Coil offers high efficiency for Qi wireless charging pads

Vishay Intertechnology, Inc. (Malvern, PA) announced a new powdered-iron-based, WPC-compliant (Wireless Power Consortium) wireless charging transmitter coil for Qi wireless charging pads. Offering a durable construction and high permeability shielding, the new 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. Other features include:

• Magnetic saturation of 50 % at 4,000 gauss.
• 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.
• 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. 

For more information on the IWTX-4646BE-50, visit www.vishay.com.

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