The OC5219 is a continuous inductor current on-mode step-down LED constant current driver for driving one or more LED strings. The OC5219 operates from 5.5V to 30V and provides adjustable output current up to 1A. Depending on the input voltage and external components, the OC5219 can drive LEDs up to tens of watts
The OC5219 has a built-in power switch with high-end current-sensing circuitry and a dimming pin DIM that is compatible with PWM and analog dimming. When the DIM pin voltage is lower than 0.3v, the output is turned off and enters the standby state.
The OC5219 has a built-in over-temperature protection circuit, and when the chip reaches the over-temperature protection point and enters the over-temperature protection mode, the output current gradually decreases to improve system reliability.
The OC5219 uses a patented circuit architecture to ensure that the output current is free of overshoot at low dropout voltage, improving the LED operating life, and the OC5219 uses a patented constant current circuit with excellent load regulation and linear regulation.
The OC5219 is available in a SOT89-5 package.

Fields of application
LED backup lights, signal lights
Low-voltage LED spotlights instead of halogen lamps
Automotive lighting