UC3852

UC3852图片1
UC3852概述

高功率因数前置稳压器

The UC1852 provides a low-cost solution to active power-factor correction PFC for systems that would otherwise draw high peak current pulses from AC power lines. This circuit implements zero-current switched boost conversion, producing sinusoidal input currents with a minimum of external components, while keeping peak current substantially below that of fully-discontinuous converters.

The UC1852 provides controlled switch on-time to regulate the output bulk DC voltage, an off-time defined by the boost inductor, and a zero-current sensing circuit to reactivate the switch cycle. Even though switching frequency varies with both load and instantaneous line voltage, it can be maintained within a reasonable range to minimize noise generation.

While allowing higher peak switch currents than continuous PFCs such as the UC1854, this device offers less external circuitry and smaller inductors, yet better performance and easier line-noise filtering than discontinuous current PFCs with no sacrifice in complexity or cost. The ability to obtain a power factor in excess of 0.99 makes the UC1852 an optimum choice for low-cost applications in the 50 to 500 watt power range. Protection features of these devices include under-voltage lockout, output clamping, peak-current limiting, and maximum-frequency clamping.

The UC1852 family is available in 8-pin plastic and ceramic dual in-line packages, and in the 8-pin small outline IC package SOIC. The UC1852 is specified for operation from -55°C to +125°C, the UC2852 is specified for operation from -40°C to +85°C, and the is specified for operation from 0°C to +70°C.

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Low-Cost Power Factor Correction
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Power Factor Greater Than 0.99
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Few External Parts Required
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Controlled On-Time Boost PWM
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Zero-Current Switching
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Limited Peak Current
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Min and Max Frequency Limits
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Starting Current Less Than 1mA
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High-Current FET Drive Output
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Under-Voltage Lockout
UC3852中文资料参数规格
其他

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符合标准

RoHS标准 RoHS Compliant

含铅标准 Lead Free

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在线购买UC3852
型号: UC3852
制造商: TI 德州仪器
描述:高功率因数前置稳压器
替代型号UC3852
型号/品牌 代替类型 替代型号对比

UC3852

TI 德州仪器

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当前型号

UC2852

德州仪器

功能相似

UC3852和UC2852的区别

UC1852

德州仪器

功能相似

UC3852和UC1852的区别

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