UC2875QP

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The UC2875QP is a industry-leading offline switch controller that provides a low-cost and easy-to-use platform for designing both ac/dc and dc/dc flyback switching power converter applications. As a AC DC Converters, Offline Switchers, the UC2875QP has a wide range of applications including telecommunication, computing, consumer electronics and industrial equipment.

Working principle is the UC2875QP utilizes primary side regulation to dynamically adjust the output voltage by monitoring the output rectifier diode using a simple current loop. It uses a built-in, voltage mode optimized pulse width modulation (PWM) to provide a stable DC output, with cycle-by-cycle current limiting, operating frequency and active/inactive time cycle time programmable. The PWM logic allows for maximum flexibility in system design, with adjustable fault mask time, latch/auto-restart and programmable over-voltage protection.

The UC2875QP is also very efficient. It has a wide input voltage range (85-265VAC) that supports universal AC inlet, spread spectrum with dimming, low startup current and active power factor correction (PFC). On the output side, the controller supports multiple output configurations with fast transient response and optimized turn-on/off transients. It also includes integrated voltage loop compensation, allowing for seamless integration with external components, such as transformers, inductors and capacitors.

In addition, the UC2875QP provides protection features for both input and output, including under-voltage lockout (UVLO), over-voltage protection (OVP), over-temperature protection (OTP) and output current limiting. It is a highly reliable controller with a high temperature rating of up to +125°C with no additional external components. With its integrated PFC, the controller is also highly energy-efficient, meeting many global energy efficiency standards.

The UC2875QP is an ideal solution for ac/dc and dc/dc flyback switching power converter applications. It provides a low-cost, easy-to-use platform for designs and is highly reliable and efficient. It supports a wide range of output configurations and protection features, and provides total system control with a voltage loop compensation feature.

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