SMT POWER INDUCTORS
Shielded Toroid Series - Ros1/Ros2 Series
Notes:
1. Temperature rise is 55°C in typical buck or boost circuits with the rated I
DC
current and reference ET applied to the inductor.
2. Total loss in the inductor is 80 mW (ROS 1) and 280 mW (ROS 2) for 55°C
temperature rise above ambient.
3. To estimate temperature rise in a given application, you must determine the
total losses (copper losses + core losses) and apply the following formula:
Temp Rise (C) = (Total Losses (mW))
.833
* KO (from table)
4. To determine copper losses, calculate:
Copper Loss (mW) = I
DC2
x DCR
5. For core loss in mWatts, using frequency f (in Hz) and operating
flux density B (in Gauss), calculate:
Core Loss (mW) = k2 * f
1.26
* B
2.11
6. For flux density (B), calculate ET (V-µsec) for the application,
and multiply by ET
10
factor from the table.
Mechanical
A
G
F
MAX
Schematic
MAX
1
2
B
E
F
Suggested Pad Layout
C
D
PKG
ROS 1
ROS 2
A
.335
8,51
.545
13,84
B
.225
5,72
.390
9,91
C
.125
3,18
.215
5,46
D
.250
6,35
.440
11,18
E
.100
2,54
.120
3,05
F
.050
1,27
.065
1,65
G
.250
6,35
.440
11,18
ROS 1
ROS 2
Weight
....................0.29 grams .............1.1 grams
Tape & Reel
...............2000/reel ................600/reel
Dimensions:
Inches
mm
Unless otherwise specified, all tolerances are ± .010
0,25
ROS 1
.135
3,43
.012
0,30
.157
4,00 .079
2,00
.069
1,75
.295
7,49 .630
± .012
16,00
± 0,30
.220
5,59
.016
0,41
ROS 2
.157
4,00
.079
2,00
.069
1,75
.453
11,51
.050
1,27
.230
5,84
.315
8,00
.945
± .012
24,00
± 0,30
TAPE & REEL LAYOUT
USER DIRECTION OF FEED
TAPE & REEL LAYOUT
.410
10,41
.630
16,00
USER DIRECTION OF FEED
For More Information:
Pulse Worldwide
Headquarters
12220 World Trade Drive
San Diego, CA 92128
U.S.A.
www.pulseeng.com
TEL: 858 674 8100
FAX: 858 674 8262
Pulse
Northern Europe
3 Huxley Road
Surrey Research Park
Guildford, Surrey GU2 5RE
United Kingdom
TEL: 44 1483 401700
FAX: 44 1483 401701
Pulse
Southern Europe
Zone Industrielle
F-39270
Orgelet
France
TEL: 33 3 84 35 04 04
FAX: 33 3 84 25 46 41
Pulse
Pulse North China
China Headquarters
Room 1503
No. 1
Industrial District
Changan, Dongguan
China
TEL: 86 769 85538070
FAX: 86 769 85538870
XinYin Building
No. 888 YiShan Road
Shanghai 200233
China
TEL: 86 21 54643211/2
FAX: 86 21 54643210
Pulse South Asia
150 Kampong Ampat
#07-01/02
KA Centre
Singapore 368324
TEL: 65 6287 8998
FAX: 65 6280 0080
Pulse North Asia
No. 26
Kao Ching Road
Yang Mei Chen
Taoyuan Hsien
Taiwan, R. O. C.
TEL: 886 3 4641811
FAX: 886 3 4641911
Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product
names mentioned herein may be trademarks or registered trademarks of their respective owners.
© Copyright, 2006. Pulse Engineering, Inc. All rights reserved.
www.pulseeng.com
P617.A (3/06)
京公网安备 11010802033920号
EEWORLD
