UC1854A

更新时间： 2024-11-23 12:01:51

品牌	Logo	应用领域
德州仪器 - TI		稳压器
页数	文件大小	规格书
18页	741K
描述
ADVANCED HIGH-POWER FACTOR PREREGULATOR

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替代型号

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UC1854A 数据手册

UC1854A

UC2854A, UC2854B

UC3854A, UC3854B

www.ti.com

SLUS329E–MONTH 2003–REVISED JANUARY 2008

ADVANCED HIGH-POWER FACTOR PREREGULATOR

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 V_AC

Offset (Eliminates External Resistor), 0 V to

5 V Multout Common-Mode Range

A 1%, 7.5-V reference, fixed frequency oscillator,

PWM, voltage amplifierwith soft-start, line voltage

feedforward (V_RMSsquarer), input supply voltage

clamp, and over current comparator round out the lilst

of feataures.

•

V_REFGOOD Comparator

Faster and Improved Accuracy ENABLE

Comparator

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

and J (CDIP) and 20-pin Q (PLCC) package. See

Ordering Information table 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

OSC

GND

MOUT

ISENSE

RSET

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...18

中文翻译

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UC1854A 替代型号

型号	品牌	替代类型	描述	数据表
UC1854B	TI	功能相似	ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC3854A	TI	功能相似	Enhanced High Power Factor Preregulator
UC2854A	TI	功能相似	Enhanced High Power Factor Preregulator

与UC1854A相关器件

型号	品牌	获取价格	描述	数据表
UC1854A_13	TI	获取价格	ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC1854A_15	TI	获取价格	ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC1854ADWTR	TI	获取价格	暂无描述
UC1854AJ	ROCHESTER	获取价格	1.5 A POWER FACTOR CONTROLLER, 200 kHz SWITCHING FREQ-MAX, CDIP16
UC1854AL	TI	获取价格	1.5A POWER FACTOR CONTROLLER, 200kHz SWITCHING FREQ-MAX, CQCC20
UC1854AL883B	TI	获取价格	1.5A POWER FACTOR CONTROLLER, CQCC20, CERAMIC, LCC-20
UC1854B	TI	获取价格	ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC1854BDW	TI	获取价格	1.5A POWER FACTOR CONTROLLER, 200kHz SWITCHING FREQ-MAX, PDSO16, PLASTIC, SOIC-16
UC1854BJ	TI	获取价格	ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC1854BJ883B	TI	获取价格	ADVANCED HIGH-POWER FACTOR PREREGULATOR

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