ICE2QR4765

离线SMPS准谐振PWM控制器 Off-Line SMPS Quasi-Resonant PWM Controller

Description

The CoolSET® -Q1 series ICE2QRxx65 is the first generation of quasi-resonant integarted 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. Operting the MOSFET switch in quasi-resonant mode, lower EMI, higher efficiency and lower voltage stress on secondary diodes are expected for the SMPS.

Product Highlights

• Active Burst Mode to reach the lowest standby power requirement

  <100mW@no load

• Quasi resonant operation

• Digital frequency reduction for better overall system efficiency

• Integrated 650V startup cell

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 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