UCC3580N-2

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UCC3580N-2 is an AC/DC converter IC which can be used for offline switcher applications. This IC contains integrated pulse width modulation (PWM) control, synchronous rectification and output voltage pre-regulation circuitry. It has a wide input voltage range from 4.5V to 28V and can be used for multiple output voltage and power level designs. The maximum output current can be as high as 4A.

The IC has a wide output voltage range from 1.25V to 20V with a accuracy of ±2%. The synchronization frequency can be adjusted freely from 20kHz to 100kHz and the switching frequency can be set up to 400rad/s. It can achieve 95% efficiency in buck/boost configurations. It also has an adjustable frequency spread spectrum feature which can help reduce EMI and increase overall system stability.

The main application field for the UCC3580N-2 IC is for offline switchers. Offline switchers are used in many consumer and industrial electronics such as televisions, microwave ovens, air conditioners, vending machines and so on. With its integrated PWM control circuit and synchronous rectification, the IC is ideal for low cost and low power designs. It is also highly suitable for applications that require a high level of efficiency and stability.

The working principle of UCC3580N-2 mainly relies on the PWM control circuit and the synchronous rectification circuit. The PWM control circuit first takes the input voltage and compares it with the reference voltage. Then it generates a PWM signal based on the comparison result. The PWM signal will control the synchronous rectification circuit to switch the rectifier for output voltage regulation. The synchronous rectification circuit is composed of a high voltage MOSFET and a low voltage MOSFET which will be alternately switch to get higher efficiency. The output voltage will be fed back to the reference voltage control circuit for feedback control.

To sum up, UCC3580N-2 is a very versatile AC/DC converter IC suitable for offline switcher applications. It has wide input and output voltage range, high efficiency and stability which make it an ideal choice for many consumer and industrial applications. The PWM control circuit and synchronous rectification together with the output voltage pre-regulation circuitry can achieve the desired result in different applications.

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