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Analyze power supply stability and gain/phase response using the Cleverscope CS328A and Jensen VB-1BB video isolation transformer for the Texas Instruments TPS55340EVM-148..
The Cleverscope FRA Response module provides an in-depth toolset to measure and assess the stability of power supplies, specifically through gain and phase margin analysis. By injecting small test signals (10 mV) into the feedback loop of the TPS55340 EVM power supply, it captures the response without perturbing the system. Using narrow band correlation, the system allows precise gain/phase measurement while minimizing interference from switching noise.
Key Functionality:
Power Supply Stability: Measures phase and gain margins to identify issues with transient response.
Frequency Sweep: Automated signal generation from 20 Hz to 200 kHz.
Real-Time Measurements: Direct observation of the power supply's dynamic behavior with minimal disruption.
Performance Benchmarking: Cleverscope's results align with industry-standard equipment like the Venable network analyzer, ensuring accurate readings.
Integration with TI TPS55340 EVM for real-time gain/phase measurement.
Synchronous signal capture with narrow band correlation for accurate frequency analysis.
Adaptive low-frequency boost for high coherence.
Phase margin (PM) and gain margin (GM) measurements to assess power supply stability.
Supports frequency sweep from 20 Hz to 200 kHz with automated logging.
| Parameter | Details |
|---|---|
| Compatible Device | Cleverscope CS328A, TI TPS55340EVM |
| Signal Injection | 10 mV peak excitation (via Jensen VB-1BB transformer) |
| Frequency Range | 20 Hz to 200 kHz |
| Measurement Method | Gain/Phase Response with Narrow Band Correlation |
| Phase Margin (PM) | 45° to 70° for optimal stability |
| Gain Margin (GM) | -13 dB tolerance before instability |
| Test Signal Method | Sweep with 20 steps per decade |
| Measurement Device | 14-bit ADC with 1.28 µs moving average filter |
| Low Frequency Boost | Adaptive, ensures accurate low-frequency response |
| Voltage Range | 12V (Nominal), 8V (Low-line), 24V (High-line) |
| Load Conditions | 2.5A and 1A for different scenarios |
| Response Time | 0.5 Hz to 200 kHz |