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":[]}]}]}]

Interior Lighting - Block Diagram

Interior LED lighting enhances vehicle cabins with energy-efficient, customizable, and smart illumination solutions for a modern driving experience.

"longDescription": "Detailed Description of Each Block", "blocks": [ { "name": "12V Battery", "function": "Provides primary DC power to the system.", "theory_of_operation": "Stores and supplies 12V DC using electrochemical cells.", "interaction": "Feeds power to Power Protection.", "category": "Third party", "connection": ["Power Protection"] }, { "name": "Power Protection", "function": "Protects downstream circuits from electrical faults.", "theory_of_operation": "Uses components like fuses and TVS diodes to prevent overvoltage, overcurrent, and short circuits.", "interaction": "Supplies protected power to Voltage Regulation.", "category": "onsemi", "connection": ["Voltage Regulation", "LDO"] }, { "name": "Voltage Regulation", "function": "Regulates voltage levels for different subsystems.", "theory_of_operation": "Uses switching regulators or LDOs to maintain stable voltage outputs.", "interaction": "Feeds regulated power to LDO and LED Drivers.", "category": "onsemi", "connection": ["Single-channel Linear LED Driver", "Multi-channel Linear LED Driver"] }, { "name": "LDO", "function": "Provides low-dropout voltage regulation for sensitive components.", "theory_of_operation": "Maintains a stable output voltage with minimal difference from input voltage using linear regulation.", "interaction": "Supplies clean power to MCU and Logic & Memory.", "category": "onsemi", "connection": ["MCU"] }, { "name": "Single-channel Linear LED Driver", "function": "Drives a single LED string with regulated current.", "theory_of_operation": "Controls current flow through one LED string using linear regulation.", "interaction": "Receives power from Voltage Regulation and drives one LED String.", "category": "onsemi", "connection": ["LED String"] }, { "name": "Multi-channel Linear LED Driver", "function": "Drives multiple LED strings independently.", "theory_of_operation": "Provides regulated current to several LED strings using multiple linear channels.", "interaction": "Receives power from Voltage Regulation and drives multiple LED Strings.", "category": "onsemi", "connection": ["LED String"] }, { "name": "LED String", "function": "Emits light when powered by the LED driver.", "theory_of_operation": "LEDs emit photons when forward biased with current.", "interaction": "Receives current from Single-channel or Multi-channel LED Driver.", "category": "Third party", "connection": [] }, { "name": "MCU", "function": "Controls system logic and LED driver behavior.", "theory_of_operation": "Executes firmware to manage LED brightness, timing, and diagnostics.", "interaction": "Interfaces with Communication Interface and Logic & Memory.", "category": "Third party", "connection": ["Communication Interface", "Logic & Memory"] }, { "name": "Communication Interface", "function": "Enables data exchange between MCU and external systems.", "theory_of_operation": "Supports protocols like UART, SPI, or I²C for control and diagnostics.", "interaction": "Connects MCU to external controllers or diagnostic tools.", "category": "onsemi", "connection": ["MCU"] }, { "name": "Logic & Memory", "function": "Stores configuration and operational data.", "theory_of_operation": "Includes volatile and non-volatile memory for temporary and persistent data storage.", "interaction": "Supports MCU operations and LED driver control logic.", "category": "onsemi", "connection": ["MCU"] } ], "interconnections": [ {"source": "12V Battery", "target": "Power Protection"}, {"source": "Power Protection", "target": "Voltage Regulation"}, {"source": "Power Protection", "target": "LDO"}, {"source": "Voltage Regulation", "target": "Single-channel Linear LED Driver"}, {"source": "Voltage Regulation", "target": "Multi-channel Linear LED Driver"}, {"source": "Single-channel Linear LED Driver", "target": "LED String"}, {"source": "Multi-channel Linear LED Driver", "target": "LED String"}, {"source": "LDO", "target": "MCU"}, {"source": "MCU", "target": "Communication Interface"}, {"source": "MCU", "target": "Logic & Memory"}, {"source": "Communication Interface", "target": "MCU"}, {"source": "Logic & Memory", "target": "MCU"} ], "Last_update": "2025-08-26"

Interior Lighting

Single-channel Linear LED Driver - Block

Products

  • General Purpose and Low VCE(sat) Transistors
    • NSS40201L

      Low V<sub>CE(sat)</sub> Transistor, NPN, 40 V, 2.0 A

    • NSS40301CT

      40 V, 3.0A Low VCE(sat) NPN Transistor

    • BCH817

      +175°C T<sub>J(MAX)</sub> NPN Bipolar Transistor

  • Linear LED Drivers
    • NSI45060JD

      LED Driver, Adjustable Constant Current Regulator, 45 V, 60 - 100 mA

    • NUD4001

      LED Driver, High Current

    • NCV7692

      Current Controller for Automotive LED Lamps

  • Zener Diodes
    • 1SMA59

      1.5 W Zener Diode Voltage Regulator

    • SZMMSZ52

      Zener Diode 500 mW SOD-123

    • MMSZ4

      Low Current Zener Diode Voltage Regulator

Technical Documentation

Evaluation Boards/Kits

  • CCRGEVB

    Constant Current Regulator Array Evaluation Board

  • LOWVOLTAGEP2SGEVB

    Three LED Low Voltage Parallel-to-Series Lighting Circuit

  • NCV7692DRLV1GEVB

    NCV7692DRLV1GEVB High-current Daylight Running Light Evaluation Board

  • NUD4001DGEVB

    LED Driver Revision A Evaluation Board

FAQs

1. What are the main benefits of LED interior lighting in vehicles?

LED interior lighting offers high energy efficiency, long lifetime, and flexible color control. These benefits allow manufacturers to reduce power consumption, enable customizable cabin experiences, and improve overall vehicle aesthetics while maintaining reliability across automotive temperature and voltage conditions.

2. How does ambient interior lighting enhance the user experience?

Ambient interior lighting enhances the user experience by creating a comfortable and personalized cabin environment. Adjustable brightness and color settings support mood lighting, improve perceived quality, and help visually separate functional areas without distracting the driver.

3. Why are LED drivers important in interior lighting designs?

LED drivers are important because they regulate current precisely to ensure uniform brightness and consistent color. They also protect LEDs from electrical stress and support features such as dimming and color mixing, which are essential for advanced interior lighting effects.

4. What challenges do engineers face when designing interior lighting?

Engineers face challenges such as EMI control, thermal management, scalability, and cost optimization. Interior lighting systems must integrate seamlessly with vehicle electronics while supporting multiple lighting zones, diagnostic capabilities, and long-term reliability.

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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