Overview
The TPS92511DDAR, produced by Texas Instruments, is a 500-mA, 65-V common anode constant current buck LED driver. This device is designed for driving a single LED string with high efficiency and ease of use. It features a wide input voltage range from 4.5 V to 65 V and supports up to 500 mA of LED current. The TPS92511DDAR integrates a low-side N-channel power MOSFET, eliminating the need for external current sensing resistors and loop compensation components, making it a compact and efficient solution for LED lighting applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 to 65 | V |
| Output Current | Up to 500 | mA |
| Switching Frequency | 50 kHz to 500 kHz | kHz |
| Dimming | Analog, PWM | - |
| Operating Temperature | -40 to 125 | °C |
| Package | 8-PowerSOIC (0.154", 3.90mm Width) | - |
| Thermal Resistance (Junction-to-Ambient) | 59.9 | °C/W |
Key Features
- No external current sensing resistor required
- No external loop compensation needed
- Integrated low-side N-channel power MOSFET
- Programmable switching frequency (50 kHz to 500 kHz)
- Programmable LED current (up to 500 mA)
- Analog and PWM dimming support
- High contrast ratio (up to 1000:1) feasible
- Thermal foldback and overcurrent protection
- Compact Power Enhanced SOIC-8 exposed thermal pad package
Applications
- High Power LED Drivers
- Architectural Lighting
- Office Troffer Lighting
- Automotive Lighting
- MR-16 LED Lamps
Q & A
- What is the input voltage range of the TPS92511DDAR?
The input voltage range is from 4.5 V to 65 V.
- What is the maximum output current of the TPS92511DDAR?
The maximum output current is up to 500 mA.
- Does the TPS92511DDAR require an external current sensing resistor?
No, it does not require an external current sensing resistor.
- What are the dimming options supported by the TPS92511DDAR?
The device supports both analog and PWM dimming.
- What is the switching frequency range of the TPS92511DDAR?
The switching frequency can be programmed from 50 kHz to 500 kHz.
- What is the operating temperature range of the TPS92511DDAR?
The operating temperature range is from -40°C to 125°C.
- What type of package does the TPS92511DDAR come in?
The device comes in an 8-PowerSOIC (0.154", 3.90mm Width) package with an exposed thermal pad.
- What are some common applications of the TPS92511DDAR?
Common applications include high power LED drivers, architectural lighting, office troffer lighting, automotive lighting, and MR-16 LED lamps.
- How does the TPS92511DDAR handle thermal management?
The device features thermal foldback and is packaged in a Power Enhanced SOIC-8 with an exposed thermal pad for improved heat dissipation.
- What is the contrast ratio achievable with the TPS92511DDAR?
A contrast ratio of up to 1000:1 is feasible with the TPS92511DDAR.
