UC2854M 高功率因素前置稳压器_BDTIC代理TI 德州仪器UC2854M

UC2854M 高功率因素前置稳压器

The UC3854A/B products are pin compatibleenhanced versions of the UC3854. Like the UC3854, 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 UC3854A/B 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 amplifierwith soft-start, line voltage feedforward (VRMS squarer), input supply voltage clamp, and over current comparator round out the lilst of feataures

	UC2854M
UVLO Thresholds On/Off (V)	10.5/10
Operating Supply (Max) (V)	20
Startup Current (mA)	0.25
Operating Supply Current (mA)	12
Vref (V)	7.5
Vref tol (%)	1.3
Duty Cycle (Max) (%)	95
Practical Operating Frequency (Max) (MHz)	0.2
Pin/Package	16CDIP
Rating	Military

UC2854M 特性

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

UC2854M 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
UC2854J	ACTIVE	-40 to 85	7.62 \| 100u	CDIP (J) \| 16	1 \| TUBE

UC2854M 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
UC2854J	TBD	A42	N/A for Pkg Type	UC2854J	UC2854J

UC2854M 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