OC5221BT is a multi-function average current type LED constant current driver with simple peripheral circuits, suitable for the step-down BUCK high-power dimming constant current LED field in the voltage range of 5-100V.
The OC5221BT’s PWM port supports ultra-small duty cycle PWM dimming and responds to a minimum pulse duration of 60ns. When the PWM port is high, the chip works normally. When the chip is low, the chip output is turned off.
OC5221BT The average current control algorithm is adopted, the output current constant current accuracy is ≤+3%, and the output current is less affected by the input and output voltage and system inductance; The chip integrates loop compensation, the peripheral circuit is simple, and the system is more stable and reliable.
OC5221BT Three-function switching is achieved by controlling the ID port. When LD is in the air, the system is in highlight mode; When LD is VDD, the system is in low-light mode with 1/2 current; ID When connected to the 0.2-1.2V analog dimming signal input, the system is in analog dimming mode. The ID high and low brightness switching mode is used to realize the switching of high and low beams for automotive LED lighting. ID When the port voltage is below 0.2V in analog dimming mode, the output is off.
OC5221BT is available in a SOT23-6 package.

Fields of application
Landscape lighting wall washers
Stage dimming effect lights
High-end automotive lighting
LCD backlighting
Architectural lighting