SCY991351BDR2G

SCY991351BDR2G - DC DC Switching Controllers Application Field and Working Principle

Overview: The SCY991351BDR2G is a DC/DC switching controller that can be used in power management applications. It is a self-contained, monolithic integrated circuit (IC) and is manufactured by Scytec Inc. The SCY991351BDR2G is a highly-integrated controller, providing specific solutions for DC/DC controller applications.

Features: The SCY991351BDR2G DC/DC switching controller offers various features, such as:

• Integrated Power MOSFET switching
• Up to 4.5A Integral Current Limit
• Adaptive On-Time Control
• Programmable Hysteretic Over-Voltage Protection (OVP)
• External Short Circuit Protection (SCP)
• Power Good Output
• 6MHz Switching Frequency
• Soft Start

Applications: The SCY991351BDR2G DC/DC switching controller is widely used in various power management applications such as notebook computers, servers, storage devices, and embedded systems. It is well-suited for use in battery-powered mobile devices that require high power efficiency.

Working Principle: The SCY991351BDR2G DC/DC switching controller is a current-mode control type of device. It works by monitoring the voltage and current at the point where the switching MOSFET is connected to the output of the power stage. This gives the controller feedback on the current levels and allows it to adjust the MOSFET switching frequency and the gate voltage accordingly. This helps the controller achieve optimum frequency and gate voltage control without generating high levels of thermal noise.

The SCY991351BDR2G DC/DC switching controller utilizes an Adaptive On-Time (AOT) control architecture that helps provide accurate and stable output power conversion. It also has an integrated power monitoring feature that can be used to monitor the system’s overhead and switch current levels. This ensures reliable power supply operation and reduces system design costs.

The SCY991351BDR2G DC/DC switching controller also features a programmable hysteric over-voltage protection (OVP) circuit. This feature is designed to prevent circuits from operating at higher than necessary voltages. It can be used to improve the stability of power supply circuits and help protect components from over-voltage damage.

The SCY991351BDR2G DC/DC switching controller also has an external short-circuit protection (SCP) circuit. This protects the power supply in the event of a short circuit, preventing damage to the output stage components. This feature is commonly used in applications that require hot swapping, such as power supplies for computing and storage applications.

In addition, the SCY991351BDR2G DC/DC switching controller has a power good output that can be used to indicate whether the power supply is working properly. This output can be used to initiate certain functions within the system, such as turning on downstream power supply stages when the power good signal is received.

Overall, the SCY991351BDR2G DC/DC switching controller is a highly efficient and feature-rich device that is suitable for a variety of power management applications. With its integrated power MOSFET switching, Adaptive On-Time Control and numerous other features, it helps provide reliable and efficient power delivery.