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 = _______