onsemi FAD1110EVB Driver Evaluation Board
onsemi FAD1110EVB Driver Evaluation Board is a compact, ready-to-use hardware platform designed to evaluate the performance and functionality of the FAD1110 automotive ignition driver IC in realistic ignition-coil applications. The board integrates the FAD1110 device with an ignition IGBT and all essential application circuitry, providing a complete solution for evaluating coil charging behavior, programmable dwell-time control, current limiting via the VSENSE input, and the device’s timing-based protection features. These features enable fast and efficient validation of ignition driver operation without the need for additional external hardware.
The FAD1110EVB enables detailed observation of the device’s differential input stage, which includes built-in spike filtering and ground-shift tolerance, ensuring robust triggering in harsh automotive electrical environments. The evaluation board also demonstrates how the Hard Shut Down (HSD) mechanism immediately disables the ignition IGBT when the system exceeds the programmed maximum dwell time. This action protects the system from thermal overload and unintended spark events.
The board's design prioritizes the safe handling of ignition-level voltage transients. The PCB layout incorporates enhanced creepage and clearance spacing in accordance with IPC 2221A guidelines, and critical signals, including the differential inputs, OUTPUT gate drive, VSENSE current limit node, and CSSD timing pin, are accessible via clearly labeled connectors and oscilloscope test points.
The onsemi FAD1110EVB supports evaluation with a wide range of ignition coils or equivalent inductive loads and is suitable for both bench-level characterization and system-level testing. In addition to functional evaluation, the board serves as a reference design to support customer implementation of the FAD1110 ignition gate driver in production automotive ignition systems.
Features
- Supports evaluation of the FAD1110 automotive ignition driver IC
- Integrated ignition IGBT with complete application circuitry for coil-on-plug systems
- 12V battery level supply input with reverse polarity protection
- Two supply connectors for flexible powering during evaluation
- Differential ignition trigger input (INH / INL) with built-in spike filtering and ground shift tolerance from +2V to +3V
- Supports both differential and single-ended input operation modes
- Configurable current sense and current limit network via VSENSE
- Programmable maximum dwell time using external CSSD capacitor
- Timing-based Hard Shut Down (HSD) protection to prevent extended dwell and thermal overstress
- Oscilloscope test points on key signals (inputs, OUTPUT, VSENSE, CSSD)
- LED indicator for VBAT supply presence
- Supports connection to ignition coils or equivalent inductive loads
- Enhanced high voltage creepage and clearance spacing per IPC 2221A guidelines for safe handling of ignition level transients
- Header for stacking multiple boards or integration into larger evaluation setups
Applications
- Automotive ignition systems for gasoline engines
- Coil on plug (COP) ignition architectures
- Distributorless ignition systems (DIS)
- Automotive ignition gate driver evaluation and validation
- Dwell time control and timing supervision characterization
- Ignition current limit behavior analysis using VSENSE
- Evaluation of hard shutdown (HSD) protection in ignition systems
- Automotive ECU and ignition module development
- Reference design and prototyping for ignition control electronics
Schematic
