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UC1843A-SP

ACTIVO

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

Detalles del producto

Topology Boost, Flyback, Forward Control mode Current Features Error amplifier, Multi-topology Duty cycle (max) (%) 100
Topology Boost, Flyback, Forward Control mode Current Features Error amplifier, Multi-topology Duty cycle (max) (%) 100
CDIP (JG) 8 64.032 mm² (— mm × — mm) LCCC (FK) 20 79.0321 mm² (— mm × — mm) CFP (HKU) 10 45.4896 mm² (— mm × — mm)
  • QML Class V (QMLV) Qualified, SMD 5962-86704
  • 5962P8670409Vxx:
    • Radiation Hardness Assurance (RHA) up to
      30-krad(Si) Total Ionizing Dose (TID)
    • Passes Functional and Specified Post-Radiation Parametric Limits at 45 krad at LDR (10 mrad(Si)/s) per 1.5× Over Test as Defined in MIL-STD-883 Test Method 1019.9 Paragraph 3.13.3.b
    • Exhibits Low-Dose Rate Sensitivity but Remains Within the Pre-Radiation Electrical Limits at 30-krad Total Dose Level, as Allowed by MIL-STD-883, TM1019
  • Optimized for Offline and DC-to-DC Converters
  • Low Start-Up Current (< 0.5 mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feed Forward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Undervoltage Lockout (UVLO) With Hysteresis
  • Double-Pulse Suppression
  • High-Current Totem-Pole Output
  • Internally-Trimmed Bandgap Reference
  • 500-kHz Operation
  • Low RO Error Amplifier
  • QML Class V (QMLV) Qualified, SMD 5962-86704
  • 5962P8670409Vxx:
    • Radiation Hardness Assurance (RHA) up to
      30-krad(Si) Total Ionizing Dose (TID)
    • Passes Functional and Specified Post-Radiation Parametric Limits at 45 krad at LDR (10 mrad(Si)/s) per 1.5× Over Test as Defined in MIL-STD-883 Test Method 1019.9 Paragraph 3.13.3.b
    • Exhibits Low-Dose Rate Sensitivity but Remains Within the Pre-Radiation Electrical Limits at 30-krad Total Dose Level, as Allowed by MIL-STD-883, TM1019
  • Optimized for Offline and DC-to-DC Converters
  • Low Start-Up Current (< 0.5 mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feed Forward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Undervoltage Lockout (UVLO) With Hysteresis
  • Double-Pulse Suppression
  • High-Current Totem-Pole Output
  • Internally-Trimmed Bandgap Reference
  • 500-kHz Operation
  • Low RO Error Amplifier

The UC1843A-SP control IC is a radiation hardened pin-for-pin compatible version of the UC184x family. Providing the necessary characteristics to control current-mode switched-mode power supplies, this device has improved features. Start-up current is specified to be less than 0.5 mA and oscillator discharge is trimmed to 8.3 mA. During UVLO, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.

The Device Comparison Table shows the difference between members of this family. Reference the individual product data sheets for ordering the radiation-improved version if available.

The UC1843A-SP control IC is a radiation hardened pin-for-pin compatible version of the UC184x family. Providing the necessary characteristics to control current-mode switched-mode power supplies, this device has improved features. Start-up current is specified to be less than 0.5 mA and oscillator discharge is trimmed to 8.3 mA. During UVLO, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.

The Device Comparison Table shows the difference between members of this family. Reference the individual product data sheets for ordering the radiation-improved version if available.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos UC1843A-SP QML class V, radiation hardened current-mode PWM controller datasheet (Rev. A) PDF | HTML 21/02/2019
* Informe de radiación y confiabilidad UC1843A-SP NDD (Neutron Displacement Damage) Characterization 5/08/2021
* Informe de radiación y confiabilidad UC1843A-SP Radiation Test Report 11/05/2015
* SMD UC1843A-SP SMD 5962-86704 8/07/2016
Guía de selección TI Space Products (Rev. L) 27/03/2026
Nota sobre la aplicación Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form (Rev. A) PDF | HTML 5/11/2025
Application brief DLA Approved Optimizations for QML Products (Rev. C) PDF | HTML 17/06/2025
Nota sobre la aplicación Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. B) PDF | HTML 10/06/2025
Más documentación TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. B) 20/02/2025
Nota sobre la aplicación QML flow, its importance, and obtaining lot information (Rev. C) 30/08/2023
Nota sobre la aplicación 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
Nota sobre la aplicación DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer 21/08/2020
Libro electrónico Radiation Handbook for Electronics (Rev. A) 21/05/2019
Artículo técnico Power Tips: Calculate an R-C snubber in seven steps PDF | HTML 5/05/2016
Nota sobre la aplicación UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers 7/02/2002
Nota sobre la aplicación DN-65 Considerations in Powering BiCMOS ICs 5/09/1999
Nota sobre la aplicación DN-27 UC1842/UC1842A Family - Summary of Functional Differences 5/09/1999
Nota sobre la aplicación DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit 5/09/1999
Nota sobre la aplicación DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty 5/09/1999
Nota sobre la aplicación DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection 5/09/1999
Nota sobre la aplicación U-111, Practical Considerations in Current Mode Power Supplies 5/09/1999
Nota sobre la aplicación U-100A UC3842/3/4/5 Provides Low-Cost Current-Mode Control 5/09/1999
Nota sobre la aplicación Modeling, Analysis and Compensation of the Current-Mode Converter 5/09/1999
Nota sobre la aplicación DN-30 Programmable Electronic Circuit Breaker 5/09/1999
Nota sobre la aplicación DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers 5/09/1999
Nota sobre la aplicación DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 5/09/1999

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Modelo de simulación

UC1843A-SP TINA-TI Transient Reference Design

SLUM674.TSC (6331 KB) - Diseño de referencia TINA-TI
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Modelo de simulación

UC1843A-SP TINA-TI Transient Spice Model

SLUM675.ZIP (17 KB) - Modelo TINA-TI Spice
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Modelo de simulación

UC1843A-SP Unencrypted PSpice Transient Model

SLUM660.ZIP (3 KB) - Modelo PSpice
Productos y hardware compatibles
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
CDIP (JG) 8 Ultra Librarian
LCCC (FK) 20 Ultra Librarian
CFP (HKU) 10 Ultra Librarian

Pedidos y calidad

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