Overview
The UC3853 is a high-performance power factor correction (PFC) device designed to regulate power with high efficiency and reduced external components. It operates using average current mode control, incorporating advanced features to maintain consistent performance across a wide range of input voltages.
Key Features
Active Power Factor Correction: The UC3853 simplifies power factor correction by using a streamlined architecture, which results in a lower external component count.
RMS Line Voltage Compensation: This feature ensures minimal input line current distortion across different input voltage levels, maintaining constant loop gain.
Integrated Oscillator: An internal 75kHz oscillator, which can be synchronized with external clocks, provides flexibility and reduces external dependencies.
Comprehensive Protection: Features include overvoltage comparison and a clamped gate driver that is self-biased, offering protection and reliability.
Product Offering
Three different models are available: the UC1853, UC2853, and UC3853, targeting different temperature ranges suitable for a variety of applications.
Block Diagram Components
The contained block diagram illustrates the PFC device’s key internal components, such as the current amplifier, PWM comparator, error amplifiers, and voltage reference.
Absolute Maximum Ratings and Electrical Characteristics
The datasheet specifies detailed ratings for supply voltage, output drive current, input/output voltage and current limits, storage, and junction temperature. It also highlights crucial electrical characteristics, including undervoltage lockout, supply current, voltage loop error amplifier parameters, and PWM modulator gain.
Applications and Packaging
The UC3853 is intended for use in high-performance electronic applications requiring efficient power regulation. It is available in dual in-line (DIP) and small outline (SOIC) package options.
References:
Chat: Powered By VoiceSphere
Pricing & Distributors: https://www.datasheets360.com/part/detail/uc2853dtrg4/2112199252869331687/
