TNY274PN

Updated: 2026-07-15

Overview

The TNY274PN is a member of the TinySwitch-III family of offline switcher ICs, developed by Power Integrations. It is designed for low-power applications, offering high efficiency and compact design. The IC integrates a 700 V power MOSFET, oscillator, and control circuitry, simplifying power supply designs. This device is widely used in consumer electronics, industrial controls, and lighting systems. Its ability to operate in a wide input voltage range and its low standby power consumption make it a popular choice for energy-efficient applications.

Structure and Working Principle

The TNY274PN combines a high-voltage MOSFET, a PWM controller, and protection features in a single package. The IC operates in a flyback topology, converting AC input to regulated DC output. The integrated oscillator ensures stable switching frequencies, while frequency jittering reduces electromagnetic interference (EMI). The device uses a simple ON/OFF control scheme, adjusting the duty cycle to maintain output regulation. This approach minimizes power loss and improves efficiency. The IC also includes features like line undervoltage lockout and thermal shutdown for enhanced reliability.

Key Features

The TNY274PN offers several standout features, including its integrated 700 V MOSFET, which eliminates the need for an external switching transistor. This reduces component count and board space. The IC's frequency jittering feature helps meet EMI standards without additional filtering components. Other notable features include auto-restart protection for overloads and short circuits, and a low standby power consumption of less than 100 mW. These attributes make the TNY274PN suitable for applications requiring high efficiency and reliability.

Application Areas

The TNY274PN is commonly used in low-power AC/DC converters, such as those found in consumer electronics (e.g., set-top boxes, routers) and industrial controls. Its compact size and efficiency also make it ideal for LED lighting drivers and auxiliary power supplies. In addition, the IC is employed in applications requiring energy-efficient standby modes, such as smart home devices and office equipment. Its robust design ensures reliable performance in diverse environments.

Maintenance and Precautions

Proper thermal management is critical when using the TNY274PN. Ensure adequate heat sinking or ventilation to prevent overheating. Adhere to the specified voltage and current limits to avoid damage to the IC. When designing circuits, follow the manufacturer's layout guidelines to minimize noise and EMI. Regularly inspect solder joints and connections for signs of wear or degradation, especially in high-temperature environments.

B2B Procurement Guide

When procuring the TNY274PN in bulk, verify the supplier's authenticity to avoid counterfeit components. Compare prices from multiple vendors, keeping in mind that volume purchases often attract discounts. Check for compliance with industry standards, such as RoHS and REACH, to ensure environmental and safety compliance. Lead times and stock availability should also be considered, especially for large-scale production runs.