Datasheet > UC3854BNG4

UC3854BNG4

更新时间： 2024-11-02 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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UC3854BNG4 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

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UC3854BNG4 替代型号

型号	品牌	替代类型	描述	数据表
UC3854BN	TI	完全替代	ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC3854AN	TI	类似代替	ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC2854BN	TI	类似代替	ADVANCED HIGH-POWER FACTOR PREREGULATOR

与UC3854BNG4相关器件

型号	品牌	获取价格	描述	数据表
UC3854BQ	TI	获取价格	ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC3854BQTR	TI	获取价格	Power Factor Controller
UC3854DW	TI	获取价格	High Power Factor Preregulator
UC3854DWG4	TI	获取价格	High Power Factor Preregulator
UC3854DWTR	TI	获取价格	High Power Factor Preregulator
UC3854DWTR-FG4	TI	获取价格	High Power Factor Preregulator
UC3854DWTRG4	TI	获取价格	High Power Factor Preregulator
UC3854J	TI	获取价格	High Power Factor Preregulator
UC3854L	TI	获取价格	High Power Factor Preregulator
UC3854N	TI	获取价格	High Power Factor Preregulator

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