Overview
The TPS92691PWPR from Texas Instruments is a multi-topology LED driver integrated with a rail-to-rail current sense amplifier. This device is designed to support a wide range of step-up or step-down driver topologies, making it versatile for various LED lighting applications. It features a fixed-frequency peak current mode control technique with programmable switching frequency, slope compensation, and soft-start timing. The TPS92691PWPR is particularly notable for its high voltage (65-V) rail-to-rail current sense amplifier, which ensures accurate LED current measurement and regulation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 to 65 | V |
| Output Voltage Range | 2 to 65 | V |
| LED Current Accuracy | Better than ±3% | - |
| Junction Temperature Range | -40 to 140 | °C |
| Switching Frequency Range | 80 to 700 | kHz |
| Maximum Output Current | 5 | A |
| Package Type | HTSSOP-16-EP | - |
| Operating Ambient Temperature Range | -40 to 125 | °C |
Key Features
- Wide input voltage range of 4.5 V to 65 V and wide output voltage range of 2 V to 65 V.
- Low input offset rail-to-rail current sense amplifier with better than ±3% LED current accuracy over a junction temperature range of 25°C to 140°C.
- Compatible with high-side and low-side current sense implementations.
- High-impedance analog LED current adjust input (IADJ) with over 15:1 contrast ratio.
- Over 1000:1 series FET PWM dimming ratio with integrated series N-channel dim driver interface.
- Continuous LED current monitor output for system fault detection and diagnoses.
- Programmable switching frequency with external clock synchronization capability and programmable soft-start and slope compensation.
- Comprehensive fault protection circuitry including VCC undervoltage lockout (UVLO), output overvoltage protection (OVP), cycle-by-cycle switch current limit, and thermal protection.
- Automotive Q100 Grade 1 qualified for the TPS92691-Q1 variant.
Applications
- Automotive exterior lighting.
- Architectural and general lighting applications.
- LED lighting systems requiring high accuracy and reliability.
- Systems needing versatile step-up or step-down driver topologies.
Q & A
- What is the input voltage range of the TPS92691PWPR?
The input voltage range is from 4.5 V to 65 V.
- What is the accuracy of the LED current regulation?
The LED current accuracy is better than ±3% over a junction temperature range of 25°C to 140°C.
- Can the TPS92691PWPR support both high-side and low-side current sense implementations?
- What is the contrast ratio achievable with PWM dimming?
The device can achieve over 1000:1 contrast ratio using series FET PWM dimming.
- Does the TPS92691PWPR have built-in fault protection features?
- Is the TPS92691-Q1 variant automotive qualified?
- What is the maximum output current of the TPS92691PWPR?
The maximum output current is 5 A.
- What is the operating ambient temperature range of the TPS92691PWPR?
The operating ambient temperature range is from -40°C to 125°C.
- Can the switching frequency be programmed?
- Does the TPS92691PWPR support continuous LED status check?
