UC1845A-SP

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

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Hoja de datos

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

UC1845A-SP

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Hoja de datos

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Detalles del producto

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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Documentación técnica

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Documentación principal	Tipo	Título	Opciones de formato	Fecha
*	Hoja de datos	UC1845A-SP QML class V, radiation hardened current-mode PWM controller datasheet (Rev. A)	PDF \| HTML	21/02/2019
*	Informe de radiación y confiabilidad	UC1845A-SP Neutron Displacement Damage Characterization Test Report		5/05/2021
*	Informe de radiación y confiabilidad	UC1845A-SP TID Radiation Test Report		19/05/2015
*	SMD	UC1845A-SP SMD 5962-86704		8/07/2016
	Guía de selección	TI Space Products (Rev. L)		27/03/2026
	Nota sobre la aplicación	Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form (Rev. A)	PDF \| HTML	5/11/2025
	Application brief	DLA Approved Optimizations for QML Products (Rev. C)	PDF \| HTML	17/06/2025
	Nota sobre la aplicación	Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. B)	PDF \| HTML	10/06/2025
	Más documentación	TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. B)		20/02/2025
	Nota sobre la aplicación	QML flow, its importance, and obtaining lot information (Rev. C)		30/08/2023
	Nota sobre la aplicación	Single-Event Effects Confidence Interval Calculations (Rev. A)	PDF \| HTML	19/10/2022
	Application brief	Controlling Input Power for Present and Next-Generation Power Controllers	PDF \| HTML	14/12/2020
	Nota sobre la aplicación	DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer		21/08/2020
	Libro electrónico	Radiation Handbook for Electronics (Rev. A)		21/05/2019
	Artículo técnico	Power Tips: Calculate an R-C snubber in seven steps	PDF \| HTML	5/05/2016

Diseño y desarrollo

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