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AC/DC 控制器

UC1843-SP

現行

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

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產品規格表

UC1843-SP

現行
產品規格表 立即訂購

產品詳細資料

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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技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 QML Class V, Current-Mode PWM Controller datasheet 2010/3/25
* 輻射及可靠性報告 UC1843-SP Radiation Test Report 2014/11/25
* SMD UC1843-SP SMD 5962-86704 2016/7/8
選擇指南 TI Space Products (Rev. L) 2026/3/27
應用說明 Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form (Rev. A) PDF | HTML 2025/11/5
Application brief DLA Approved Optimizations for QML Products (Rev. C) PDF | HTML 2025/6/17
應用說明 Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. B) PDF | HTML 2025/6/10
更多文件說明 TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. B) 2025/2/20
應用說明 QML flow, its importance, and obtaining lot information (Rev. C) 2023/8/30
應用說明 Single-Event Effects Confidence Interval Calculations (Rev. A) PDF | HTML 2022/10/19
Application brief Controlling Input Power for Present and Next-Generation Power Controllers PDF | HTML 2020/12/14
應用說明 DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer 2020/8/21
電子書 Radiation Handbook for Electronics (Rev. A) 2019/5/21
技術文章 Power Tips: Calculate an R-C snubber in seven steps PDF | HTML 2016/5/5
應用說明 UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers 2002/2/7
應用說明 DN-65 Considerations in Powering BiCMOS ICs 1999/9/5
應用說明 DN-27 UC1842/UC1842A Family - Summary of Functional Differences 1999/9/5
應用說明 DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit 1999/9/5
應用說明 DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty 1999/9/5
應用說明 DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection 1999/9/5
應用說明 U-111, Practical Considerations in Current Mode Power Supplies 1999/9/5
應用說明 U-100A UC3842/3/4/5 Provides Low-Cost Current-Mode Control 1999/9/5
應用說明 Modeling, Analysis and Compensation of the Current-Mode Converter 1999/9/5
應用說明 DN-30 Programmable Electronic Circuit Breaker 1999/9/5
應用說明 DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers 1999/9/5
應用說明 DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 1999/9/5

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模擬型號

UC1843A-SP Unencrypted PSpice Transient Model

SLUM660.ZIP (3 KB) - PSpice 模型
支援產品和硬體
封裝 針腳 CAD 符號、佔位空間與 3D 模型
LCCC (FK) 20 Ultra Librarian
CDIP (JG) 8 Ultra Librarian
DIESALE (KGD) — Ultra Librarian
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