Power Integrations, Inc. DC DC Switching Controllers TFS7701H

The TFS7701H from Quarktwin Technology Ltd. is a combined two-switch forward and flyback power supply controller designed for high power applications. It features integrated high-voltage MOSFETs and operates with a selectable main switching frequency of 132 kHz, which allows for reduced costs and smaller magnetics. The device can deliver up to 148 W of continuous output power in two-switch forward mode and 20 W in flyback mode, with peak output capabilities reaching 187 W. This controller incorporates several advanced features, including self-biased high-side drivers, comprehensive protection mechanisms (such as undervoltage, overvoltage, and thermal shutdown), and transformer reset control to prevent saturation. The TFS7701H is designed for high efficiency, achieving over 90% efficiency at full load, and supports a wide input voltage range. Its compact eSIP-16F package allows for direct mounting to heat sinks without insulation pads, simplifying thermal management and PCB layout. Typical applications include PCs, printers, LCD TVs, video game consoles, and high-power adapters. The device is halogen-free and RoHS compliant, making it suitable for environmentally conscious designs.