Datasheet

Diw

Dil

Dol

Dow

Doo

Doe

bq500410A

SLUSB96 – NOVEMBER 2012

www.ti.com

A6 Coil Specification

The coil and matching capacitor specification for the A6 transmitter has been established by WPC Standard. This

is fixed and cannot be changed on the transmitter side.

The bq500410A is primarily intended to drive a 3 coil array but it can also be used to drive a single coil. For

single coil operation the two outer coils and associated electronics are simply omitted. Please refer to the

application schematic at the end of this datasheet (See Figure 6).

Figure 3. Coil Specification Drawing

Table 2. Coil Specification

PARAMETER SYMBOL SPECIFICATION UNIT

Outer length Dol 53.2, (±0.5)

Inner length Dil 27.5, (±0.5)

Outer width Dow 45.2, (±0.5) mm

Inner width Diw 19.5, (±0.5)

Thickness Dc 1.5, (±0.5)

Turns N 12 Turns

Layers - 1

Odd displacement Doo 49.2, (±4)

Even displacement Doe 24.6, (±2)

NOTE

The performance of an A6 transmitter can vary based on the design of the A6 coil set. For

best performance with small receiver coils under heavy loading, it is best to design the coil

set such that the Doo dimension is on the low end of the specified tolerance.

For a current list of coil vendors please see:

• bqTESLA Transmitter Coil Vendors, Texas Instruments Literature Number SLUA649

Product Folder Links: bq500410A