Home Cleverscope | Oscilloscopes Cleverscope CS448 vs Pintek DP25 for Gate Drive Measurement
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Cleverscope | Oscilloscopes

Cleverscope CS448 vs Pintek DP25 for Gate Drive Measurement

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The Cleverscope CS448 and Pintek DP25 differential probes are compared for high-speed gate drive measurements. The CS448 offers more accurate measurements of high-side gate drive slew rates and common mode rejection, revealing true signal behavior without spurious ringing..

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The CS448 and Pintek DP25 were compared for their ability to measure high-speed gate drive signals, with a particular focus on common mode rejection and slew rate accuracy.

  • With 7V common mode swing: The CS448 correctly tracks the gate drive signals without the ringing observed in the Pintek DP25, which struggles with high edge rates causing inaccurate readings.

  • With 300V and 500V common mode swing: The Pintek DP25 shows large spurious common mode slew-induced ringing, which distorts the measurements. In contrast, the CS448 delivers true signal representation, even with high common mode swing.

  • Miller Capacitance Effects: The CS448 reveals the Miller plateau, showing how gate drive signals are pulsed high during turn-off, an important characteristic in half-bridge circuits. The Pintek DP25 fails to capture useful information during this event.

  • High-Speed Measurement: Capable of probing high-side gate drive signals with slewing common mode in about 10ns at 30 MHz bandwidth.

  • Improved Common Mode Rejection: CS448 offers better performance in rejecting common mode swings compared to the DP25.

  • Real-Time Signal Capture: CS448 displays accurate gate drive signal transitions without the ringing effects seen in differential probes.

  • Wide Voltage Handling: Effective even at 300V to 500V common mode swing, maintaining signal integrity.

Parameter Cleverscope CS448 Pintek DP25
Common Mode Rejection Excellent, with minimal ringing Poor, exhibits spurious ringing at high common mode swing
Bandwidth 30 MHz 50 MHz
Slew Rate Accuracy Accurate, even for fast transitions in gate drive Distorted at high slew rates, causing false readings
Voltage Range Handles 300V to 500V common mode Struggles with high common mode voltage (>300V)
Probing Accuracy High-side gate drive slewing captured accurately Significant inaccuracies at high-speed switching
Response to Common Mode Swing Shows true signal without spurious ringing Shows large recovery slew and ringing
Application Ideal for gate drive measurements and fast switching events Better suited for lower-speed, less demanding measurements