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The MC33261P is a power factor correction (PFC) controller IC manufactured by Motorola (MOTO). Below are its key specifications, descriptions, and features:

Specifications:

• Manufacturer: Motorola (MOTO)
• Type: Power Factor Correction (PFC) Controller
• Package: PDIP-8 (Plastic Dual In-Line Package)
• Operating Voltage Range: 10V to 16V
• Maximum Supply Voltage: 20V
• Operating Temperature Range: -40°C to +105°C
• Switching Frequency: Adjustable (typically up to 250 kHz)
• Output Drive Current: ±500mA (peak)
• Standby Current: < 1mA

Descriptions:

• The MC33261P is designed for active power factor correction in AC/DC power supplies.
• It operates in critical conduction mode (transition mode), ensuring high efficiency and low harmonic distortion.
• Features average current mode control for stable PFC operation.
• Includes overvoltage protection (OVP), undervoltage lockout (UVLO), and soft-start functionality.

Features:

• Average Current Mode Control for precise PFC regulation.
• Zero Current Detection (ZCD) for transition mode operation.
• Programmable Switching Frequency via external components.
• Internal Start-Up Timer for controlled soft-start.
• Low Standby Power Consumption (< 1mA).
• Wide Operating Temperature Range (-40°C to +105°C).
• High Noise Immunity for robust performance in noisy environments.

The MC33261P is commonly used in switch-mode power supplies (SMPS), LED drivers, and other applications requiring power factor correction.

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