Overview
The L9788TR, produced by STMicroelectronics, is a multifunction integrated circuit (IC) specifically designed for automotive engine management systems. This device is engineered using ST's proprietary BCD (Bipolar-CMOS-DMOS) technology and is qualified to meet the stringent requirements of AEC-Q100 and ISO26262 compliance. It provides a comprehensive set of power supplies and signal preprocessing peripherals necessary for controlling a 4-cylinder internal combustion engine.
Key Specifications
| Parameter | Description |
|---|---|
| Package | LQFP100 (14x14x1.4 mm, exposed pad down) |
| Regulators | 1 pre-boost regulator, 1 pre-buck regulator, 1 linear 5 V regulator with 1 A output, 3 independent self-protection 5 V tracking regulators with 150 mA output |
| Drivers | 4 channels LS injector drivers, 2 channels LS drivers for O2H load with current sense, 2 channels LS camshaft or solenoid drivers, 5 channels LS relay drivers, 2 channels LS LED drivers, 3 channels LS/HS drivers with low battery function for smart start, 1 channel LS main relay driver (MRD) with internal diode for reverse battery protection |
| Pre-drivers | 5 channels pre-drivers for external FET drivers, 6 channels pre-drivers for internal or external igniter drivers |
| Communication Interfaces | K-Line ISO9141/LIN 2.1 compliant, CAN-FD with wakeup by CAN function |
| Other Features | Integrated charge-pump, VRS-interface, Watchdog, Wake-up pin, Temperature sensor and monitoring, Stop-counter with wakeup, Dual bandgap reference & oscillator |
Key Features
- AEC-Q100 qualified and engineered for ISO26262 compliant systems.
- Comprehensive power management: pre-boost, pre-buck, and linear regulators.
- Multiple low-side drivers for various automotive applications (injectors, O2H loads, camshaft/solenoid, relays, LEDs).
- Integrated charge-pump, watchdog, and temperature sensor.
- K-Line ISO9141/LIN 2.1 and CAN-FD communication interfaces.
- Coordinated soft start-up of all regulators and smart reset circuit.
- Internal and external igniter drivers and main relay driver with reverse battery protection.
Applications
The L9788TR is primarily designed for automotive engine management systems, particularly for controlling 4-cylinder internal combustion engines. It is suitable for various automotive applications requiring robust power management, signal preprocessing, and reliable communication interfaces.
Q & A
- What is the primary application of the L9788TR?
The L9788TR is designed for automotive engine management systems, specifically for controlling 4-cylinder internal combustion engines. - What are the key power management features of the L9788TR?
The device includes a pre-boost regulator, a pre-buck regulator, a linear 5 V regulator with 1 A output, and three independent self-protection 5 V tracking regulators. - What communication interfaces does the L9788TR support?
The L9788TR supports K-Line ISO9141/LIN 2.1 and CAN-FD with wakeup by CAN function. - Is the L9788TR compliant with automotive safety standards?
Yes, the L9788TR is AEC-Q100 qualified and engineered for ISO26262 compliance. - What type of drivers are included in the L9788TR?
The device includes low-side drivers for injectors, O2H loads, camshaft/solenoid, relays, LEDs, and main relay drivers. - Does the L9788TR have integrated protection features?
Yes, it includes overcurrent protection, thermal protection, and a watchdog. - What is the package type of the L9788TR?
The L9788TR is packaged in an LQFP100 (14x14x1.4 mm, exposed pad down). - Does the L9788TR support smart start functionality?
Yes, it includes low-side drivers with low battery function for smart start. - What other features does the L9788TR include?
The device includes an integrated charge-pump, VRS-interface, wake-up pin, temperature sensor and monitoring, and a stop-counter with wakeup. - How does the L9788TR handle power-up and power-down sequences?
The device features coordinated soft start-up of all regulators and various power-up and power-down modes, including power-up from KEY_IN and WAKE_UP_TIMER.
