Overview
The L9679BATR, produced by STMicroelectronics, is an advanced integrated circuit designed specifically for airbag systems and pyroswitch management. This device is part of the L9679 family and is AEC-Q100 qualified, ensuring it meets the stringent requirements for automotive applications. It integrates multiple functionalities, including deployment drivers, remote sensor interfaces, and comprehensive diagnostics, making it a critical component in safety-critical automotive systems.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 100LQFP (7 x 7 x 1.0 mm with 5x5 mm exposed pad down) |
| Operating Temperature | -40 °C to 105 °C |
| Deployment Drivers | 8 high-side and 8 low-side drivers, 1.20 A or 1.75 A minimum current, up to 25 V deployment voltage |
| Remote Sensor Interface | Four-channel PSI-5 satellite sensors, asynchronous/synchronous protocols, 125 k or 189 kbps |
| Communication Interface | 32-bit SPI, two SPI buses (global and remote sensor communication) |
| Power Supply | VCC (5.5 V max), VSAT, VSYNC, internal 3.3 V regulators (CVDD and VINT3V3) |
| Diagnostics | Current monitoring, FET tests, open and shorts diagnostics, thermal shutdown protection |
Key Features
- Deployment Drivers: 8 high-side and 8 low-side deployment drivers with programmable deployment options and current monitoring.
- Remote Sensor Interface: Four-channel PSI-5 satellite sensor interface with configurable asynchronous/synchronous protocols and error detection.
- Communication: Dual 32-bit SPI buses for global and remote sensor configuration and control.
- Power Management: Integrated power management system with internal 3.3 V regulators and external supply options.
- Diagnostics: Comprehensive diagnostics including FET tests, open and shorts diagnostics, and thermal shutdown protection.
- Arming Logic: Three discrete and independent input arming signals.
Applications
- Airbag Systems: The L9679BATR is specifically designed for use in airbag systems, managing the deployment of airbags and ensuring reliable operation.
- Pyroswitch Management: It also manages pyroswitches, which are critical in various automotive safety systems.
- Cut-off Battery Systems: The device can be used in battery cut-off systems, enhancing the overall safety and reliability of the vehicle’s electrical system.
Q & A
- What is the L9679BATR used for? The L9679BATR is used in airbag systems and pyroswitch management in automotive applications.
- What is the operating temperature range of the L9679BATR? The operating temperature range is -40 °C to 105 °C.
- How many deployment drivers does the L9679BATR have? It has 8 high-side and 8 low-side deployment drivers.
- What type of remote sensor interface does the L9679BATR support? It supports a four-channel PSI-5 satellite sensor interface.
- What communication interfaces are available on the L9679BATR? It has two 32-bit SPI buses for global and remote sensor communication.
- What power supply options are available for the L9679BATR? It includes VCC, VSAT, VSYNC, and internal 3.3 V regulators.
- What diagnostics capabilities does the L9679BATR have? It includes current monitoring, FET tests, open and shorts diagnostics, and thermal shutdown protection.
- Is the L9679BATR AEC-Q100 qualified? Yes, it is AEC-Q100 qualified, ensuring it meets automotive standards.
- What are the typical applications of the L9679BATR? It is used in airbag systems, pyroswitch management, and cut-off battery systems.
- How does the L9679BATR manage power? It has an integrated power management system with internal regulators and external supply options.
