“The CoolSET-Q1 series (ICE2QRxx65) is the first generation of quasi-resonant integrated power ICs. It is optimised for off-line switch mode power supply applications such as LCD monitor, DVD R/W, DVD Combo, Blu-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 a wide operating range (up to 25V) of IC power supply and lower power consumption. It also offers many advantages such as: a quasi-resonant operation till very low load increasing the average system efficiency 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.

Features

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