UCC35702PWG4

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The UCC35702PWG4 DC DC Switching Controller is a single-phase, synchronous buck controller, designed to provide PWM control of a synchronous MOSFET buck switch. Synchronous buck converters require synchronous switching of the low side MOSFET and the UCC35702PWG4 is designed to regulate switch current, providing a constant output voltage regardless of load current. The UCC35702PWG4 is an ideal power conversion solution and is used in a variety of applications, including but not limited to, ITE and datacom power supplies, sensors, LED drivers, and power management in automotive applications.

The UCC35702PWG4 is part of Texas Instruments\' Precision Integrated Circuits (PIC) range, which offer automotive grade precision control. It is specifically designed to manage the high currents and accurately regulate the output voltage at different load conditions. A key feature of the UCC35702PWG4 is its integrated geometry. The chip is able to provide a controlled power solution with only one external MOSFET, resulting in a minimalistic,yet functional, circuit solution.

Due to its power efficiency and integrated geometry, the UCC35702PWG4 is used in a wide range of applications, from low end to high power, and in rapid response, high performance applications. It is a popular choice in medical, consumer electronic, and industrial control systems. High end applications include advanced automotive power supplies, such as fuel injection systems, air conditioning systems, and brake controllers.

The output voltage of a synchrnonous buck converter is maintained by carefully matching the on and off times of the MOSFET switch. This is referred to as the duty cycle or \'d\'. The duty cycle is defined by the difference between the on and off times. The UCC35702PWG4 uses a proprietary algorithm to calculate the appropriate duty cycle based on the input voltage and output current. The controller is also able to adapt to different operating conditions by adjusting the off time and thus maintaining the correct output voltage.

The UCC35702PWG4 is designed to operate in both continuous and discontinuous inductor current modes, depending on the size of the output current. In discontinuous operation, the inductor current is allowed to go above and below the average value. This provides greater efficiency and improved transient response. In continuous operation, the inductor current is regulated between two defined limits, resulting in a smooth output voltage.

The UCC35702PWG4 includes several protection features to ensure safe operation. It has overcurrent, over voltage, under voltage, and thermal protection. These protection features shut off the output when the set parameters are exceeded, ensuring that the system is safe and reliable. The controller also features a frequency foldback feature that reduces the switching frequency during low current operation, resulting in increased efficiency and reduced noise.

The UCC35702PWG4 is a high performance, single phase, synchronous buck controller designed to provide a cost effective and reliable power solution for a variety of applications. Its integrated geometry and wide range of protection features make it an ideal choice for demanding applications requiring high efficiency and rapid response. The controller is able to accurately regulate the output voltage at different load conditions, resulting in a stable and reliable power solution.

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