UC1843AJ Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock

Name: UC1843AJ
Brand: Texas Instruments
SKU: UC1843AJ
Availability: InStock

The UC1843AJ is a current-mode PWM controller from Texas Instruments designed for off-line and DC-DC switching power supply applications, featuring an 8.2–25 V input voltage range in a ceramic DIP-8 package. It integrates a precision reference, oscillator, and cycle-by-cycle current limiting for robust power conversion. Available from stock with worldwide shipping.

ACTIVEIntegrated CircuitVerified May 2026

Package / Visual Reference

UC1843AJCeramic Dual-In-Line Packages

Quick Facts

Manufacturer: Texas Instruments
Package: Ceramic Dual-In-Line Packages
Pin Count: 8
Lifecycle: ACTIVE
Datasheet: UC1843AJ Datasheet PDF
Category: Integrated Circuit
Temp Range: -55.0°C to 125.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of UC1843AJ?

Current-mode control with cycle-by-cycle current limiting for inherent short-circuit protection and simplified loop compensation
Wide input voltage range of 8.2 V to 25 V with 15 V nominal operation, ideal for offline flyback and forward converter designs
Military-grade ceramic DIP-8 (CDIP) packaging offering enhanced reliability and vibration resistance for harsh-environment applications

What is UC1843AJ used for?

The UC1843AJ is widely used in off-line flyback and forward converter power supplies operating from rectified mains voltage. Its current-mode control architecture makes it suitable for DC-DC converters requiring tight output voltage regulation and fast transient response. The ceramic DIP package makes it a preferred choice in military, aerospace, and high-reliability industrial power systems.

What are the specifications of UC1843AJ?

Pbfree Code	Yes
YTEOL	15
Analog IC - Other Type	SWITCHING CONTROLLER
Control Mode	CURRENT-MODE
Control Technique	PULSE WIDTH MODULATION
Input Voltage-Max	25V
Input Voltage-Min	8.2V
Input Voltage-Nom	15V
JESD-30 Code	R-GDIP-T8
JESD-609 Code	e0
Number of Functions	1
Output Current-Max	1A
Output Voltage-Max	5.05V
Output Voltage-Min	4.95V
Output Voltage-Nom	5V
Package Body Material	CERAMIC, GLASS-SEALED
Package Equivalence Code	DIP8,.3
Package Shape	RECTANGULAR
Package Style	IN-LINE
Qualification Status	Not Qualified
Supply Current-Max (Isup)	25mA
Supply Voltage-Max (Vsup)	25V
Supply Voltage-Min (Vsup)	12V
Supply Voltage-Nom (Vsup)	11V
Surface Mount	NO
Switcher Configuration	BUCK-BOOST
Switching Frequency-Max	500kHz
Technology	BIPOLAR
Temperature Grade	MILITARY
Terminal Finish	Tin/Lead (Sn/Pb)
Terminal Form	THROUGH-HOLE
Terminal Pitch	2.54mm
Terminal Position	DUAL
Package	Ceramic Dual-In-Line Packages

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)
ECCN	EAR99
HTS Code	8542.39.00.90

Where can I find the UC1843AJ datasheet?

UC1843AJ Datasheet Download

Official datasheet from Texas Instruments

What are equivalent replacements for UC1843AJ?

Compatible alternatives and drop-in replacements for UC1843AJ:

UC1843J883BTexas Instruments

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BICMOS, CDIP8

View Part →

5962-8670402PAMicrochip Technology Inc

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP8

View Part →

UC1843AJ883BTexas Instruments

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP8

View Part →

Compare all alternatives & request quotes →

Frequently Asked Questions

What is the input voltage range of the UC1843AJ?

The UC1843AJ operates with an input voltage range of 8.2 V to 25 V, with a nominal operating voltage of 15 V. This range suits it for both off-line applications powered from rectified mains and DC-DC converter designs in regulated bus systems.

What control mode does the UC1843AJ use?

The UC1843AJ uses current-mode pulse width modulation (PWM) control, which provides cycle-by-cycle current limiting, simplified voltage loop compensation, and inherent protection against core saturation in transformer-based converter topologies.

What package does the UC1843AJ come in?

The UC1843AJ is housed in a ceramic dual-in-line (CDIP) 8-pin package (JESD-30 code R-GDIP-T8). The ceramic construction offers superior moisture resistance and mechanical durability compared to plastic DIP packages, making it suitable for military and high-reliability applications.

What types of power supply topologies can the UC1843AJ support?

The UC1843AJ is compatible with flyback, forward, and boost converter topologies. Its current-mode control and maximum duty cycle limiting make it especially effective in off-line isolated power supplies and DC-DC converters targeting 25 W to 200 W output power levels.

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About Texas Instruments

Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.

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UC1843AJ Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock

What are the key features of UC1843AJ?

What is UC1843AJ used for?

What are the specifications of UC1843AJ?

Compliance & Regulatory

Where can I find the UC1843AJ datasheet?

What are equivalent replacements for UC1843AJ?

Frequently Asked Questions

What is the input voltage range of the UC1843AJ?

What control mode does the UC1843AJ use?

What package does the UC1843AJ come in?

What types of power supply topologies can the UC1843AJ support?

Related Guides

CSD87313DMS Synchronous Buck Power Stage Design Guide

STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection

C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC

STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security

Why Buy from FindMyChip

About Texas Instruments

More from Texas Instruments

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