Step 1: Calculate Power Dissipation in Device (Pdiss)

    Already know your Pdiss? Enter it below just under the dotted line.

    • Supply: Volts
    • Current: mA
    • Pin:
    • Pout:
    • DC Power: Watts
    • Gain: dB
    • Drain/Collector Efficiency: %
    • Power Added Efficiency: %
    • Power Dissipated In Device (Pdiss): Watts
    Already know your Pdiss? Power Dissipated In Device (Pdiss): Watts

    Step 2: Calculate Max Junction Temperature

    • Maximum Case (Tbase) Temperature: °C
    • Rth Junction To Case: °C/Watt


    Measured values vary based on application and measurement method. The most accurate data is located on the product data sheet.

    • Max Junction Temperature: °C

    Formulas Used

    • DC Watts = Supply V × Current / 1000
    • Gain (dB) = Pout dBm - Pin dBm
    • Pin Watts = (10^(Pin dBm / 10)) / 1000
    • Pout Watts = (10^(Pout dBm / 10)) / 1000
    • Drain/Collector Efficiency % = (Pout Watts / DC Watts) × 100
    • PAE % (Low Gain < 25dBm) = (Pout Watts - Pin Watts) x 100 / (DC Watts)
    • Pdiss Watts = DC Watts + Pin Watts - Pout Watts

    • Temperature Change °C = Rth Junction to Case × Pdiss Watts
    • Max. Junction Temperature at max. Case Temp = Temp Change °C + max. Case Temp°C
    • Note: Tbase = interface between part and PC board/heatsink.


    Have questions about using this tool? Email the Qorvo Tools team and we will be happy to assist you.

    Disclaimer: Qorvo makes no representations or warranties of any kind, express or implied, about the completeness, accuracy, or reliability of the tools on this web page. In no event will Qorvo be liable to any user of these tools for any loss or damages, including without limitation, indirect or consequential damages arising out of or associated with the use of these tools.