IKEA SJÖSS USB Charger E2501-NA EMC Test Report

General Product Information

Product Function and Intended Use: The Equipment Under Test (EUT) is the SJÖSS USB Charger. Further details are available in the user's manual.

Ratings and System Details:

• Rated Input: AC 100-240 V, 50/60 Hz; Max. 0.5 A
• Output:
  • 5.0 V @ 3.0 A (15.0 W)
  • 9.0 V @ 2.22 A (20.0 W)
  • 12.0 V @ 1.67 A (20.0 W)
  • 15.0 V @ 1.33 A (20.0 W)
• Protection Class: II

This model was previously EMC tested in report CN241QVO 001. This report covers updates including the addition of a CM inductor and the replacement of component U1.

Components

Independent Operation Modes: The EUT operates continuously with a matching load.

Description of Interconnecting Cables: None.

Noise Generating and Noise Suppressing Parts: Refer to the circuit diagram for details.

Highest Frequency: The highest frequency generated or used in the device is less than 108 MHz.

Submitted Documents: Circuit diagram, user's manual, and rating label.

Remarks and Revision History

Remarks

1. All test equipment used was calibrated according to the laboratory's calibration program and meets relevant standards. Traceability is ensured by the management system. Detailed information on test conditions, equipment, and measurement uncertainty is available upon request.
2. This document is digitally signed. TÜV Rheinland has not verified legal or other requirements applicable to this document; this is the user's responsibility. Digital signature validity can be confirmed by a separate document upon request to the sales department (an environmental fee may apply). For verification, visit go.tuv.com/digital-signature.
3. Test clauses marked with '*' were subcontracted. Deviations from specifications are listed in the respective test clauses.
4. The decision rule for conformity statements based on numerical results uses the "Zero Guard Band Rule" and "Simple Acceptance" as per ILAC G8:2019 and IEC Guide 115:2021, unless otherwise specified. Measurement uncertainty is not considered in the report.

Revision History

Test Set-up and Operation Modes

Principle of Configuration Selection

For emission testing, the EUT was configured to achieve the highest possible emission level. Test conditions were adapted according to the instructions for use. Radiated emission tests were performed on 2025-05-14, and conducted emission tests were performed on 2025-05-13.

Equipment and Cable Arrangement

Conducted Emission Setup: The setup includes the Equipment Under Test (EUT), a Line Impedance Stabilization Network (LISN), an EMI receiver, a computer, a transformer, and a power supply. The EUT is placed on a 0.8m high table. The conducted emissions are measured via the LISN.

Radiated Emission Setup: The setup includes the EUT, an EMI receiver, a computer, a transformer, a power supply, and an antenna. The EUT is placed on a 0.8m high wooden table. The antenna is positioned at a distance of 3m from the EUT. The antenna height is varied from 1m to 4m, and the table is rotated 360° to find maximum disturbance. Measurements are taken for both horizontal and vertical antenna polarizations.

Test Software

No special test software was used during the tests.

Special Accessories and Auxiliary Equipment

A matching load was used for the USB port load during all testing.

Countermeasures to Achieve EMC Compliance

No special measures were employed to achieve EMC compliance beyond the standard setup.

Conformity Decision Rule

For all EMI tests in this report, compliance with limits is determined by directly comparing measurement results with corresponding limits. This is because the measurement uncertainties are less than the values specified in CISPR 16-4-2. Measurement uncertainties are not taken into consideration for the final determination.

Test Results: Emission

5.1 Emission in the Frequency Range up to 30 MHz

5.1.1 Mains Terminal Continuous Disturbance Voltage

Result: Passed

Date of Testing: 2025-05-13

Test Procedure: FCC 47 CFR Part 15, Subpart B:2023, ICES-003:2020, ANSI C63.4-2014 and CISPR 16-2-1

Frequency Range: 0.15 - 30 MHz

Limits:

• Quasi-peak limit: 0.15-0.5 MHz: 66 to 56 dBμV (decreasing with frequency); 0.5-5 MHz: 56 dBμV; 5-30 MHz: 60 dBμV.
• Average limit: 0.15-0.5 MHz: 56 to 46 dBμV (decreasing with frequency); 0.5-5 MHz: 46 dBμV; 5-30 MHz: 50 dBμV.

Bandwidth of EMI receiver: 9 kHz

Measurement Time: 1 s

Test Site: Shielded room

Input Voltage: AC 120 V, 60 Hz

Operational Mode: As defined in clause 2.3

Ambient Condition: Temperature: 17.4 °C; Relative humidity: 49.3 %

Expanded Measurement Uncertainty (k=2): 2.33 dB

The minimum margin to the limit was 9.4 dB at 0.683250 MHz, which is higher than the expanded measurement uncertainty.

The measurement setup followed ANSI C63.4-2014. The EUT was placed 0.8 m from the Artificial Mains Network (AMN). The power cord was folded to form a bundle of 0.3 m to 0.4 m. Tests were performed on both neutral and phase lines.

Figure 1: Spectral Diagrams, Conducted Emission, 150 kHz – 30 MHz, Line L

This figure shows the spectral plot of conducted emissions on the phase line (L). The plot displays measured levels (dBμV) against frequency (Hz). Red lines indicate the quasi-peak and average limits. Data points represent measured quasi-peak and average values.

Final Quasi-peak measurement result (Line L):

Final Average measurement result (Line L):

Figure 2: Spectral Diagrams, Conducted Emission, 150 kHz – 30 MHz, Line N

This figure shows the spectral plot of conducted emissions on the neutral line (N). The plot displays measured levels (dBμV) against frequency (Hz). Red lines indicate the quasi-peak and average limits. Data points represent measured quasi-peak and average values.

Final Quasi-peak measurement result (Line N):

Final Average measurement result (Line N):

5.2 Emission in the Frequency Range above 30 MHz

5.2.1 Radiated Emission (30 MHz - 1 GHz)

Result: Passed

Date of Testing: 2025-05-14

Test Procedure: FCC 47 CFR Part 15, Subpart B:2023, ICES-003:2020, ANSI C63.4-2014 and CISPR 16-2-3

Frequency Range: 30 - 1000 MHz

Limits (3 m distance):

• 30-88 MHz: 40 dBμV/m
• 88-216 MHz: 43.5 dBμV/m
• 216-960 MHz: 46 dBμV/m
• Above 960 MHz: 54 dBμV/m

Bandwidth of EMI receiver: 120 kHz

Measurement Time: 1 s

Test Site: Semi-anechoic chamber

Input Voltage: AC 120 V, 60 Hz

Operational Mode: As defined in clause 2.3

Ambient Condition: Temperature: 17.4 °C; Relative humidity: 51.4 %

Expanded Measurement Uncertainty (k=2): 5.40 dB

The minimum margin to the limit was 15.7 dB at 192.475000 MHz, which is higher than the expanded measurement uncertainty.

The radiated disturbance test was conducted in a semi-anechoic chamber with a 3 m test distance. The EUT was placed on a 0.8 m high wooden table. The table was rotated 360°, and the antenna height was varied from 1 m to 4 m to find maximum disturbance. Measurements were performed with horizontal and vertical antenna polarizations.

Figure 3: Spectral Diagrams and measurement results, horizontal polarization (30 MHz to 1 GHz)

This figure shows the spectral plot of radiated emissions for horizontal polarization. The plot displays measured levels (dBμV/m) against frequency (Hz). The red line indicates the quasi-peak limit. Data points represent measured quasi-peak values.

Final Quasi-peak measurement result (Horizontal Polarization):

Figure 4: Spectral Diagrams and measurement results, vertical polarization (30 MHz to 1 GHz)

This figure shows the spectral plot of radiated emissions for vertical polarization. The plot displays measured levels (dBμV/m) against frequency (Hz). The red line indicates the quasi-peak limit. Data points represent measured quasi-peak values.

Final Quasi-peak measurement result (Vertical Polarization):

7 List of Test and Measurement Instruments