TPS92511DDAR

The Texas Instruments TPS92511DDAR is a versatile constant current buck LED driver designed for illumination applications. It features a wide input voltage range from 4.5V to 65V and can deliver a maximum output current of 500mA. This device integrates a low-side N-channel MOSFET, eliminating the need for an external current sensing resistor and external loop compensation, simplifying design and reducing component count.

The TPS92511DDAR supports both Analog and PWM dimming methods, offering flexibility in controlling LED brightness with a high contrast ratio of 1000:1. Its switching frequency is programmable from 50 kHz to 500 kHz, allowing for optimization of efficiency and size. Key protection features include current limit protection, VCC under-voltage lock-out, and thermal shutdown protection, ensuring reliable operation.

Packaged in an 8-SO PowerPad (HSOIC) with an exposed thermal pad, the TPS92511DDAR is designed for surface mount applications. Its operating temperature range is -40°C to 125°C. The device requires a minimum of 5 external components for operation, making it an easy-to-use solution for various LED lighting designs, including automotive and general illumination.

This LED driver can also function as a high voltage buck regulator or a linear current shunt regulator, further enhancing its application scope. The typical quiescent current is 2.8mA, and the LED current accuracy is typically ±3.6%.