Wireless charging transmitter coil offers high efficiency
Offering a durable construction and high permeability shielding, the Vishay Dale IWTX-4646BE-50 provides high efficiency greater than 70 % at a 19 V input voltage when tested using WPC-compliant transmitter and receiver chipsets and a Vishay Dale IWAS-4832FF-50 receiver coil with 2.7 mm spacing.
Designed for use in conjunction with the company’s WPC-compliant wireless receiver coils, the IWTX-4646BE-50’s high-saturation powdered iron is not affected by permanent locating magnets. As an alternative to larger ferrite-based solutions — which can saturate in the presence of a strong magnetic field — the IWTX-4646BE-50 offers a magnetic saturation of 50 % at 4,000 gauss.
The RoHS-compliant device features inductance of 24 µH at 200 kHz with a ± 5 % inductance tolerance, DCR of 71 mΩ (± 10 %) at + 25 °C, and Q of 185 typical at 200 kHz. The transmitter coil features a lead length of 40 mm and tinned length of 5 mm, heat rated current of 6 A, saturation current of 20 A, and self-resonant frequency of 7 MHz. AEC-Q200 certification for use in automotive applications is pending, and expected to be complete in Q1 2015.
Samples and production quantities of the IWTX-4646BE-50 Tx coil are available now, with lead times of 14 weeks for large orders.
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