FAN7621SSJ屬于集成電路（IC）的ACDC轉(zhuǎn)換器離線開(kāi)關(guān)。由安森美半導(dǎo)體公司制造生產(chǎn)的FAN7621SSJAC DC 轉(zhuǎn)換器，離線開(kāi)關(guān)該系列是元器件級(jí)控制產(chǎn)品，用于構(gòu)建將交流市電轉(zhuǎn)換為直流電（通常電壓大幅降低）的設(shè)備。集成和未集成系統(tǒng)主要開(kāi)關(guān)元件的器件均包括在內(nèi)。由于高輸入輸出電壓比，以及此類(lèi)系統(tǒng)中通常需要隔離，這些器件通常與外部變壓器配合使用。盡管通常使用定制變壓器來(lái)實(shí)現(xiàn)此用途，但也有許多專(zhuān)門(mén)用于此用途的庫(kù)存產(chǎn)品，請(qǐng)參見(jiàn)“開(kāi)關(guān)轉(zhuǎn)換器，SMPS 變壓器”標(biāo)題。

描述 Description

The FAN7621S is a pulse frequency modulation controller for high-efficiency half-bridge resonant converters. Offering everything necessary to build a reliable and robust resonant converter, the FAN7621S simplifies designs and improves productivity, while improving performance. The FAN7621S includes a highside gate-drive circuit, an accurate current-controlled oscillator, frequency-limit circuit, soft-start, and built-in protection functions. The high-side gate-drive circuit has a common-mode noise cancellation capability, which guarantees stable operation with excellent noise immunity.

特性 Features

■ Variable Frequency Control with 50 Duty Cycle for Half-bridge Resonant Converter Topology

■ High Efficiency through Zero Voltage Switching (ZVS)

■ Fixed Dead Time: 350ns

■ Up to 300kHz Operating Frequency

■ Auto-Restart Operation for All Protections with an External LVCC

■ Protection Functions: Over-Voltage Protection (OVP), Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD)

Applications

■ PDP and LCD TVs

■ Desktop PCs and Servers

■ Adapters

■ Telecom Power Supplies

■ Video Game Consoles