| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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28,250 pcs
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28250 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The UC3854 from Texas Instruments is an integrated circuit designed for active power factor correction (PFC) in power systems. It enables power supplies to draw sinusoidal current from sinusoidal power lines, minimizing line-current distortion to less than 5% and achieving a power factor of up to 0.99. This device utilizes average current-mode control for stable, fixed-frequency PWM operation with low noise sensitivity.
Key features include a 1-A totem-pole gate driver, a precision 7.5-V voltage reference, and feedforward line regulation. The UC3854 supports worldwide operation without switches and is suitable for line voltages ranging from 75 V to 275 V across 50-Hz to 400-Hz line frequencies. It is available in various packages including SOIC, PLCC, CDIP, and PDIP.
Applications for the UC3854 include offline AC-to-DC converters for medical, industrial, telecom, and IT power supplies, as well as uninterruptible power supplies (UPS) and appliances. Its design minimizes line-current distortion and optimizes power-line current usage.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.75 | $0.75 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The UC3854 controls boost PWM to achieve a power factor of 0.99.
The UC3854 limits line-current distortion to less than 5%.
The UC3854 uses Average Current-Mode Control and Continuous Control Mode.
The UC3854 operates within a temperature range of 0°C to 70°C.
The UC3854 has a precision voltage reference of 7.5 V.
The UC3854 features a 1-A totem-pole gate driver.
The UC3854 supports line frequencies from 50 Hz to 400 Hz.