ST750ACDTR Integrated Circuits (ICs)

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ST750ACDTR is a high-efficiency DC-DC Buck and Buck/Boost Switching Regulator Controller manufactured by STMicroelectronics. The device provides power supply design engineers with an integrated solution to convert, regulate, and optimize power efficiently in a compact form factor. With a wide input voltage range of 2.5V to 26V, it is designed to be combined with N-channel MOSFETs to form non-isolated DC-DC switching converters, such as buck and buck-boost.

The ST750ACDTR features a programmable on-time variable frequency operation, allowing the user to adjust frequency settings depending on the application requirements. The device contains an active-low enable input that allows the controller to be disabled in power saving standby mode, and also a power good output pin that provides system level diagnostics. The integrated control circuitry greatly simplifies the design of a buck and buck-boost power solution, improving robustness and reliability, shrinking board size, and reducing cost.

The ST750ACDTR is an ideal choice for applications such as LED driving, lighting, and other industrial purposes, battery management, charging and discharging, automotive, and fixed telecom applications. With its advanced features, the controller provides superior performance in applications requiring high efficiency, low noise, and precise regulation.

The working principle behind the ST750ACDTR is based on the pulse width modulation (PWM) technique. To start the PWM cycle, the voltage is applied through the MOSFET at the switching node. This voltage at the switching node varies depending on the duty cycle of the PWM signal. When the duty cycle is less than 100%, the effective voltage across the load will reduce, and when the duty cycle is higher than 100%, the effective voltage across the load will increase. In this way, the PWM signal is used to regulate the voltage across the load. The duty cycle of the PWM signal can be modulated to control the maximum and minimum duty cycled voltage levels.

The ST750ACDTR also includes comprehensive protection features such as input under-voltage lockout, over-current protection, and thermal shutdown. The device can be programmed to set a current sense threshold, which will trigger if the current going through the inductor exceeds this threshold and turn off the switch. The input voltage, output voltage, and switching frequency can also be externally programmed to adjust the operating parameters as needed. The device also features an adjustable soft-start and current limit, which can be programmed to limit the current during startup and shutdown to reduce the inrush current and output voltage noise, thus improving system efficiency.

In conclusion, ST750ACDTR is a high-performance DC-DC Buck and Buck/Boost Switching Regulator Controller from STMicroelectronics. With advanced features and protection mechanisms, it is the perfect solution for applications such as LED driving, lighting, and other industrial purposes, battery management, charging and discharging, automotive, and fixed telecom applications. It is designed to offer high efficiency and precise regulation for a wide range of industrial, consumer, and other applications.

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