2795K Datasheet, PDF (1/2 Pages) Bel Fuse Inc. – HIGH FREQUENCY MAGNETICS T1/E1 Miniature Surface Mount Tranformers

HIGH FREQUENCY MAGNETICS
T1/E1 Miniature Surface Mount Tranformers
TM00143
• Meet pulse template and return loss requirements of T1/ • Operating temperature range: -40° C to +85° C
E1 interface circuits
• Meets IEC 695, 2-2 flammability requirements
• Designed to meet stringent requirements of low-voltage
applications
• PWB Process Capability: standard printed wiring board
assembly techniques, total-immersion cleaning
• Maximum inductance unbalance of center-tapped
windings is 0.2%
• Reliability testing: shock, vibration, temperature cycling,
temperature - humidity - bias
• Minimum interwinding breakdown voltage of 1500 Vrms
ELECTRICAL SPECIFICATIONS at 25° C
Part Number
Turns Ratio
± 1%
Primary
Inductance¹
mH min
Leakage
Inductance²
µH max
Pri : Sec
2795K
1 : 1.93CT
0.810
0.4
DCR
Ω
max
(4 - 6)
(3 - 1)
Interwinding
Capacitance
pF typ
Surge Voltage Capability³
Metallic Longitudinal
V peak
V peak
1.2
2.3
35
3000
2500
2795H
1 : 2CT
1.3⁴
0.5
1.8
3.7
45
2500
2500
2795L
1 : 2.1CT
1.1
0.6
1.8
3.8
47
2500
2500
2795J
1 : 2.45CT
0.950
0.4
1.5
3.7
45
2500
2500
1. measured at 10 kHz, 0.5 Vac
2. measured at 100 kHz, 0.1 Vac
3. See Supplementary Information
4. measured at 10 kHz, 0.1 Vac
Minimum Return Loss for 2795J and 2795K
used with Lucent 3.3 volt transceivers
Interface
Receive
Transmit¹
51 kHz
14 dB
9 dB
Frequency
102 kHz
20 dB
15 dB
2 MHz
20 dB
15 dB
3 MHz
16 dB
11 dB
SCHEMATIC
2795H
2795J
2795K
2795L
4
3
2 CT
6
Primary
1
Secondary
1. For transmit, only, place external capacitor of 470 pF ± 10% across winding (4-6)
©2000 Bel Fuse Inc. Specifications subject to change without notice. 04.00
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
T1-95