UC2853中文资料温度范围为 –25°C 至 85°C 的 75kHz 双极连续导通模式 (CCM) PFC 控制器数据手册TI规格书

描述 Description

The UC3853 provides simple, yet high performance active power factor correction. Using the same control technique as the UC1854, this 8-pin device exploits a simplified architecture and an internal oscillator to minimize external component count. The UC3853 incorporates a precision multiplier/squarer/divider circuit, voltage and current loop error amplifiers, and a precision voltage reference to implement average current mode control with RMS line voltage compensation. This control technique maintains constant loop gain with changes in input voltage, which minimizes input line current distortion over the worldwide input voltage range. The internal 75kHz oscillator includes an external clock input, allowing synchronization to downstream converters. Additionally, the device features an overvoltage protection comparator, a clamped MOSFET gate driver which self-biases low during undervoltage lockout, and low startup and supply current. These devices are available in 8-pin plastic and ceramic dual in-line (DIP) packages, and 8-lead small outline (SOIC) packages. The UC1853 is specified for operation from \\x9655°C to +125°C, the UC2853 is specified for operation from \\x9625°C to +85°C, and the UC3853 is specified for operation from 0°C to +70°C.

特性 Features

• Complete 8-pin Power Factor Solution
• Reduced External Components
• RMS Line Voltage Compensation
• Precision Multiplier/Squarer/Divider
• Internal 75kHz Synchronizable Oscillator
• Average Current Mode PWM Control
• Overvoltage Protection Comparator
• High Current, Clamped Gate Driver

简介

UC2853属于集成电路（IC）的PFC（功率因数校正）。由TI制造生产的UC2853PFC（功率因数校正）功率因数校正 (PFC) 是用于调整交流电路中的电压和电流之间的相位角，使之趋近于零的半导体器件。不同模式包括平均电流、边界导通、连续导通、临界导通、电流控制式频率折返、不连续和不连续导通，开关频率从 6 kHz 至 1.7 MHz 可调。