TOP244R-TL – POWER INTEGRATIONS

Overview

The TOP244R-TL is an integrated off-line switcher IC from the TOPSwitch-GX family manufactured by Power Integrations. Designed for isolated flyback power supplies, it integrates a high-voltage power MOSFET, PWM controller, oscillator, thermal shutdown, and comprehensive protection circuitry within a single device. Operating at a fixed 132kHz switching frequency, the TOP244R enables power supply designs up to approximately 50W (depending on input voltage and thermal design). The device supports universal AC input operation and is supplied in a TO-263-7C (D2PAK) surface-mount package, facilitating compact, high-efficiency AC-DC converter designs with reduced external component count.

Key Features

• Integrated high-voltage power MOSFET and PWM controller
• Fixed 132kHz switching frequency
• Output Power: Up to ~50W (application dependent)
• Optimized for Universal AC Input (85–265VAC)
• Built-in Line Undervoltage, Overvoltage, and Overtemperature Protection
• Cycle-by-Cycle Current Limiting
• Auto-Restart Fault Protection
• TO-263-7C (D2PAK) Surface-Mount Package

Applications

The TOP244R-TL is intended for high-efficiency isolated flyback converters requiring minimal external circuitry and robust fault protection. Its high level of integration simplifies EMI compliance and enhances system reliability in compact offline power supply designs.

• AC-DC Power Supplies
• Offline Adapters
• Battery Chargers
• Appliance and Industrial Auxiliary Supplies
• Consumer Electronics Power Converters