uc3845中文资料应用

uc3845中文应用 时间:2015-04-15 21:12 来源:电工之家 作者:编辑部 双列8脚直插式或14脚贴片塑料封装。是高性能固定频率电流型控制器。它们是专门设计用于脱线工作和直流一直流变换器应用的，为 使用者提供了一种低成本、高效率外接元件最少的解决。这些集成电路包括振荡器、温度补偿参考源、高增益误差放大器、电流检测比较器及一个适合于驱动 MOS功率场效应晶体管(PFET)的理想的高电流图腾柱输出。 芯片还包括一系列保护特性，如具有滞后特性的输入和参考电压欠压锁定保护功能，逐个周期的限流保护，用于测量单个脉冲的锁存器和一个每隔一个振荡周期封闭脉冲输出的触发器——这就使得输出占空比可以在50,,70,范围内可调。 具有16 V(开启)和10 V(关闭)的欠压输 出锁定(UVLO)门限值。特别适用于脱线工作变换器。 uCX845是为低电压应用特别制造的，它具有8(5 V(开 启)和7(6 V(关闭)欠压输出锁定门限值。 其特点为 (1)电流模式工作，输出开关频率为500 kHz。 (2)输出占空比可从50,,70,调节。 (3)自动前馈补偿。 (4)逐个周期的限流保护，锁定式脉冲宽度调制(PWM)。 (5)有欠压锁定的内部调整参考源。 (6)高电流图腾柱式输出。 installation to be familiar with the drawings, and to be familiar with to order materials, know exactly what each part of the mullions used to avoid misattribution. Checks include the following the color is correct, oxide films if requested;section conforms to design including the height, angle, thickness, etclength requirementis easier to control, and therefore work both from a technical as well as management are particularly valued. 2. technology process: checks for vertical models, specifications, check the box in place, ferrule fixed Liang Xiaduan, and top bolted beam three dimensional adjustment. 3. basic operation: (1) check the vertical type and specification: before (7)带滞后的输入欠压锁定。 封装引脚图: installation to be familiar with the drawings, and to be familiar with to order materials, know exactly what each part of the mullions used to avoid misattribution. Checks include the following the color is correct, oxide films if requested;section conforms to design including the height, angle, thickness, etclength requirementis easier to control, and therefore work both from a technical as well as management are particularly valued. 2. technology process: checks for vertical models, specifications, check the box in place, ferrule fixed Liang Xiaduan, and top bolted beam three dimensional adjustment. 3. basic operation: (1) check the vertical type and specification: before installation to be familiar with the drawings, and to be familiar with to order materials, know exactly what each part of the mullions used to avoid misattribution. Checks include the following the color is correct, oxide films if requested;section conforms to design including the height, angle, thickness, etclength requirementis easier to control, and therefore work both from a technical as well as management are particularly valued. 2. technology process: checks for vertical models, specifications, check the box in place, ferrule fixed Liang Xiaduan, and top bolted beam three dimensional adjustment. 3. basic operation: (1) check the vertical type and specification: before installation to be familiar with the drawings, and to be familiar with to order materials, know exactly what each part of the mullions used to avoid misattribution. Checks include the following the color is correct, oxide films if requested;section conforms to design including the height, angle, thickness, etclength requirementis easier to control, and therefore work both from a technical as well as management are particularly valued. 2. technology process: checks for vertical models, specifications, check the box in place, ferrule fixed Liang Xiaduan, and top bolted beam three dimensional adjustment. 3. basic operation: (1) check the vertical type and specification: before 【互换 兼容】 CS3845 CW3845 KA3885脚同(FA13845N)FA13845P L3845 LM3845 ST3845UC UC3845W UC3845N脚同UC3845A installation to be familiar with the drawings, and to be familiar with to order materials, know exactly what each part of the mullions used to avoid misattribution. Checks include the following the color is correct, oxide films if requested;section conforms to design including the height, angle, thickness, etclength requirementis easier to control, and therefore work both from a technical as well as management are particularly valued. 2. technology process: checks for vertical models, specifications, check the box in place, ferrule fixed Liang Xiaduan, and top bolted beam three dimensional adjustment. 3. basic operation: (1) check the vertical type and specification: before