전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

Preview PDF HTML

UM0670 데이터시트(PDF) 33 Page - STMicroelectronics

부품명 UM0670
상세설명  80 W offline LED driver with PFC
PDF  43 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM0670 데이터시트(HTML) 33 Page - STMicroelectronics

Back Button UM0670 Datasheet HTML 29Page - STMicroelectronics UM0670 Datasheet HTML 30Page - STMicroelectronics UM0670 Datasheet HTML 31Page - STMicroelectronics UM0670 Datasheet HTML 32Page - STMicroelectronics UM0670 Datasheet HTML 33Page - STMicroelectronics UM0670 Datasheet HTML 34Page - STMicroelectronics UM0670 Datasheet HTML 35Page - STMicroelectronics UM0670 Datasheet HTML 36Page - STMicroelectronics UM0670 Datasheet HTML 37Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 33 / 43 page
background image
Design features
UM0670
33/43
Doc ID 15327 Rev 2
Figure 40.
Proper startup using diode D104 and capacitor C110
Figure 41.
Improper startup without using diode D104 and capacitor C110
10.2
Zero dimming design implementation
During zero dimming (duty cycle is 0%) the high PF boost converter is in burst mode
because there is zero load. During this mode, capacitors C107 and C110 are charged only
in short pulses (C107 is also slightly charged via resistor from the input voltage, but it is not
enough) and therefore do not have enough energy to also supply the PWM generator and
the second L6562A controller used for the modified buck converter. The circuit shown in
Figure 42 allows brightness changes down to 0% without any problem, because if the



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


데이터시트 다운로드

Go To PDF Page


링크 URL



ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ] 

Alldatasheet는?   |   광고문의   |   운영자에게 연락하기   |   개인정보취급방침   |   링크 투 데이터시트    |   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