900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






etcTI

UC1844A-EP Datasheet Preview

UC1844A-EP Datasheet

Current-Mode PWM Controllers

No Preview Available !

UC1842A-EP, UC1843A-EP, UC1844A-EP, UC1845A-EP
CURRENT-MODE PWM CONTROLLER
D Controlled Baseline
One Assembly/Test Site, One Fabrication
Site
D Extended Temperature Performance of
55°C to 125°C
D Enhanced Diminishing Manufacturing
Sources (DMS) Support
D Enhanced Product Change Notification
D Qualification Pedigree
D Optimized for Off-line and DC-to-DC
Converters
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.
SGLS134D SEPTEMBER 2002 REVISED JANUARY 2013
D Automatic Feed Forward Compensation
D Pulse-by-Pulse Current Limiting
D Enhanced Load Response Characteristics
D Under-Voltage Lockout With Hysteresis
D Double Pulse Suppression
D High Current Totem Pole Output
D Internally Trimmed Bandgap Reference
D 500 kHz Operation
D Low RO Error Amp
D PACKAGE
(TOP VIEW)
COMP
VFB
ISENSE
RT/CT
1
2
3
4
8 VREF
7 VCC
6 OUTPUT
5 GND
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 VCC over 5 V.
The difference between members of this family are shown in the table below.
PART NUMBER
UC1842A
UC1843A
UC1844A
UC1845A
UVLO ON
16 V
8.5 V
16 V
8.5 V
UVLO OFF
10 V
7.9 V
10 V
7.9 V
MAXIMUM DUTY CYCLE
<100%
<100%
<50%
<50%
ORDERING INFORMATION
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
55°C to 125°C
SOP D
Tape and reel UC1842AMDREP
1842AME
55°C to 125°C
SOP D
Tape and reel UC1843AMDREP
1843AME
55°C to 125°C
SOP D
Tape and reel UC1844AMDREP
1844AME
55°C to 125°C
SOP D
Tape and reel UC1845AMDREP
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
Copyright © 2006, Texas Instruments Incorporated
1




etcTI

UC1844A-EP Datasheet Preview

UC1844A-EP Datasheet

Current-Mode PWM Controllers

No Preview Available !

UC1842A-EP, UC1843A-EP, UC1844A-EP, UC1845A-EP
CURRENT-MODE PWM CONTROLLER
SGLS134D SEPTEMBER 2002 REVISED JANUARY 2013
block diagram
NOTES: 1. Toggle flip flop used only in 1844A and 1845A.
Ordering Information
UC 184 4 A M D R EP
ENHANCED PLASTIC INDICATOR
TAPE and REEL INDICATOR
PACKAGE
D = Plastic SOIC
MILITARY TEMPERATURE RANGE INDICATOR
IMPROVED PERFORMANCE INDICATOR
PRODUCT OPTION
2 through 5
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number UC1844A-EP
Description Current-Mode PWM Controllers
Maker etcTI
PDF Download

UC1844A-EP Datasheet PDF






Similar Datasheet

1 UC1844A-EP Current-Mode PWM Controllers
etcTI





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy