IRDC3475

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The IRDC3475 is an Integrated Power Module suited for high-power synchronous rectification in a single-stage power supply as well as a wide range of applications. Offering current ratings from 50A to 60A, it provides the necessary protections against leakage current, overdose and overtemperature. Featuring an embedded controller and a high efficient rectifier circuit, this versatile component provides dynamic activation, precise sensing and precise regulation.

The IRDC3475 is designed to be used in off-line Switch Mode Power Supplies (SMPS) applications such as DC/DC or AC/DC converters, which require power up to 300W. This particular component is most commonly used for providing efficient power conversion in applications like servers, networking systems, telecom base stations, DVRs, uninterruptible power supplies (UPSs), engine starts, and automotive systems, among many others. The IRDC3475 provides a comprehensive package of features and capabilities to enable the design of applications requiring maximum power efficiency and flexibility.

The IRDC3475 is an integrated device that incorporates a half-bridge rectifier, a current sensing element, a voltage regulation loop with pulse-width modulated (PWM) controller and a synchronous rectifier control circuitry. Its brushless topology decreases power dissipation and noise and its advanced PWM controller increases efficiency. The sensing circuits used in the IRDC3475 are designed for better accuracy and superior immunity to noise. This eliminates the need for an optocoupler and separate control circuit to provide the necessary feedback for synchronous rectification.

The IRDC3475 utilizes two stages of rectification: the primary rectification stage is performed by a half-bridge rectifier consisting of two diodes across each output. The second-order rectification stage utilizes two internal Mosfets and is operated to maintain a constant power supply voltage across the primary rectifier. The IRDC3475 also features reverse current protection that minimizes power wasted due to diode conduction in the off-state. In addition, the IRDC3475 includes several protections, such as over-temperature protection and an undervoltage lockout (UVLO).

Another useful feature of the IRDC3475 is its Voltage Mode programming, which can be used to vary the output voltage. This makes it suitable for a wide range of applications. Additionally, this component supports several operating and protection modes and can be synchronized with an external clock. This synchronous rectification control allows for higher power output to be achieved with improved efficiency in off-line SMPS applications.

The IRDC3475 is a versatile and cost-effective integrated solution for a number of applications. Its high efficiency, wide operating temperature range, and variety of protection functions make it ideal for those looking for an efficient, low-cost solution to their power conversion needs. As such, it is a highly suitable component for DC/DC or AC/DC off-line SMPS applications.

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