ST763ACDTR Datasheet/PDFPMIC - Voltage Regulators - DC DC Switching Regulators
The ST763ACDTR is a DC DC switching regulator from STMicroelectronics, part of their ST7 family of high performance power management ICs. It is an integrated controller and oscillator for a DC DC converter, with a wide range of features and options for applications across multiple industries. It offers a full suite of features for high performance, flexibility and scalability, including voltage mode operation, current limiter, over-temperature protection, over-voltage protection, soft-start/soft-stop, an adjustable frequency range and improved power dissipation.
Application fields
ST763ACDTR can be found in many applications, ranging from automotive, industrial and medical heaters, to industrial and consumer power supplies, motor drives and AC power adapters. It is suitable for DC/DC conversion in a wide range of power applications with 12-24V input and up to 10A output. For example, in telecommunications equipment, the ST763ACDTR can be used as a voltage regulator to supply a wide range of non-isolated power supplies from a single input, including up to three output voltages ranging from 0.9V to 19.5V with up to 10A output each. Additionally, its overvoltage protection feature ensures that the output voltage is always within a safe range, preventing damage to connected devices.
Working principle
The ST763ACDTR is a proposed synchronous buck DC-DC converter with constant frequency peak current-mode control. The converter operates at a fixed frequency, with a peak current-mode feedback control loop that adjusts the switching period to regulate the output voltage. The control loop ensures that the inductor current remains at its peak value, enabling high efficiency operation and superior output voltage regulation. In addition, the device also integrates a start-up regulator and embedded protections, such as over current, over temperature and output over voltage protection, to ensure safe and dependable operation.
The converter is based on a voltage-mode, fixed frequency, synchronous buck topology configured with two voltage sources. A FET, controlled by an oscillator, passes the inductor current, providing the needed energy. The reference voltage is compared with the voltage at the converter\'s feedback pin, and the resulting error is used to adjust the switching frequency. When the load or output voltage changes, the error increases or decreases, causing the converter to either increase or decrease the switching frequency in order to maintain a constant output voltage.
The ST763ACDTR is a versatile and reliable device, suitable for a wide range of applications. It is easy to use and has a wide range of features to ensure proper, safe and efficient operation. Its accuracy, efficiency and protection features are designed to ensure reliable operation, making it an optimal choice for many power management applications.