Power Supply Testing Methods & Procedures | Levane Power

Ensuring Long-Term Reliability in Harsh Environments

For applications with extremely high reliability requirements—such as automotive, airborne (tethered drones), and marine environments—rigorous testing and validation are the core of quality assurance. Levane Power strictly adheres to automotive-grade and classification society standards, establishing a comprehensive testing system covering electrical performance, safety, environmental adaptability, and long-term reliability. Below are our core testing methods and procedures.

I. Basic Electrical Performance Testing

Basic electrical performance testing is the first step in verifying whether a power supply meets fundamental specifications, ensuring stable operation under standard conditions.

II. Dynamic Response & Protection Function Testing

Dynamic response testing simulates extreme conditions such as load transients or input fluctuations in real-world applications, verifying the power supply's transient stability and the effectiveness of protection mechanisms.

III. Safety Performance Testing

Safety testing is critical for compliance with international certification standards (such as CE, CCS, DNV), ensuring the safety of both users and equipment.

IV. Environmental & Reliability Testing

For demanding applications such as automotive, marine, and airborne systems, Levane Power performs environmental adaptability tests that far exceed ordinary industrial standards.

V. Specialized Reliability Testing (Automotive-Grade)

Levane Power incorporates reliability validation methods from the automotive electronics industry to ensure long-term stability under extreme operating conditions.

1. Repeated Short Circuit Test

• No-Load to Short Circuit: Repeated short circuit (1s short / 1s release) for 2 hours

• Full-Load to Short Circuit: Short circuit maintained for 2 hours

• Short Circuit Start-Up: Output shorted before power-on, repeated 10 times

• Acceptance: Auto-recovery after fault removal, no component damage

2. Repeated Power-On/Off Test

• Condition: Full load at 220V, overvoltage setpoint -5V, undervoltage setpoint +5V

• Method: 15s on / 5s off for 2 consecutive hours

• Acceptance: Normal operation, no performance degradation

3. Input Voltage Dip & Dynamic Load

• Condition: Input jumps between undervoltage+5V and overvoltage-5V, output jumps between full load and no load

• Duration: 1 hour

• Acceptance: Stable operation, no damage

4. High-Voltage No-Load / Low-Voltage Current-Limit Operation

• High-Voltage No-Load: Overvoltage-3V input, no-load operation for 2 hours

• Low-Voltage Full-Load: Undervoltage+3V input, full-load operation for 2 hours

• Note: Must be performed at maximum operating temperature

VI. Test Equipment & Tools

Levane Power is equipped with advanced testing instruments to ensure accuracy and traceability of test data.

VII. Summary of Test Procedures

Every Levane Power product undergoes the following complete testing process:

Phase 1: Incoming Inspection

• 100% inspection or sampling of all components

• 100% inspection of critical components (MOSFETs, transformers, electrolytic capacitors)

Phase 2: Sub-Assembly Testing

• In-Circuit Test (ICT)

• Preliminary functional test

Phase 3: Finished Product Testing (in order)

1. Visual and mechanical inspection

2. Insulation and dielectric strength test

3. No-load / light-load functional verification

4. Input characteristic test

5. Output accuracy and efficiency test

6. Ripple and noise test

7. Dynamic response test

8. Protection function verification

9. Temperature rise test

10. Environmental tests (high temp, low temp, humidity, salt spray, vibration)*

11. Long-term burn-in (48-168 hours)

12. Final performance re-test

Phase 4: Outgoing Inspection

• 100% functional re-test before packaging

• Visual and accessory check

• Test report included with shipment (customizable)

Note: Environmental tests are selected based on product application scenarios (e.g., salt spray test mandatory for marine products, vibration test mandatory for automotive products).

VIII. Standards Compliance

Levane Power's testing system strictly complies with the following international and national standards:

IX. Test Reports & Data Traceability

Every Levane Power product shipped can be accompanied by:

• Test Report: Measured data for all test items

• Burn-In Record: Voltage, current, and temperature curves during burn-in

• Certificate of Conformity: Unique serial number for traceability to test records

Quality Commitment: Levane Power delivers safe, efficient, and durable power solutions to global customers with automotive-grade reliability standards.