SG6980SZ

The SG6961 is an 8-pin boundary mode PFC controller IC intended for controlling PFC pre-regulators.
The SG6961 provides a controlled on-time to regulate the output DC voltage and achieve natural power factor correction.
The maximum on-time of the external switch is programmable to ensure safe operation during AC brownouts. An innovative multi-vector error amplifier is built in to provide rapid transient response and precise output voltage clamping. A built-in circuit disables the controller if the output feedback loop is opened.
The start-up current is lower than 20µA and the operating current is under 4.5mA.
The supply voltage can be up to 20V, maximizing application flexibility.
FEATURES
• Boundary Mode PFC Controller
• Low Input Current THD
• Controlled On-Time PWM
• Zero-Current Detection
• Cycle-by-Cycle Current Limiting
• Leading-Edge Blanking Instead of RC Filtering
• Low Start-up Current (10µA Typical)
• Low Operating Current (4.5mA Typical)
• Feedback Open-Loop Protection
• Programmable Maximum On-Time (MOT)
• Output Over-Voltage Clamping Protection
• Clamped Gate Output Voltage 16.5VAPPLICATIONS
• Electric Lamp Ballasts
• AC-DC Switching Mode Power Converter
• Open-Frame Power Supplies and Power Adapters
• Flyback Power Converters with ZCS/ZVS