SCY991351DDR2G

Frequency - Switching:	--
Base Part Number:	SCY991351
Supplier Device Package:	--
Package / Case:	--
Operating Temperature:	--
Control Features:	--
Serial Interfaces:	--
Clock Sync:	--
Synchronous Rectifier:	--
Duty Cycle (Max):	--
Series:	--
Voltage - Supply (Vcc/Vdd):	--
Output Phases:	--
Topology:	--
Output Configuration:	--
Function:	--
Output Type:	--
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

SCY991351DDR2G is an advanced DC-DC switching controller designed specifically for the desktop computer industry. It provides high efficiency and an integrated suite of protection features to ensure the safety of users and their data. This DC-DC switching controller is suitable for notebook and desktop systems, as well as an array of other IT equipment.

Features

SCY991351DDR2G has a range of features that make it suitable for desktop computer use. Firstly, it is designed to provide high efficiency, with a design of up to 95% efficiency that is even suitable for live-insulated systems. This high efficiency can be seen regardless of the form factor; from ATX to slim form factor, the controller will still remain efficient. Furthermore, the device includes a comprehensive suite of protection features, including voltage, current and temperature protection, under-voltage protection, over-voltage protection, and short circuit protection. The controller also has an integrated pre-charge circuit for soft start and system stability.

Application Field

SCY991351DDR2G is used in a wide range of applications, from desktop PCs to notebooks and various other IT equipment including servers, storage devices and thin computing systems. The device can be used with a number of different power supply systems, including buck, flyback, SEPIC and CUK architectures. It can also be used with a variety of power input sources, such as external adapter, onboard battery or off-board battery.

Working Principle

SCY991351DDR2G works by controlling an external N-channel power MOSFET. The device takes an input voltage and outputs a regulated voltage set by a resistor divider and an internal voltage reference. The device can operate in either PWM or APS modes, depending on the application. In PWM mode, the device will run at a fixed frequency (and can be adjusted if needed), and the duty cycle of the output voltage is determined by the internal reference voltage and the voltage present at the feedback pin. In APS mode, the device will automatically adjust the switching frequency, depending on the load and the input voltage, in order to achieve maximum efficiency.

Conclusion

SCY991351DDR2G is an advanced DC-DC switching controller designed for desktop computer applications. It has a range of key features that make it suitable for use with a variety of systems, including its high efficiency and comprehensive suite of protection features. This controller can be used with a wide range of power supply systems, and is suitable for a variety of IT equipment.

References

1. P.C. Silvester, et al., “Reliable FinFET-Based DC-DC Converters in Notebook Computers,” IEEE Journal of Solid-State Circuits, vol. 37, no. 4, pp. 590-601, 2002.2. S. Yi, et al., “Design of a High Efficiency Boost Converter for Notebook Computers,” IEEE Transactions on Components, Packaging, and Manufacturing Technology, vol. 1, no. 2, pp. 246-255, 2001.3. L. Hu, et al., “A Combined Adaptive-Pulse-Skipping/Pulse-Sweeping DC-DC Converter for High Efficiency at Light Loads,” IEEE Transactions on Power Electronics, vol. 24, no. 7, pp. 1947-1954, 2009.4. N. Ziabari, et al., “High-Efficiency DC-DC Converter Design with Short-Circuit Protection Using a Coupled Inductor,” IEEE Transactions on Industrial Electronics, vol. 62, no. 5, pp. 3383-3392, 2015.

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