SC4809AIMSTRT

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The SC4809AIMSTRT is a single-channel PWM switching controller designed for industrial and automotive applications. Based on its architecture and advanced features, it provides full-featured and reliable power management for a variety of applications.

The SC4809AIMSTRT belongs to the PMIC - Voltage Regulators - DC DC Switching Controllers category. It is a step-down single-channel synchronous buck controller that can provide up to 94% efficiency. Typical applications of the SC4809AIMSTRT are in automotive, telecommunications, industrial, medical, and other high efficiency power sources.

The SC4809AIMSTRT has an input voltage range of 7V to 60V and provides an output voltage range of 0.8V to 95V. It can output up to 18A of continuous current, and can operate at frequencies up to 500kHz.

The SC4809AIMSTRT includes adaptive duty cycle pre-charging, non-overlapping dead time control, as well as over-current protection and thermal shutdown. The adaptive pre-charging function enables seamless transition between burst mode and continuous mode operation. Additionally, the device has a comprehensive set of protection features such as over-voltage protection, under-voltage lockout, over-temperature protection, and soft-start.

The SC4809AIMSTRT utilizes a phase-shift modulation technique to efficiently control the output voltage. The modulation technique is based on phase shifting between two PWM signals applied to the gate of the low-side and high-side power MOSFETS. By adjusting the duty cycle and phase shift between the two PWM signals, the output voltage and current can be controlled.

The SC4809AIMSTRT also features an on-chip 5-bit DAC for external reference and amplification. The external reference in this case is the feedback voltage from the output of the PWM controller. The external reference voltage is compared to the internal reference voltage, and the error between the two is amplified and used to modulate the output voltage. This allows the user to precisely control the output voltage in both step-down and step-up configurations.

Overall, the SC4809AIMSTRT is an extremely reliable and efficient switching controller, offering a wide range of features which make it suitable for a variety of industrial and automotive applications. With its robust protection and excellent control capabilities, the SC4809AIMSTRT can provide a cost-effective, reliable solution for high-efficiency power management.

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