Powersolve PS150W Series Manual de usuario descargar pdf (Pagina 3)

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High Density DC-DC Modules

Application Note

Derating:

The case operating temperature range of the PS150W series is -40°C to +100°C. When operating the PS150W series, proper derating

or cooling is required.

Following is the derating curve for the PS150W without a heatsink; airflow along width (transverse).

Where:

The power dissipated (Pd):

Pd = Pi - Po = Po (1-n) / n

The thermal resistances are listed below:

Chart of Thermal Resistance vs Air Flow:

AIR FLOW RATE TYPICAL Rca

Natural Convection 20ft/min. (0.1m/s) 7.12°C/W

100ft./min. (0.5m/s) 6.21°C/W

200ft./min. (1.0m/s) 5.17°C/W

300ft./min. (1.5m/s) 4.29°C/W

400ft./min. (2.0m/s) 3.64°C/W

500ft./min. (2.5m/s) 2.96°C/W

600ft./min. (3.0m/s) 2.53°C/W

700ft./min. (3.5m/s) 2.37°C/W

800ft./min. (4.0m/s) 2.19°C/W

The temperature rise (∆T):

∆T = Pd * Rca

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Powersolve PS150W Series Manual de usuario Pagina 3