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參數(shù)資料
| 型號： | UC3854J |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | High Power Factor Preregulator |
| 中文描述： | 高功率因數(shù)前置穩(wěn)壓器 |
| 文件頁數(shù)： | 1/9頁 |
| 文件大?。?/td> | 281K |
| 代理商： | UC3854J |
6/98
BLOCK DIAGRAM
Control Boost PWM to 0.99 Power Factor
Limit Line Current Distortion To <5%
World-Wide Operation Without Switches
Feed-Forward Line Regulation
Average Current-Mode Control
Low Noise Sensitivity
Low Start-Up Supply Current
Fixed-Frequency PWM Drive
Low-Offset Analog Multiplier/Divider
1A Totem-Pole Gate Driver
Precision Voltage Reference
The UC1854 provides active power factor correction for power sys-
tems that otherwise would draw non-sinusoidal current from sinusoi-
dal 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/divider,
a current amplifier, and a fixed-frequency PWM. In addition, the
UC1854 contains a power MOSFET compatible gate driver, 7.5V ref-
erence, line anticipator, load-enable comparator, low-supply detector,
and over-current 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 UC1854’s high reference voltage and high oscillator amplitude
minimize noise sensitivity while fast PWM elements permit chopping
frequencies above 200kHz. The UC1854 can be used in single and
three phase systems with line voltages that vary from 75 to 275 volts
and line frequencies across the 50Hz to 400Hz 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.
UC1854
UC2854
UC3854
High Power Factor Preregulator
FEATURES
DESCRIPTION
UDG-92055
相關PDF資料 |
PDF描述 |
|---|---|
| UC3854L | High Power Factor Preregulator |
| UC1854DW | High Power Factor Preregulator |
| UC1855 | High Performance Power Factor Preregulator |
| UC186x | Resonant-Mode Power Supply Controllers |
| UC3866 | Resonant-Mode Power Supply Controllers |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UC3854N | 功能描述:功率因數(shù)校正 IC Pwr Factor Pre- RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| UC3854N | 制造商:UNITRODE 功能描述:IC POWER FACTOR CONTROLLER |
| UC3854N | 制造商:Texas Instruments 功能描述:IC CONTROLLER PWM 制造商:Texas Instruments 功能描述:IC, CONTROLLER, PWM |
| UC3854N/2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| UC3854N-F | 功能描述:功率因數(shù)校正 IC Hi Pwr FACTOR PREREG RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
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