TOP227Y

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The TOP227Y is a high-performance integrated off-line switcher designed for use with power supplies with 110VAC or 220VAC inputs. It features a low start-up current, adjustable output current, built-in over-voltage protection, and a thermally enhanced package that improves its overall thermal performance. The TOP227Y also features current-mode control, internal self oscillation and feedback frequency compensation.

The TOP227Y utilizes an external MOSFET for AC-DC conversion. This is due to its low switching frequency, which helps to minimize the switching losses associated with high frequency AC-DC converting applications. It also reduces the output currents required for the same output power. The topology of the TOP227Y makes it well suited for a variety of applications, including domestic electronics, white goods, and low power applications.

The TOP227Y offers a wide input voltage range of 85VAC to 265VAC, a low start-up current of 0.17A max, a peak output current of up to 1.2A, and a maximum output power of up to 7.5W. The design includes a current-mode architecture, which provides improved load and line rejection, minimized circuit sensitivity to component tolerances, and wide frequency response. Additionally, the integrated internal start-up circuit allows for the minimum external component count and improved system reliability.

The TOP227Y features over-voltage protection, which is designed to protect the supply voltage from any over-voltage surges or transients. It can be adjusted to any desired level and has an integration time of 30ms to 350ms. Finally, the TOP227Y utilizes a conventional thermal enhanced thermal package to improve its overall thermal performance, which reduces PCB space and eliminates additional cooling requirements.

Overall, the TOP227Y is an ideal solution for a range of AC-DC conversion applications. Its wide input voltage range and low start-up current make it suitable for a variety of demanding applications, while the current-mode architecture provides excellent performance and reliability. Additionally, the integration of an over-voltage protection circuit and improved thermal performance result in a product that offers an excellent level of protection and reliability for any AC-DC conversion application.

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