UC3847DW

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UC3847DW is a family of pulse width modulation (PWM) controllers for DC to DC switching regulators. Developed by Texas Instruments, this family of PWM controllers provides enhanced system reliability and improved energy efficiency. It is designed to be used as a high performance PWM switching regulator for high performance applications. It features an integrated logic circuit and high performance optocouplers. This makes it suitable for use in industrial, commercial and residential applications.

UC3847DW Application Field

The UC3847DW is suitable for a wide range of DC to DC switching applications, including step-down, step-up and flyback converters, as well as resonant and active-clamp designs. Due to their high efficiency, low EMI and reliability, these controllers are ideal for automotive, medical and industrial power supply applications. Additionally, the UC3847DW family can also be used for DC-DC point-of-load (POL) voltage regulators and power supply systems and high-performance battery-operated equipment.

UC3847DW Working Principle

The UC3847DW family of controllers works on a pulse width modulation (PWM) technique to generate a well-regulated output. When operating the UC3847DW in PWM mode, a signal is generated by a voltage feedback comparator placed between the output (FB) and the reference voltage inputs (VREF). When the output voltage reaches the reference voltage, the comparator output signal is activated and turns on the main winding switch. This in turn causes power transfer to the output, thus regulating the output voltage.

In addition to the PWM Mode, the UC3847DW also provides a variety of features that can be utilized to reduce overall system complexity. The features include under-voltage lockout (UVLO), an adjustable switching frequency, a current limit circuit, an adjustable soft-start time, and a temperature-compensated feedback voltage. These features make the UC3847DW an ideal choice for high-power DC/DC switching regulator applications.

The UC3847DW family of PWM controllers are compact and versatile, making them well-suited for a wide range of applications. With wide input voltage range, low power consumption and integrated logic circuits, the UC3847DW is an ideal solution for high performance, high efficiency DC to DC switching applications.

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