IC TNY245

IC TNY245 Power Integrations TinySwitch-II – Off-Line PWM Switcher IC of IC TNY245

The IC TNY245 is a highly reliable TinySwitch-II off-line PWM switcher IC from Power Integrations, designed for compact and energy-efficient SMPS power supply circuits. This integrated power management IC combines a 700V power MOSFET, oscillator, control logic, current limiting, thermal shutdown, and auto-restart protection in a single package, making it ideal for low-power AC-DC converter applications. It belongs to the TinySwitch-II family, which supports approximately 4W to 23W output power designs depending on input voltage and transformer design.

The TNY245 IC is widely used in LED TVs, set-top boxes, chargers, adapters, DVD players, home appliances, standby power supplies, and industrial control boards. Its built-in frequency jittering technology reduces EMI by around 10 dB, helping designers minimize external filter components and lower overall circuit cost. The 132 kHz switching frequency allows the use of smaller transformers, making it perfect for compact electronic boards and repair applications.

One of the key advantages of the TNY245 Power IC is its auto-restart fault protection, which protects the circuit during short circuits, overload, and open-loop faults. The integrated line under-voltage sensing prevents unstable startup and power glitches, while the thermal shutdown feature improves long-term reliability in high-temperature environments. These features make it a popular choice for electronics technicians, TV repair engineers, and SMPS designers.

This IC is commonly available in DIP-8 and SMD packages, making it easy to install in both new circuit designs and replacement repairs. If you are repairing a dead power board or designing a low-power flyback supply, the TNY245 TinySwitch-II IC offers excellent performance, low standby power consumption, and reduced external component count.

Key Features of IC TNY245

• TinySwitch-II off-line switcher IC
• Integrated 700V MOSFET
• Built-in thermal shutdown
• Auto-restart short circuit protection
• Low EMI frequency jittering
• 132 kHz switching frequency
• Ideal for TV SMPS and chargers
• High efficiency and low standby loss

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