UC3825ADWTR Integrated Circuits (ICs)

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UC3825ADWTR is a PWM based, high performance current mode controller. It is mainly used in pulse width modulation (PWM) switching power supply applications.

Application field

This product is widely used in major areas including consumer markets, telecommunications, computing, communications, consumer and industrial control. The most common uses in consumer electronics include consumer and professional audio, broadcast, television and VCR’s. It is also widely used in high performance mono and multi-channel power amplifiers, DC-DC converters and supplies.

Working Principle

UC3825ADWTR mainly based on current mode control topology, making it ideal for current limit and fast transient response control. This product offers a wide range of operating frequencies and an easily programmable soft start feature. Its programmable ramp provides fast input voltage feed-through during a loss of power. This product uses voltage, current and temperature measurements of the current-mode control loop and provides a wide range of compensation strategies to achieve improved transient performance. Additionally, it offers an Auto-Restart loop to allow for reduced power consumption and increased system stability.

With an operating range extending from 4.5V to 36V and a maximum switching current up to 4.8A, this product is suitable for various types of power converter topologies, including off-line switching power supplies, on-line supplies and DC-DC converters. Its internal circuitry and parameters are also optimized for fast loop response and superior stability, ensuring highly reliable operation.

This product also features a fixed off-time and peak current mode control structure. This structure accurately controls peak current during the switching interval and provides an improved current limit response time. Additionally, this product offers a wide range of protection features, including over-temperature protection, over-current protection and synchronization. All these features make UC3825ADWTR one of the most reliable PWM DC-DC switching controllers in the market.

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