전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

Preview PDF HTML

SC411 데이터시트(PDF) 16 Page - Semtech Corporation

부품명 SC411
상세설명  Synchronous Buck Pseudo-Fixed Frequency Power Supply Controller
PDF  27 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  SEMTECH [Semtech Corporation]
홈페이지  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC411 데이터시트(HTML) 16 Page - Semtech Corporation

Back Button SC411 Datasheet HTML 12Page - Semtech Corporation SC411 Datasheet HTML 13Page - Semtech Corporation SC411 Datasheet HTML 14Page - Semtech Corporation SC411 Datasheet HTML 15Page - Semtech Corporation SC411 Datasheet HTML 16Page - Semtech Corporation SC411 Datasheet HTML 17Page - Semtech Corporation SC411 Datasheet HTML 18Page - Semtech Corporation SC411 Datasheet HTML 19Page - Semtech Corporation SC411 Datasheet HTML 20Page - Semtech Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 16 / 27 page
background image
16
© 2007 Semtech Corp.
www.semtech.com
SC411
POWER MANAGEMENT
Application Information (Cont.)
I
VDDP
= gate drive operating current (A)
V
g
= gate drive voltage, typically 5V (V)
Q
g
= FET gate charge, from the FET datasheet (C)
f
= switching frequency (kHz)
VBST = boost pin voltage during t
ON (V)
D
= duty cycle
Inserting the following values for VBAT
(MIN) condition (since
this is the worst case condition for power dissipation in
the controller) as an example (VOUT = 1.2V),
T
A
= 85°C
θ
JA
= 100°C/W
VCCA
= VDDP = 5V
I
VCCA
= 1100μA (data sheet maximum)
I
VDDP
= 150μA (data sheet maximum)
V
g
= 5V
Q
g
= 60nC
f
= 266kHz
VBAT
(MIN) = 8V
VBST
(MIN) = VBAT(MIN)+VDDP = 13V
D
(MIN)
= 1.2/8 = 0.15
gives us,
W
088
.
0
15
.
0
10
1
13
10
266
10
60
5
10
150
5
10
1100
5
P
3
3
9
6
6
D
=
•
•
•
+
•
•
•
•
+
•
•
+
•
•
=
−
−
−
−
and,
C
8
.
93
100
088
.
0
85
T
J
°
=
•
+
=
As can be seen, the heating effects due to internal power
dissipation are practically negligible, thus requiring no
special thermal consideration during layout.
The Reference Design is shown in Figure on Page 17.
An additional design optimized for efficiency and capable
of a higher load current of 10A is shown in Figure 11 on
Page 21.



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


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