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

X  

Preview PDF HTML

L6983IQTR bảng dữ liệu(PDF) 13 Page - STMicroelectronics

tên linh kiện L6983IQTR
Giải thích chi tiết về linh kiện  38 V, 10 W synchronous iso-buck converter for isolated applications
PDF  56 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6983IQTR bảng dữ liệu(HTML) 13 Page - STMicroelectronics

Back Button L6983IQTR Datasheet HTML 9Page - STMicroelectronics L6983IQTR Datasheet HTML 10Page - STMicroelectronics L6983IQTR Datasheet HTML 11Page - STMicroelectronics L6983IQTR Datasheet HTML 12Page - STMicroelectronics L6983IQTR Datasheet HTML 13Page - STMicroelectronics L6983IQTR Datasheet HTML 14Page - STMicroelectronics L6983IQTR Datasheet HTML 15Page - STMicroelectronics L6983IQTR Datasheet HTML 16Page - STMicroelectronics L6983IQTR Datasheet HTML 17Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 13 / 56 page
background image
5.1.4
Minimum on-time
The current sense in the high-side MOSFET is not active (masked) for a certain time at the beginning to the
on-time (masking time, from which the parameter TON MIN derives).
This current sense blanking time is implemented to prevent any primary side pulsed current at the high-side
turn-on (resonating with transformer leakage inductance, parasitic capacitances, reverse junction capacitance of
the Schottky diode of the secondary side) from overcoming the EA programmed switch current for the conversion,
which would make the conversion unstable (depicted in Figure 9). For the L6983I, the TON MIN has a typical value
of 390 ns.
Figure 9. Simulation with different masking times: insufficient (< 100 ns, left) and appropriate (390 ns,
right)
-5
-4
-3
-2
-1
0
1
2
3
4
0
10
20
30
40
50
Time [µs]
-5
0
5
10
15
20
0
10
20
30
40
50
Time [µs]
-5
-4
-3
-2
-1
0
1
2
3
4
0
10
20
30
40
50
Time [µs]
-5
0
5
10
15
20
0
10
20
30
40
50
Time [µs]
Despite the masking time, an RC snubber (for example, across the Schottky diode of the secondary side) is
normally recommended to damp oscillations. Figure 10 shows how the RC snubber helps in smothering the
remaining oscillations.
Figure 10. Remaining oscillations (left) and their filtering with RC snubber (right) VIN = 12 V, N = 6, IOUTiso
= 200 mA
L6983I
Primary side
DS14040 - Rev 1
page 13/56



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 46 47 48 49 50 51 52 53 54 55 56


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