Overview
The L9678PTR, manufactured by STMicroelectronics, is a highly advanced and user-configurable integrated circuit (IC) designed specifically for automotive applications, particularly in airbag and battery cut-off systems. This IC is AEC-Q100 qualified, ensuring it meets the stringent quality and safety standards required for automotive electronics. It features a robust set of functionalities, including energy reserve voltage power supply, high-frequency boost regulators, and multiple linear power supplies, making it an essential component for critical safety systems in vehicles.
Key Specifications
| Parameter | Specification |
|---|---|
| Package Type | 64-pin LQFP (10x10x1.4mm) |
| Operating Voltage | Minimum 6 V |
| Operating Temperature | -40 °C to 95 °C |
| Boost Regulator Frequency | 1.882 MHz |
| Output Voltage | User selectable, 23 V or 33 V ±5% |
| Linear Power Supplies | 5.0 V and 7.2 V ±4% output voltages |
| Linear Regulator | 3.3 V ±4% |
| Deployment Voltage | 25 V maximum |
| Deployment Current | 1.2 A @ 2 ms and 1.75 A @ 0.5/0.7 ms |
| Communication Interface | 32-bit SPI |
| Oscillators | 7.5 MHz and 16 MHz |
| Sensor Interfaces | Four channel hall-effect, resistive or switch sensor interface |
| Remote Sensor Interface | Two channel PSI-5 remote sensor interface (L9678P-S version only) |
Key Features
- AEC-Q100 qualified for automotive applications, ensuring high reliability and quality.
- Energy reserve voltage power supply with a high-frequency boost regulator at 1.882 MHz.
- User-selectable output voltage of 23 V or 33 V ±5% and additional linear power supplies at 5.0 V and 7.2 V ±4%.
- Fully integrated 3.3 V ±4% linear regulator.
- Battery voltage monitor and shutdown control with wake-up control.
- System voltage diagnostics with an integrated ADC.
- Crossover switch with crossover performance of max 3 Ω, 600 mA max.
- Squib/pyroswitch deployment drivers with 4-channel HSD/LSD and current monitoring.
- User customizable safing logic and safing FET test.
- Dual channel configurable high-side/low-side LED driver.
- Watchdog timer and temperature sensor.
- ISO9141 transceiver and 32-bit SPI communications.
Applications
- Low-end airbag systems.
- Cut-off battery systems.
- Pyro Fuse/Pyroswitch management.
- Automotive electronics.
- Industrial automation and control systems.
- Embedded systems and IoT devices.
Q & A
- What is the L9678PTR used for?
The L9678PTR is used in automotive applications, particularly in airbag and battery cut-off systems.
- What are the key features of the L9678PTR?
Key features include a high-frequency boost regulator, user-selectable output voltages, multiple linear power supplies, battery voltage monitoring, and deployment drivers.
- Is the L9678PTR AEC-Q100 qualified?
Yes, the L9678PTR is AEC-Q100 qualified, ensuring it meets stringent automotive quality and safety standards.
- What is the operating temperature range of the L9678PTR?
The operating temperature range is -40 °C to 95 °C.
- What communication interface does the L9678PTR support?
The L9678PTR supports 32-bit SPI communication.
- What types of sensor interfaces are available on the L9678PTR?
The IC includes four channel hall-effect, resistive or switch sensor interfaces and a two channel PSI-5 remote sensor interface (for the L9678P-S version).
- What is the deployment voltage and current capability of the L9678PTR?
The deployment voltage is up to 25 V, with current capabilities of 1.2 A @ 2 ms and 1.75 A @ 0.5/0.7 ms.
- Does the L9678PTR have integrated diagnostics?
Yes, it includes system voltage diagnostics with an integrated ADC and various diagnostic configuration registers.
- What is the package type of the L9678PTR?
The L9678PTR is packaged in a 64-pin LQFP (10x10x1.4mm).
- Is the L9678PTR suitable for industrial applications?
Yes, it is suitable for use in demanding automotive and industrial environments.
