Overview
The TPS92611-Q1 is an automotive single-channel linear LED driver produced by Texas Instruments. This device is part of a family of LED drivers designed to provide a simple and reliable solution for automotive LED applications. It is qualified for automotive use, meeting AEC-Q100 standards with a temperature grade 1 rating, operating from -40°C to 125°C. The device features advanced diagnostics and fault protection, making it suitable for various automotive exterior lighting systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | 0.3 | A |
| Output Voltage | 0 to 40 | V |
| Number of Channels | 1 | |
| Package Type | 8-TSSOP, 8-MSOP | |
| Mounting Type | SMD | |
| Operating Temperature | -40 to 125 | °C |
| ESD Classification | HBM: Level H2, CDM: Level C3B |
Key Features
- Constant-Current Driver: The device features a high-side constant-current integrated driver, allowing the output current to be set using an external high-side current-sense resistor (R(SNS)).
- PWM Dimming: Supports PWM dimming via PWM input dimming and supply dimming, enabling precise control over LED brightness.
- Advanced Diagnostics: Includes LED open-circuit detection, short-to-GND detection, and overtemperature protection. The device also features a one-fails–all-fail fault bus for comprehensive fault management.
- Low-Dropout Mode: The device can operate in low-dropout mode to maintain current regulation even when the supply voltage drops, using the DIAGEN pin to avoid false diagnostics.
- Functional Safety Capable: Documentation is available to aid in functional safety system design, making it suitable for safety-critical applications.
Applications
The TPS92611-Q1 is primarily designed for automotive exterior lighting systems, including headlights, taillights, and other LED-based lighting applications. Its robust diagnostic and fault protection features make it an ideal choice for ensuring reliability and safety in automotive lighting systems.
Q & A
- What is the operating temperature range of the TPS92611-Q1?
The operating temperature range is from -40°C to 125°C.
- How is the output current set in the TPS92611-Q1?
The output current is set using an external high-side current-sense resistor (R(SNS)).
- Does the TPS92611-Q1 support PWM dimming?
Yes, it supports PWM dimming via PWM input dimming and supply dimming.
- What types of faults can the TPS92611-Q1 detect?
The device can detect LED open-circuit faults, short-to-GND faults, and overtemperature faults.
- How does the one-fails–all-fail fault bus work?
The fault bus allows the device to signal faults to other devices in the system, ensuring that if one channel fails, all connected channels can be shut down for safety.
- What is the purpose of the DIAGEN pin?
The DIAGEN pin is used to disable the open-circuit diagnostic function during low-voltage operation to avoid false error reports and to drive maximum current in low-dropout mode).
- Can the TPS92611-Q1 operate in low-dropout mode?
Yes, the device can operate in low-dropout mode to maintain current regulation when the supply voltage drops).
- Is the TPS92611-Q1 qualified for automotive use?
Yes, it is AEC-Q100 qualified with a temperature grade 1 rating).
- What is the maximum output voltage of the TPS92611-Q1?
The maximum output voltage is 40V).
- What is the maximum output current of the TPS92611-Q1?
The maximum output current is 0.3A).
