UC2854B-EP - 增强型产品高级高功率因数前置稳压器

UC2854B-EP是TI德州仪器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，本站介绍了UC2854B-EP的封装应用图解、特点和优点、功能等，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 - 德州仪器

产品特性

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

(1) Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.

产品应用

Industrial Lighting

产品说明

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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
UC2854B-EP	SOIC (16)	10.30 mm × 7.50 mm

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