CHL8325A-50CRT

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CHL8325A-50CRT is a high-performance DC DC switching controller from On Semiconductor, a major leader in semiconductor solutions. This controller has been specifically designed for use in synchronous buck applications where high power is needed. The CHL8325A-50CRT offers very high switching speeds, four integrated voltage regulators, flexible control options, and a power switch current capability of up to 50A. The device is available in several versions with different features suitable for different application requirements.

The CHL8325A-50CRT is a PMIC (Power Management Integrated Circuit) in the Voltage Regulators category, specifically under the DC DC Switching Controllers classification. This type of controller provides feedback to and control of a power source in order to regulate voltage or current in a circuit. It achieves this by controlling a power switch, usually an MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), which is modulated to achieve a desired supply voltage or current level.

The CHL8325A-50CRT offers four high-performance buck controllers. The controller is capable of switching from 5V to 24V buses, providing up to 50A of continuous output current. In addition, the device features slew rate control for improved noise and EMI performance, tracking frequency modulation, foldback current limit protection, and programmable embedded trim voltage for improved accuracy and efficiency. The device also includes an integrated bootstrap diode for low-side MOSFET drive. It also features a slew rate-controlled startup for additional noise reduction, triggered by an externally connected VSEN pin.

The CHL8325A-50CRT has significant advantages over traditional linear devices in terms of power efficiency and size. This type of device is ideal for high power applications such as server systems, telecoms, industrial power control systems, and automotive applications. The controller can operate in a wide range of temperatures, making it suitable for industrial and automotive environments.

The working principle of the CHL8325A-50CRT is fairly simple. A current-mode control scheme is employed which monitors the voltage across the MOSFET switch, whose duty cycle is proportional to the desired output voltage. When the output voltage exceeds set thresholds, the controller turns off the power switch, or reduces its duty cycle proportionally, so that the peak current is reduced. This keeps the output voltage at the required levels without having to resort to any additional components, such as linear regulators.

The CHL8325A-50CRT offers an extremely reliable and efficient power solution for high power applications. Its compact size and integrated features such as current limit protection and an embedded trim voltage make it an ideal choice for applications that require a high level of performance and reliability. The device can be easily programmed to suit different application requirements, including those that require fast transients and efficient operation.

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