Find the perfect block diagram with our step-by-step guide below. Start by choosing a solution,
then refine your selection as the next fields adapt dynamically to lead you to the final diagram.
Expanded View
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Monitor","path":"/design/interactive-block-diagrams/medical/continuous-glucose-monitor","children":[]},{"id":"f6130e35-4fd0-4719-acac-e3da45c1a9a6_IBD_DIAGRAM","parentId":"232a1fe1-c60b-4a4f-853e-7b73a7209c91_IBD_SUBSOLUTION","text":"Hearing Aid","path":"/design/interactive-block-diagrams/medical/hearing-aid","children":[]},{"id":"a3e4f792-c0dc-4153-bb76-59bbe623ed64_IBD_DIAGRAM","parentId":"232a1fe1-c60b-4a4f-853e-7b73a7209c91_IBD_SUBSOLUTION","text":"Patient Monitor","path":"/design/interactive-block-diagrams/medical/patient-monitor","children":[]},{"id":"fa0c8829-c8b8-426a-8624-fb6406550d0b_IBD_DIAGRAM","parentId":"232a1fe1-c60b-4a4f-853e-7b73a7209c91_IBD_SUBSOLUTION","text":"Ultrasound Transducer","path":"/design/interactive-block-diagrams/medical/ultrasound-transducer","children":[]}]},{"id":"d17e7410-a519-48f1-887a-1644e3a10c78_IBD_SUBSOLUTION","parentId":"9d330931-7485-49dd-ae21-990ea4e17af9_IBD_SOLUTION","text":"Medical Imaging","path":null,"children":[{"id":"7780a3f3-3fe2-4f1c-a8f4-f873ed853c45_IBD_DIAGRAM","parentId":"d17e7410-a519-48f1-887a-1644e3a10c78_IBD_SUBSOLUTION","text":"Digital Radiography","path":"/design/interactive-block-diagrams/medical/digital-radiography","children":[]}]}]}]

Electric Power Steering - Block Diagram

Electric power steering uses electric motors to provide the steering assistance instead of traditional hydraulic systems.

"longDescription": "Detailed Description of Each Block", "blocks": [ { "name": "12V Battery", "function": "Provides the primary power source for the EPS system.", "theory_of_operation": "Supplies a stable 12V DC power to the system.", "interaction": "Feeds power to the Battery Protection block.", "category": "Third party", "connection": [ "Battery Protection" ] }, { "name": "Battery Protection", "function": "Protects the battery from overcurrent, overvoltage, and other electrical faults.", "theory_of_operation": "Uses protective circuits to monitor and control the battery's output.", "interaction": "Receives power from the 12V Battery and sends it to the Protection Switch.", "category": "onsemi", "connection": [ "Protection Switch", "Auxiliary Power" ] }, { "name": "Protection Switch", "function": "Acts as a safeguard to disconnect the power in case of faults.", "theory_of_operation": "Uses electronic switches to interrupt the circuit when necessary.", "interaction": "Receives power from the Battery Protection and sends it to the Power Management and Motor Driver blocks.", "category": "onsemi", "connection": [ "Motor Stage" ] }, { "name": "Auxiliary Power", "connection": ["MCU"], "sub_blocks": [ { "name": "Power Management", "function": "Manages the distribution of power within the EPS system.", "theory_of_operation": "Regulates and distributes power to various components.", "interaction": "Receives power from the Protection Switch and provides power to the MCU and other auxiliary components.", "category": "onsemi", "connection": [] }, { "name": "Power Protection", "function": "Provides additional protection to the power management system.", "theory_of_operation": "Monitors and protects against electrical faults.", "interaction": "Works in conjunction with Power Management to ensure safe power distribution.", "category": "onsemi", "connection": [] } ] }, { "name": "MCU", "function": "Acts as the central processing unit for the EPS system.", "theory_of_operation": "Executes control algorithms and processes sensor data.", "interaction": "Receives power from Power Management and communicates with Motor Driver, Memory, Steering Sensors, and In Vehicle Networking.", "category": "Third party", "connection": [ "Motor Driver", "Protection Switch", "Auxiliary Power", "Communication", "Memory" ] }, { "name": "Motor Driver", "function": "Drives the electric motor by controlling the power supplied to it.", "theory_of_operation": "Uses power electronics to modulate the voltage and current to the motor.", "interaction": "Receives power from the Protection Switch and sends controlled power to the Motor Power Stage.", "category": "onsemi", "connection": [ "Motor Stage" ] }, { "name": "Motor Stage", "connection": ["Motor"], "sub_blocks": [ { "name": "Motor Power Stage", "function": "Provides the necessary power to the electric motor.", "theory_of_operation": "Converts the controlled signals from the Motor Driver into high-power signals for the motor.", "interaction": "Receives signals from the Motor Driver and sends power to the electric motor.", "category": "onsemi", "connection": [] }, { "name": "Phase Isolator", "function": "Isolates different phases of the motor to prevent electrical interference.", "theory_of_operation": "Uses isolation techniques to separate phases.", "interaction": "Works with the Motor Power Stage to ensure clean power delivery to the motor.", "category": "onsemi", "connection": [] } ] }, { "name": "Motor", "function": "Provides the mechanical force for steering assistance.", "theory_of_operation": "Converts electrical energy into mechanical energy.", "interaction": "Receives power from the Motor Power Stage and Phase Isolator.", "category": "Third party", "connection": ["Sensing"] }, { "name": "Communication", "connection": ["MCU"], "sub_blocks": [ { "name": "In Vehicle Networking", "function": "Facilitates communication between the EPS system and other vehicle systems.", "theory_of_operation": "Uses communication protocols to exchange data.", "interaction": "Communicates with the MCU and other vehicle systems.", "category": "onsemi", "connection": [] }, { "name": "ESD Protection", "function": "Protects the system from electrostatic discharge.", "theory_of_operation": "Uses protective circuits to absorb and dissipate static electricity.", "interaction": "Works with In Vehicle Networking to ensure safe communication.", "category": "onsemi", "connection": [] } ] }, { "name": "Memory", "function": "Stores data and control algorithms for the EPS system.", "theory_of_operation": "Uses non-volatile memory to retain information.", "interaction": "Communicates with the MCU.", "category": "onsemi", "connection": ["MCU"] }, { "name": "Steering Sensors", "function": "Detects the position and movement of the steering wheel.", "theory_of_operation": "Uses sensors to measure steering input.", "interaction": "Sends data to the MCU.", "category": "onsemi", "connection": ["MCU"] }, { "name": "Sensing", "connection": ["MCU"], "sub_blocks": [ { "name": "Voltage & Current Sense", "function": "Monitors the voltage and current in the EPS system.", "theory_of_operation": "Uses sensing circuits to measure electrical parameters.", "interaction": "Communicates with the MCU.", "category": "onsemi", "connection": [] }, { "name": "Rotor Position", "function": "Monitors the position of the motor rotor.", "theory_of_operation": "Uses position sensors to detect rotor position.", "interaction": "Communicates with the MCU and the Motor.", "category": "Third party", "connection": [] } ] } ], "interconnections": [ { "source": "12V Battery", "target": "Battery Protection" }, { "source": "Battery Protection", "target": "Protection Switch" }, { "source": "Battery Protection", "target": "Auxiliary Power" }, { "source": "Auxiliary Power", "target": "MCU" }, { "source": "Protection Switch", "target": "Motor Stage" }, { "source": "Motor Stage", "target": "Motor" }, { "source": "Motor", "target": "Sensing" }, { "source": "Sensing", "target": "MCU" }, { "source": "MCU", "target": "Memory" }, { "source": "Memory", "target": "MCU" }, { "source": "Steering Sensors", "target": "MCU" }, { "source": "MCU", "target": "Communication" }, { "source": "Communication", "target": "MCU" } ], "Last_update": "2025-07-30",

Electric Power Steering

Motor Power Stage - Block

Products

  • Low/Medium Voltage MOSFETs
    • NVD5C446N

      Single N-Channel Power MOSFET 40V, 101A, 3.5mΩ

    • NVMFWS1D3N04XM

      Single N-Channel Power MOSFET 40 V, 195A, 1.3 mΩ

    • NVMYS2D4N04C

      Power MOSFET 40 V, 2.4Ω, 130 A, Single N-Channel

    • FDD86367

      N-Channel PowerTrench<sup>®</sup> MOSFET 80 V, 100 A, 4.2 mΩ

    • NVMFS6H801NL

      MOSFET - Power, Single N-Channel, 80 V, 2.7 mΩ, 160 A - NVMFS6H801NL

  • MOSFET Modules
    • NXV08V110DB1

      3-Phase Inverter Automotive Power Module, APM19

    • FTCO3V85A1

      Automotive Power Integrated Module (PIM), 3-Phase, 1.5 kW 48 V-12 V interleaved DC-DC Converter

Technical Documentation

Evaluation Boards/Kits

FAQs

1. Why is electric power steering used instead of hydraulic steering?

Electric power steering is used because it improves efficiency and integration. Unlike hydraulic systems, EPS consumes energy only when assistance is needed, reduces weight and maintenance, and supports software‑controlled steering features required for modern safety and driver assistance systems.

2. How does an electric power steering system works?

An electric power steering system works by using sensors, a control unit, and an electric motor to assist steering. Torque and position sensors detect driver input, while the controller calculates the required assistance and drives the motor to provide smooth, responsive steering support.

3. What are the main components of an electric power steering system?

The main components of an electric power steering system include torque and position sensors, an electronic control unit, a power inverter, and an electric motor. Together, these components measure steering input, process control algorithms, and deliver precise motor assistance to the steering mechanism.

4. What benefits does electric power steering provide?

Electric power steering provides improved fuel efficiency, flexibility, and driving comfort.
It enables variable steering assist, reduces engine load, supports customizable steering feel, and allows integration with advanced driver assistance and automated driving features.

5. How does the onsemi Interactive Block Diagram help me select parts and build a worksheet/BOM?

The onsemi interactive block diagram lets you select a taxonomy, choose devices per block, and download a worksheet. If you need a deeper dive into the tool, watch our tutorial video.

Worksheet (BOM) Preview

Worksheet (BOM)

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