UC1843A-SP

現行

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

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產品規格表

document-pdfAcrobat UC1843A-SP QML class V, radiation hardened current-mode PWM controller datasheet (Rev. A) (英文) PDF | HTML

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)

64.032 mm² (— mm × — mm)

LCCC (FK)

79.0321 mm² (— mm × — mm)

CFP (HKU)

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 R_O 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 R_O 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 V_CC 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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重要文件	類型	標題	格式選項	日期
*	資料表	UC1843A-SP QML class V, radiation hardened current-mode PWM controller datasheet (Rev. A)	PDF \| HTML	2019/2/21
*	輻射及可靠性報告	UC1843A-SP NDD (Neutron Displacement Damage) Characterization		2021/8/5
*	輻射及可靠性報告	UC1843A-SP Radiation Test Report		2015/5/11
*	SMD	UC1843A-SP SMD 5962-86704		2016/7/8
	選擇指南	TI Space Products (Rev. L)		2026/3/27
	應用說明	Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form (Rev. A)	PDF \| HTML	2025/11/5
	Application brief	DLA Approved Optimizations for QML Products (Rev. C)	PDF \| HTML	2025/6/17
	應用說明	Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. B)	PDF \| HTML	2025/6/10
	更多文件說明	TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. B)		2025/2/20
	應用說明	QML flow, its importance, and obtaining lot information (Rev. C)		2023/8/30
	應用說明	Single-Event Effects Confidence Interval Calculations (Rev. A)	PDF \| HTML	2022/10/19
	Application brief	Controlling Input Power for Present and Next-Generation Power Controllers	PDF \| HTML	2020/12/14
	應用說明	DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer		2020/8/21
	電子書	Radiation Handbook for Electronics (Rev. A)		2019/5/21
	技術文章	Power Tips: Calculate an R-C snubber in seven steps	PDF \| HTML	2016/5/5
	應用說明	UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers		2002/2/7
	應用說明	DN-65 Considerations in Powering BiCMOS ICs		1999/9/5
	應用說明	DN-27 UC1842/UC1842A Family - Summary of Functional Differences		1999/9/5
	應用說明	DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit		1999/9/5
	應用說明	DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty		1999/9/5
	應用說明	DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection		1999/9/5
	應用說明	U-111, Practical Considerations in Current Mode Power Supplies		1999/9/5
	應用說明	U-100A UC3842/3/4/5 Provides Low-Cost Current-Mode Control		1999/9/5
	應用說明	Modeling, Analysis and Compensation of the Current-Mode Converter		1999/9/5
	應用說明	DN-30 Programmable Electronic Circuit Breaker		1999/9/5
	應用說明	DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers		1999/9/5
	應用說明	DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode		1999/9/5