Overview
The L9781TR is a versatile multi-valve pre-driver designed by STMicroelectronics for various automotive applications. This component offers advanced control capabilities, particularly for diesel and gasoline direct injection systems. It can drive 11 external N-channel logic level MOSFETs, efficiently controlling inductive loads and a DC/DC step-up converter. The L9781TR includes comprehensive protection features to safeguard against unexpected faults in external hardware, ensuring reliable performance in diverse operating conditions. The internal configurable Finite State Machines (FSMs) enable precise peak and hold current control along with diagnostic functions, reducing the workload on the main microcontroller for seamless integration into existing systems.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Manufacturer | STMicroelectronics | Qualification | AEC-Q100 |
| Packaging | LQFP64 (10x10 mm) | Series | L9781 |
| Brand | STMicroelectronics | Factory Pack Quantity | 1000 |
| Pin Count | 64 | AEC-Q100 Qualified | Yes |
| Automotive Application | Yes | DC/DC Converter Controller | Up to 80 V |
| SPI Interface | 32-bit, up to 8 MHz | Power Supplies | VBAT, VTANK, VCCD |
Key Features
- Real-time voltage and current monitoring
- Programmable alarm thresholds for overload protection
- Synchronized shutdown feature for safety
- Digital-to-analog converter for precise control
- Internal configurable Finite State Machines (FSMs) for peak and hold current control and diagnostic functions
- Driving capability for 11 external N-channel logic level MOSFETs
- Comprehensive protection features against accidental external short circuits
- 32-bit SPI interface for IC general control, parameter setting, and diagnosis
Applications
The L9781TR is primarily designed for automotive applications, particularly in diesel and gasoline direct injection systems. It is suitable for controlling inductive loads and DC/DC step-up converters, making it an essential component in modern vehicle fuel systems. Additionally, its robust protection features and precise control mechanisms make it a reliable choice for various automotive power management and control systems.
Q & A
- Q: What is the L9781TR and its primary function?
A: The L9781TR is a multi-valve pre-driver designed for automotive applications, particularly for diesel and gasoline direct injection systems. It controls inductive loads and a DC/DC step-up converter, offering advanced protection and diagnostic features.
- Q: What are the key protection features of the L9781TR?
A: The L9781TR includes comprehensive protection features such as programmable alarm thresholds for overload protection, synchronized shutdown for safety, and hardware protection against accidental external short circuits.
- Q: How does the L9781TR integrate with other systems?
A: The L9781TR integrates seamlessly with existing systems through its 32-bit SPI interface, allowing for IC general control, parameter setting, and diagnosis. The internal FSMs reduce the workload on the main microcontroller.
- Q: What is the packaging and pin count of the L9781TR?
A: The L9781TR is packaged in a 64-pin LQFP64 (10x10 mm) package.
- Q: Is the L9781TR AEC-Q100 qualified?
A: Yes, the L9781TR is AEC-Q100 qualified, ensuring it meets the stringent standards for automotive applications.
- Q: How can I obtain detailed information about the L9781TR, such as application notes and datasheets?
A: Detailed information, including application notes and datasheets, can be found on the STMicroelectronics website or through authorized distributors like Ovaga.
- Q: What is the warranty period for the L9781TR?
A: The L9781TR typically comes with a 1-year warranty, covering defects in materials and workmanship under normal use.
- Q: How can I ensure the authenticity of the L9781TR?
A: Ensure you purchase from authorized distributors who rigorously test and verify the credentials of original STMicroelectronics manufacturers and agents.
- Q: What is the return or replacement process for the L9781TR?
A: Returns or replacements are accepted if defects are reported within 365 days of delivery, and the product must be unused and in its original packaging. Return Authorizations must be obtained from the supplier.
- Q: How can I contact support for technical inquiries about the L9781TR?
A: For any after-sales support or technical inquiries, contact the supplier via email or through their customer service channels.
