The PT4115 SOT89-5 RoHS LED Driver manufactured by Youtai is an electronic device designed to drive LED load currents up to 200 mA. It has an adjustable output current from 20 to 200 mA, and a 4-pin SOT89-5 RoHS package. The PT4115 can be used to control two single strings of LEDs with a supply voltage input of 3.3-25V. The device has built-in averaging current control, thermal protection and open/short LED protection. Its operating temperature range is from -40°C to +85°C. Furthermore, the device provides a constant power leading edge dimming technique, allowing the user to control the output power of the LEDs with a pulse-width modulation.