UC3871DWG4

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UC3871DWG4 is a Power Factor Controller (PFC) IC designed for single stage Power Factor Correction circuits in Constant Voltage (CV) and Constant Current (CC) LED lighting applications. It features an internal MOSFET, a wide operating input voltage range, PFC operation and efficient current limiting. The UC3871DWG4 is specially designed for LED lighting with power levels up to 25 W. It is based on a sophisticated control algorithm and utilizes a 6-pin SOT223 package.

The UC3871DWG4 is a single stage PFC IC with an integrated MOSFET that is configured to operate in either a CV or CC mode. In CV mode, it will regulate the output voltage of the LED driver, while in CC mode it will regulate the current flowing through the LED driver. The MOSFET is configured to provide low on-resistance and high efficiency, while the internal current limiting ensures that the device will not be damaged during overload conditions. The IC is also capable of auto-restart in the event of over-current or over-voltage conditions.

The UC3871DWG4 features a quiescent current of less than 50µA, which allows for reduced power consumption during standby. It also has a wide operating input voltage range from 30V to 500V, which makes it suitable for a variety of applications. The IC has internal voltage and current sensing which allows for high accuracy and fast response for operation in CV and CC mode. The internal PFC algorithm ensures that the operation of the device is power factor corrected, resulting in higher efficiency and reduced power losses. The IC also provides a low-noise operation, as well as thermal overload protection.

The UC3871DWG4 is ideal for use in LED lighting applications, particularly Constant Voltage and Constant Current LED lighting applications. The IC can be used in a wide variety of LED lighting products including LED bulbs, LED streetlights, LED floodlights and LED light bars. The IC is also suitable for use in backlight units, LED displays, LED signage, LED lighting systems and LED lighting fixtures.

In summary, the UC3871DWG4 is a single stage PFC IC designed for Constant Voltage and Constant Current LED lighting applications. It features an integrated MOSFET, wide input voltage range, PFC operation and current limiting. The IC also provides high accuracy current and voltage sensing, low standby current, low noise operation and thermal overload protection.

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