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UC3842D

  • 描述:输出类别: 晶体管驱动器 拓扑结构: Boost,Flyback 输出配置: 阳性,可隔离 开关频率: 高达500千赫兹 供应商设备包装: 14-SOP
  • 品牌: 安盛美 (onsemi)
  • 交期:5-7 工作日
渠道:
  • 自营
  • 得捷
  • 贸泽

起订量: 1

  • 库存: 9000
  • 单价: ¥23.19177
  • 数量:
    - +
  • 总计: ¥23.19
在线询价

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规格参数

  • 输出类别 晶体管驱动器
  • 输出数量 one
  • 输出阶段 one
  • 功能 上一步,上一步/下一步
  • 输出配置 阳性,可隔离
  • 拓扑结构 Boost,Flyback
  • 串口 -
  • 电源电压 (Vcc/Vdd) 10伏~30伏
  • 开关频率 高达500千赫兹
  • 安装类别 表面安装
  • 同步整流装置
  • 时钟同步
  • 控制功能特性 频率控制
  • 工作温度 0摄氏度~70摄氏度(TA)
  • 制造厂商 安盛美 (onsemi)
  • 部件状态 过时的
  • 最大占空比 97%
  • 包装/外壳 14-SOIC(0.209“,5.30毫米宽)
  • 供应商设备包装 14-SOP

UC3842D 产品详情

The UCx84x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. The internally implemented circuits include an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator that also provides current-limit control, and a totem-pole output stage that is designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.

The UCx84x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of turnon and turnoff thresholds and hysteresis ranges. Devices with higher turnon or turnoff hysteresis are ideal choices for off-line power supplies, while the devices with a narrower hysteresis range are suited for DC-DC applications. The UC184x devices are specified for operation from –55°C to 125°C, the UC284x series is specified for operation from –40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C.

Feature

  • Optimized for Off-Line and DC-to-DC Converters
  • Low Start-Up Current (< 1 mA)
  • Automatic Feedforward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load-Response Characteristics
  • Undervoltage Lockout With Hysteresis
  • Double-Pulse Suppression
  • High-Current Totem-Pole Output
  • Internally Trimmed Bandgap Reference
  • Up to 500-kHz Operation
  • Error Amplifier With Low Output Resistance
Description

The UCx84x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. The internally implemented circuits include an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator that also provides current-limit control, and a totem-pole output stage that is designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.

The UCx84x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of turnon and turnoff thresholds and hysteresis ranges. Devices with higher turnon or turnoff hysteresis are ideal choices for off-line power supplies, while the devices with a narrower hysteresis range are suited for DC-DC applications. The UC184x devices are specified for operation from –55°C to 125°C, the UC284x series is specified for operation from –40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C.

UC3842D所属分类:DC - DC开关控制器,UC3842D 由 安盛美 (onsemi) 设计生产,可通过久芯网进行购买。UC3842D价格参考¥23.191766,你可以下载 UC3842D中文资料、PDF数据手册、Datasheet数据手册功能说明书,可查询UC3842D规格参数、现货库存、封装信息等信息!

安盛美 (onsemi)

安盛美 (onsemi)

onsemi正在推动节能创新,使客户能够减少全球能源使用。该公司提供全面的节能电源和信号管理、逻辑、离散和定制解决方案组合,以帮助设计工程师解决其在汽车、通信、计算、消费、工业、LED照明、医疗、军事/...

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