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參數資料
| 型號： | PA0273 |
| 英文描述： | SMT 50 W Transformer for Semtech＇s SC4905A/B - (8/02) |
| 中文描述： | 貼片50瓦變壓器Semtech的SC4905A / B組- （8 / 02） |
| 文件頁數： | 1/1頁 |
| 文件大小： | 59K |
| 代理商： | PA0273 |
SMT 50 W TRANSFORMER
For use with Semtech's SC4905A/B
NEW!
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Mechanical
Schematic
Power Rating:
50W
Height:
10.3 mm Max
Footprint:
28.8 mm x 20.5 mm Max
Part
Number
Power
Rating
1
Turns Ratio
(with 7T Pri. Aux.)
Primary
Secondary
Isolation
Primary
Inductance
(μH MIN)
Leakage
Inductance
(μH MAX)
DCR
Primary
(m
MAX)
Primary Aux.
(m
MAX)
Secondary
(m
MAX)
PA0273
50 W
1.6:1:1
1500 Vdc Basic
230
.35
65
225
27
Electrical Specifications @ 25°C — Operating Temperature -40°C to 130°C
PA0273
Weight
. . . . . . . . . . . . . .13.2 grams
Tape & Reel
. . . . . . . . . . . .100/reel
Tray
. . . . . . . . . . . . . . . . . . .45/tray
Dimensions:
Inches
mm
Unless otherwise specified,
all tolerances are ±.010
0,25
PRELIMINARY P564.P (8/02)
For More Information :
Application Notes
The
PA0273
was designed for use with Semtech's SC4905A/B IC
datasheet application which details the solution for a low cost, discrete
component alternative to 50 W telecom power modules.
The
PA0273
transformer was designed for (but not limited to) the follow-
ing application:
Topology:
Two-switch forward
Pri./Sec. Isolation:
Basic Insulation (1500 Vdc)
Input Voltage:
36-72 v telecom input
Output Voltage(s):
12 v / 4.5 A output (with an auxilary primary side
control winding - 12 v/100 mA)
To determine if the transformer is suitable for your application it is neces-
sary to ensure that the temperature rise of the component (ambient plus
temp. rise) does not exceed its operating temperature. To determine the
temperature rise of the component it is necessary to calculate the total
power losses (core and copper) in the application.
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.
Printed on recycled paper. 2002, Pulse Engineering, Inc.
UNITED STATES
(Worldwide)
12220 World Trade Drive
San Diego, CA 92128
U.S.A.
http://www.pulseeng.com
TEL: 858 674 8100
FAX: 858 674 8262
UNITED KINGDOM
(Northern Europe)
1 & 2 Huxley Road
The Surrey Research Park
Guildford, Surrey GU2 5RE
United Kingdom
TEL: 44 1483 401700
FAX: 44 1483 401701
FRANCE
(Southern Europe)
Zone Industrielle
F-39270
Orgelet
France
TEL: 33 3 84 35 04 04
FAX: 33 3 84 25 46 41
TAIWAN, R.O.C.
(Northern Asia)
3F-4, No. 81, Sec. 1
HsinTai Wu Road
Hsi-Chih, Taipei Hsien
Taiwan, R.O.C.
Tel: 886 2 2698 0228
FAX: 886 2 2698 0948
SINGAPORE
(Southern Asia)
150 Kampong Ampat
#07-01/02
KA Centre
Singapore 368324
TEL: 65 287 8998
FAX: 65 280 0080
HONG KONG
(China/Hong Kong)
19/F, China United Plaza
1008 Tai Nan West Street
Cheung Sha Wan, Kowloon
Hong Kong, China
TEL: 852 2788 6588
FAX: 852 2776 1055
DISTRIBUTOR
Frequency:
250 kHz
Total Copper Losses (Pcu_total(W))
Pcu_total(W) = sum of the losses in each winding
The losses in each winding can be calculated by:
Pcu(W)= .001* DCR(m
) * (Irms
2
)
Core Losses (Pcore(W)) To calculate core loss, use the following formula:
CoreLoss (W) = 2.298 E-12 * (Freq_kHz)
1.6
* (^B/2)
2.5
Where:
^B = (Minimum_Input_Voltage)*(Maximum_DutyCycle)*
10
5
/ (4.96 * Freq_kHz)
Temperature Rise
Temp.Rise (°C) = 27.27*CoreLoss(W) + 47.4*Pcu_Total
Operating Temperature (°C) = Max.Ambient (°C) + Temp.Rise(°C)
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| PA0273NL | 功能描述:固定電感器 FORWARD XFMR RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm |
| PA0273NLT | 功能描述:固定電感器 FORWARD XFMR RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm |
| PA0273T | 功能描述:固定電感器 FORWARD XFMR RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm |
| PA0274 | 功能描述:固定電感器 SMT POWER BEAD IND RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm |
| PA0274NL | 功能描述:固定電感器 SMT POWER BEAD IND RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm |
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