UCC2808DTR-1 Integrated Circuits (ICs)

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The UCC2808DTR-1 is a device belonging to the power management integrated circuit (PMIC) AC DC Converters, Offline Switchers family. It is designed to enhance system performance, ensure faster power-up, reduce power-down and save system costs. This device provides a voltage regulator, voltage and current monitor, pulse width modulator (PWM) switch control and thermal shutoff.

This device uses a unique current mirroring technique to minimize current and voltage variability over the entire load range while maintaining a high stability level. The 500 mV precision reference voltage and the current mirroring enable the device to control the output voltage accurately. The output voltage is set by a programmable resistor divider network that also sets the short-circuit current limit threshold in order to enhance system protection.

The UCC2808DTR-1 is used to generate secondary outputs (VDD and VDDQ) that supply main and sub processors in a system. The voltage frequency modulation (VFM) mode is used to modify the output voltage of the converter and hence provide an adjustable output voltage. In addition to this, this device provides PWM and Mode Control (MC), which is used to control the quasi-resistive current while maintaining a constant voltage in order to improve system performance. Combined, all of these features enable the device to achieve a high system efficiency.

The UCC2808DTR-1 features extensive protection features that prevent short-circuiting, over-voltage, over-current and over-temperature conditions. The intelligent thermal shutdown (TSD) prevents thermal runaway and provides the user with a safety feature. Additionally, the Auto PWM (APWM) mode creates a smooth transition from PWM to mode control when the load current is varying over a set threshold. This reduces unwanted voltage ripple, improves system performance and increases power efficiency.

The UCC2808DTR-1 application field and working principle makes it an ideal device for modern systems, such as personal computers, servers and telecommunications equipment. Its unique current mirroring coupled with its comprehensive protection system makes it the perfect choice for controlling and monitoring AC/DC converters and offline switchers. Its VFM mode enables the output voltage to be adjusted according to the load and its APWM mode ensures that the load current is maintained properly. Thus, the UCC2808DTR-1 helps to optimize system performance, maximize power efficiency and reduce system cost.

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