UC2854BL

更新时间： 2024-11-22 23:38:55

品牌	Logo	应用领域
德州仪器 - TI		模拟IC
页数	文件大小	规格书
7页	190K
描述
Analog IC

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

UC2854BL 数据手册

UC1854A/B

UC2854A/B

UC3854A/B

Enhanced High Power Factor Preregulator

FEATURES

DESCRIPTION

•

Controls Boost PWM to Near Unity

The UC1854A/B products are pin compatible enhanced versions of the

UC1854. Like the UC1854, 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 UC1854A/B uses average current mode control. Average current

mode control maintains stable, low distortion sinusoidal line current

Power Factor

•

Limits Line Current Distortion To <3%

World-Wide Operation Without Switches

Accurate Power Limiting

Fixed Frequency Average Current Mode without the need for slope compensation, unlike peak current mode

Control

control.

•

High Bandwidth (5MHz), Low Offset

Current Amplifier

The UC1854A/B products improve upon the UC1854 by offering a wide

bandwidth, low offset Current Amplifier, a faster responding and

improved accuracy enable comparator, a VREF "good" comparator,

UVLO threshold options (16/10V for offline, 10.5/10V for startup from

an auxiliary 12V regulator), lower startup supply current, and an

enhanced multiply/divide circuit. New features like the amplifier output

clamps, improved amplifier current sinking capability, and low offset

VAC pin reduce the external component count while improving

performance. Improved common mode input range of the Multiplier

output/Current Amp input allow the designer greater flexibility in

choosing a method for current sensing. Unlike its predecessor, RSET

controls only oscillator charging current and has no effect on clamping

the maximum multiplier output current. This current is now clamped to

Integrated Current and Voltage Amp

Output Clamps

Multiplier Improvements: Linearity,

500mV VAC Offset (eliminates external

resistor), 0-5V Multout Common Mode

Range

•

VREF "GOOD" Comparator

Faster and Improved Accuracy ENABLE

Comparator

a maximum of 2 IAC at all times which simplifies the design process

and provides foldback power limiting during brownout and extreme low

line conditions.

•

UVLO Threshold Options

(16/10V / 10.5/10V)

300µA Startup Supply Current

A 1% 7.5V reference, fixed frequency oscillator, PWM, Voltage

Amplifier with softstart, line voltage feedforward (VRMS squarer), input

supply voltage clamp, and over current comparator round out the list of

features.

UVLO Turn on UVLO Turn off

UC1854A

UC1854B

16V

10V

10.5V

BLOCK DIAGRAM

UDG-93001-1

6/98

12 3 4 5 6 7

中文翻译

下载PDF

与UC2854BL相关器件

型号	品牌	获取价格	描述	数据表
UC2854BM	TI	获取价格	High Power Factor Preregulator
UC2854BMDWREP	TI	获取价格	增强型产品高级高功率因数前置稳压器 \| DW \| 16 \| -55 to 125
UC2854BMDWREPG4	TI	获取价格	增强型产品高级高功率因数前置稳压器 \| DW \| 16 \| -55 to 125
UC2854BN	ROCHESTER	获取价格	1.5 A POWER FACTOR CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDIP16
UC2854BN	TI	获取价格	ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC2854BNG4	TI	获取价格	ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC2854BQ	TI	获取价格	ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC2854BQ	ROCHESTER	获取价格	1.5 A POWER FACTOR CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PQCC20
UC2854BQG3	TI	获取价格	ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC2854BQTR	TI	获取价格	Power Factor Controller

与UC2854BL相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

36
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

28
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

56
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

53

产品中心

服务支持

精选活动

关于我们

帮助中心

UC2854BL

UC2854BL 数据手册

与UC2854BL相关器件

与UC2854BL相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

UC2854BL

UC2854BL 数据手册

与UC2854BL相关器件

与UC2854BL相关文章

您还可以找

您在本页遇到什么问题？