Overview
The TPS92511DDA from Texas Instruments is a highly integrated, 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 operates over a wide input voltage range from 4.5 V to 65 V and can achieve an efficiency of up to 95%. The TPS92511DDA features a proprietary Pulse-Level-Modulation (PLM) control scheme that regulates the LED current without the need for external current sensing resistors or loop compensation, making it a versatile and efficient solution for various LED lighting applications.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | - | 65 | V |
| Output Current | - | 500 | - | mA |
| Switching Frequency Range | 50 | - | 500 | kHz |
| Operating Junction Temperature | -40 | - | 125 | °C |
| Thermal Shutdown Temperature | - | 165 | - | °C |
| LED Current Accuracy | - | ±3.6% | - | % |
| Package Type | - | HSOP-8 (Power Enhanced SOIC-8 Exposed Thermal Pad) | - | - |
Key Features
- No external current sensing resistor or loop compensation required.
- Wide input voltage range: 4.5 V to 65 V.
- Programmable LED current up to 0.5 A using an external resistor.
- Programmable switching frequency from 50 kHz to 500 kHz using an external resistor.
- Integrated low-side N-channel MOSFET.
- Support for analog dimming and thermal foldback.
- Thermal shutdown protection and VCC under-voltage lock-out.
- High contrast ratio of up to 1000:1 achievable with fast PWM dimming response.
- Single layer PCB layout feasible.
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 TPS92511DDA?
The input voltage range is from 4.5 V to 65 V.
- How is the LED current programmed in the TPS92511DDA?
The LED current is programmed using an external resistor connected to the IADJ pin.
- What is the switching frequency range of the TPS92511DDA?
The switching frequency can be programmed from 50 kHz to 500 kHz using an external resistor connected to the FS pin.
- Does the TPS92511DDA require external current sensing resistors or loop compensation?
No, it does not require external current sensing resistors or loop compensation.
- What type of package is the TPS92511DDA available in?
The TPS92511DDA is available in the Power Enhanced SOIC-8 exposed thermal pad package (HSOP-8).
- What is the thermal shutdown temperature of the TPS92511DDA?
The thermal shutdown temperature is typically 165°C.
- Can the TPS92511DDA support analog dimming?
- What is the maximum operating junction temperature of the TPS92511DDA?
The maximum operating junction temperature is 125°C.
- What is the typical LED current accuracy of the TPS92511DDA?
The typical LED current accuracy is ±3.6%.
- What are some common applications of the TPS92511DDA?
Common applications include high power LED drivers, architectural lighting, office troffer lighting, automotive lighting, and MR-16 LED lamps.
