Inicio Gestión de la energía Controladores CA/CC y CC/CC (FET externo)
Inicio
Gestión de la energía
Controladores CA/CC y CC/CC (FET externo)

UC1843A-SP

ACTIVO

Controlador QMLV con tolerancia a la radiación, entrada mejorada de 30 V, controlador PWM de 1 A

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UC1843A-SP

ACTIVO
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Detalles del producto

Vin (max) (V) 25 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward Rating Space Features Error amplifier, Multi-topology Duty cycle (max) (%) 100
Vin (max) (V) 25 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward Rating Space Features Error amplifier, Multi-topology Duty cycle (max) (%) 100
CDIP (JG) 8 64.032 mm² 9.6 x 6.67 CFP (HKU) 10 45.4896 mm² 7.02 x 6.48 LCCC (FK) 20 79.0321 mm² 8.89 x 8.89
  • 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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* Data sheet UC1843A-SP QML class V, radiation hardened current-mode PWM controller datasheet (Rev. A) PDF | HTML 21 feb 2019
* Radiation & reliability report UC1843A-SP NDD (Neutron Displacement Damage) Characterization 05 ago 2021
* SMD UC1843A-SP SMD 5962-86704 08 jul 2016
* Radiation & reliability report UC1843A-SP Radiation Test Report 11 may 2015
Application brief DLA Approved Optimizations for QML Products (Rev. B) PDF | HTML 23 oct 2024
Selection guide TI Space Products (Rev. J) 12 feb 2024
More literature TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. A) 31 ago 2023
Application note QML flow, its importance, and obtaining lot information (Rev. C) 30 ago 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 oct 2022
Application brief Controlling Input Power for Present and Next-Generation Power Controllers PDF | HTML 14 dic 2020
Application note DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer 21 ago 2020
Application note Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form PDF | HTML 18 may 2020
E-book Radiation Handbook for Electronics (Rev. A) 21 may 2019
Technical article Power Tips: Calculate an R-C snubber in seven steps PDF | HTML 05 may 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

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) - TINA-TI Reference Design
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Modelo de simulación

UC1843A-SP TINA-TI Transient Spice Model

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

UC1843A-SP Unencrypted PSpice Transient Model

SLUM660.ZIP (3 KB) - PSpice Model
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Diseños de referencia

TIDA-070002 — Diseño de referencia de protección contra sobrecorriente DC/DC de retorno aislada de grado espacial,

Spacecraft bus voltages vary from the well-established 28-V to more than the 100-V typically used in highpower commercial communications satellites, this reference design shows an example for a space-grade 50-W isolated intermediary bus converter, while implementing over-current protection (OCP) (...)
Design guide: PDF
Esquema: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
CDIP (JG) 8 Ultra Librarian
CFP (HKU) 10 Ultra Librarian
LCCC (FK) 20 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

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