Overview
The NCV7471BDQ5R2G, produced by onsemi, is a System Basis Chip (SBC) designed for automotive Electronic Control Units (ECUs) in the body domain. This chip integrates multiple functions essential for automotive applications, including power management, communication interfaces, and monitoring capabilities. It ensures safe power-up sequences, monitors low-voltage power supplies, and includes high-speed CAN/CANFD and LIN transceivers. The NCV7471BDQ5R2G is AEC-Q100 qualified and RoHS compliant, making it suitable for demanding automotive environments.
Key Specifications
| Parameter | Description |
|---|---|
| Package Type | 36-SSOP (Surface Mount) |
| Power Supplies | 5 V VOUT from DC/DC Converter (up to 500 mA, ±2% accuracy), 5 V VOUT2 Low-drop Output Regulator (up to 50 mA), 11 V (NCV7471B) or 6.5 V (NCV7471C) V_MID Supply from DC/DC Converter |
| Communication Interfaces | High-speed CAN/CANFD Transceiver (ISO11898-2:2016 compliant, up to 1 Mbps), Two LIN Transceivers (ISO17987-4, LIN2.X, and J2602 compliant) |
| Serial Interface | Serial Peripheral Interface (SPI) with 16-bit frames, accessible through eight 12-bit registers |
| Protection and Monitoring | Monitoring of main supply and VOUT supply output, thermal warning and thermal shutdown protection, programmable watchdog |
| Wake-up Input | Edge-sensitive high-voltage input (WU) for wake-up or logical input polled through SPI |
| Fail-Safe Outputs | Three fail-safe outputs (FSO1, FSO2, FSO3) with different signal patterns for fail-safe indication |
Key Features
- Ensures safe power-up sequence and mode transitions, including power management and wake-up treatment (bus wakeups, local wakeups, and cyclic wakeups)
- High-speed CAN/CANFD transceiver compliant with ISO11898-2:2016, supporting up to 1 Mbps communication speed
- Two LIN transceivers compliant with ISO17987-4, LIN2.X, and J2602 standards
- Boost-buck DC/DC converter with 5 V VOUT and 5 V VOUT2 low-drop output regulator
- Serial Peripheral Interface (SPI) for communication with the ECU’s microcontroller, accessing mode settings, chip status feedback, and watchdog
- Protection against short to the car battery and thermal shutdown protection
- AEC-Q100 qualified and RoHS compliant, Pb-free, halogen-free/BFR-free
Applications
The NCV7471BDQ5R2G is primarily designed for automotive Electronic Control Units (ECUs) in the body domain. It is suitable for various automotive applications, including:
- Body control modules
- Infotainment systems
- Safety and security systems
- Gateway units for multiple communication nodes
Q & A
- What is the primary function of the NCV7471BDQ5R2G?
The NCV7471BDQ5R2G is a System Basis Chip (SBC) that integrates functions typically found in automotive Electronic Control Units (ECUs), including power management, communication interfaces, and monitoring capabilities.
- What communication interfaces does the NCV7471BDQ5R2G support?
The chip supports high-speed CAN/CANFD and two LIN transceivers.
- What is the role of the DC/DC converter in the NCV7471BDQ5R2G?
The DC/DC converter provides a 5 V VOUT supply and a 5 V VOUT2 low-drop output regulator, along with an 11 V (NCV7471B) or 6.5 V (NCV7471C) V_MID supply.
- How does the NCV7471BDQ5R2G ensure safe power-up sequences?
The chip includes control logic that ensures safe power-up sequences and mode transitions, including power management and wake-up treatment.
- What is the purpose of the SPI interface in the NCV7471BDQ5R2G?
The SPI interface allows communication with the ECU’s microcontroller, accessing mode settings, chip status feedback, and watchdog functions.
- What kind of protection does the NCV7471BDQ5R2G offer?
The chip offers thermal warning and thermal shutdown protection, as well as monitoring of the main supply and VOUT supply output.
- Is the NCV7471BDQ5R2G compliant with automotive standards?
Yes, the NCV7471BDQ5R2G is AEC-Q100 qualified and RoHS compliant.
- What is the wake-up input (WU) used for in the NCV7471BDQ5R2G?
The wake-up input (WU) is an edge-sensitive high-voltage input that can be used as a wake-up source or as a logical input polled through SPI.
- How many fail-safe outputs does the NCV7471BDQ5R2G have?
The chip has three fail-safe outputs (FSO1, FSO2, FSO3) with different signal patterns for fail-safe indication.
- What is the typical application of the NCV7471BDQ5R2G in automotive systems?
The NCV7471BDQ5R2G is typically used in body control modules, infotainment systems, safety and security systems, and as gateway units for multiple communication nodes.
