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UC1843-SP

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Radiation-tolerant, QML-V, 30V input, 1A single-output 500kHz PWM controller, 100% duty cycle

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数据表

UC1843-SP

正在供货
数据表 立即订购

产品详情

Topology Boost, Flyback, Forward Control mode Current Features Error amplifier, Fixed frequency, Multi-topology Duty cycle (max) (%) 100
Topology Boost, Flyback, Forward Control mode Current Features Error amplifier, Fixed frequency, Multi-topology Duty cycle (max) (%) 100
LCCC (FK) 20 79.0321 mm² (— mm × — mm) CDIP (JG) 8 64.032 mm² (— mm × — mm) DIESALE (KGD) — See data sheet
  • QML-V Qualified, SMD 5962-86704
  • Rad-Tolerant: 50 kRad (Si) TID (ELDRS Free)(1)
  • Controlled Baseline
  • Optimized For Off-line and DC-to-DC Converters
  • Low Start-Up Current (<1 mA)
  • Automatic Feed Forward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Under-Voltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High Current Totem Pole Output
  • Internally Trimmed Bandgap Reference
  • 500-kHz Operation
  • Low RO Error Amp

(1) Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad/sec. Radiation Lot Acceptance Testing is available - contact factory for details.
  • QML-V Qualified, SMD 5962-86704
  • Rad-Tolerant: 50 kRad (Si) TID (ELDRS Free)(1)
  • Controlled Baseline
  • Optimized For Off-line and DC-to-DC Converters
  • Low Start-Up Current (<1 mA)
  • Automatic Feed Forward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Under-Voltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High Current Totem Pole Output
  • Internally Trimmed Bandgap Reference
  • 500-kHz Operation
  • Low RO Error Amp

(1) Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad/sec. Radiation Lot Acceptance Testing is available - contact factory for details.

The UC1843 family of control devices provides the necessary features to implement off-line or dc-to-dc fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 1 mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off state. The under-voltage lockout threshold is 8.4 V and maximum duty cycle range is around 100%.

The UC1843 family of control devices provides the necessary features to implement off-line or dc-to-dc fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 1 mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off state. The under-voltage lockout threshold is 8.4 V and maximum duty cycle range is around 100%.
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技术文档

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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 QML Class V, Current-Mode PWM Controller 数据表 2010-3-25
* 辐射与可靠性报告 UC1843-SP Radiation Test Report 2014-11-25
* SMD UC1843-SP SMD 5962-86704 2016-7-8
选择指南 TI Space Products (Rev. L) 2026-3-27
应用手册 气密性封装回流焊曲线、端接镀层以及引线裁切与成型 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2025-11-20
应用简报 经 DLA 批准的 QML 产品优化 (Rev. C) PDF | HTML 英语版 (Rev.C) PDF | HTML 2025-8-18
应用手册 重离子轨道环境单粒子效应估算 (Rev. B) PDF | HTML 英语版 (Rev.B) PDF | HTML 2025-7-7
更多文献资料 TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. B) 2025-2-20
应用手册 QML flow, its importance, and obtaining lot information (Rev. C) 2023-8-30
应用手册 单粒子效应置信区间计算 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2022-12-2
电子书 电子产品辐射手册 2022-5-7
应用简报 Controlling Input Power for Present and Next-Generation Power Controllers PDF | HTML 2020-12-14
应用手册 DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer 2020-8-21
技术文章 Power Tips: Calculate an R-C snubber in seven steps PDF | HTML 2016-5-5
应用手册 U-100A UC3842/3/4/5 提供低成本电流模式控制 英语版 2010-7-28
应用手册 DN-62 开关电源拓扑电压模式与 电流模式 英语版 2010-7-28
应用手册 UCC38C42 系列高速 BiCMOS 电流模式 PWM 控制器 2002-2-7
应用手册 DN-65 Considerations in Powering BiCMOS ICs 1999-9-5
应用手册 DN-27 UC1842/UC1842A Family - Summary of Functional Differences 1999-9-5
应用手册 DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit 1999-9-5
应用手册 DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty 1999-9-5
应用手册 DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection 1999-9-5
应用手册 U-111, Practical Considerations in Current Mode Power Supplies 1999-9-5
应用手册 Modeling, Analysis and Compensation of the Current-Mode Converter 1999-9-5
应用手册 DN-30 Programmable Electronic Circuit Breaker 1999-9-5
应用手册 DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers 1999-9-5

设计与开发

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仿真模型

UC1843A-SP Unencrypted PSpice Transient Model

SLUM660.ZIP (3 KB) - PSpice 模型
支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
LCCC (FK) 20 Ultra Librarian
CDIP (JG) 8 Ultra Librarian
DIESALE (KGD) — Ultra Librarian
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