The SQ6562 is a cost effective high performance transitionmode (TM)power factor correction (PFC) controller IC optimized for high PFC LED driver, battery chargers and pre-regulator applications. The SQ6562 integrates an internal start-up timer, a highly linear multiplier with Total Harmonics Distortion(THD)optimizer for near unity power factor, a Zero Current Detector (ZCD) to ensure transitionmode operation and a current sensing comparator with built-in leading edge blanking. With ZCD control,power MOSFET is always turned on with zero inductor current. Consequently, transition-mode control achieves lower switching loss and reduced noise.

The SQ6562 offers great protection coverage including system accurate adjustable over-voltage protection(OVP),input under-voltage lockout (UVLO), multiplier output clamp and GD output clamp for external power MOSFET protection.The totem pole output stage is capable of delivering sink/source drive current of +800mA/-600mA.

The SQ6562 is available in SOP-8 package.

Features

• Single stage fly-back controller with PFC

• Transition-mode operation

• Ultra-lowstart-up current

• Internal start-up timer

• Low operating supply current

• Low quiescent current

• Disable function on error amplifier (E/A) input

• Totem pole, push-pull output drive

• Adjustable output over-voltage protection

• Under-voltage lockout with hysteresis

• 1% Precision internal reference voltage

 Typical Applications 

• Fly-back power converters

• PFC pre-regulators to meetlEC61000-3-2

• Hi-end AC-DC adapter/charger

• Electronic single stage LED driver

• Electronic Ballast