UC2854L

更新时间： 2024-11-01 22:35:47

品牌	Logo	应用领域
德州仪器 - TI		稳压器开关式稳压器或控制器电源电路开关式控制器
页数	文件大小	规格书
9页	283K
描述
High Power Factor Preregulator

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中文翻译

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技术参数
数据手册

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UC2854L 技术参数

生命周期：	Obsolete	零件包装代码：	QLCC
包装说明：	CERAMIC, LCC-20	针数：	20
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.72
Is Samacsys：	N	模拟集成电路 - 其他类型：	POWER FACTOR CONTROLLER
控制模式：	CURRENT-MODE	控制技术：	PULSE WIDTH MODULATION
最大输入电压：	35 V	最小输入电压：	15 V
标称输入电压：	18 V	JESD-30 代码：	S-CQCC-N20
长度：	8.89 mm	功能数量：	1
端子数量：	20	最高工作温度：	85 °C
最低工作温度：	-40 °C	最大输出电流：	0.5 A
封装主体材料：	CERAMIC, METAL-SEALED COFIRED	封装代码：	QCCN
封装形状：	SQUARE	封装形式：	CHIP CARRIER
认证状态：	Not Qualified	座面最大高度：	2.54 mm
表面贴装：	YES	切换器配置：	BOOST
最大切换频率：	200 kHz	温度等级：	INDUSTRIAL
端子形式：	NO LEAD	端子节距：	1.27 mm
端子位置：	QUAD	宽度：	8.89 mm
Base Number Matches：	1

UC2854L 数据手册

UC1854

UC2854

UC3854

High Power Factor Preregulator

FEATURES

DESCRIPTION

•

Control Boost PWM to 0.99 Power Factor

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.

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

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.

Precision Voltage Reference

These devices are available packaged in 16-pin plastic and ceramic

dual in-line packages, and a variety of surface-mount packages.

BLOCK DIAGRAM

UDG-92055

6/98

12 3 4 5 6 7...9

中文翻译

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与UC2854L相关器件

型号	品牌	获取价格	描述	数据表
UC2854M	TI	获取价格	ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC2854N	TI	获取价格	High Power Factor Preregulator
UC2854NG4	TI	获取价格	High Power Factor Preregulator
UC2854Q	TI	获取价格	High Power Factor Preregulator
UC2854QTR	TI	获取价格	0.5A POWER FACTOR CONTROLLER, 200kHz SWITCHING FREQ-MAX, PQCC20, PLASTIC, LCC-20
UC2855A	TI	获取价格	High Performance Power Factor Preregulator
UC2855ADW	TI	获取价格	High Performance Power Factor Preregulator
UC2855ADWG4	TI	获取价格	High Performance Power Factor Preregulator
UC2855ADWTR	TI	获取价格	High Performance Power Factor Preregulator
UC2855ADWTRG4	TI	获取价格	1.5A POWER FACTOR CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO20, GREEN, PLASTIC, SOIC-20

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