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Updated at 17/06/2025 10:30:15(UTC+8)

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Description

High Power-Factor Preregulator
DESCRIPTION
The UC1852 provides a low-cost solution to active power-factor correction (PFC) for systems that would otherwise draw high peak current pulses from AC power lines. This circuit implements zero-current switched boost conversion, producing sinusoidal input currents with a minimum of external components, while keeping peak current substantially below that of fully-discontinuous converters.
The UC1852 provides controlled switch on-time to regulate the output bulk DC voltage, an off-time defined by the boost inductor, and a zero-current sensing circuit to reactivate the switch cycle. Even though switching frequency varies with both load and instantaneous line voltage, it can be maintained within a reasonable range to minimize noise generation.
FEATURES
• Low-Cost Power Factor Correction
• Power Factor Greater Than 0.99
• Few External Parts Required
• Controlled On-Time Boost PWM
• Zero-Current Switching
• Limited Peak Current
• Min and Max Frequency Limits
• Starting Current Less Than 1mA
• High-Current FET Drive Output
• Under-Voltage Lockout

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UC3852N Specifications

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charges, duties and taxes.
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- Please confirm with the logistics company in advance for remote areas.
(Additional charges ($35-$50) may apply for delivery in these areas)
- Delivery date: usually 2 to 7 working days.
- A tracking number will be sent after your order ships.
- Carefully inspected and packed by ManyChip warehouse
- Vacuum packaging
- Anti-static packaging
- Shockproof foam
The terms here are for reference only, the actual terms are subject to the sales quotation.
- Please confirm product specifications when ordering.
- MOQ refers to the minimum order quantity required to purchase each part.
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- Decapsulation control
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- XRF inspection
- Electrical testing
- Surface testing
-Digital components warehouse, covering an area of 800 square meters, with constant temperature and humidity

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SN:H3.67812LO38243V40Q0QC0S0

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