2779A Datasheet, PDF (1/2 Pages) Bel Fuse Inc. – HIGH FREQUENCY MAGNETICS Specialty Surface Mount Shielded Transformer

HIGH FREQUENCY MAGNETICS
Specialty Surface Mount Shielded Transformer
TM00107
• Operates as a high frequency pulse transformer or
as a high frequency analog transformer in various
telecom circuits requiring very high voltage step-up
ratio
• Interwinding Electrostatic Shield provides low
capacitance and high EMI suppression
• Electrical equivalents: 2664F, 2741P2, 2779A
• Operating temperature range: -40° C to +85° C
• Meets IEC 695, 2-2 flammability requirements
• PWB Process Capability: standard printed wiring board
assembly techniques, total-immersion cleaning
• Reliability testing: Shock, vibration, temperature cycling,
temperature - humidity - bias
ELECTRICAL SPECIFICATIONS AT 25° C
Part Number
Nominal Turns
Ratio
±1%
Inductance²
µH min
DCR
Ω
max
(3-7) : (2-1)¹
(2-5)
(3-8) (4-7) (2-1)³
2779A
1 CT : 25 CT
300
1.92
1. connect 4 to 8
2. measured at 100 kHz, 0.02 Vac
3. connect 4 to 8 & 2 to 7
4. (3-8) to 6 with (2-1) grounded
5. (4-7) to 6 with (2-1) grounded
6. (3-7) to (2-1) with 6 grounded and 4 connected to 8
Leakage
Inductance ²
µH max
(3-7)¹
0.20
Interwinding
Capacitance^{4, 5, 6}
pF max
5
Minimum
Interwinding
Breakdown
Voltage
Vrms
500
SCHEMATIC
3
8
CT
4
7
2779A
2
5 CT
1
6
1 : 25
©2000 Bel Fuse Inc. Specifications subject to change without notice. 09.00
Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] • www.belfuse.com
T1-15