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Products » Wireless charging coils produced by TDK »

Wireless charging coils produced by TDK

Wireless charging coilsWith the appearance of large amount of smartphones, tablets, laptops and players on the market of modern electronic devices the demand in supplying of power towards such equipment without a direct connection through a wire and source has occurred. As known, the consumer's demand in the field of telecommunications is mainly due to both improved features and an expanded interface, as well as the ability to use all the functionality of mobile devices without time limits. In modern mobile devices more functions appear every year. At the same time, their energy consumption is growing. This fact leads to the frequent using of a charger. In this regard, the production of wireless chargers and their accessory equipment is one of the most urgent tasks facing developers of leading companies manufacturing new generation gadgets, as well as WPC (Wireless Power Consortium), consisting of more than 100 different companies, and other organizations which carry out active work in standardizing of wireless energy transmitters.

Not long ago TDK represented one of their latest achievements in their field of activity on the Russian market - inductors applied in wireless chargers installed in modern smartphones and other mobile devices. The thickness of some coils does not exceed 0.57 mm.

The TDK's success in the field of soft magnetic materials development and technological processes improvement led to the creation of unique ultra-thin and flexible magnetic sheets. Applied approaches have led to the creation of coils that are not only ultra thin and ultra lightweight. Such elements also have a high resistance to various types of mechanical stresses, providing durability and increased reliability. Moreover, despite the small thickness of the profile, the coil design minimizes the tendency to increase resistance and allows you to achieve a specified value of the power transfer coefficient, meeting at the same time all the Qi standards , designed especially for transferring of energy to various devices by means of magnetic induction.

Currently TDK offers:
  • Transmitting coils for Wireless Power Transfer
  • Receiving coils for Wireless Power Transfer applied in smartphones, cellular phones, handheld mobile terminals, DSCs and Wearable products
  • Small Rx (Receiving) Coil Units

Standard Tx coil units for wireless power charging (WPC) corresponding Qi standard

Such coils can be applied in various types of battery chargers (WPC compliant).
TDK Tx coils (WT100) which meet the requirements of the WPC Qi standard.
TDK ordering code WT-525225-20K2-A1-G WT-505090-20K2-A10-G WT-505090-10K2-A11-G WT-1005690-12K2-A6-G
WPC compliant Tx type WPC A1, A9 WPC A10 WPC A11 WPC A6
Input voltage A1 (19V); A9 (12V) A10 (19V) A11 (5V) A6 (12V)
Ferrite type Solid Flexible Flexible Flexible
Sheet size, mm 52 х 52 Ø50 Ø50 100 x 56
Coil turns 10 ts х 2 layers=20 ts 10 ts х 2 layers=20 ts 10 ts х 1 layers 12 ts х 1layers, 3 coils
Thickness of coil + sheet (mm) typ. 4,63 3,13 2,08 2,53
Coil outer size (mm) typ. Ø43 Ø43 Ø43 53.2 x 45.2
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Standard receiving Rx coil units for Wireless Power Transfer.

Such components can be applied in smartphones, cellular phones, handheld mobile terminals, and DSCs.
TDK ordering code WR303050-15F5-G WR444025-17M6-G WR444030-16F3-G WR483245-15F5-G WR483265-15F5-G
Inductance, µH 12,3 16,7 19,0 13,0 13,3
DC Resistance (Ω) 0.41 0.65 0.7 0.7 0.2
Efficiency (%) 66 68 70 72 73
Dimensions, mm 29,6х30 43,5х39,5 43,5х39,5 32,2х48,2 32,2х48,2
Thickness (mm) max 0,92 0,52 0,62 1,00 1,25
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Rx Coil unit Assembly
Small Rx Coil Units produced by TDK
TDK Ordering code WR221230-36M8-G WR222230-26M8-G WR301025-19M8-G
Inductance, µH 27,9 27 12,8
DC Resistance (Ω) 1,21 1,1 1,27
Dimensions, mm 22х12 Ø22 30х10
Thickness (mm) max 0,87 0,87 0,52
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09.10 19 

LEPCOS invites you to attend the Stand C23 at ChipEXPO 2019 exhibition, which will be held from 16 to 18 October 2019 in Moscow in the Expocentre, in the pavilion "Forum".


26.06 19 
According to the results of 2018 Lepcos has received "best ferrites seller 2018" seal of excellence from TDK company.

18.04 19 
Dear colleagues! We would like to draw your attention to the fact that, since December 2018, the package content of electrolytic capacitors has been changed.


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