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Cleverscope | Oscilloscopes

Cleverscope FRA Response for TPS55340 EVM

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..

  • Detail
  • Special Features
  • Specification

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