參數(shù)資料
型號(hào): P0770
英文描述: POWER MAGNETICS CATALOG (68 pages) - (5/02)
中文描述: 功率磁性元件產(chǎn)品目錄(68頁(yè)) - (5 / 02)
文件頁(yè)數(shù): 21/68頁(yè)
文件大?。?/td> 2741K
代理商: P0770
19
PC500.B (5/02)
US 858 674 8100
UK 44 1483 401 700
France 33 3 84 35 04 04
Singapore 65 287 8998
Taiwan 886 2 2698 0228
Hong Kong 852 2788 6588
http://www.pulseeng.com
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 mWatts (ROS 1) and 280 mWatts (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:
ROS 1:
TempRise (C) = (Total Losses (mW))
.833
x 1.45
ROS 2:
TempRise (C) = (Total Losses (mW))
.833
x .508
4. To determine copper losses, calculate:
CopperLoss (mW) = I
DC
2
x DCR
5. For core loss in mWatts, using frequency f (in Hz) and operating
flux density B (in Gauss), calculate:
ROS 1: CopperLoss (mW) = .127 x 10
-10
x f
1.26
x B
2.11
ROS 2: CopperLoss (mW) = .887 x 10
-10
x f
1.26
x B
2.11
6. For flux density (B), calculate ET (V-μsec) for the application,
and multiply by ET
10
factor from the table.
A
MAX
G
F
E
B
MAX
C
D
Suggested Pad Layout
F
1
2
Mechanical
Schematic
Notes:
ROS 1
ROS 2
Weight
....................0.29 grams .............1.1 grams
Tape & Reel
...............2000/reel................600/reel
PKG
A
B
C
D
E
F
G
ROS 1
.335
8,51
.225
5,72
.125
3,18
.250
6,35
.100
2,54
.050
1,27
.250
6,35
ROS 2
.545
13,84
.390
9,91
.215
5,46
.440
11,18
.120
3,05
.065
1,65
.440
11,18
MINIATURE SURFACE MOUNT
POWER INDUCTORS
Dimensions:
Inches
Unless otherwismm
0,25
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