ALQ07 Datasheet, PDF (25/28 Pages) Astec America, Inc – Technical Reference Notes

25
Thermal Consideration
When 48V input, 60℃ ambient temperature, and 150LFM airflow, ALQ07 series are
rated for full power, and in this condition the case temperature can reach 90℃. For
operation above ambient temperature of 60℃, output power must be derated as
shown in Figure ‘Temperature Derating’, meantime, airflow at least 150LFM over the
converter must be provided to make the module working properly. the case
temperature should be used to determine maximum temperature limits. The
minimum operating temperature for the ALQ07 is -40℃.
Temperature Derating Curves
MTBF
The MTBF, calculated in accordance with Bellcore TR-NWT-000332 is 1,800,000
hours. Obtaining this MTBF in practice is entirely possible. If the ambient air
temperature is expected to exceed +25℃, then we also advise an oriented for the
best possible cooling in the air stream.
ASTEC can supply replacements for converters from other manufacturers, or offer
custom solutions. Please contact the factory for details.
ALQ07 DC-DC Converter Technical Reference Notes
DATE: Aug., 9, 2003