Product Group: Vishay Dale, Inductors / October 2014
Author: Doug Lillie
Tel: 1 605-668-4131
E-mail: doug.lillie@vishay.com
New IWTX-4646BE-50 Wireless Charging
Transmitter Coil
Product Benefits:

Powdered iron based

Not affected by permanent locating magnets

Durable construction

High permeability shielding

Provides high efficiency greater than 70 % at a 19 V input
voltage

When tested using WPC-compliant transmitter and
receiver chipsets and an IWAS-4832FF-50 receiver coil
with 2.7 mm spacing

Blocks charging flux from sensitive components or batteries

Magnetic saturation of 50 % at 4000 gauss

AEC-Q200 automotive certification to be complete in Q1 2015
Market Applications:

WPC compatible and Qi wireless charging pads
The News:
Vishay Intertechnology Wireless Charging Transmitter Coil Offers High
Efficiency for Qi Wireless Charging Pads
Vishay Intertechnology, Inc. (NYSE: VSH) announces a new powdered-iron-based, WPC-compliant (Wireless
Power Consortium) wireless charging transmitter coil for Qi wireless charging pads.

Designed for use in conjunction with Vishay's WPC-compliant wireless receiver coils

Provides an alternative to larger Ferrite-based solutions, which can saturate in the presence of a
strong magnetic field

AEC-Q200 certification is pending
Key Device Specifications:

Efficiency > 70 %

50 % magnetic saturation at 4000 gauss

24 µH inductance at 200 kHz
Product Group: Vishay Dale, Inductors / October 2014

± 5 % inductance tolerance

DCR of 71 mΩ (± 10 %) at +25 ºC

Q of 185 typical at 200 kHz

40 mm lead length

50 mm tinned length of 5 mm

6 A heat rated current

20 A saturation current

7 MHz self resonant frequency
The Perspective: Designed for use in conjunction with Vishay's WPC-compliant wireless receiver coils in Qi
wireless charging pads, the Vishay Dale IWTX-4646BE-50 offers a durable construction and high permeability
shielding. When tested using WPC-compliant transmitter and receiver chipsets and an IWAS-4832FF-50 receiver
coil with 2.7 mm spacing, the device provides high efficiency greater than 70 % at a 19 V input voltage. 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 4000 gauss.
Availability: Samples and production quantities of the IWTX-4646BE-50 Tx coil are available now, with lead
times of 14 weeks for large orders.
To access the product datasheet on the Vishay Web site, go to
http://www.vishay.com/ppg?34377 (IWTX-4646BE-50)
Contacts:
THE AMERICAS
EUROPE
ASIA/PACIFIC
Doug Lillie
Vishay Intertechnology, Inc.
doug.lillie@vishay.com
Jens Walther
Vishay Electronic GmbH
jens.walther@vishay.com
Victor Goh
Vishay Asia Pte Ltd.
victor.goh@vishay.com