13
4.4.2
Temperature of the WPP
As well as the ambient temperature, four other factors can cause the primary pad to become hot: gap,
misalignment, output power, and output voltage. The WPP has a heatsink attached by default to ensure
operation over a wide range of conditions. If the user wishes to remove the heatsink then they must
ensure the pad temperature can be kept low by using the charger system at low gap and misalignment,
or by only using the charger system in environments where the ambient temperature is not high.
The user may consider removing the heatsink if their operating conditions lie below the lines on the
following graph for maximum power and maximum output voltage.
6
8
10
12
14
16
18
20
-10
-5
0
5
10
15
20
25
30
35
40
45
Ai
r-g
ap
(mm)
Ambient Temperature (°C)
0 mm misalignment
10 mm misalignment
15 mm misalignment
20 mm misalignment
If the WPP becomes too hot, the charger system will self-protect by stopping operation until the
temperature drops to an acceptable level.
4.5
Operating limits
●
Operation in ambient above 50
°C
not recommended
●
Operation at gaps of larger than 20 mm is not guaranteed
●
Operation at misalignment of larger than 20 mm is not guaranteed
●
20 mm misalignment will not work at above 10 mm gap regardless of temperature or heatsink
●
15 mm misalignment will not work at above 15 mm gap regardless of temperature or heatsink
●
10 mm misalignment will not work at above 19 mm gap regardless of temperature or heatsink
