UC2841NG4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock

Name: UC2841NG4
Brand: Texas Instruments
SKU: UC2841NG4
Availability: InStock

The UC2841NG4 is a current-mode PWM switching controller from Texas Instruments operating from 8 V to 30 V input and switching up to 500 kHz. It delivers up to 1 A gate drive current and supports both current-mode and voltage-mode control in an 18-pin PDIP package. Ideal for flyback, forward converter, and boost regulator designs in industrial and telecom power supplies.

OBSOLETEIntegrated CircuitVerified Jun 2026

Package / Visual Reference

UC2841NG4Dual-In-Line Packages

Quick Facts

Manufacturer: Texas Instruments
Package: Dual-In-Line Packages
Pin Count: 18
Lifecycle: OBSOLETE
Datasheet: UC2841NG4 Datasheet PDF
Category: Integrated Circuit
Temp Range: -25.0°C to 85.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of UC2841NG4?

Current-mode PWM control with optional voltage-mode operation for design flexibility
500 kHz maximum switching frequency enabling compact magnetics and fast transient response
1 A peak gate drive output supporting a wide range of power MOSFETs and IGBTs
8 V to 30 V input operating range covering diverse industrial and telecom supply rails

What is UC2841NG4 used for?

The UC2841NG4 is commonly used in isolated flyback and forward DC-DC converter designs for industrial power supplies, telecommunications equipment, and distributed power architectures. Its 500 kHz switching capability allows use of smaller transformers and output capacitors, reducing overall converter size and cost. The current-mode control loop simplifies compensation design and provides inherent cycle-by-cycle overcurrent limiting for enhanced power supply protection.

What are the specifications of UC2841NG4?

Pbfree Code	Yes
YTEOL	0
Additional Feature	VOLTAGE MODE OPERATION IS ALSO POSSIBLE
Analog IC - Other Type	SWITCHING CONTROLLER
Control Mode	CURRENT-MODE
Control Technique	PULSE WIDTH MODULATION
Input Voltage-Max	30V
Input Voltage-Min	8V
Input Voltage-Nom	20V
JESD-30 Code	R-PDIP-T18
JESD-609 Code	e4
Number of Functions	1
Output Current-Max	1A
Package Body Material	PLASTIC/EPOXY
Package Equivalence Code	DIP18,.3
Package Shape	RECTANGULAR
Package Style	IN-LINE
Qualification Status	Not Qualified
Screening Level	TS 16949
Supply Current-Max (Isup)	14mA
Surface Mount	NO
Switcher Configuration	SINGLE
Switching Frequency-Max	500kHz
Technology	BIPOLAR
Temperature Grade	OTHER
Terminal Finish	NICKEL PALLADIUM GOLD
Terminal Form	THROUGH-HOLE
Terminal Pitch	2.54mm
Terminal Position	DUAL
Package	Dual-In-Line Packages

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)
ECCN	EAR99
HTS Code	8542.39.00.60

Where can I find the UC2841NG4 datasheet?

UC2841NG4 Datasheet Download

Official datasheet from Texas Instruments

What are equivalent replacements for UC2841NG4?

No known alternates. Submit an RFQ and our team can suggest alternatives.

Frequently Asked Questions

What switching frequency does the UC2841NG4 support and how does that affect power supply magnetics sizing?

The UC2841NG4 supports switching frequencies up to 500 kHz, which allows transformer and inductor core volumes to be reduced by roughly 4x to 10x compared to designs running at 50 kHz to 100 kHz. Higher frequency reduces the required inductance, enabling smaller, lighter magnetics that lower BOM cost and PCB footprint in compact industrial and telecom power modules.

How does current-mode control in the UC2841NG4 simplify feedback loop compensation versus voltage-mode controllers?

Current-mode control in the UC2841NG4 makes the power stage behave as a current source, reducing the effective order of the control loop from second to first order. This simplifies the error amplifier compensation to a single-pole design and eliminates the right-half-plane zero problem in boost topologies, shortening design time and improving transient response at output loads varying from 100 mA to 1 A or more.

For a 48 V to 12 V isolated flyback converter design, how well does the UC2841NG4's input voltage range fit?

The UC2841NG4 operates from an 8 V to 30 V VCC supply, so the controller itself is powered from a bias winding or an auxiliary 12 V to 24 V rail rather than directly from the 48 V bus. This is standard practice in isolated flyback designs where a low-voltage bias supply is generated from a separate winding, and the part comfortably accepts a 15 V bias rail with a nominal 20 V center rating and a 30 V absolute maximum.

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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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UC2841NG4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock

What are the key features of UC2841NG4?

What is UC2841NG4 used for?

What are the specifications of UC2841NG4?

Compliance & Regulatory

Where can I find the UC2841NG4 datasheet?

What are equivalent replacements for UC2841NG4?

Frequently Asked Questions

What switching frequency does the UC2841NG4 support and how does that affect power supply magnetics sizing?

How does current-mode control in the UC2841NG4 simplify feedback loop compensation versus voltage-mode controllers?

For a 48 V to 12 V isolated flyback converter design, how well does the UC2841NG4's input voltage range fit?

Related Guides

STM32H725IGT3 Selection Guide: Memory, Package, Temperature, and Supply

STM32H725IGT3 High-Performance MCU Design Guide

150141VS73100 Violet SMD LED Selection Guide: Color, Drive, and Sourcing

STEF05SGR 5 V eFuse Protection Design Guide

Why Buy from FindMyChip

About Texas Instruments

More from Texas Instruments

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