Startseite Energiemanagement AC/DC & DC/DC controllers (external FET)
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Energiemanagement
AC/DC & DC/DC controllers (external FET)

UC1843-SP

AKTIV

Strahlungsbeständiger QMLV-1-A-Einzelausgangs-PWM-Controller, mit 30 V Eingang, 500 kHz, 100 % Einsc

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Datenblatt

UC1843-SP

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Vin (max) (V) 30 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward Rating Space Duty cycle (max) (%) 100
Vin (max) (V) 30 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward Rating Space Duty cycle (max) (%) 100
CDIP (JG) 8 64.032 mm² 9.6 x 6.67 DIESALE (KGD) — See data sheet LCCC (FK) 20 79.0321 mm² 8.89 x 8.89
  • 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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Alle anzeigen 25
Typ Titel Datum
* Data sheet QML Class V, Current-Mode PWM Controllers. datasheet 25 Mär 2010
* SMD UC1843-SP SMD 5962-86704 08 Jul 2016
* Radiation & reliability report UC1843-SP Radiation Test Report 25 Nov 2014
More literature TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. A) 31 Aug 2023
Application note QML flow, its importance, and obtaining lot information (Rev. C) 30 Aug 2023
Application note Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. A) PDF | HTML 17 Nov 2022
Application note Single-Event Effects Confidence Interval Calculations (Rev. A) PDF | HTML 19 Okt 2022
Selection guide TI Space Products (Rev. I) 03 Mär 2022
Application brief Controlling Input Power for Present and Next-Generation Power Controllers PDF | HTML 14 Dez 2020
Application note DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer 21 Aug 2020
Application note Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form PDF | HTML 18 Mai 2020
E-book Radiation Handbook for Electronics (Rev. A) 21 Mai 2019
Technical article Power Tips: Calculate an R-C snubber in seven steps PDF | HTML 05 Mai 2016
Application note UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers 07 Feb 2002
Application note DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit 05 Sep 1999
Application note DN-27 UC1842/UC1842A Family - Summary of Functional Differences 05 Sep 1999
Application note DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection 05 Sep 1999
Application note DN-30 Programmable Electronic Circuit Breaker 05 Sep 1999
Application note DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty 05 Sep 1999
Application note DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 05 Sep 1999
Application note DN-65 Considerations in Powering BiCMOS ICs 05 Sep 1999
Application note DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers 05 Sep 1999
Application note Modeling, Analysis and Compensation of the Current-Mode Converter 05 Sep 1999
Application note U-100A UC3842/3/4/5 Provides Low-Cost Current-Mode Control 05 Sep 1999
Application note U-111, Practical Considerations in Current Mode Power Supplies 05 Sep 1999

Design und Entwicklung

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Simulationsmodell

UC1843A-SP Unencrypted PSpice Transient Model

SLUM660.ZIP (3 KB) - PSpice Model
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Gehäuse Pins Herunterladen
CDIP (JG) 8 Optionen anzeigen
DIESALE (KGD) —
LCCC (FK) 20 Optionen anzeigen
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Bestellen & Qualität

Beinhaltete Information:
  • RoHS
  • REACH
  • Bausteinkennzeichnung
  • Blei-Finish/Ball-Material
  • MSL-Rating / Spitzenrückfluss
  • MTBF-/FIT-Schätzungen
  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
Beinhaltete Information:
  • Werksstandort
  • Montagestandort

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