TEA1733T/N1,118 Integrated Circuits (ICs)

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PMIC - AC DC Converters, Offline Switchers

The TEA1733T/N1,118 is an AC/DC switch-mode power supply with an integrated PFC (Power Factor Correction) stage and quasi-resonant controller IC, specifically designed to replace linear metal oxide varistor (MOV) based designs. It includes full protection, such as overload and over-temperature protection, as well as multiple input voltage selections.

The TEA1733T/N1,118 provides one or two outputs, with a maximum output current of 118A. It has a wide input voltage range, improved PF and a standby current down to 7mA. It is compatible with NEMA, IEC60320 and other international standards, and the output power is adjustable via external resistors.

The TEA1733T/N1,118 is suitable for general purpose switching applications such as LED lighting, set top boxes, chargers, computer power supply, annunciators and ATX PC power supplies. It also compliant with safety standards such as IEC62368 and UL1310.

Working Principle

The working principle of the TEA1733T/N1,118 AC/DC switch-mode power supply is based on the design of a quasiresonant (QR) converter, which is composed of a Power Factor Correction (PFC) stage followed by a Controlled On-Demand (COD) primary stage.

The PFC Boost stage accepts a wide input voltage range AC supply and converts it into a regulated high DC voltage. This DC voltage is then used to feed the QR primary stage. The primary stage is designed to operate at a switching frequency which is dependent on the output voltage. The QR primary stage also uses a special current mode control to produce high power with low levels of switching losses.

The power is then fed to the secondary stage, where the output voltage is regulated and protected. The secondary stage also includes a constant current output and a power fail signal output. The TEA1733T/N1,118 also provides an optional forced continuous conduction mode (FCCM) operation which makes it suitable for a wide range of output currents.

Features

• High power conversion efficiency
• Integrated overload, over-temperature, open/short protection and cross-conduction protection
• Wide input voltage range AC97-264V 50/60Hz
• High Power Factor and low Standby current
• Compatible with NEMA, IEC60320, and UL input compliance
• Output power is adjustable via external resistors
• Compliant to IEC62368, EN/UL 60950, UL1310 and other safety standards
• Compact format, small size

In short, the TEA1733T/N1,118 AC/DC switch-mode power supply is an affordable, efficient, and reliable solution for a wide range of switching applications. It has the ability to handle high voltage input, and a wide range of output currents. The output power can be adjusted through the use of external resistors, while full protection features ensure reliable operation in any conditions.

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