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

UC1842A-SP

現行

具 100% 工作週期的航太級 QMLV、增強的 30-V 輸入、1-A 單輸出 500-kHz PWM 控制器

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產品規格表

UC1842A-SP

現行
產品規格表 立即訂購

產品詳細資料

Vin (max) (V) 25 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward Rating Space Duty cycle (max) (%) 100
Vin (max) (V) 25 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
  • QML Class V (QMLV) Qualified, SMD 5962-86704
  • Rad-Tolerant: 30-krad(Si) TID (1) (2)
  • 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

(1)The LDR improved die is only available in the UC1843A-SP (orderable as 5962-8670409VPA). Contact factory to request an LDR-improved version of the UC1842A-SP or UC1844A-SP.

(2)Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad(Si)/s. Radiation lot acceptance testing is available - contact factory for details.
  • QML Class V (QMLV) Qualified, SMD 5962-86704
  • Rad-Tolerant: 30-krad(Si) TID (1) (2)
  • 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

(1)The LDR improved die is only available in the UC1843A-SP (orderable as 5962-8670409VPA). Contact factory to request an LDR-improved version of the UC1842A-SP or UC1844A-SP.

(2)Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad(Si)/s. Radiation lot acceptance testing is available - contact factory for details.

The UC184xA-SP family of control ICs is a pin-for-pin compatible improved 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 UC184xA-SP family of control ICs is a pin-for-pin compatible improved 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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UC1843B-SP 現行 100% 工作週期、抗輻射 QMLV、30V 輸入、1A 單輸出 500kHz PWM 控制器 This product is part of the UC184x-SP family with improved 100krad(Si) TID performance, SEE immune to 75MeV.cm2/mg with NDSEE and NDD test results

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類型 標題 日期
* Data sheet UC184xA-SP QML class V, current-mode PWM controller datasheet (Rev. E) PDF | HTML 2019年 2月 22日
* SMD UC1842A-SP SMD 5962-86704 2016年 7月 8日
More literature TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. A) 2023年 8月 31日
Application note QML flow, its importance, and obtaining lot information (Rev. C) 2023年 8月 30日
Application note Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. A) PDF | HTML 2022年 11月 17日
Application note Single-Event Effects Confidence Interval Calculations (Rev. A) PDF | HTML 2022年 10月 19日
Selection guide TI Space Products (Rev. I) 2022年 3月 3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
Application note Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form PDF | HTML 2020年 5月 18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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