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

X  

Preview PDF HTML

HVLED815PF bảng dữ liệu(PDF) 24 Page - STMicroelectronics

tên linh kiện HVLED815PF
Giải thích chi tiết về linh kiện  Offline LED driver with primary-sensing and high power factor up to 15 W
PDF  36 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

HVLED815PF bảng dữ liệu(HTML) 24 Page - STMicroelectronics

Back Button HVLED815PF Datasheet HTML 20Page - STMicroelectronics HVLED815PF Datasheet HTML 21Page - STMicroelectronics HVLED815PF Datasheet HTML 22Page - STMicroelectronics HVLED815PF Datasheet HTML 23Page - STMicroelectronics HVLED815PF Datasheet HTML 24Page - STMicroelectronics HVLED815PF Datasheet HTML 25Page - STMicroelectronics HVLED815PF Datasheet HTML 26Page - STMicroelectronics HVLED815PF Datasheet HTML 27Page - STMicroelectronics HVLED815PF Datasheet HTML 28Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 24 / 36 page
background image
Device description
HVLED815PF
24/36
Doc ID 023409 Rev 4
Figure 19.
Feed-forward compensation: internal schematic
During MOSFET's ON-time the current sourced from DMG pin is mirrored inside the "Feed-
forward Logic" block in order to provide a feed-forward current, IFF.
Such "feed-forward current" is proportional to the input voltage according to the formula:
Equation 9
Where m is the primary-to-auxiliary turns ratio.
According to the schematic, the voltage on the non-inverting comparator will be:
Equation 10
The offset introduced by feed-forward compensation will be:
Equation 11
As RFF>>RSENSE, the previous one can be simplified as:
Equation 12
This offset is proportional to VIN and it is used to compensate the current overshoot,
according to the following formula:
AM13569v1
CS
.
IFF
Feedforward
Logic
CC
Rff
Rsense
PWM
LOGIC
DMG
CC
Block
Aux
Rfb
Rdmg
SOURCE
DRAIN



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


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