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UC3854_V01中文资料

厂家型号

UC3854_V01

文件大小

309.42Kbytes

页面数量

6

功能描述

ENHANCED HIGH POWER FACTOR PREREGULATOR

数据手册

下载地址一下载地址二到原厂下载

简称

UTC友顺

生产厂商

Unisonic Technologies

中文名称

友顺科技股份有限公司官网

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UC3854_V01数据手册规格书PDF详情

DESCRIPTION

The UTC UC3854 provide all 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 that of AC input line voltage. Average current mode

control maintains stable, low distortion sinusoidal line current

without the need for slope compensation, unlike peak current mode

control.

Designed in UTC’s Bipolar process, the UTC UC3854 offers

new features such as 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 improved amplifier current sinking capability,

amplifier output clamps, 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, the maximum multiplier output

current is now clamped to a maximum of 2 * IAC at all times.

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.

 FEATURES

* Controls Boost Preregulator to Near Unity Power Factor

* Limits Line Distortion

* World-Wide Line Operation

* Accurate Power Limiting

* Fixed Frequency Average Current Mode Control

* High Bandwidth (5MHz), Low Offset Current Amplifier

* 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

* 300uA Startup Supply Current

更新时间:2025-7-23 14:03:00
供应商 型号 品牌 批号 封装 库存 备注 价格
UC
23+
DIP
1200
特价库存
UC
2023+
DIP
50000
原装现货
ON
24+
SOP-14
20000
全新原厂原装,进口正品现货,正规渠道可含税!!
TI
24+
DIP16
7800
进口原装假一赔百,现货热卖
TI德州仪器
22+
24000
原装正品现货,实单可谈,量大价优
TI(德州仪器)
23+
N/A
6000
公司只做原装,可来电咨询
TI(德州仪器)
24+
N/A
20000
原装进口正品
TI(德州仪器)
24+
N/A
6000
原厂原装现货订货价格优势终端BOM表可配单提供样品
TI(德州仪器)
2021/2022+
N/A
6000
原厂原装现货订货价格优势终端BOM表可配单提供样品
TI(德州仪器)
24+
N/A
20000
现货

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Unisonic Technologies 友顺科技股份有限公司

中文资料: 44005条

UTC集团成立于1990年,专注致力于模拟IC及离散式组件Discrete 研发、设计、制造、封装、测试及营销业务。 为提供客户完整的解决方案及具价格竞争优势,公司经营策略采IDM资源垂直整合,期望能给予客户最佳选择,并创造客户最大之经济效益。 IDM采取主动的方式,从产品的研发、设计、制造、封装、测试到品牌营销, 在每一个关键点都充分掌握其自主的能力,以达到产能保障及技术自主,充分展现企业竞争力。 UTC具有完整模拟组件产品线,产品以类比IC为主(涵盖电源管理、电源驱动、运算放大器、比较器、数字功放、 逻辑IC等), 分立器件为主(涵盖低压MOS管 、高压MOS管、超结MOS、IGBT单