UC2852_TI 温度范围为 –40°C 至 85°C 的双极性转换模式 PFC 控制器

UC2852的基本参数

制造厂商：TI
产品类别：电源管理
技术类目：交流/直流和隔离式直流/直流开关稳压器 - 功率因数校正 (PFC) 控制器
功能描述：温度范围为 –40°C 至 85°C 的双极性转换模式 PFC 控制器
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UC2852的产品详情：

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 UC3852 is specified for operation from 0°C to +70°C.

UC2852的优势和特性：

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

UC2852的参数（英文）：

Topology
Boost
Control mode
TM
Practical operating frequency (Max) (MHz)
0.2
UVLO thresholds on/off (V)
16.3/11.5
Device type
Controllers
Operating supply current (mA)
6
Features
< 150W Applications, Peak Current Mode, Transition Control Mode
Rating
Catalog
Operating temperature range (C)
-40 to 85

UC2852具体的完整产品型号参数及价格（美元）：

UC2852的完整型号有：UC2852D、UC2852DTR、UC2852N，以下是这些产品的关键参数及官网采购报价：

UC2852D，工作温度：-40 to 85，封装：SOIC (D)-8，包装数量MPQ：75个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UC2852D的批量USD价格：2.233（1000+）

UC2852DTR，工作温度：-40 to 85，封装：SOIC (D)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网UC2852DTR的批量USD价格：1.902（1000+）

UC2852N，工作温度：-40 to 85，封装：PDIP (P)-8，包装数量MPQ：50个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：NIPDAU，TI官网UC2852N的批量USD价格：2.481（1000+）

UC2852的评估套件：

UC2852的电路图解：

UC2852的评估套件：