Overview
The TPS92692QPWPRQ1, produced by Texas Instruments, is a high-accuracy LED controller designed to support step-up and step-down LED driver topologies. This device is part of the TPS92692 and TPS92692-Q1 family, which are peak current mode based controllers. They feature a fixed-frequency operation and incorporate a rail-to-rail current sense amplifier to ensure constant output current and fast transient response. The TPS92692-Q1 is specifically qualified for automotive applications, meeting the Automotive Q100 Grade 1 standards.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Input Voltage Range | 4.5 V to 65 V | Wide input voltage range for versatility in different applications |
| LED Current Accuracy | Better than ± 4% over –40°C to 150°C | High accuracy in LED current regulation across a wide temperature range |
| Frequency Modulation | Spread Spectrum Frequency Modulation | Improves EMI performance |
| Dimming Range | Over 1000:1 with direct PWM input | Extensive dimming capabilities for various lighting applications |
| Analog Dimming Range | Over 15:1 contrast ratio | Linear analog dimming response through the IADJ input |
| Operating Temperature | –40°C to 125°C | Robust operation across a wide temperature range |
| Fault Protection | Comprehensive fault protection circuitry with current monitor output and open drain fault flag indicator | Includes protections for LED overcurrent, output overvoltage, and output undervoltage |
Key Features
- Internal Analog Voltage to PWM Duty Cycle Generator: Enables stand-alone dimming operation by translating DC voltage to PWM duty cycle.
- Direct PWM Input: Supports over 1000:1 dimming range for precise control.
- Analog LED Current Adjust Input (IADJ): Provides over 15:1 contrast ratio for linear analog dimming.
- Integrated P-Channel Driver: Enables series FET dimming and LED protection.
- Current Monitor Output (IMON): Reports the instantaneous status of LED current, useful for detecting LED short circuits and cable harness failures.
- Open Drain Fault Indicator Output: Indicates LED overcurrent, output overvoltage, and output undervoltage conditions.
Applications
- Automotive Exterior Lighting: Qualified for automotive applications, meeting Q100 Grade 1 standards.
- Driver Monitoring Systems (DMS): Suitable for use in driver monitoring systems due to its high accuracy and reliability.
- LED General Lighting Applications: Ideal for various general lighting applications requiring high accuracy and dimming capabilities.
- Exit Signs and Emergency Lighting: Reliable operation in critical lighting applications such as exit signs and emergency lighting.
Q & A
- What is the input voltage range of the TPS92692QPWPRQ1?
The input voltage range is from 4.5 V to 65 V.
- What is the LED current accuracy of the TPS92692QPWPRQ1?
The LED current accuracy is better than ± 4% over a junction temperature range of –40°C to 150°C.
- Does the TPS92692QPWPRQ1 support PWM dimming?
- What is the purpose of the IADJ input?
The IADJ input is used for analog LED current adjustment, providing over 15:1 contrast ratio.
- Does the TPS92692QPWPRQ1 have built-in fault protection?
- What is the operating temperature range of the TPS92692QPWPRQ1?
The operating temperature range is from –40°C to 125°C.
- Is the TPS92692QPWPRQ1 suitable for automotive applications?
- How does the TPS92692QPWPRQ1 improve EMI performance?
- What is the function of the IMON output?
The IMON output reports the instantaneous status of LED current, useful for detecting faults such as LED short circuits and cable harness failures.
- Can the TPS92692QPWPRQ1 be used in general lighting applications?
