PFC-440 (KN-2389) Rechargeable Fan & Light Universal Charger Circuit Board
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৳ 320.00৳ 380.00 (-16%)
Product Short Description
The KN-2389 (PFC-440) is a universal 6V AC/DC rechargeable emergency fan control circuit board. It serves as a direct replacement motherboard for multi-functional portable cooling fans and integrated emergency LED lights.
Key Features
- Dual-Mode Charging: Manages efficient float charging for 6V lead-acid batteries via an AC step-down transformer or DC input.
- Integrated Control Switches: Features built-in dual slide switches to toggle between multiple fan speeds (High/Low/Off) and emergency lighting modes.
- Universal Compatibility: Widely compatible as a repair or DIY replacement module for major emergency fan brands, including Sunca, Kennedy, Defender, and Midea.
- Onboard Protection: Engineered with premium 105°C-rated electrolytic capacitors and discrete switching transistors for stable power regulation and noise filtration.
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PFC-440 (KN-2389) Rechargeable Fan & Light Universal Charger Circuit Board
The PFC-440 (KN-2389) Universal AC/DC 6V Rechargeable Fan and Light Controller Motherboard serves as an all-in-one replacement control module designed to restore multi-functional emergency home appliances. Engineered primarily for high-demand emergency appliances, this durable PCB serves as a drop-in internal solution across various commercial product lines.
PFC-440 (KN-2389) Rechargeable Fan & Light Universal Charger Circuit Board
Functional Overview
The main architecture integrates power rectification, variable speed logic, light regulation, and battery protection circuits into a unified compact board. It functions as a complete drop-in core module when original factory circuit boards fail due to voltage surges, component aging, or chemical corrosion from older lead-acid batteries. Instead of replacing the complete unit, this board serves as a cost-effective maintenance path. [1, 2]
Technical Specifications
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- Input Voltage: Supports dual input options including mains power AC 220V–240V (50/60Hz) or direct auxiliary DC 6V charging input.
- System Operating Voltage: Optimized for standardized DC 6V low-power infrastructure. [1]
- Outputs:
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- High/Low speed DC Fan Motor node.
- Variable/Static internal Emergency LED Light driver rail.
- Automated 6V Lead-Acid Battery connection circuit
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- Safety Systems: Integrated overcharge protection prevents thermal overload, while discharge control safeguards connected lead-acid batteries from voltage depletion, prolonging cumulative battery lifespan. [1]
- User Control Interfaces: Dual multi-position slide toggle switches handle rapid state-switching (High/Off/Low) for fan blades and light panel arrays.
PFC-440 (KN-2389) Rechargeable Fan & Light Universal Charger Circuit Board
Comprehensive Brand Compatibility
This universal control board features standardized trace connections and voltage outputs, making it widely cross-compatible with several regional appliance brands:
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- Sunca (Emergency Fan lines)
- Defender (Rechargeable utility fans)
- Midea (Compact AC/DC personal fans)
- Kennedy (Portable emergency power models)
PFC-440 (KN-2389) Rechargeable Fan & Light Universal Charger Circuit Board
On-Board Layout & Verification
The board layout is visually distinct, housing localized power-filtering electrolytic capacitors, current-limiting resistors, switching transistors, and protective rectifier diodes. Two vertical LED status indicators provide immediate visual diagnostics, reflecting current active mains line connection or ongoing battery charge status.
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