UC1842A-EP

更新时间： 2024-11-04 22:41:51

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	427K
描述
CURRENT-MODE PWM CONTROLLER

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UC1842A-EP 数据手册

UC1842A-EP, UC1843A-EP, UC1844A-EP, UC1845A-EP

CURRENT-MODE PWM CONTROLLER

SGLS134B – SEPTEMBER 2002 – REVISED APRIL 2003

Controlled Baseline

– One Assembly/Test Site, One Fabrication

Site

Automatic Feed Forward Compensation

Pulse-by-Pulse Current Limiting

Enhanced Load Response Characteristics

Under-Voltage Lockout With Hysteresis

Double Pulse Suppression

Extended Temperature Performance of

–55°C to 125°C

Enhanced Diminishing Manufacturing

Sources (DMS) Support

High Current Totem Pole Output

Internally Trimmed Bandgap Reference

500 kHz Operation

Enhanced Product Change Notification

†

Qualification Pedigree

Low R Error Amp

Optimized for Off-line and DC to DC

Converters

D PACKAGE

(TOP VIEW)

Low Start Up Current (<0.5 mA)

Trimmed Oscillator Discharge Current

†

Component qualification in accordance with JEDEC and industry

standards to ensure reliable operation over an extended

temperature range. This includes, but is not limited to, Highly

Accelerated Stress Test (HAST) or biased 85/85, temperature

cycle, autoclave or unbiased HAST, electromigration, bond

intermetallic life, and mold compound life. Such qualification

testing should not be viewed as justifying use of this component

beyond specified performance and environmental limits.

COMP

REF

OUTPUT

GND

SENSE

R /C

description

The UC1842A/3A/4A/5A family of control ICs is a pin for pin compatible improved version of the UC3842/3/4/5

family. Providing the necessary features to control current mode switched mode power supplies, this family has

the following improved features. Start up current is guaranteed to be less than 0.5 mA. Oscillator discharge is

trimmed to 8.3 mA. During under voltage lockout, the output stage can sink at least 10 mA at less than 1.2 V

for V

over 5 V.

The difference between members of this family are shown in the table below.

PART NUMBER

UC1842A

UVLO ON

16 V

UVLO OFF

10 V

MAXIMUM DUTY CYCLE

<100%

<50%

UC1843A

8.5 V

7.9 V

UC1844A

16 V

10 V

UC1845A

8.5 V

7.9 V

<50%

‡

ORDERING INFORMATION

ORDERABLE

TOP-SIDE

MARKING

‡

PACKAGE

PART NUMBER

UC1842AMDREP

UC1843AMDREP

UC1844AMDREP

UC1845AMDREP

–55°C to 125°C

SOP – D

Tape and reel

1842AME

1843AME

1844AME

1845AME

‡

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 Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

12 3 4 5 6 7...11

中文翻译

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与UC1842A-EP相关器件

型号	品牌	获取价格	描述	数据表
UC1842AJ	TI	获取价格	Current Mode PWM Controller
UC1842AJ/883BC	TI	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, CDIP8
UC1842AJ883B	TI	获取价格	Current Mode PWM Controller
UC1842AJQMLV	TI	获取价格	Current Mode PWM Controller
UC1842AL	ETC	获取价格
UC1842AL/883B	ROCHESTER	获取价格	Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, CQCC20
UC1842AL/883BC	TI	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, CQCC20
UC1842AL883B	TI	获取价格	Current Mode PWM Controller
UC1842ALQMLV	TI	获取价格	Current Mode PWM Controller
UC1842AMDREP	TI	获取价格	CURRENT-MODE PWM CONTROLLER

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