OC5121 is a high-efficiency, high-precision step-down high-power LED constant current driver control chip.
The OC5121 uses a fixed-frequency average current control method with excellent load regulation and linear regulation.
The OC5121 can control the driving current of high-brightness LED lamps by adjusting the external current sensing resistor to achieve the expected constant brightness of the LED lamps.
The OC5121 supports linear dimming, which can be done via the CS end.
The OC5121 has an integrated electrical high and low brightness function, which can select the high or low brightness operation mode through the HL pin.
The OC5121 integrates a VDD regulator and an over-temperature protection circuit to reduce external components and improve system reliability.
The OC5121 is available in a SOT23-6 package.

Fields of application
LED car headlights
Bicycles, electric vehicles, motorcycle lights
A flashlight
LED spotlights
High-power LED lighting
LED backlight