FSD176MRTLDTU

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PMIC - AC/DC Converters and Offline Switchers

Power management IC (PMIC) system normally integrate AC/DC converters, offline switchers and other related power stages. The AC/DC converter and offline switcher are used to convert energy from the AC mains to a usable DC voltage. The FSD176MRTLDTU device is a new AC/DC synchronous buck converter designed to meet the needs of today’s power management applications.

Application Fields for FSD176MRTLDTU

FSD176MRTLDTU integrates high-connected bidirectional MOSFETS (High-side, Low-side, and Control logic) to provide lower conduction and switching losses, high efficiency, integrated high-side to save the number of external components, and overcurrent protection. It is ideal for advanced lighting applications such as street lighting, flood lighting, and panel lighting.

The FSD176MRTLDTU supports applications with universal input, ranging from 90 to 264 Vac and provides a 12V to 72V DC output. It is an offline flyback converter which provides higher efficiency and power density. The main application fields of FSD176MRTLDTU include:

• Lighting
• Motor Control
• Set Top Box
• Audio/Video (AV) Systems
• Wireless and Consumer Electronics

Working Principle and Core Functionality of FSD176MRTLDTU

The FSD176MRTLDTU is a high-efficiency offline buck converter with low conduction losses, high voltage tolerance and low switching frequency. It is a highly integrated IC and ideal for power management applications with universal input, ranging from 90 to 264 Vac, with a wide output voltage range of 12V to 72V. The core functionality of FSD176MRTLDTU is the synchronous rectification, which reduces the overall system power loss.

The device starts up in discrete mode and then in continuous current mode (CCM). When the primary control loop and the secondary control loop are in steady state, the FSD176MRTLDTU starts to operate in the CCM and works with adaptive frequency. The primary control loop detects the output voltage and regulates the main switch duty cycle while the secondary control loop controls the synchronous rectification by monitoring the average current.

The device includes a high-connected MOSFETs and the simplified driver circuitry which reduces the overall system cost. It provides multiple protections to increase the reliability and robustness such as overvoltage protection (OVP), over-current protection (OCP), over-temperature protection (OTP), and overload protection (OLP). In addition, it provides an option to provide dimmable control in order to reduce the power consumption and energy losses.

The FSD176MRTLDTU device is a cost-effective, highly integrated, and efficient solution for AC/DC power delivery. It is suitable for a wide range of applications with improved power saving features, high-voltage tolerance, and low conduction losses.

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