Document 529
For Linear Technology
Flyback Transformer LTC4267 PoE PD Interface
The D1766-AL multiple-output transformer was developed
for use with Linear Technology LTC4267 Power over Eth-
ernet IEEE 802.3af PD Interface with Integrated Switching
Regulator. It is ideal for use in telecommunications isolated
converters and isolated power supplies.
age of 36 – 72 Volts. It features interleaved primary and
secondary windings to minimize leakage inductance and
1500 Vrms isolation between windings.
Coilcraft can also custom engineer a transformer to meet
your specific requirements. For free evaluation samples,
contact Coilcraft or visit www.coilcraft.com.
This low-profile transformer is designed for an input volt-
Inductance
at 0 Adc2
10ꢀ ꢁ(µH
Inductance
at Ipk3
min ꢁ(µH
Leakage
Turns ratio
pri : S1 pri : S2,S3
Part
DCR max
ꢁOhmsH
Inductance4
max ꢁ(µH
Ipk3
ꢁAH
number1
Outputs5
D1766-AL_
221
200
0.420 (pins 1 – 3)
5.1
9.6 : 1
24 : 1
1.5 3.3 V, 0.5 A (S3)
2.5 V, 1.5 A (S2)
0.013 (pins 8
0.013 (pins 7
–
–
5)
6)
1.8 V, 2.5 A (S1)
0.015 (pins 10
0.030 (pins 12
–
–
9)
11)
1. When ordering, please specify packaging code:
D1766-ALD
2. Inductance is for the primary, measured at 200 kHz, 1.1 Vrms, 0 Adc.
3. Peak primary current drawn at minimum input voltage.
4. Leakage inductance is for the primary and is measured with secondary
windings shorted.
5. All outputs are referenced to ground.
6. Operating temperature range –40°C to +125°C.
7. Electrical specifications at 25°C.
Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic
tape (175 parts per full reel).
B = Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge), use
code letter D instead.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Dot indicates pin 1
1
12 3.3 V
Core material Ferrite
Terminations RoHS tin-silver (96.5/3.5) over tin over
nickel over phos bronze. Other terminations available
at additional cost.
Pri
S3
1
12
11
10 2.5 V
3
D1766-AL
0.810
max
Weight 12.7 g
20,57
S2
Ambient temperature –40°C to +125°C
XXXXY
Storage temperature Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
9
8,7
6
7
1.8 V
Resistance to soldering heat Max three 40 second
reflows at +260°C, parts cooled to room temperature
between cycles
1.181
max
S1
30,00
5,6 GND
Parts manufactured prior
to December 2011 may
be marked differently.
The secondary windings are to
be connected in series on the
board by connecting pins 9, 8
and 7 together and pins 11 and
10 together. Outputs at pins 12,
11,10 and 8,7 are referenced
to ground (pins 5,6).
Moisture Sensitivity Level ꢁMSLH 1 (unlimited floor
life at <30°C / 85% relative humidity)
Failures in Time ꢁFITH 38 per billion hours
Mean Time Between Failures ꢁMTBFH
26,315,789 hours, calculated per Telcordia SR-332
0.450
11,43
max
Packaging 175 per 13″ reel Plastic tape: 44 mm wide,
0.4 mm thick, 32 mm pocket spacing, 11.9 mm pocket
depth
0.004/0,10
0.084
2,13
0.969
24,6
PCB washing Tested with pure water or alcohol only.
For other solvents, see Doc787_PCB_Washing.pdf.
0.827
21,0
0.130
3,30
0.930
0.028
0,72
0.050
23,62
1,27
6
1
7
1
Recommended
Land Pattern
12
0.118
3,0
0.118
3,0
inches
mm
Dimensions are in
Document 529 Revised 12/22/11
US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2013
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
5秒后页面跳转
AO3401场效应管参数、引脚图、应用原理图
BT131可控硅参数及引脚图、工作原理详解
74LS32芯片参数、引脚图及功能真值表
全球首块英伟达H200交付 黄仁勋“送货上门”
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
