Power Integrations

TOP232YN  

AC DC Converters, Offline Switches

TOP232YN Description

The TOP232YN from Power Integrations is an obsolete but highly capable offline flyback switcher IC, designed for isolated AC/DC power conversion applications. Housed in a TO-220-7B package, this through-hole-mount device integrates a 700V breakdown voltage MOSFET, enabling robust performance in offline power supplies. With a 25W power rating, it operates at a switching frequency range of 66kHz to 132kHz, adjustable via frequency control, and supports a high 78% duty cycle. Its integrated fault protections—including current limiting, over-temperature, and over-voltage—ensure reliable operation in demanding environments. Compliant with RoHS and REACH Unaffected, it suits legacy designs requiring dependable offline switching.

TOP232YN Features

• Topology: Flyback with isolated output for safety-critical designs.
• Integrated 700V MOSFET: Reduces external component count and board space.
• Advanced Protections: Combines current limiting, over-temperature, and over-voltage for robust fault handling.
• Wide Frequency Range (66kHz–132kHz): Enables optimization for efficiency or size.
• High Duty Cycle (78%): Maximizes power delivery in constrained designs.
• Compliance: RoHS Compliant and REACH Unaffected, meeting environmental standards.
• Package: TO-220-7B for easy through-hole mounting and thermal management.

TOP232YN Applications

Ideal for low-to-medium power offline supplies, the TOP232YN excels in:

• Industrial Power Supplies: Reliable operation in harsh conditions with fault protections.
• Consumer Electronics: Compact AC/DC adapters for appliances/chargers.
• LED Drivers: Stable output isolation for lighting systems.
• Legacy Equipment Upgrades: Replacing older designs needing 25W flyback solutions.
• Auxiliary Power Modules: For telecom or networking equipment requiring isolated rails.

Conclusion of TOP232YN

The TOP232YN combines high integration, robust protections, and flexible frequency control in a proven flyback topology. While obsolete, its 700V MOSFET, 25W capability, and fault resilience make it a pragmatic choice for legacy or cost-sensitive designs. Engineers valuing simplicity, isolation, and reliability in offline power conversion will find it a compelling option, particularly in industrial and consumer applications where durability is critical. For modern designs, consider newer alternatives from Power Integrations’ portfolio.

TOP232YN Documents

Download datasheets and manufacturer documentation for TOP232YN

PCN Assembly/Origin :

Mult Devices Wire 12/May/2018      

Datasheets :

TOP232 - 234      

PCN Obsolescence/ EOL :

TOP23yyy 27/Jan/2022