công cụ tìm kiếm bảng dữ liệu linh kiện điện tử
  Vietnamese  ▼
ALLDATASHEET.VN

X  

Preview PDF HTML

AN4376 bảng dữ liệu(PDF) 23 Page - STMicroelectronics

tên linh kiện AN4376
Giải thích chi tiết về linh kiện  10 W wide range non-isolated high power factor LED driver using HVLED815PF
PDF  37 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4376 bảng dữ liệu(HTML) 23 Page - STMicroelectronics

Back Button AN4376 Datasheet HTML 19Page - STMicroelectronics AN4376 Datasheet HTML 20Page - STMicroelectronics AN4376 Datasheet HTML 21Page - STMicroelectronics AN4376 Datasheet HTML 22Page - STMicroelectronics AN4376 Datasheet HTML 23Page - STMicroelectronics AN4376 Datasheet HTML 24Page - STMicroelectronics AN4376 Datasheet HTML 25Page - STMicroelectronics AN4376 Datasheet HTML 26Page - STMicroelectronics AN4376 Datasheet HTML 27Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 23 / 37 page
background image
DocID025380 Rev 1
23/37
AN4376
PFC waveforms
37
7
PFC waveforms
7.1
Input and output LED driver waveforms
The waveforms of the input current and drain voltage at the nominal input voltage mains and
nominal LED load are illustrated in this section. Drain voltage is modulated by the sinusoidal
shape of the input mains voltage and the peak increase with the line.
The input current is in phase with the input voltage and a high power factor is achieved
(PF > 0.9).
Also the LED current and output voltage have been checked.
Note that the regulated LED current remains constant all over the input mains voltage. The
LED pk-pk ripple is the ± 27% of the average current. Increasing the value of the output
capacitor it is possible to decrease the LED current ripple following (Equation 2 on page 9).
For this demonstration board 3 parallel capacitors of 68
F have been selected to have
a current ripple of less than 100 mA pk-pk with 23 LEDs each with a dynamic resistance
of 0.8
.
Figure 20. Input and output PFC waveforms
at 100 VAC - 50 Hz - PF = 0.9889
Figure 21. Input and output PFC waveforms
at 230 VAC - 50 Hz - PF = 0.9211
CH1: DRAIN
CH2: INPUT PFC CURRENT
CH3: VOUT
CH4: LED CURRENT
CH1: DRAIN
CH2: INPUT PFC CURRENT
CH3: VOUT
CH4: LED CURRENT



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


bảng dữ liệu tải về

Go To PDF Page


Link URL



Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không?  [ DONATE ] 

Alldatasheet là   |   Quảng cáo   |   Liên lạc với chúng tôi   |   Chính sách bảo mật   |   Liên kết đến bảng dữ liệu    |   Trao đổi link   |   Tìm kiếm theo nhà sản xuất
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