Трансформатор LUNDAHL LL6702. Инструкция на английском языке

Tibeliusgatan 7                        International    Domestic
S-761 50 NORRTALJE         Phone    +46 - 176 13930   0176-13930
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Hybrid Transformer
LL6702
LL6702 is a hybrid transformer for telephone applications. It is built using a C-core, and meets requirements for
high isolation between windings.
The LL6702 has an extremely low leakage inductance and thus a flat frequency response curve. This makes it
easy to design the balancing network for good transhybrid loss in the entire frequency range.
Turns ratio:                                             1.5 , 1.5 : 1 + 1
Dims (Length x Width x Height above PCB (mm)):           47 x 31 x 15
Pin layout (viewed from component side) and winding schematics:
4                    6
5                10
4                  9
1                    7
LL6702        8
2                  10
(Top view)
2                  7
1                 6                5                    9
Spacing between pins:                                    5.08 mm  (0.2")
Spacing between rows of pins:                            30.48 mm (1.2")
Weight:                                                  70 g
Rec. PCB hole diameter:                           1.5 mm
Static resistance of primary (pins 1 - 4 ):              50W
Static resistance of balance (pins 2 - 5 ):              45W
Static resistance of each secondary (pins 6 - 7, 9 - 10 ):  36W
Max. DC current:                                         60 mA
Transhybrid loss (laboratory conditions):         50 dB, 10 Hz - 10 kHz
Isolation between primary and balance windings/ between
primary and secondary windings:                          2 kV / 4 kV
Typical application: Telephone hybrid using two LL6702:
Balancing network ZB:  Select ZB for minimum crosstalk which occurs when ZB equals actual line impedance.
In applications, this is often accomplished with a combination of a potentiometer and a series of capacitors
Line termination:  If RI = RO, the termination impedance, ZT , as seen from the two-wire side is:
ZT (AC) = 170 W + RI + RD.  Thus, ZT is independent of ZB.
ZT (DC) = 100 W + RD. RD is an optional resistor used to reduce the line DC current
.
RI
6  7  10 9                 4-wire input
4
2-wire telephone  1                   5    2    ZB
line               RD                                 2 x LL6702
1                   5
4                    2
6   7  10 9                    4-wire output
RO
R980626