TLD5191ES - a synchronous MOSFET H-Bridge DC-DC controller with built-in protection features The TLD5191ES is a synchronous MOSFET H-Bridge DC-DC controller for high power LED driving. It offers analog/digital dimming, adjustable switching frequency (200 kHz to 700 kHz), and spread spectrum modulation for improved EMC behavior. The current mode regulation ensures stability with small external components. The controller has built-in protection features, adjustable soft start, and is suitable for automotive and industrial applications.