOn feature, and include limp home mode for fail-safe operation. A common SPI software concept and identical package footprint enable design flexibility when switching between family members without PCB layout changes.

SPOC™ +2 devices are qualified for automotive applications and replace electromechanical relays, fuses, and discrete circuits in body control modules (BCMs), junction boxes, and power distribution units.

Automotive Power Distribution Unit (PDU)

Per-channel configurable protection, slew rate, and current sense

Per-channel software configurability: SPOC™ +2 allows slew rate, overload detection current, and KILIS factor to be configured individually for each channel via SPI.

Channel parallelization for higher current loads: Two channels can drive one load in parallel, extending the supported current range to 14 A without a higher-rated discrete switch.

Integrated ground network diode: An integrated diode eliminates the need for an external diode and allows the ground resistor to be reduced from 100 Ω to 47 Ω, simplifying PCB layout and reducing component count.

Cranking voltage operation down to 3.1 V: SPOC™ +2 maintains operation during cranking events with a minimum supply voltage of 3.1 V, meeting severe reverse battery requirements without additional circuitry.

Common SPI software concept across the family: All SPOC™ +2 products use a common SPI register map and diagnosis concept, enabling full software reuse when changing channel count or RDS(ON) variant, reducing firmware development time for late OEM requirement changes.

RDS(ON), channel count, KILIS, operating voltage, and load current

On-state resistance (RDS(ON)): RDS(ON) is the drain-to-source resistance when the channel is fully on. Lower RDS(ON) reduces conduction losses and heat dissipation. SPOC™ +2 covers 5.5 mΩ to 70 mΩ per channel depending on the variant.

Channel count: Defines how many independent loads a single device controls. SPOC™ +2 is available in 4-channel and 6-channel configurations, reducing IC count in power distribution systems.

KILIS (current sense ratio): The ratio between load current and sense current output, determining proportional current sensing accuracy for overload detection. In SPOC™ +2, KILIS is software-configurable per channel via SPI.

Nominal load current (IL): Defines the continuous current each channel can carry. SPOC™ +2 supports 1.5 A to 14 A per channel (or per parallelized pair), covering LED and sensor supply up to seat heating loads.

Operating voltage (VS): SPOC™ +2 operates from a 3.3 V to 5 V logic supply for 12 V automotive battery systems, including cranking events down to 3.1 V.

AEC-Q100 automotive qualification and ISO 26262-ready safety support

  • Automotive qualification (AEC-Q100): SPOC™ +2 is qualified to Automotive Electronics Council Q100 (AEC-Q100) standards
  • ISO 26262 functional safety support: A Safety Application Note (SAN) is available to registered Infineon partners via the myICP portal to support ISO 26262 Functional Safety (FuSa) system-level safety analysis.
  • Configurable protection with intelligent restart or direct latch: Short-circuit, overcurrent, and temperature protection are available on all channels. The overload detection threshold is software-configurable per channel, with response set to intelligent restart or direct latch.
  • Enhanced diagnosis functions: SPOC™ +2 provides open-load detection in ON and OFF states, short-circuit to battery and ground detection via SPI, and proportional load current sense output (IS) for real-time monitoring.
  • Package thermal performance: All devices use the TSDSO-24 exposed-pad package (51.9 mm²) with a thermal path through the exposed pad to the PCB.
ISO 26262 - Functional Safety (FuSa)
Go to myICP

Power distribution in BCMs, junction boxes, and zone controllers

Automotive exterior and interior lighting: SPOC™ +2 controls halogen bulb loads (up to 65 W per channel on BTS72220-4ESA) and LED loads. The configurable slew rate and KILIS factor allow the same device to drive both load types without hardware changes, reducing distinct IC count in a lighting ECU.

Body control module (BCM) power distribution: In BCMs and zone control units, SPOC™ +2 replaces electromechanical relays, fuses, and discrete circuits. SPI daisy-chain capability allows multiple SPOC™+2 devices to be controlled from a single microcontroller SPI port, reducing wiring complexity in high-channel-count BCM designs.

Junction box and fuse box switching: SPOC™ +2 provides per-channel software-configurable protection and diagnosis, enabling the ECU to monitor and protect each load independently. The integrated ground network diode simplifies PCB ground network design in multi-device junction box layouts.

E-bike power distribution: SPOC™ +2 is also suitable for e-bike power distribution applications requiring high-side switching with diagnosis and embedded protection for resistive, inductive, and capacitive loads.

Zone Control Unit (ZCU)
E-bike solutions

Five steps from load requirements to device selection

Step 1: Determine the number of channels required.

Choose the 4-channel variant (BTS72220, BTS71220, BTS71040) for up to four loads, or the 6-channel variant (BTS71033) for up to six. If two channels drive one load in parallel, account for this in your channel budget.

Step 2: Select RDS(ON) based on load current and thermal budget.

SPOC™ +2 offers RDS(ON) from 5.5 mΩ (BTS72220, high-current channels) to 70 mΩ (BTS71033, low-current channels). Verify power dissipation is within TSDSO-24 thermal limits in your PCB layout.

Step 3: Confirm load type and configure slew rate.

Identify whether each channel drives a resistive (bulb), inductive, or capacitive (LED) load. Configure slew rate per channel via SPI to control inrush current and reduce EMI.

Step 4: Verify operating voltage and cranking requirements.

Confirm the logic supply range and 12 V battery voltage are compatible with your ECU. Verify the minimum VS specification against your cranking voltage profile.

Step 5: Assess functional safety requirements.

If ISO 26262 compliance is required, request the Safety Application Note (SAN) via the myICP portal and confirm the supported ASIL level before device selection.

Ask the community

DMOS power stage, common SPI platform, and longevity program

·       Very low ohmic DMOS power stage: SPOC™ +2 uses a DMOS (Double-Diffused Metal-Oxide Semiconductor) power stage technology that achieves RDS(ON) values from 5.5 mΩ per channel. The DMOS process is optimized for the combination of low on-state resistance and robust protection integration in a single automotive-grade device.

·       Common SPI platform across the SPOC™ +2 family: All SPOC™ +2 devices share a common SPI register map, pin-out logic, and TSDSO-24 package footprint. A PCB designed for one SPOC™+2 variant can accommodate other family members without layout changes, reducing re-qualification effort when OEM requirements change late in the design cycle.

·       Smart Power longevity program: SPOC™ +2 is covered by Infineon's Smart Power longevity program, which provides long-term product availability commitments for automotive customers.

·       Automotive development process and quality standards: SPOC™ +2 is developed according to Infineon's automotive development process, supporting AEC-Q100 qualification and ISO 26262 functional safety analysis via the Safety Application Note (SAN) available to registered Infineon partners.

Smart power longevity program

Cross-reference search and chipset pairing tools

Infineon offers a range of design-in materials, which include application notes, evaluation boards, PCB design data, simulation models, and also online simulations. Those materials can be found on each product page in chapter "Design Support".  In addition, we offer a dedicated tool suite for smart power switches and gate driver ICs for automotive power distribution.

Infineon Smart Power Switches and Gate Driver Tool Suite support system architects and hardware designers from the idea to the realization. This suite allows the user to select the right smart power switch or gate driver IC for a specific load using one of the “Finder and Selection” tools. Together with the different “Simulation and Modeling” tools, various application scenarios can be simulated for the respective product. The results can be documented in the report tool and verified with the “Configuration” tools plus the corresponding evaluation boards.

Facing a design challenge? The Infineon Developer Community is available 24/7 for you to connect and network with engineers across the globe. Get help from Infineon support engineers and expert members to solve your design challenges anytime and from anywhere.

Tool suite
Smart power switch finder
Documents

Design resources

Developer community