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AC/DC 控制器

UC1843A-SP

現行

100% 工作週期、抗輻射 QMLV、強化型 30-V 輸入、1-A 500-kHz PWM 控制器

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產品規格表

UC1843A-SP

現行
產品規格表 立即訂購

產品詳細資料

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 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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技術文件

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重要文件 類型 標題 格式選項 日期
* Data sheet UC1843A-SP QML class V, radiation hardened current-mode PWM controller datasheet (Rev. A) PDF | HTML 2019年 2月 21日
* Radiation & reliability report UC1843A-SP NDD (Neutron Displacement Damage) Characterization 2021年 8月 5日
* SMD UC1843A-SP SMD 5962-86704 2016年 7月 8日
* Radiation & reliability report UC1843A-SP Radiation Test Report 2015年 5月 11日
Application note Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form (Rev. A) PDF | HTML 2025年 11月 5日
Application brief DLA Approved Optimizations for QML Products (Rev. C) PDF | HTML 2025年 6月 17日
Application note Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. B) PDF | HTML 2025年 6月 10日
Selection guide TI Space Products (Rev. K) 2025年 4月 4日
More literature TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. B) 2025年 2月 20日
Application note QML flow, its importance, and obtaining lot information (Rev. C) 2023年 8月 30日
Application note Single-Event Effects Confidence Interval Calculations (Rev. A) PDF | HTML 2022年 10月 19日
Application brief Controlling Input Power for Present and Next-Generation Power Controllers PDF | HTML 2020年 12月 14日
Application note DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer 2020年 8月 21日
E-book Radiation Handbook for Electronics (Rev. A) 2019年 5月 21日
Technical article Power Tips: Calculate an R-C snubber in seven steps PDF | HTML 2016年 5月 5日
Application note UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers 2002年 2月 7日
Application note DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit 1999年 9月 5日
Application note DN-27 UC1842/UC1842A Family - Summary of Functional Differences 1999年 9月 5日
Application note DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection 1999年 9月 5日
Application note DN-30 Programmable Electronic Circuit Breaker 1999年 9月 5日
Application note DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty 1999年 9月 5日
Application note DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 1999年 9月 5日
Application note DN-65 Considerations in Powering BiCMOS ICs 1999年 9月 5日
Application note DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers 1999年 9月 5日
Application note Modeling, Analysis and Compensation of the Current-Mode Converter 1999年 9月 5日
Application note U-100A UC3842/3/4/5 Provides Low-Cost Current-Mode Control 1999年 9月 5日
Application note U-111, Practical Considerations in Current Mode Power Supplies 1999年 9月 5日

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如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

模擬型號

UC1843A-SP TINA-TI Transient Reference Design

SLUM674.TSC (6331 KB) - TINA-TI Reference Design
下載
模擬型號

UC1843A-SP TINA-TI Transient Spice Model

SLUM675.ZIP (17 KB) - TINA-TI Spice Model
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模擬型號

UC1843A-SP Unencrypted PSpice Transient Model

SLUM660.ZIP (3 KB) - PSpice Model
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
CDIP (JG) 8 Ultra Librarian
CFP (HKU) 10 Ultra Librarian
LCCC (FK) 20 Ultra Librarian
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