ICE2QS03屬于集成電路（IC）的ACDC轉(zhuǎn)換器離線開關(guān)。由英飛凌科技股份公司制造生產(chǎn)的ICE2QS03AC DC 轉(zhuǎn)換器，離線開關(guān)該系列是元器件級控制產(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實現(xiàn)此用途，但也有許多專門用于此用途的庫存產(chǎn)品，請參見“開關(guān)轉(zhuǎn)換器，SMPS 變壓器”標(biāo)題。

Product Highlight

? Active burst mode for low standby power

? Digital frequency reduction for better overall system efficiency

? Integrated power cell for IC self-power supply

描述 Description

ICE2QS03 is a quasi-resonant PWM controller optimized for off-line switch power supply applications such as LCD TV, CRT TV and notebook adapter. The digital frequency reduction with decreasing load enables a quasi-resonant operation till very low load. As a result, the overall system efficiency is significantly improved compared to other conventional solutions. The active burst mode operation enables an ultra-low power consumption at standby mode with small and controllable output voltage ripple. Based on the BiCMOS technology, the product has a wide operation range (up to 26V) of IC power supply and lower power consumption. The numerous protection functions give a full protection of the power supply system in failure situations. All of these make the ICE2QS03 an outstanding controller for quasi-resonant flyback converter in the market.

特性 Features

? Quasiresonant operation till very low load

? Active burst mode operation at light/no load for low standby input power (< 100mW)

? Digital frequency reduction with decreasing load

? Power cell for VCC pre-charging with constant current

? Built-in digital soft-start

? Foldback correction and cycle-by-cycle peak current limitation

? Auto restart mode for VCC Overvoltage protection

? Auto restart mode for VCC Undervoltage protection

? Auto restart mode for openloop/overload protection

? Latch-off mode for adjustable output overvoltage protection

? Latch-off mode for Short-winding protection