Datasheet > UC2843A-Q1

UC2843A-Q1

更新时间： 2024-11-23 12:22:31

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
11页	268K
描述
CURRENT-MODE PWM CONTROLLER

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UC2843A-Q1 数据手册

UC2843A-Q1

www.ti.com........................................................................................................................................................................................................ SGLS384–MAY 2008

CURRENT-MODE PWM CONTROLLER

FEATURES

D PACKAGE

(TOP VIEW)

•

Qualified for Automotive Applications

•

Extended Temperature Performance of

–40°C to 125°C

COMP

V_FB

V_REF

V_CC

•

Optimized for Off-Line and DC-to-DC

Converters

I_SENSE

R_T/C_T

OUTPUT

GND

•

Low Start-Up Current (<0.5 mA)

Trimmed Oscillator-Discharge Current

Automatic Feed-Forward Compensation

Pulse-by-Pulse Current Limiting

Enhanced Load-Response Characteristics

Under-Voltage Lockout With Hysteresis

Double-Pulse Suppression

High-Current Totem-Pole Output

Internally Trimmed Bandgap Reference

500-kHz Operation

Low R_OError Amp

DESCRIPTION/ORDERING INFORMATION

The UC2843A control IC is a pin-for-pin compatible improved version of the UC2843. Providing the necessary

features to control current mode switched mode power supplies, this device has the following improved features.

Start up current is specified to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During

undervoltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for V_CCover 5 V.

MAXIMUM DUTY

PART NUMBER

UVLO ON

UVLO OFF

CYCLE

UC2843A

8.5 V

7.9 V

<100%

ORDERING INFORMATION⁽¹⁾

T_A

PACKAGE⁽²⁾

ORDERABLE PART NUMBER

UC2843AQD8RQ1

TOP-SIDE MARKING

–40°C to 125°C

SOIC-8 – D8

Reel of 2500

UC2843AQ

(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

web site at www.ti.com.

(2) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

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...11

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与UC2843A-Q1相关器件

型号	品牌	获取价格	描述	数据表
UC2843AQD	TI	获取价格	CURRENT-MODE PWM CONTROLLER
UC2843AQD8	TI	获取价格	CURRENT-MODE PWM CONTROLLER
UC2843AQD8R	TI	获取价格	CURRENT-MODE PWM CONTROLLER
UC2843AQD8RG4	TI	获取价格	Automotive Catalog Current-Mode PWM Controller 8-SOIC -40 to 125
UC2843AQD8RG4Q1	TI	获取价格	CURRENT-MODE PWM CONTROLLER
UC2843AQD8RQ1	TI	获取价格	CURRENT-MODE PWM CONTROLLER
UC2843AQDR	TI	获取价格	CURRENT-MODE PWM CONTROLLER
UC2843AQG3	TI	获取价格	Current Mode PWM Controller
UC2843AQTR	TI	获取价格	Current-Mode SMPS Controller
UC2843AY	MICROSEMI	获取价格	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP8, CERAMIC

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