The FAN6961 is an 8-pin, boundary-mode, power factor correction controller intended for controlling PFC pre-regulators. The FAN6961 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 startup current is lower than 20 µA and the operating current has been reduced to under 6 mA. The supply voltage can be up to 25 V, maximizing application flexibility.
●Features
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● 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 Startup Current: 10 µA Typical
● Low Operating Current: 4.5 mA Typical
● Feedback Open-Loop Protection
● Programmable Maximum On-Time (MOT)
● Output Over-Voltage Clamping Protection
● Clamped Gate Output Voltage 16.5 V
