UC2854BN

更新时间： 2024-11-01 22:35:47

品牌	Logo	应用领域
德州仪器 - TI		稳压器光电二极管
页数	文件大小	规格书
16页	452K
描述
ADVANCED HIGH-POWER FACTOR PREREGULATOR

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中文翻译

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数据手册
替代型号

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UC2854BN 数据手册

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SLUS329B − JUNE 1998 − REVISED FEBRUARY 2005

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FEATURES

DESCRIPTION

Controls Boost PWM to Near-Unity Power

Factor

The UC3854A/B products are pin compatible

enhanced 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.

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

A 1% 7.5 V reference, fixed frequency oscillator,

PWM, voltage amplifier with soft-start, line voltage

Offset (Eliminates External Resistor), 0 V

to 5 V Multout Common-Mode Range

V GOOD Comparator

REF

Faster and Improved Accuracy ENABLE

Comparator

feedforward (V

clamp, and over current comparator round out the

list of features.

squarer), input supply voltage

RMS

Available in the 16-pin N (PDIP), DW (SOIC-

Wide), and J (CDIP) and 20-pin Q (PLCC)

package. See ordering information on page 3 for

availability by temperature range.

UVLO Options (16 V/10 V or 10.5 V/10 V)

300-µA Start-Up Supply Current

BLOCK DIAGRAM

VAO

MOUT

CAO PKLMT

REF

7.5 V REF

(A) 16 V / 10 V

(B) 10.5 V / 10 V

RUN

ENA

7.1 V

POWER

2.65 V / 2.15 V

3 V

15 VCC

VSENSE

IAC

16 GTDRV

VRMS

RUN

14 µA

20 V

A B

I_MOUT

OSC

1 GND

UDG−03110

ISENSE

RSET

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www.ti.com

12 3 4 5 6 7...16

中文翻译

下载PDF

UC2854BN 替代型号

型号	品牌	替代类型	描述	数据表
UC3854AN	TI	类似代替	ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC2854AN	TI	类似代替	ADVANCED HIGH-POWER FACTOR PREREGULATOR

与UC2854BN相关器件

型号	品牌	获取价格	描述	数据表
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
UC2854DW	TI	获取价格	High Power Factor Preregulator
UC2854DWG4	TI	获取价格	High Power Factor Preregulator
UC2854DWTR	TI	获取价格	High Power Factor Preregulator
UC2854DWTRG4	TI	获取价格	High Power Factor Preregulator
UC2854J	TI	获取价格	High Power Factor Preregulator

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