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UC1842A

更新时间： 2024-11-03 22:41:51
品牌 Logo 应用领域
德州仪器 - TI 模拟IC信号电路开关控制器
页数 文件大小 规格书
11页 427K
描述
CURRENT-MODE PWM CONTROLLER

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UC1842A 技术参数

生命周期：ObsoleteReach Compliance Code：unknown
风险等级：5.56Is Samacsys：N
Base Number Matches：1

UC1842A 数据手册

 浏览型号UC1842A的Datasheet PDF文件第2页浏览型号UC1842A的Datasheet PDF文件第3页浏览型号UC1842A的Datasheet PDF文件第4页浏览型号UC1842A的Datasheet PDF文件第5页浏览型号UC1842A的Datasheet PDF文件第6页浏览型号UC1842A的Datasheet PDF文件第7页 
UC1842A-EP, UC1843A-EP, UC1844A-EP, UC1845A-EP  
CURRENT-MODE PWM CONTROLLER  
SGLS134B – SEPTEMBER 2002 – REVISED APRIL 2003  
D
Controlled Baseline  
– One Assembly/Test Site, One Fabrication  
Site  
D
D
D
D
D
D
D
D
D
Automatic Feed Forward Compensation  
Pulse-by-Pulse Current Limiting  
Enhanced Load Response Characteristics  
Under-Voltage Lockout With Hysteresis  
Double Pulse Suppression  
D
D
D
D
D
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  
O
Optimized for Off-line and DC to DC  
Converters  
D PACKAGE  
(TOP VIEW)  
D
Low Start Up Current (<0.5 mA)  
D
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  
V
V
1
2
3
4
8
7
6
5
REF  
CC  
V
FB  
I
OUTPUT  
GND  
SENSE  
R /C  
T
T
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.  
CC  
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%  
<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  
T
A
PART NUMBER  
UC1842AMDREP  
UC1843AMDREP  
UC1844AMDREP  
UC1845AMDREP  
–55°C to 125°C  
–55°C to 125°C  
–55°C to 125°C  
–55°C to 125°C  
SOP – D  
SOP – D  
SOP – D  
SOP – D  
Tape and reel  
Tape and reel  
Tape and reel  
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.  
Copyright 2002 – 2003, Texas Instruments Incorporated  
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.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...11

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