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IXBD4410PI 데이터시트(PDF) 11 Page - IXYS Corporation |
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IXBD4410PI 데이터시트(HTML) 11 Page - IXYS Corporation |
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11 / 11 page ![]() 11 © 2004 IXYS All rights reserved IXBD4410 IXBD4411 Fig. 11: Ferrite bead dimensions Fig. 12: Transmitter/Receiver Waveforms DS96528E(05/04) The nominal electrical specifications of the transformer are as follows: Open circuit inductance (100 kHz; 20 mV): 3 µH Interwinding capacitance: 2 pF Primary leakage inductance: 0.1 µH Turns ratio: 6:2 Primary-to-secondary isolation (1min): 1500 V~ Core permeability ( µ i): 125 The recommended ferrite bead is Fair Rite Products part number 2661000101, which is manufactured by: Fair-Rite Products Corp. Wallkill, NY Phone: (800) 836-0427 Web site: www.fair-rite.com As seen in the application drawings (Fig. 6, 9 and 12) a coupling capacitor (22 nF) and a damping resistor (22 Ω) are added in series with the primary side of the transformer. The capacitor will control the small amount of energy needed to transfer the signal to the companion driver. The resistor will control the damping of the signal and limit the peak transmitter output current. The receiver is designed to operate over a wide common mode input range. To reduce noise pickup, the receiver has ±250 mV of input hysteresis. If the signal is being distorted at the transmitter, the transmitter is probably running into current limit. A decrease in the coupling capacitance or an increase in the damping resistance should solve this problem. The receiver operates over a wide input range. The minimum amplitude for one side of the receiver is about 1 V and a maximum of about 3 V. It is critical that there be no overshoot on the transformer secondary wave- form. Each signal should be slightly overdamped. If significant overshoot exists, the received signal may be logically inverted. An increase of the damping resistor will solve this problem. |
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