CS51411EDR8

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The CS51411EDR8 is a high-efficiency, 3-phase synchronous buck dc-dc switching regulator. This device is designed to handle a wide range of power requirements, offering up to 14.5A continuous current as well as high-side and low-side switching power managed by its integrated gate drivers, suitable for high-current step down applications. The CS51411EDR8, with its advanced control architecture and ultra-high speed response time, can help to maximize system efficiency and reduce system size and cost without compromising performance.

Application Field of CS51411EDR8

The CS51411EDR8 is an ideal solution for a wide range of applications such as industrial, telecommunications, automotive and computer systems, DSPs, storage devices, ASICs, FPGAs, game consoles, digital TVs, set-top boxes, digital cameras, notebooks and PCs, and many other dc-dc applications. Its operating frequency is adjustable between 100kHz and 1000kHz and voltage range is 4.5V to 28V.

The CS51411EDR8 adopts current mode control with an integrated step-down topology to implement the high frequency operation. Moreover, the device features very low quiescent current and excellent line and load transient response. All of these features make it perfect for a wide range of applications in the industrial and commercial sector where efficiency, heat dissipation and space are at a premium.

The CS51411EDR8 is an ultra- low shutdown quiescent current device with a power-on reset function and a fast forced input-output delay. It can reduce the switching losses and extend system battery life.

Working Principle of CS51411EDR8

The CS51411EDR8 utilizes advanced current mode control with an integrated step-down topology to implement the high frequency operation. This topology allows switching of the input voltage to various regulated output voltages. By using an external control loop, the switching frequency of the CS51411EDR8 is adjustable to optimize performance for a given application.

When the power is applied, the internal converter initiates a turn-on sequence at approximately 3V. A preset input-output delay is generated to ensure full current to the output before the internal switch is enabled. During the startup sequence, the CS51411EDR8 detects the output voltage and ensures the output pins reach a safe condition.

When the regulator is enabled, the input current flows through the internal switch and is regulated by the external current sense resistor. The maximum current limits are programmed internally. The current also feeds into a VCO that determines the clock frequency. The switch is then alternately high-side and low-side driven depending on the direction of the current.

During an over-current event, the device automatically shuts off the internal switch and enters a power-saving mode. An external resistor can be used to adjust the current limit soon afterwards. To achieve maximum efficiency, the CS51411EDR8 also offers several programmable options such as frequency control, spread spectrum clock and shift clock to reduce EMI, as well as idle mode for low power consumption when the system is in standby.

The CS51411EDR8 is an efficient, compact, easy-to-use, three-phase buck regulator that provides high-current and high-performance power management in a variety of applications. It is an ideal choice for advanced power management systems that require high efficiency and low noise operation.

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