FTR: 2.2uH 3A inductor
FUNCTIONAL TEST REPORT
DC-DC CONVERTER MODULE
Description: DC-DC CONVERTER MODULE TPS562201DDCR with 2.2uH 3A Inductor (SP26040439)
| Product Code | HW Version | 01 | ||
| Tested By | Date |
1. Required Equipment
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DC Power Supply: Variable voltage with current limiting.
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Electronic Load: Supporting CC (Constant Current) and CV (Constant Voltage) modes.
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Oscilloscope: Minimum 100MHz bandwidth.
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Digital Multimeter (DMM): High precision (4.5 digit preferred).
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Thermal Measurement: IR Thermometer or Thermal Camera.
2. Test Procedures
Step 1: Visual Inspection & Continuity Check
| Ref | Test Item | Acceptance Criteria | Result (P/F) | Notes |
| 1.1 | Visual Assembly | No missing components, no cold solder joints. | ||
| 1.2 | Input Impedance | Resistance between $V_{in}$ and GND > 100k$\Omega$. | ||
| 1.3 | Output Impedance | Resistance between $V_{out}$ and GND > 10k$\Omega$. |
Step 2: Basic Functional Test (No Load & Light Load)
| Ref | Test Condition | Parameters | Measured Value | Evaluation |
| 2.1 | Nominal $V_{in}$, No Load | Output Voltage $V_{out}$ (V) | ||
| 2.2 | Nominal $V_{in}$, No Load | Quiescent Current $I_{q}$ (mA) | ||
| 2.3 | $V_{in}$ Min to Max range | Line Regulation (%) |
Step 3: Load Regulation & Efficiency Test
Set $V_{in}$ to nominal value.
| Load (%) | Output Current (Iout) | Output Voltage (Vout) | Ripple (Vpk−pk) | Efficiency (%) |
| 10% | ||||
| 50% | ||||
| 100% |
Step 4: Dynamic Performance (Oscilloscope)
| Ref | Test Item | Waveform Description | Measured (Pk-Pk) | Result |
| 4.1 | Ripple & Noise | Check for high-frequency switching noise. | ||
| 4.2 | Soft-start / Startup | Smooth ramp-up, no significant overshoot. | ||
| 4.3 | Transient Response | Load step 25% $\to$ 75% $\to$ 25%. |
Step 5: Protection Mechanisms
| Ref | Protection Type | Test Method | Module Behavior | Evaluation |
| 5.1 | Over-Current (OCP) | Increase load to >120% of rated. | Shutdown or Foldback | |
| 5.2 | Short-Circuit (SCP) | Short the output terminals. | Hiccup or Shutdown | |
| 5.3 | Over-Temp (OTP) | High load + restricted airflow. | Thermal shutdown |
3. Thermal Analysis (After 30 min at Full Load)
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Power IC Temperature: ........... $^\circ$C
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Inductor Temperature: ........... $^\circ$C
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MOSFET/Diode Temp: ............ $^\circ$C
4. Final Conclusion
$\square$ PASSED: Module meets all technical specifications.
$\square$ FAILED: Reasons: .............................................................................................................
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