LEDs have become the standard lighting source due to numerous advantages over traditional incandescent and arc-gas lamps. These advantages include higher efficiency, improved reliability, longer lifetimes, smaller sizes, and faster switching capabilities. For LED illumination, a constant-current regulator is essential. This is because the current of a high-power LED can double with just a 10% increase in voltage, posing a high risk of LED damage. When selecting LED illumination drivers, the topology of the power stage and flexible dimming control are two primary considerations.

TSC provides linear and switching LED drivers for automotive and other applications. There are topologies in AC-DC, and DC-DC with different packages: MSOP-10, SOT-26, etc. For example, The TS19503 is a continuous conduction mode hysteretic buck converter, designed for driving single or multiple LEDs. It operates from an input supply between 4.5V and 75V. It provides a high-accuracy output current externally adjustable up to 2A. Depending upon the supply voltage and external components, the TS19503 can provide more than 25 watts of output power.