POWER INTEGRATIONS TOP244PN TOPSwitch-GX Off-Line Switcher DIP8 28W

The POWER INTEGRATIONS TOP244PN is a TOPSwitch-GX EcoSmart integrated off-line switcher in an 8-pin DIP package. It integrates a high-voltage power MOSFET, PWM control, fault protection and other control circuitry onto a single CMOS chip, inheriting the proven TOPSwitch topology but with added functions that reduce system cost, improve design flexibility, and deliver high performance and energy efficiency.

This switcher features soft start, frequency jittering for lower EMI, a wider duty cycle (DCMAX), hysteretic thermal shutdown, and larger creepage packages. All critical parameters (current limit, frequency, PWM gain) have tighter temperature and absolute tolerances, simplifying design and optimising system cost.

Key Capabilities

• Output power: 28W at 230VAC; 20W at 85-265VAC (open-frame)
• Output power: 16W at 230VAC; 11W at 85-265VAC (non-ventilated enclosed adapter)
• Regulates to zero load without dummy loading
• 132kHz switching frequency (or 66kHz when frequency pin is connected to control) reduces transformer and power supply size
• Hysteretic thermal shutdown for automatic fault recovery
• Large thermal hysteresis prevents PC board overheating
• Extended power range for higher power applications

Technical Specifications

• Input voltage: 85VAC to 265VAC
• IC package: DIP, 8 pins
• Topology: Flyback, Isolated
• Power switch voltage rating: 700V
• Switch current rating: 1.6mA
• Operating junction temperature: -40°C to 150°C
• Mounting: Through hole

Whether for consumer electronics, portable devices, or power management, the TOP244PN offers robust, efficient, and flexible off-line power conversion in a compact, reliable design.