Description

The CoolSET® -Q1 series (ICE2QRxx65Z) is the first generation of quasi-resonant integrated power ICs. It is optimized for off-line switch mode power supply applications such as LCD monitor, DVD R/W, DVD Combo, Blue-ray DVD, set top box, etc. Operating the MOSFET switch in quasi-resonant mode, lower EMI, higher efficiency and lower voltage stress on secondary diodes are expected for the SMPS. Based on the BiCMOS technology, the CoolSET® -Q1 series has awide operation range (up to 25V) of IC power supply and lower power consumption. It also offers many advantages such as quasi-resonant operation till very low load which increases the average system efficiency,

Active Burst Mode operation which enables an ultra-low power consumption at standby mode with small and controllable output voltage ripple, etc.

Features

• 650V avalanche rugged CoolMOS® with built-in startup cell

• Quasi resonant operation till very low load

• Active burst mode operation for low standby input power (< 0.1W)

• Digital frequency reduction with decreasing load for reduced switching loss

• Built-in digital soft-start

• Foldback point correction and cycle-by-cycle peak current limitation

• Maximum on/off time limitation

• Auto restart mode for VCC Overvoltage and Undervoltage protections

• Auto restart mode for overload protection

• Auto restart mode for overtemperature protection

• Latch-off mode for adjustable output overvoltage protection and transformer short-winding protection