TNY379PN

PMIC - AC DC Converters, Offline Switchers

The TNY379PN is a high efficiency, off-line switcher specifically designed for low power non-isolated applications. The device features an efficient flyback power conversion design, PIN selectable fixed frequency or variable frequency operation, wide input voltage range of up to 370VAC and provides very low standby power consumption.

Application Field

TNY 379PN is ideal for a variety of off-line applications, for example, high power charger, adjustable speed drives, industrial factory automation and heating applications. All over-temperature protection and over-voltage protection circuits are included which makes the TNY 379PN ideal for harsh environments.

Working Principle

TNY 379PN\'s basic working principle is based on the transformer flyback topology with a variable frequency control. The IC controls the output power by varying the switching frequency of the power switch to maintain the constant DC output voltage over varying load conditions. The circuit features variable frequency or PIN selectable fixed frequency operation with a frequency range of 35kHz-120kHz and provides very low standby power consumption.

The IC also has built-in over-temperature and over-current protection circuits to protect the device against these conditions. The device also has high efficiency and low audible noise which makes it suitable for industrial applications requiring high efficiency operation.

Conclusion

The TNY379PN is a high efficiency, off-line switcher specifically designed for low power non-isolated applications. It is ideal for a variety of off-line applications and its high efficiency and low audible noise make it suitable for industrial applications. The IC features variable frequency or PIN selectable fixed frequency operation with a frequency range of 35kHz-120kHz and provides very low standby power consumption.