UC1854

現行

高功率因數前置穩壓器

產品詳細資料

Vin (max) (V) 30 Operating temperature range (°C) -55 to 125 Control mode CCM Topology Boost, PFC controller Rating Military Features Average current mode, Continuous Control Mode, Enable Duty cycle (max) (%) 95
Vin (max) (V) 30 Operating temperature range (°C) -55 to 125 Control mode CCM Topology Boost, PFC controller Rating Military Features Average current mode, Continuous Control Mode, Enable Duty cycle (max) (%) 95
CDIP (J) 16 135.3552 mm² 19.56 x 6.92
  • Control Boost PWM to 0.99 Power Factor
  • Limit Line-Current Distortion to < 5%
  • World-Wide Operation Without Switches
  • Feedforward Line Regulation
  • Average Current-Mode Control
  • Low Noise Sensitivity
  • Low Startup Supply Current
  • Fixed-Frequency PWM Drive
  • Low-Offset Analog Multiplier and Divider
  • 1-A Totem-Pole Gate Driver
  • Precision Voltage Reference
  • Control Boost PWM to 0.99 Power Factor
  • Limit Line-Current Distortion to < 5%
  • World-Wide Operation Without Switches
  • Feedforward Line Regulation
  • Average Current-Mode Control
  • Low Noise Sensitivity
  • Low Startup Supply Current
  • Fixed-Frequency PWM Drive
  • Low-Offset Analog Multiplier and Divider
  • 1-A Totem-Pole Gate Driver
  • Precision Voltage Reference

The UC1854 provides active-power factor correction for power systems that otherwise would draw non-sinusoidal current from sinusoidal power lines. This device implements all the control functions necessary to build a power supply capable of optimally using available power-line current while minimizing line-current distortion. To do this, the UC1854 contains a voltage amplifier, an analog multiplier and divider, a current amplifier, and a fixed-frequency PWM.

In addition, the UC1854 contains a power MOSFET-compatible gate driver, 7.5-V reference, line anticipator, load-enable comparator, low-supply detector, and overcurrent comparator.

The UC1854 uses average current-mode control to accomplish fixed-frequency current control with stability and low distortion. Unlike peak current-mode, average current control accurately maintains sinusoidal line current without slope compensation and with minimal response to noise transients.

The high reference voltage and high oscillator amplitude of the UC1854 minimize noise sensitivity while fast PWM elements permit chopping frequencies above 200 kHz. The UC1854 is used in single-phase and three-phase systems with line voltages that vary from 75 V to 275 V and line frequencies across the 50-Hz to 400-Hz range. To reduce the burden on the circuitry that supplies power to this device, the UC1854 features low starting supply current.

These devices are available packaged in 16-pin plastic and ceramic dual in-line packages, and a variety of surface-mount packages.

The UC1854 provides active-power factor correction for power systems that otherwise would draw non-sinusoidal current from sinusoidal power lines. This device implements all the control functions necessary to build a power supply capable of optimally using available power-line current while minimizing line-current distortion. To do this, the UC1854 contains a voltage amplifier, an analog multiplier and divider, a current amplifier, and a fixed-frequency PWM.

In addition, the UC1854 contains a power MOSFET-compatible gate driver, 7.5-V reference, line anticipator, load-enable comparator, low-supply detector, and overcurrent comparator.

The UC1854 uses average current-mode control to accomplish fixed-frequency current control with stability and low distortion. Unlike peak current-mode, average current control accurately maintains sinusoidal line current without slope compensation and with minimal response to noise transients.

The high reference voltage and high oscillator amplitude of the UC1854 minimize noise sensitivity while fast PWM elements permit chopping frequencies above 200 kHz. The UC1854 is used in single-phase and three-phase systems with line voltages that vary from 75 V to 275 V and line frequencies across the 50-Hz to 400-Hz range. To reduce the burden on the circuitry that supplies power to this device, the UC1854 features low starting supply current.

These devices are available packaged in 16-pin plastic and ceramic dual in-line packages, and a variety of surface-mount packages.

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類型 標題 日期
* Data sheet UCx854 High-Power Factor Preregulator datasheet (Rev. A) PDF | HTML 2016年 12月 16日
* SMD UC1854 SMD 5962-93261 2016年 6月 21日
* Radiation & reliability report UC1854BMDWREP Reliability Report 2014年 12月 22日
Application note AC Requirements for Power Factor Correction Circuits 2002年 3月 28日
Application note Accurate PWM Duty Cycle Clamp 2002年 1月 25日
Application note DN-39E Optimizing Performance in UC3854 Power Factor Correction Applications 1999年 9月 5日
Application note DN-41 Extend Current Transformer Range 1999年 9月 5日
Application note U-134 UC3854 Controlled Power Factor Correction Circuit Design 1999年 9月 5日

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CDIP (J) 16 Ultra Librarian

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