TEA18363LT/1J

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The TEA18363LT/1J is part of NXP’s family of low-frequency offline switchers, comprising of a single pulse transformer combining power switch and flyback converter in a single package. This part is widely applied in offline AC-DC conversions, typically as part of an AC power supply design. It is suitable for applications such as home appliances, production line machinery, office equipment, communication systems and other battery charger or lighting applications.

The TEA18363LT/1J is based on primary-side control, using patented Auto-Adaptive Primary Side Control (APSC) technology, producing a constant average output current with a wide range of line input voltage. This significantly reduces the design effort and provides higher efficiency (up to 91%) compared with other traditional offline switchers. As a result, much smaller form factor and higher reliability can be achieved.

The working principle of the TEA18363LT/1J is outlined as follows: It consists of two main components, a power switch, and a flyback converter. The power switch is a bipolar junction transistor (BJT) that is used to switch the DC voltage on the input side to the primary winding of the transformer. When the switch is turned on, the primary winding of the transformer is energized and the current is increased. The increasing magnetic field will induce an alternating current (AC) voltage on the secondary winding of the transformer. This AC voltage is rectified and regulated by a diode and the output filter capacitor. The average output current of the part is determined by the APSC controller, which senses the current flowing through the primary winding of the transformer and adjusts the duty cycle of the BJT to maintain a constant output voltage.

In summary, the TEA18363LT/1J is a member of NXP’s family of low-frequency offline switchers. It features low standby power consumption and high efficiency, making it ideal for AC-DC converter designs. Its primary-side control ensures optimal steady-state performance in a wide range of line input voltage, while its APSC controller provides reliable and accurate output current regulation. As such, it is the ideal solution for a variety of AC-DC conversion applications.

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