UC3867DWTR

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UC3867DWTR is an intelligent, low cost, pulse-width modulation (PWM) switching controller designed to optimize the electrical power efficiency of any step-down DC-to-DC power converter. The device provides a number of features that make it suitable for a wide variety of power conversion applications, including precision on-time regulation, Brown-Out protection, peak current limiting, and thermal shut down protection.

UC3867DWTR belongs to the family of DC DC Switching Controllers, which are specifically designed to regulate the power flow in DC power converters, such as AC/DC adapters, uninterruptible power supplies, and other DC-to-DC applications. These devices integrate several features that enable a power supply to more accurately and efficiently regulate the output voltage and current of a given power supply.

The UC3867DWTR, a part of the UC3800 series, is a highly efficient, reliable and cost-effective alternative to a wide range of integrated transformer-based and switch-mode voltage regulator applications. It is specifically designed to provide the highest efficiency, accuracy and system performance, while minimizing component and PCB component count through the use of digital PWM control.

The UC3867DWTR is specified to work over a wide temperature range of -40°C to +125°C and is built using advanced CMOS process technology. The device’s PWM control circuit is designed to allow the power converter to operate in both current mode and voltage mode. This high level of accuracy is accomplished by using a high-resolution 16-bit PWM control algorithm.

At the heart of the UC3867DWTR is a Power Mode circuit which enables the device to switch between two operating modes depending on the load demand. The device has two modes: pulse-width modulation (PWM) and forced continuous conduction (FCC). PWM mode is used for high load currents and provides high efficiency, while FCC is optimized for low load currents and offers low ripple operation.

The UC3867DWTR also features an advanced protection scheme which includes thermal shutdown protection, under-voltage lock-out (UVLO), automatic under-voltage protection (AUP), and an adjustable current limit protection (CLP). All these features are provided in order to prevent the power converter from over-heating, short-circuit, and other surge conditions, ensuring safe and reliable operation.

In conclusion, the UC3867DWTR is a highly efficient, low-cost and reliable DC DC switching controller. Its on-time regulation, Brown-Out protection, peak current limiting, and thermal shut down protection features make it well suited for a wide range of power conversion applications.

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