Shenzhen Hpmont Technology Co., Ltd. Chapter 1 Safety Information and Precautions
HD5L-PLUS Series User Manual V1.0 3
Altitude and Derating
In area where altitude exceeds 1000 meters, HD5L-PLUS should be derating since the heatsink
efficiency will be reduced because of the tenuous air.
The rated value of output current derates by 1% for each 100m increase of the altitude. I.e for the
altitude of 3000m, derated rate is 20% for rated current of HD5L-PLUS. Figure 1-1 is the derating curve
of rated current and the altitude.
Figure 1-1 Derating curve of rated current and altitude
70%
100%
1000m 4000m
Altitude
Rated current of controller
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