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14.6: Circuit Verification Data Sheet

  • Page ID
    26078
  • 1. Output Voltage and LED Test: LED operational _________

    Output Voltage Range of Adjustment _______ to ________

    2. Adjust output to 5 VDC with a 20 ohm load resistor attached to the output.

    Calculated Load Current _________ Measured Load Current _________

    Calculate the power being dissipated by the 20 ohm resistor? _________

    3. Calculate the expected turns ratio of the transformer from the transformer data listed on the Bill of Material. Calculate and measure \(V_{Sec}\) RMS.

    Calculated n = _________ Calculated \(V_{Sec}\) RMS = __________

    Measured \(V_{Pri}\) RMS = _________ Measured \(V_{Sec}\) RMS = _________

    4. Calculate the expected DC Voltage (VDC) and Peak to Peak Ripple \((V_{rpp})\) out of the filter circuit using the formula: \(V_{rpp} = I_{LOAD}/f_C\) where \(f\) = frequency and \(C\) is the value of the filter capacitor. Use a load current of 70 milliamps.

    Calculated VDC = __________ Calculated \(V_{rpp}\) = __________

    5. Measure the DC Voltage (VDC) and Peak to Peak Ripple \((V_{rpp})\) out of the filter circuit values with the 20 ohm resistor in place:

    Measured VDC = __________ Measured \(V_{rpp}\) = __________

    6. Measure VDC and \(V_{rpp}\) of the output voltage of the power supply with the 20 ohm load resistor in place.

    VDC of the Power Supply Output = _______

    \(V_{rpp}\) of the Power Supply Output = _______

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