TI代理,常备极具竞争力的充足现货
TI哪些型号被关注? TI热门产品型号
UC3855B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:具有 10.5V/10V UVLO 和零电压转换模式、温度范围为 0°C 至 70°C 的双极性 CCM PFC 控制器
  • 点击这里打开及下载UC3855B的技术文档资料
  • TI代理渠道,提供当日发货、严格的质量标准,满足您的目标价格
快速报价,在行业拥有较高的知名度及影响力
UC3855B的产品详情:

The UC3855A/B provides all the control features necessary for high power, high frequency PFC boost converters. The average current mode control method allows for stable, low distortion AC line current programming without the need for slope compensation. In addition, the UC3855 utilizes an active snubbing or ZVT (Zero Voltage Transition technique) to dramatically reduce diode recovery and MOSFET turn-on losses, resulting in lower EMI emissions and higher efficiency. Boost converter switching frequencies up to 500kHz are now realizable, requiring only an additional small MOSFET, diode, and inductor to resonantly soft switch the boost diode and switch. Average current sensing can be employed using a simple resistive shunt or a current sense transformer. Using the current sense transformer method, the internal current synthesizer circuit buffers the inductor current during the switch on-time, and reconstructs the inductor current during the switch off-time. Improved signal to noise ratio and negligible current sensing losses make this an attractive solution for higher power applications.

The UC3855A/B also features a single quadrant multiplier, squarer, and divider circuit which provides the programming signal for the current loop. The internal multiplier current limit reduces output power during low line conditions. An overvoltage protection circuit disables both controller outputs in the event of a boost output OV condition.

Low startup supply current, UVLO with hysteresis, a 1% 7.5V reference, voltage amplifier with softstart, input supply voltage clamp, enable comparator, and overcurrent comparator complete the list of features. Available packages include: 20 pin N, DW, Q, J, and L.

UC3855B的优势和特性:
  • Controls Boost PWM to Near Unity Power Factor
  • Fixed Frequency Average Current Mode Control Minimizes Line Current Distortion
  • Built-in Active Snubber (ZVT) Allows Operation to 500kHz, Improved EMI and Efficiency
  • Inductor Current Synthesizer allows Single Current Transformer Current Sense for Improved Efficiency and Noise Margin
  • Accurate Analog Multiplier with Line Compensator allows for Universal Input Voltage Operation
  • High Bandwidth (5MHz), Low Offset Current Amplifier
  • Overvoltage and Overcurrent protection
  • Two UVLO Threshold Options
  • 150&mirco;A Startup Supply Current Typical
  • Precision 1% 7.5V Reference
UC3855B的参数(英文):
  • Topology
  • Boost
  • Control mode
  • CCM
  • Practical operating frequency (Max) (MHz)
  • 0.5
  • UVLO thresholds on/off (V)
  • 10.5/10
  • Device type
  • Controllers
  • Operating supply current (mA)
  • 17
  • Features
  • > 750W Applications, Average Current Mode, Continuous Control Mode , Enable, OVP
  • Rating
  • Catalog
  • Operating temperature range (C)
  • 0 to 70
UC3855B具体的完整产品型号参数及价格(美元):

UC3855B的完整型号有:UC3855BDW、UC3855BDWTR、UC3855BN,以下是这些产品的关键参数及官网采购报价:

UC3855BDW,工作温度:0 to 70,封装:SOIC (DW)-20,包装数量MPQ:25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UC3855BDW的批量USD价格:6.622(1000+)

UC3855BDWTR,工作温度:0 to 70,封装:SOIC (DW)-20,包装数量MPQ:2000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UC3855BDWTR的批量USD价格:5.518(1000+)

UC3855BN,工作温度:0 to 70,封装:PDIP (N)-20,包装数量MPQ:20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UC3855BN的批量USD价格:7.449(1000+)

轻松满足您的TI芯片采购需求
UC3855B的评估套件:

UC3855BDW,工作温度:0 to 70,封装:SOIC (DW)-20,包装数量MPQ:25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UC3855BDW的批量USD价格:6.622(1000+)

UC3855BDWTR,工作温度:0 to 70,封装:SOIC (DW)-20,包装数量MPQ:2000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UC3855BDWTR的批量USD价格:5.518(1000+)

UC3855BN,工作温度:0 to 70,封装:PDIP (N)-20,包装数量MPQ:20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UC3855BN的批量USD价格:7.449(1000+)

TI代理|TI中国代理 - 国内领先的TI芯片采购平台
丰富的可销售TI代理库存,专业的销售团队可随时响应您的紧急需求,目标成为有价值的TI代理