LFA75F-3R3-SNY

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AC DC Converters

AC/DC converters serve a wide array of application fields and have a great importance to electrical engineering. A modern AC/DC converter is a highly efficient, reliable, and cost-effective device, capable of delivering a consistent output of power regardless of the input signal level. The LFA75F-3R3-SNY is one such example – a highly efficient, full-range AC/DC converter designed to meet the needs of modern industrial markets.

The LFA75F-3R3-SNY is an ultra-low power, full-range AC/DC converter providing a wide input voltage range of 85 Vac to 265 Vac with a 3.3V output. This converter features high efficiency (greater than 94%) and is capable of delivering up to 4 watts of continuous output power. It also features power factor correction (PFC) of up to 0.99, EMI filtering, and comprehensive protection features including short-circuit, over-voltage, over-temperature, and over-current protections. Additionally, the LFA75F-3R3-SNY has an operating temperature range of -10°C to 65°C.

The core of the LFA75F-3R3-SNY is a full-bridge, four-phase switched capacitor converter topology. This type of topology is efficient, reliable, and cost-effective, enabling the converter to provide a wide range of output voltages without requiring bulky transformers. The duty cycle of the output voltage is adjusted using a voltage-mode, pulse-width modulation (PWM) control. This method of control is an effective way of regulating the output voltage, as it can quickly respond to changes in the input signal level.

The LFA75F-3R3-SNY also features additional control functions to further improve its performance. These features include a soft-start function, a variable frequency operation to minimize audible noise, and precise voltage regulation and line regulation. Additionally, it also includes integrated current-mode feedback for improved dynamic performance.

The LFA75F-3R3-SNY is an ultra-efficient, full-range AC/DC converter capable of delivering up to 4 watts of continuous output power. It has a wide input voltage range, excellent protection features and is ideal for a range of industrial applications. The LFA75F-3R3-SNY’s full-bridge topology, voltage-mode PWM control, and additional control features make it the perfect choice for high power, efficient, and reliable applications.

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