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Tibeliusgatan 7 International Domestic LUNDAHL S-761 50 NORRTALJE Phone +46 - 176 13930 0176-13930 TRANSFORMERS SWEDEN Fax +46 - 176 13935 0176-13935 High Level General Purpose Transformer LL1588 LL1588 is a high-level general-purpose transformer which can be used for microphone or line input, for line output and for galvanic isolation. The windings are arranged to give perfect symmetry if the transformer is used in phase splitting input applications. The two coils structure also greatly improves immunity to external magnetic fields from e.g. power supplies and motors. Primary and secondary windings are separated by electrostatic shields. The core is a high permeability mu metal core. The transformer is housed in a mu-metal can. Turns ratio: 1 + 1 : 1 + 1 Pin layout (viewed from component side) and winding schematics: 1 10 5 10 4 9 2 7 LL1588 Top view 8 5 6 2 7 1 6 4 9 8 Dimensions (L x W x H above PCB, in mm) 47 x 28 x 24 Spacing between pins 5.08 mm (0.2") Spacing between rows of pins 35.56 mm (1.4") Rec. PCB hole diameter: 1.5 mm Weight: 115 g Static resistance of each primary: 61W Static resistance of each secondary: 61W Distortion (primaries connected in series, + 25 dBU 0.1% @ 50 Hz source impedance 150W ): + 28 dBU < 1 % @ 50 Hz Distortion (primaries connected in parallel, + 16 dBU 0.1% @ 50 Hz source impedance 150W ): + 22 dBU < 1 % @ 50 Hz Self resonance point: > 250 kHz Frequency response (source 150W, load 10 kW, 10 Hz -- 100 kHz +/- 1.0 dB serial connection): Phase response (deviation from linear phase) 20 Hz – 20kHz, +/- 0.5° Isolation between windings/ between windings and shield: 4 kV / 2 kV Connection alternatives and suggested applications: Serial-serial connection (1 : 1) for high level line Parallel-parallel connection (1 : 1) + isolation for low loss isolation application 5 10 5 10 4 9 Centertap 4 9 LL1588 LL1588 Top view 8 Top view 8 2 7 2 7 1 6 + + 1 6 + 5 10 4 9 Centertap Phase splitting LL1588 8 for 1 : 1+1 input Top view + 2 7 1 6 + R030312