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SG6961 - Power Factor Controller

Description

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.

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 Voltag.

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Full PDF Text Transcription

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Product Specification Power Factor Controller www.DataSheet4U.com SG6961 DESCRIPTION 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.
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