UC2854B-EP 增强型产品高级高功率因数前置稳压器

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

	UC2854B-EP
Pin/Package	6SOT-23
Operating Temperature Range (C)	-55 to 125
Rating	HiRel Enhanced Product

UC2854B-EP 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
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

UC2854B-EP 芯片订购指南

器件	状态	温度 (oC)	价格（美元）	封装 \| 引脚	封装数量 \| 封装载体	丝印标记
UC2854BMDWREP	ACTIVE	-55 to 125	3.55 \| 100u	SOIC (DW) \| 16	2000 \| LARGE T&R
UC2854BMDWREPG4	ACTIVE	-55 to 125	3.55 \| 100u	SOIC (DW) \| 16	2000 \| LARGE T&R
V62/06612-01XE	ACTIVE	-55 to 125	3.55 \| 100u	SOIC (DW) \| 16	2000 \| LARGE T&R

UC2854B-EP 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
UC2854BMDWREP	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	UC2854BMDWREP	UC2854BMDWREP
UC2854BMDWREPG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	UC2854BMDWREPG4	UC2854BMDWREPG4
V62/06612-01XE	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	V62/06612-01XE	V62/06612-01XE

UC2854B-EP 工具与软件

培训内容	型号	软件/工具类型
最常用开关模式电源的功率级设计器	POWERSTAGE-DESIGNER	分析软件