UC1845A-SP

現行

Radiation-tolerant, QML-V, 30V input, 1A single-output 500kHz PWM controller, 50% duty cycle

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產品規格表

document-pdfAcrobat UC1845A-SP QML class V, radiation hardened current-mode PWM controller datasheet (Rev. A) (英文) PDF | HTML

UC1845A-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, Fixed frequency, Multi-topology

Duty cycle (max) (%)

50

Topology

Boost, Flyback, Forward

Control mode

Current

Features

Error amplifier, Fixed frequency, Multi-topology

Duty cycle (max) (%)

50

CDIP (JG)

8

64.032 mm² (— mm × — mm)

LCCC (FK)

20

79.0321 mm² (— mm × — mm)

CFP (HKU)

10

45.4896 mm² (— mm × — mm)

QML Class V (QMLV) Qualified, SMD 5962-86704
5962P8670411Vxx: ⁽¹⁾
- 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 ⁽²⁾ but Remains Within the Pre-Radiation Electrical Limits at 30-krad Total Dose Level, as Allowed by MIL-STD-883, TM1019
Optimized for DC-to-DC Converter Applications
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
Qualified Over the Military Temperature Range (–55°C to 125°C)

⁽¹⁾Improved TID radiation performance only applies to RHA device type 11.

⁽²⁾The affected parameter Reference Output Voltage, VREF Radiation Drift Curve (see VREF Radiation Drift Curve).

QML Class V (QMLV) Qualified, SMD 5962-86704
5962P8670411Vxx: ⁽¹⁾
- 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 ⁽²⁾ but Remains Within the Pre-Radiation Electrical Limits at 30-krad Total Dose Level, as Allowed by MIL-STD-883, TM1019
Optimized for DC-to-DC Converter Applications
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
Qualified Over the Military Temperature Range (–55°C to 125°C)

⁽¹⁾Improved TID radiation performance only applies to RHA device type 11.

⁽²⁾The affected parameter Reference Output Voltage, VREF Radiation Drift Curve (see VREF Radiation Drift Curve).

The UC1845A-SP control IC is a radiation hardened pin-for-pin compatible version of the UC184x family. It is primarily suited for Satellites and other harsh environment applications. 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.

The UC1845A-SP control IC is a radiation hardened pin-for-pin compatible version of the UC184x family. It is primarily suited for Satellites and other harsh environment applications. 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	UC1845A-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	UC1845A-SP Neutron Displacement Damage Characterization Test Report		2021/5/5
*	輻射及可靠性報告	UC1845A-SP TID Radiation Test Report		2015/5/19
*	SMD	UC1845A-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