UC3879N Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock

Name: UC3879N
Brand: Texas Instruments
SKU: UC3879N
Availability: InStock

UC3879N is a phase-shift resonant PWM controller IC from Texas Instruments supporting current/voltage-mode control, 11–20V input range, 20-pin DIP package. From $5.325, in stock with worldwide shipping.

ACTIVEIntegrated CircuitVerified Apr 2026

Package / Visual Reference

UC3879NDual-In-Line Packages

Quick Facts

Manufacturer: Texas Instruments
Package: Dual-In-Line Packages
Pin Count: 20
Lifecycle: ACTIVE
Datasheet: UC3879N Datasheet PDF
Category: Integrated Circuit
Price: From $5.3250(MOQ 1)
Temp Range: ?°C to 70.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of UC3879N?

Phase-shift resonant PWM control with both current-mode and voltage-mode support
Wide input voltage range of 11V to 20V (nominal 12V) for flexible power supply designs
Dual control technique: pulse width modulation combined with resonant control for high efficiency
20-pin DIP package (R-PDIP-T20) for easy through-hole PCB integration
Peak current (IPK) control mode enables precise cycle-by-cycle overcurrent limiting

What is UC3879N used for?

The UC3879N is designed for high-efficiency resonant power conversion systems such as LLC and phase-shift full-bridge DC-DC converters. It is widely used in telecom power supplies, industrial SMPS, and server power systems where soft-switching techniques are required to minimize switching losses. Its combined PWM and resonant control capability also makes it suitable for UPS systems and high-density power modules.

What are the specifications of UC3879N?

Pbfree Code	Yes
YTEOL	15
Additional Feature	ALSO HAS CONTROL MODE OF IPK, ALSO HAS CONTROL TECHNIQUE OF RESONANT
Analog IC - Other Type	SWITCHING CONTROLLER
Control Mode	CURRENT/VOLTAGE-MODE
Control Technique	PULSE WIDTH MODULATION
Input Voltage-Max	20V
Input Voltage-Min	11V
Input Voltage-Nom	12V
JESD-30 Code	R-PDIP-T20
JESD-609 Code	e4
Number of Functions	1
Output Current-Max	0.1A
Output Voltage-Max	5.08V
Output Voltage-Min	4.92V
Output Voltage-Nom	5V
Package Body Material	PLASTIC/EPOXY
Package Equivalence Code	DIP20,.3
Package Shape	RECTANGULAR
Package Style	IN-LINE
Qualification Status	Not Qualified
Supply Current-Max (Isup)	35mA
Surface Mount	NO
Switcher Configuration	BUCK-BOOST
Switching Frequency-Max	300kHz
Technology	BIPOLAR
Temperature Grade	COMMERCIAL
Terminal Finish	Nickel/Palladium/Gold (Ni/Pd/Au)
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	8542.39.00.90
Country of Origin	Malaysia

Where can I find the UC3879N datasheet?

UC3879N Datasheet Download

Official datasheet from Texas Instruments

What are equivalent replacements for UC3879N?

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

Frequently Asked Questions

What is the input voltage range of the UC3879N?

The UC3879N operates with an input voltage range of 11V to 20V, with a nominal operating voltage of 12V. This makes it suitable for standard 12V bus power supply designs in telecom and industrial applications.

What control modes does the UC3879N support?

The UC3879N supports both current-mode and voltage-mode control, as well as peak current (IPK) control. Its control technique combines pulse width modulation (PWM) with resonant control, enabling efficient phase-shift operation in full-bridge converter topologies.

What package type is the UC3879N available in?

The UC3879N comes in a 20-pin dual in-line package (DIP), specifically the R-PDIP-T20 package. This through-hole package is ideal for prototyping and industrial designs requiring robust mechanical mounting.

What are typical applications for the UC3879N?

The UC3879N is commonly used in phase-shift full-bridge DC-DC converters, LLC resonant converters, telecom rectifiers, server power supplies, and industrial SMPS. Its resonant control capability helps achieve zero-voltage switching (ZVS) to reduce switching losses at high frequencies.

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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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AvailabilityIn Stock

Reference Price (USD)

From $5.3250

Buy from 1pc · Factory-direct pricing

Qty.	Unit Price	Ext. Price
1+	$9.2300	$9.23
2+	$7.1000	$14.20
4+	$6.1350	$24.54
5+	$5.3250	$26.63

pcs

Unit price: $9.2300 · Total: $9.23

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Lead Time3-7 business days

MOQFrom 1 piece

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OriginChina (Authorized)

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UC3879N Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock

What are the key features of UC3879N?

What is UC3879N used for?

What are the specifications of UC3879N?

Compliance & Regulatory

Where can I find the UC3879N datasheet?

What are equivalent replacements for UC3879N?

Frequently Asked Questions

What is the input voltage range of the UC3879N?

What control modes does the UC3879N support?

What package type is the UC3879N available in?

What are typical applications for the UC3879N?

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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