UCC38085PWG4

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UCC38085PWG4 Application Field and Working Principle

PMIC (Power Management ICs) are integrated circuits designed to manage power in electronic devices and systems. UCC38085PWG4 is a PMIC device from Texas Instruments’ PowerPAD™ family. This PowerPAD device is built for offline switchers and AC/DC converters. In offline switchers and AC/DC converters, UCC38085PWG4 is the best choice in terms of performance, energy efficiency, and cost savings.

UCC38085PWG4 is a fully integrated offline converter with a high-level feature set, including power limiting, current mode, constant on time control, sync-free valley mode control, leading/trailing edge blanking, and a wide input voltage range of up to 65V. It is also integrated with an overcurrent protection circuit and an undervoltage lockout circuit. This device also features an adjustable soft start, allowing it to optimize the power-up sequence.

UCC38085PWG4 is an efficient and cost-effective solution that fits the requirements of a broad variety of offline switcher and AC/DC converter applications, such as TVs, mobile phones, home appliances, portable electronics, and wireless power chargers. In addition, this device’s wide input voltage and current range makes it suitable for applications with a rapidly changing input voltage.

The working principle of UCC38085PWG4 starts from the moment it is powered up. When the voltage is supplied to the input pin, the device immediately starts operating in its peak current mode, where it continuously senses the current at the switch’s power terminal. When the current reaches the peak value, the device starts working in valley current mode. In valley current mode, the converter switches between two operating points: the high side and the low side. When the voltage at the power terminal is greater than the high side operating point, the switch opens, and the current decreases to a certain value below the peak value. Similarly, when the voltage falls below the low side switching point, the switch re-closes, and the current increases to the peak point until it reaches the current limit. This process is repeated until the device is turned off.

UCC38085PWG4 is also integrated with several other features for improved performance and cost savings. These include a voltage reference for regulating output voltage and an adjustable soft start for power-up sequence optimization. The device also has a leading/trailing edge blanking circuit that enables it to detect and respond faster to the switching transient. This protects the converter from the surge of current during its startup.

In conclusion, UCC38085PWG4 is a highly specialized power management IC designed for applications in offline switchers and AC/DC converters. Its wide input voltage range and current operation, combined with its high level of features, make it the perfect choice for a range of applications, as it is able to offer excellent performance, energy efficiency, and cost-savings. This device also features an adjustable soft start, leading/trailing edge blanking, and an overcurrent protection circuit, ensuring it is well-equipped to meet the requirements of its customers.

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