Union Semiconductor, Inc. LED Drivers UM1360Y

The UM1360Y is a PWM step-down LED driver designed for efficient operation with a wide input voltage range of 6V to 40V. It can drive up to 10 series-connected LEDs with a constant output current capability of up to 1A, making it suitable for various lighting applications including industrial and general lighting. The device features hysteretic control with high side current sensing, which enhances accuracy and minimizes external component requirements. The output current can be adjusted using an external control signal applied to the VSET pin, allowing for both DC voltage and PWM waveform inputs for dimming capabilities. The UM1360Y also incorporates a spread spectrum technique to reduce electromagnetic interference and includes protections against over-temperature and open circuit conditions. It operates efficiently with up to 98% efficiency and can deliver up to 30 watts of output power depending on the configuration. The product is housed in a compact SOT89-5 package, facilitating integration into space-constrained designs.