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UC1843-SP

ACTIVO

Controlador PWM QMLV con tolerancia a la radiación, entrada de 30 V, 1 A, salida única de 500 kHz, c

Detalles del producto

Rating Space Topology Boost, Flyback, Forward Vin (max) (V) 25 Vin (min) (V) 12 Control mode Current Features Error amplifier, Fixed frequency, Multi-topology Operating temperature range (°C) -55 to 125 Duty cycle (max) (%) 100
Rating Space Topology Boost, Flyback, Forward Vin (max) (V) 25 Vin (min) (V) 12 Control mode Current Features Error amplifier, Fixed frequency, Multi-topology Operating temperature range (°C) -55 to 125 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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Documentación técnica

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Tipo Título Fecha
* Data sheet QML Class V, Current-Mode PWM Controller datasheet 25 mar 2010
* SMD UC1843-SP SMD 5962-86704 08 jul 2016
* Radiation & reliability report UC1843-SP Radiation Test Report 25 nov 2014
Application note Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form (Rev. A) PDF | HTML 05 nov 2025
Application brief DLA Approved Optimizations for QML Products (Rev. C) PDF | HTML 17 jun 2025
Application note Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. B) PDF | HTML 10 jun 2025
Selection guide TI Space Products (Rev. K) 04 abr 2025
More literature TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. B) 20 feb 2025
Application note QML flow, its importance, and obtaining lot information (Rev. C) 30 ago 2023
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
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 Unencrypted PSpice Transient Model

SLUM660.ZIP (3 KB) - PSpice Model
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
CDIP (JG) 8 Ultra Librarian
DIESALE (KGD)
LCCC (FK) 20 Ultra Librarian

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

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