전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

UC3843B 데이터시트(PDF) 1 Page - STMicroelectronics

부품명 UC3843B
상세설명  HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
Download  15 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UC3843B 데이터시트(HTML) 1 Page - STMicroelectronics

  UC3843B Datasheet HTML 1Page - STMicroelectronics UC3843B Datasheet HTML 2Page - STMicroelectronics UC3843B Datasheet HTML 3Page - STMicroelectronics UC3843B Datasheet HTML 4Page - STMicroelectronics UC3843B Datasheet HTML 5Page - STMicroelectronics UC3843B Datasheet HTML 6Page - STMicroelectronics UC3843B Datasheet HTML 7Page - STMicroelectronics UC3843B Datasheet HTML 8Page - STMicroelectronics UC3843B Datasheet HTML 9Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 1 / 15 page
background image
UC2842B/3B/4B/5B
UC3842B/3B/4B/5B
March 1999
HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
.
TRIMMED OSCILLATOR FOR PRECISE FRE-
QUENCY CONTROL
.
OSCILLATOR FREQUENCY GUARANTEED
AT 250kHz
.
CURRENT MODE OPERATION TO 500kHz
.
AUTOMATIC FEED FORWARD COMPENSA-
TION
.
LATCHING PWM FOR CYCLE-BY-CYCLE
CURRENT LIMITING
.
INTERNALLY TRIMMED REFERENCE WITH
UNDERVOLTAGE LOCKOUT
.
HIGH CURRENT TOTEM POLE OUTPUT
.
UNDERVOLTAGE LOCKOUT WITH HYSTER-
ESIS
.
LOW START-UP AND OPERATING CURRENT
DESCRIPTION
The UC384xB family of control ICs provides the nec-
essary features to implement off-line or DC to DC
fixed frequency current mode control schemes with
a minimal external parts count. Internally imple-
mented circuits include a trimmed oscillator for pre-
cise DUTY CYCLE CONTROL under voltage lock-
out featuring start-up current less than 0.5mA, a pre-
cision reference trimmed for accuracy at the error
amp input, logic to insure latched operation, a PWM
comparator which also provides current limit control,
and a totem pole output stage designed to source
or sink high peak current. The output stage, suitable
for driving N-Channel MOSFETs, is low in the off-
state.
Differences between members of this family are the
under-voltage lockout thresholds and maximum duty
cycle ranges. The UC3842B and UC3844B have
UVLO thresholds of 16V (on) and 10V (off), ideally
suited off-line applications The corresponding thresh-
olds for the UC3843B and UC3845B are 8.5 V and 7.9
V. The UC3842B and UC3843B can operate to duty
cycles approaching 100%. A range of the zero to <
50 % is obtained by the UC3844B and UC3845B by
the addition of an internal toggle flip flop which blanks
the output off every other clock cycle.
BLOCK DIAGRAM (toggle flip flop used only in UC3844B and UC3845B)
UVLO
S/R
5V
REF
34V
INTERNAL
BIAS
VREF GOOD
LOGIC
2.50V
T
S
R
OSC
R1V
CURRENT
SENSE
COMPARATOR
2R
+
-
PWM
LATCH
7
5
4
2
1
3
8
6
ERROR AMP.
Vi
GROUND
RT/CT
VFB
COMP
CURRENT
SENSE
VREF
5V 50mA
OUTPUT
D95IN331
Minidip
®
SO8
UC3842B
1/15


유사한 부품 번호 - UC3843B

제조업체부품명데이터시트상세설명
logo
ON Semiconductor
UC3843B ONSEMI-UC3843B Datasheet
295Kb / 20P
   HIGH PERFORMANCE CURRENT MODE CONTROLLERS
July, 2011 ??Rev. 15
logo
Guangdong Youtai Semico...
UC3843B UMW-UC3843B Datasheet
874Kb / 7P
   Low Start-Up and Operating Current
logo
STMicroelectronics
UC3843B STMICROELECTRONICS-UC3843B Datasheet
135Kb / 15P
   HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC3843B STMICROELECTRONICS-UC3843B Datasheet
135Kb / 15P
   HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
logo
Unisonic Technologies
UC3843B UTC-UC3843B Datasheet
185Kb / 7P
   HIGH PERFORMANCE CURRENT MODE CONTROLLERS
More results

유사한 설명 - UC3843B

제조업체부품명데이터시트상세설명
logo
STMicroelectronics
UC2842B STMICROELECTRONICS-UC2842B Datasheet
135Kb / 15P
   HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC3842B STMICROELECTRONICS-UC3842B Datasheet
135Kb / 15P
   HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC2842A STMICROELECTRONICS-UC2842A Datasheet
167Kb / 16P
   HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC3844BD1013TR STMICROELECTRONICS-UC3844BD1013TR Datasheet
239Kb / 15P
   HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC3845BD1013TR STMICROELECTRONICS-UC3845BD1013TR Datasheet
239Kb / 15P
   HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
E-UC3843BD1 STMICROELECTRONICS-E-UC3843BD1 Datasheet
239Kb / 15P
   HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
logo
Holtek Semiconductor In...
HT7A3942 HOLTEK-HT7A3942 Datasheet
1Mb / 11P
   High Performance Current Mode PWM Controller
logo
Semtech Corporation
SC4809A SEMTECH-SC4809A_16 Datasheet
321Kb / 16P
   High Performance Current Mode PWM Controller
logo
STMicroelectronics
UC3844T STMICROELECTRONICS-UC3844T Datasheet
228Kb / 15P
   HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
logo
Texas Instruments
TL2843B-Q1 TI-TL2843B-Q1_15 Datasheet
286Kb / 18P
[Old version datasheet]   HIGH-PERFORMANCE CURRENT-MODE PWM CONTROLLER
logo
List of Unclassifed Man...
M5576 ETC-M5576 Datasheet
686Kb / 10P
   High performance current mode PWM controller
V1.0
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15


데이터시트 다운로드

Go To PDF Page


링크 URL




개인정보취급방침
ALLDATASHEET.CO.KR
ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ] 

Alldatasheet는?   |   광고문의   |   운영자에게 연락하기   |   개인정보취급방침   |   링크교환   |   제조사별 검색
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com