UCC3818DW

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Power factor correction (PFC) is an important process in the design of power systems. It is used to correct power factor and to reduce losses in power transmission lines. The UCC3818DW is a power factor correction (PFC) integrated circuit (IC) that is designed to provide regulated AC power to integrated circuits, such as DC-DC converters, while also providing power factor correction and efficient operation. UCC3818DW has a wide range of applications, including LED lighting systems, mobile devices, battery chargers, power supplies and smart power systems.

UCC3818DW is built on an advanced core integrated circuit that is optimized for high efficiency and power factor correction. It provides input power protection, over-voltage, over-current and over-temperature protection, as well as output voltage and current balance. It also includes a low noise, high voltage and current operational amplifier, as well as a wide range of phase shift control functions. It is also able to provide power factor correction for both single phase and three phase power systems.

UCC3818DW is a bipolar IC that is available in a 16-pin DIP package. It is designed to provide power factor correction in a wide range of voltage and current operating conditions. The operating temperature range is -40°C to +125°C and the supply voltage range is 4.5V to 25V. UCC3818DW features an adjustable frequency range of 150Hz to 1GHz, and an adjustable power factor range of 0.6 leading to 0.99. It also provides two independent error amplifier bias currents to stabilize operation in challenging conditions.

UCC3818DW can provide high switching frequency and wide modulation range, due to its advanced driver circuit. This enables the duty cycle of the output PWM waveform to be finely adjusted to ensure low losses and high efficiency. The IC is also capable of interfacing with the load through its source follower output, which is designed to minimize switching losses. The integrated circuits also provide a low noise and low distortion operation, due to their low power consumption.

UCC3818DW also includes an integrated voltage-mode PFC circuit. This allows the device to operate with high current and voltage gains and low losses for both AC and DC loading. The device also includes an integrated soft-start circuit, which can be used to reduce the inrush current of large capacitors and other input power sources. It also features an adjustable current limit and current sense resistor, allowing the output current to be monitored and controlled.

In summary, UCC3818DW is a power factor correction IC that provides high efficiency, low losses and low distortion, while also providing power factor correction and thermal overload protection. It is designed to meet the demanding needs of power system applications and is available in a 16-pin DIP package. It features adjustable switching frequency, adjustable power factor, voltage/current monitoring, adjustable current limit and current sense circuits, as well as a low noise and low power consumption for high performance operation.

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