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

HIGH FREQUENCY MAGNETICS
Specialty Surface Mount Shielded Transformer
TM00108
• Operates as high frequency pulse transformer in
telecom switching systems at various signaling rates
• Interwinding Electrostatic Shield provides low
capacitance and high EMI suppression
• Electrical equivalents: 2664A, 2741L2, 2779D
• 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
±2%
Pri : Sec
(5-2) : (4-1)
Secondary
Inductance¹
mH min
(4-1)
2779D
1:2
1.58
1. measured at 100 kHz, 0.05 Vac
2. measured at 1 MHz, 0.05 Vac
3. measured at 1 kHz, 1 Vac
4. with (5-2) grounded
5. with 6 grounded
DCR
Ω
max
(4-1) (5-2)
3.3
2.05
Secondary Leakage
Inductance²
µH
(4-1)
Interwinding & Winding to Shield
Capacitance³
pF max
(4-1) : 6⁴
(4-1) : (5-2)⁵
Minimum
Interwinding
Breakdown
Voltage
Vrms
8.5 max 6.5 min
12
3
1500
SCHEMATIC
2779D
5
4
2
1
6
1:2
©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
T1-17