Overview
The L9679P, produced by STMicroelectronics, is a highly advanced integrated circuit designed for use in automotive airbag systems and cut-off battery systems. This IC is specifically tailored for mid to high-end applications, ensuring robust and reliable performance in critical safety systems. It is AEC-Q100 qualified, which guarantees its compliance with stringent automotive standards.
Key Specifications
| Specification | Details |
|---|---|
| Operating Frequency | 1.882 MHz |
| Maximum Load Current | 55 mA |
| Output Voltage (Boost Regulator) | User selectable: 23 V / 33 V ±5%, 12 V / 14.75 V |
| Output Voltage (Buck Regulator for Remote Sensor) | User configurable: 7.2 V / 9 V ±4% |
| Output Voltage (Buck Regulator for MCU) | User selectable: 3.3 V or 5.0 V ±3% |
| Deployment Voltage | Up to 25 V |
| Operating Temperature | -40 to 95 °C |
| Minimum Operating Voltage | 5.5 V at device battery pin |
| Packaging | TQFP100 exposed pad down (14x14x1.0mm) |
Key Features
- Boost regulator for energy reserve with user-selectable output voltage.
- Boost regulator for PSI-5 SYNC pulse with configurable output voltage.
- Buck regulators for remote sensor and microcontroller unit with user-configurable output voltages.
- Integrated energy reserve crossover switch and switch active output indicator.
- Battery voltage monitor and shutdown control with wake-up control.
- System voltage diagnostics with integrated ADC.
- Squib/pyroswitch deployment drivers with various deployment profiles and current monitoring.
- High side safing switch regulator and enable control.
- Remote sensor interface for PSI-5 satellite sensors.
- General Purpose Output (GPO) channels with PWM control.
- Hall-effect, resistive, or switch sensor interfaces.
- User customizable safing logic and specific disarm signal for passenger airbag.
- Temporal and algorithmic Watchdog timers.
- End of life disposal interface and temperature sensor.
- 32-bit SPI communications.
Applications
- Mid to high-end airbag systems.
- Cut-off battery systems.
- Pyro Fuse/Pyroswitch management.
Q & A
- What is the L9679P used for?
The L9679P is used in advanced airbag systems and cut-off battery systems for automotive applications.
- What are the key features of the L9679P?
The L9679P includes boost and buck regulators, energy reserve crossover switch, battery voltage monitor, system voltage diagnostics, squib/pyroswitch deployment drivers, and various sensor interfaces.
- What is the operating frequency of the L9679P?
The operating frequency of the L9679P is 1.882 MHz.
- What are the output voltage options for the boost regulator?
The boost regulator output voltage can be user-selected between 23 V / 33 V ±5% and 12 V / 14.75 V.
- What is the maximum load current for the boost regulator?
The maximum load current for the boost regulator is 55 mA.
- What is the operating temperature range of the L9679P?
The operating temperature range is -40 to 95 °C.
- What type of packaging does the L9679P use?
The L9679P is packaged in a TQFP100 exposed pad down (14x14x1.0mm).
- Is the L9679P AEC-Q100 qualified?
Yes, the L9679P is AEC-Q100 qualified.
- What communication interface does the L9679P support?
The L9679P supports 32-bit SPI communications.
- What are some of the deployment features of the L9679P?
The L9679P includes squib/pyroswitch deployment drivers with various deployment profiles and current monitoring.
