전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

UC3843ADG4 데이터시트(PDF) 10 Page - Texas Instruments

Click here to check the latest version.
부품명 UC3843ADG4
상세설명  Current-Mode PWM Controller
Download  45 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI1 - Texas Instruments

UC3843ADG4 데이터시트(HTML) 10 Page - Texas Instruments

Back Button UC3843ADG4 Datasheet HTML 6Page - Texas Instruments UC3843ADG4 Datasheet HTML 7Page - Texas Instruments UC3843ADG4 Datasheet HTML 8Page - Texas Instruments UC3843ADG4 Datasheet HTML 9Page - Texas Instruments UC3843ADG4 Datasheet HTML 10Page - Texas Instruments UC3843ADG4 Datasheet HTML 11Page - Texas Instruments UC3843ADG4 Datasheet HTML 12Page - Texas Instruments UC3843ADG4 Datasheet HTML 13Page - Texas Instruments UC3843ADG4 Datasheet HTML 14Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 45 page
background image
10
UC1842A, UC1843A, UC1844A, UC1845A
UC2842A, UC2843A, UC2844A, UC2845A
UC3842A, UC3843A, UC3844A, UC3845A
SLUS224E – SEPTEMBER 1994 – REVISED JULY 2016
www.ti.com
Product Folder Links: UC1842A UC1843A UC1844A UC1845A UC2842A UC2843A UC2844A UC2845A UC3842A
UC3843A UC3844A UC3845A
Submit Documentation Feedback
Copyright © 1994–2016, Texas Instruments Incorporated
Feature Description (continued)
Figure 3. Current Sense Circuit Diagram
8.3.3 Error Amplifier Configuration
The error amplifier can source up to 0.8 mA, and sink up to 6 mA.
Figure 4. Error Amplifier Configuration Diagram
8.3.4 Undervoltage Lockout
The UCx84xA devices feature undervoltage lockout protection circuits for controlled operation during power-up
and power-down sequences. Undervoltage lockout thresholds for the UCx842A, UCx843A, UCx844A, and
UCx845A devices are optimized for two groups of applications: off-line power supplies and DC-DC converters.
With a wider VCCON to VCCOFF range, the UCx842A and UCx844A devices are ideally suited to off-line AC input
applications. The UCx843A and UCx845A controllers have a much narrower VCCON to VCCOFF hysteresis and
may be used in DC to DC applications where the input is considered regulated.
During UVLO the IC draws typically 0.3 mA of supply current. This VCC current is considerable less than the
UCx84x family and results in lower power drawn from the line. The reduced start-up current is of particular
concern in off-line supplies where the IC is powered-up from the high-voltage DC rail, then bootstrapped to an
auxiliary winding on the main transformer. Power is then dissipated in the start-up resistor which is sized by the
IC’s start-up current. Lowering this by 50% in the UCx84xA version family, as compared to the UCx84x family,
reduces the resistors power loss by the same percentage. Once crossing the turnon threshold the IC supply
current increases typically to about 11 mA, During undervoltage lockout, the UCx84xA series of devices prevent
the power MOSFET from parasitically turning on due to the Miller effect at power-up. This improved design to the
lower totem-pole transistor’s operation during undervoltage lockout allows the IC to sink higher currents, up to 10
mA, at saturation voltages as low as 0.7 V, compared to the UCx84x devices which would only sink up to 0.2 mA
under the same conditions.


유사한 부품 번호 - UC3843ADG4

제조업체부품명데이터시트상세설명
logo
Texas Instruments
UC3843ADG4 TI-UC3843ADG4 Datasheet
517Kb / 11P
[Old version datasheet]   Current Mode PWM Controller
UC3843ADG4 TI1-UC3843ADG4 Datasheet
3Mb / 29P
[Old version datasheet]   Current Mode PWM Controller
More results

유사한 설명 - UC3843ADG4

제조업체부품명데이터시트상세설명
logo
NXP Semiconductors
UC3842 PHILIPS-UC3842 Datasheet
74Kb / 8P
   Current-mode PWM controller
August 31, 1994
logo
Daewoo Semiconductor
DBL3842 DAEWOO-DBL3842 Datasheet
467Kb / 8P
   CURRENT MODE PWM CONTROLLER
logo
BCD Semiconductor Manuf...
AP384XC BCDSEMI-AP384XC Datasheet
176Kb / 13P
   CURRENT MODE PWM CONTROLLER
logo
Cystech Electonics Corp...
MC7731N6 CYSTEKEC-MC7731N6 Datasheet
363Kb / 10P
   Current Mode PWM Controller
logo
BCD Semiconductor Manuf...
AP3842C BCDSEMI-AP3842C Datasheet
359Kb / 14P
   CURRENT MODE PWM CONTROLLER
logo
Texas Instruments
UC1846AJ TI-UC1846AJ Datasheet
3Mb / 13P
[Old version datasheet]   Current Mode PWM Controller
UC3844Q TI1-UC3844Q Datasheet
708Kb / 28P
[Old version datasheet]   CURRENT MODE PWM CONTROLLER
UC1843 TI-UC1843 Datasheet
937Kb / 3P
[Old version datasheet]   Current Mode PWM Controller
UC2846J TI-UC2846J Datasheet
463Kb / 8P
[Old version datasheet]   Current Mode PWM Controller
logo
List of Unclassifed Man...
AMC3842B ETC-AMC3842B Datasheet
365Kb / 10P
   CURRENT MODE PWM CONTROLLER
CM3842 ETC-CM3842 Datasheet
638Kb / 12P
   CURRENT MODE PWM CONTROLLER
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45


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