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UC1843-SP

AKTIV

Strahlungstol. PWM-Controller, QML-V, 30 V Eingang, 1 A Einzelausgang, 100 % Tastverhältnis, 500 kHz

Produktdetails

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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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt QML Class V, Current-Mode PWM Controller datasheet 25.03.2010
* Strahlungs- und Zuverlässigkeitsbericht UC1843-SP Radiation Test Report 25.11.2014
* SMD UC1843-SP SMD 5962-86704 08.07.2016
Auswahlhilfe TI Space Products (Rev. L) 27.03.2026
Anwendungshinweis Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form (Rev. A) PDF | HTML 05.11.2025
Application brief DLA Approved Optimizations for QML Products (Rev. C) PDF | HTML 17.06.2025
Anwendungshinweis Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. B) PDF | HTML 10.06.2025
Weitere Dokumente TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. B) 20.02.2025
Anwendungshinweis QML flow, its importance, and obtaining lot information (Rev. C) 30.08.2023
Anwendungshinweis Single-Event Effects Confidence Interval Calculations (Rev. A) PDF | HTML 19.10.2022
Application brief Controlling Input Power for Present and Next-Generation Power Controllers PDF | HTML 14.12.2020
Anwendungshinweis DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer 21.08.2020
E-book Radiation Handbook for Electronics (Rev. A) 21.05.2019
Technischer Artikel Power Tips: Calculate an R-C snubber in seven steps PDF | HTML 05.05.2016
Anwendungshinweis UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers 07.02.2002
Anwendungshinweis DN-65 Considerations in Powering BiCMOS ICs 05.09.1999
Anwendungshinweis DN-27 UC1842/UC1842A Family - Summary of Functional Differences 05.09.1999
Anwendungshinweis DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit 05.09.1999
Anwendungshinweis DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty 05.09.1999
Anwendungshinweis DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection 05.09.1999
Anwendungshinweis U-111, Practical Considerations in Current Mode Power Supplies 05.09.1999
Anwendungshinweis U-100A UC3842/3/4/5 Provides Low-Cost Current-Mode Control 05.09.1999
Anwendungshinweis Modeling, Analysis and Compensation of the Current-Mode Converter 05.09.1999
Anwendungshinweis DN-30 Programmable Electronic Circuit Breaker 05.09.1999
Anwendungshinweis DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers 05.09.1999
Anwendungshinweis DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 05.09.1999

Design und Entwicklung

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Simulationsmodell

UC1843A-SP Unencrypted PSpice Transient Model

SLUM660.ZIP (3 KB) - PSpice-Modell
Unterstützte Produkte und Hardware
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
LCCC (FK) 20 Ultra Librarian
CDIP (JG) 8 Ultra Librarian
DIESALE (KGD) Ultra Librarian

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