ZHCSPG3A May   2008  – July 2022 UC2843A-Q1

PRODUCTION DATA  

  1. 特性
  2. 应用
  3. 说明
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Electrical Characteristics
    5. 6.5 Thermal Information
    6. 6.6 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Pulse-by-Pulse Current Limiting
      2. 7.3.2 Current Sense Circuit
      3. 7.3.3 Error Amplifier Configuration
      4. 7.3.4 Undervoltage Lockout
      5. 7.3.5 Oscillator
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation
      2. 7.4.2 Undervoltage Lockout (UVLO) Start-Up
      3. 7.4.3 UVLO Turnoff Mode
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 Custom Design With WEBENCH® Tools
      2. 11.1.2 Device Nomenclature
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Related Links
    4. 11.4 接收文档更新通知
    5. 11.5 支持资源
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 术语表
  12. 12Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

说明

UC2843A-Q1 控制器件是 UC2843 的引脚对引脚兼容改进版本。该器件提供了控制开关模式电源电流模式所必需的功能,并且具备下述改进的特性。规定的启动电流不到 0.5mA。振荡器放电电流调整为 8.3mA。欠压锁定期间,输出级可在 VCC 高于 5V 时,以低于 1.2V 的电压灌入至少 10mA 的电流。

器件信息(1)
器件型号封装封装尺寸(标称值)
UC2843A-Q1SOIC (8)5.80mm × 4.81mm
如需了解所有可用封装,请参阅数据表末尾的可订购产品附录。
器件比较表
器件UVLO ONUVLO OFF最大占空比
UC2843A-Q18.5V7.9V<100%
GUID-CCADA895-41C8-456C-96FB-20E2FB85EB61-low.gif简化版应用图