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UC3854_V01中文资料
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
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 |
UC3854_V01 资料下载更多...
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Datasheet数据表PDF页码索引
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Unisonic Technologies 友顺科技股份有限公司
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