Siglent SDS-2000-PA Power Analysis Option.
1. Achieve cost-effective analysis of your switching mode power supply (SMPS) characteristics
Siglent's SDS2000PWR are power measurement and analysis options. The embedded application provides a quick and easy way of analyzing the realibility and efficiency of your switching power supply.
2. Power Device Analysis
The switching loss in a power supply determines its efficiency. You can characterize for instantaneous power loss and conduction power loss at the switching device over a designated switching cycle. To determine the effieciency of the power supply it is very important to measure the power loss during dynamic load changes. By measuring the switching loss and conduction loss, you can characterize the instantaneous power dissipation in your switching power supply. Locating peak switching loss helps you analyze the reliability of the power supply. The di/dt and dv/dt represent the rate at which the current and voltage change at switching. This helps in analysis of reliable operation of the switching mode power supply
3. Line Power Analysis
Perform the pre-compliance line harmonic testing of your power supply to the IEC 61000 3-2 standards. This analysus presents 40 harmonics.
The Inrush current analysis measures the peak inrush current of the power supply when the power supply is first turned on
4. Power Quality analysis
The Power Quality analysis shows the quality of the AC input line. Some AC current may flow back into and back out of the load without delivering energy. This current, called reactive or harmonic current, gives rise to an "apparent" power which is larger than the actual power consumed. Power quality is gauged by these measurements: power factor, apprarent power, true power, reactive power, crest factor, and phase angle of the current and voltage of the AC line.
5. Modulation Analysis
Modulation analysis allows designer to quickly see the on-time and off-time information of the PWM signal. Plotting the embedded variation of on time in PWM signal over a long period of time can reveal the control loop response of the feedback loop system. This measurement performs data trending on the switching variation of the acquired waveform in the following format
- Frequency
- Period
- Duty Cycle
- Positive pulse width
- Negative pulse width
6. Output Analysis
Output analysis includes characterization of ripple component in output DC voltage. Ripple is the residual AC component that is superimposed on the DC output of a power supply. Line frequency as well as switching frequency can contribute to ripple. This measurement analyzes the output voltage ripple. This measurement analyzes the output voltage ripple and presents the peak-to-peak value as well as the frequency response of the captured signal.
7. Turn on/off Time Analysis
This analysis measures the time taken to get to the steady output voltage of the power supply after the input voltage is applied ( turn on time ) and for the output voltage of the power supply to turn off after the input voltage is removed (turn off time.)
8. Transient Response Analysis
Power supplies are subject to transient conditions, such as turn-on and turn-off transients, as well as sudden changes in output load and line input voltage. These conditions lead to one of the key specifications of the power supplies; load transient response. This analysis measures the load transient response of the DC output, namely the time taken for the DC output to stabilize during a load change.
9. Effieciency Analysis
Effieciency analysis tests the overall efficiency of the power supply by measuring the output power over the input power. This analysis requires a 4-channel oscilloscope because input voltage, input current, output voltage, and output current are measured.
10. Probe Deskewing
We strongly recommend to also purchase the DF2001A De-skew Fixture.
Because the PA option compares the phases between VOLTAGE and CURRENT, their relationship need to be very known very accurately. The De-skew Fixture corrects for any uncertainties and offsets between voltage and current in the system. The measurement could still be made without them but some amount of error will occur if the skew is not corrected.