UC2854B-EP是TI公司的一款功率因数校正产品，UC2854B-EP是增强型产品高级高功率因数前置稳压器，本页介绍了UC2854B-EP的产品说明、应用、特性等，并给出了与UC2854B-EP相关的TI元器件型号供参考。
UC2854B-EP - 增强型产品高级高功率因数前置稳压器 - 功率因数校正 - 离线隔离型DC/DC控制器和转换器 - TI公司（Texas Instruments，德州仪器）
- Controlled Baseline
- One Assembly/Test Site, One Fabrication Site
- Extended Temperature Performance of −55°C to 125°C
- Enhanced Diminishing Manufacturing Sources (DMS) Support
- Enhanced Product-Change Notification
- Qualification Pedigree (1)
- Controls Boost PWM to Near-Unity Power Factor
- Limits Line Current Distortion to <3%
- World-Wide Operation Without Switches
- Accurate Power Limiting
- Fixed-Frequency Average Current-Mode Control
- High Bandwidth (5 MHz), Low-Offset Current Amplifier
- Integrated Current- and Voltage Amplifier Output Clamps
- Multiplier Improvements: Linearity, 500 mV VAC Offset (Eliminates External Resistor), 0 V to 5 V Multout Common-Mode Range
- VREF GOOD Comparator
- Faster and Improved Accuracy ENABLE Comparator
- UVLO Options (16 V/10 V or 10.5 V/10 V)
- 300-μA Start-Up Supply Current
Industrial Lighting
The UC2854B products are pin compatible enhanced versions of the UC2854. Like the UC2854, these products provide all of the functions necessary for active power factor corrected preregulators. The controller achieves near unity power factor by shaping the ac-input line current waveform to correspond to the ac-input line voltage. To do this the UC2854B uses average current mode control. Average current mode control maintains stable, low distortion sinusoidal line current without the need for slope compensation, unlike peak current mode control.
A 1% 7.5-V reference, fixed frequency oscillator, PWM, voltage amplifier with soft-start, line voltage feedforward (VRMS squarer), input supply voltage clamp, and over current comparator round out the list of features.
The UC2854B is available in a DW (SOIC-wide) package.
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| UC2854B-EP | SOIC (16) | 10.30 mm × 7.50 mm |
