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

X  

Preview PDF HTML

AN2982 bảng dữ liệu(PDF) 21 Page - STMicroelectronics

tên linh kiện AN2982
Giải thích chi tiết về linh kiện  This application note describes the STEVAL-ILB005V2 demonstration board equipped with the L6585DE lighting controller
PDF  31 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2982 bảng dữ liệu(HTML) 21 Page - STMicroelectronics

Back Button AN2982 Datasheet HTML 17Page - STMicroelectronics AN2982 Datasheet HTML 18Page - STMicroelectronics AN2982 Datasheet HTML 19Page - STMicroelectronics AN2982 Datasheet HTML 20Page - STMicroelectronics AN2982 Datasheet HTML 21Page - STMicroelectronics AN2982 Datasheet HTML 22Page - STMicroelectronics AN2982 Datasheet HTML 23Page - STMicroelectronics AN2982 Datasheet HTML 24Page - STMicroelectronics AN2982 Datasheet HTML 25Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 21 / 31 page
background image
AN2982
Ballast stage design
Doc ID 15599 Rev 1
21/31
2.5
IC power supply design
The IC current consumption depends on both the PFC frequency and half-bridge frequency.
In the worst case, the mean value of the PFC frequency is equal to 162 kHz and the
maximum half-bridge frequency is equal to 90 kHz.
With these values the maximum supply current is approximately equal to:
Equation 53
This current is delivered to the IC by means of a charge pump connected to the middle point
of the half bridge.
Figure 14.
Charge pump network and startup
The current delivered by the charge pump capacitor is approximately:
Equation 54
where:
Equation 55
and rearranging the terms:
Equation 56
The startup network works also as a detector of lamp presence. This feature can be
implemented by placing one or both of the lamp cathodes along the startup network path. If
the lamp is absent, the IC cannot start.
mA
11
56
.
4
f
0373
.
0
f
0192
.
0
I
kHz
mA
pre
kHz
PFC
cc
≈
+
+
⋅
=
cc
run
rise
pk
,
cp
cp
I
f
T
I
I
≥
⋅
⋅
=
rise
out
cp
pk
,
cp
T
V
C
I
=
→
=
⋅
≥
pF
558
f
V
I
C
run
OUT
cp
cp
C
cp
1nF
=



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


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