Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)
Introduction
Recently, we conducted a charging review of the IKEA SJÖMÄRKE wireless charger and found that it can draw nearly 15W but only provides a wireless output power of 5W. Although this may seem inefficient at first glance, it actually makes sense because its usage range is much larger than that of a normal wireless charger. And today, let's take it apart to examine its internal components and structure.
Product Appearance
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410512333.png)
The packaging box adopts a pure white design with the product name printed on the top left corner.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410512348.jpeg)
The usage range of 8-22mm (0.31-0.87 inches) is printed on the back.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410512682.jpeg)
It contains a power adapter, double-sided tapes, product manual and the wireless charging pad itself.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410512710.jpeg)
The power adapter is similar to the Apple 140W charger but with sharper edges.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410512934.jpeg)
All of the specs info is engraved on the side, although to be honest, the words are barely legible. Nevertheless, let's proceed. The model is ICPSW24-19-1, it can supports input of 100-240V~ 50/60Hz, 0.4A, and the output is 24V DC 0.8A Max 19W Max.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410513054.jpeg)
And it has passed multiple certifications.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410513391.jpeg)
The IKEA SJÖMÄRKE wireless charger is made of ABS and alloy materials with a fine-grain frosted process. It feels comfortable and smooth, and the built-in charging cable can prevent loss.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410513471.jpeg)
The black connector of the cable adopts a special dc barrel jack.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410513652.jpeg)
And the joint between the cable and wireless charging pad is reinforced with rubber sleeve.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410513780.jpeg)
Additionally, there is an LED indicator on the side that displays the device's work status. During normal charging, it will emit a steady white light.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410514047.jpeg)
The cross-shaped recessed area on the front of the IKEA SJÖMÄRKE wireless charger is the wireless charging area. This area can be used to charge mobile phones and earphones.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410514196.jpeg)
The back of the wireless charging pad features a metal cover module with a "concentric circle" design, which aids in heat dissipation during charging.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410514447.jpeg)
Model is E2018SJÖMÄRKE, it can supports input of 24V0.7A 16.8W, and the output is 5W Max.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410514625.jpeg)
There are four screw holes in each corner for users to use if they decide not to use double-sided tape.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410514887.jpeg)
The length of the IKEA SJÖMÄRKE wireless charger is about 173mm (6.81 inches).
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410515036.jpeg)
The width is about 86mm (3.39 inches).
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410515481.jpeg)
And the height is about 15mm (0.61 inches).
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410515511.jpeg)
The length of the charging cable is about 188cm (6.17 ft).
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410515896.jpeg)
This is how it looks like on my hand.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410515920.jpeg)
The weight of the wireless charging pad is about 287g (10.12 oz).
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410520166.jpeg)
And the total weight is about 383g (13.51 oz).
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410520391.jpeg)
After connecting the power supply, when the device is not charging, the power consumption of the IKEA SJÖMÄRKE wireless charger is 0.68W as measured by the PR10 power meter.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410520545.jpeg)
Then, we put a white foam between the phone and the charging pad to simulate the real world usage range of 8-22mm (0.31-0.87 inches) mentioned above.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410520651.jpeg)
When charged with an iPhone 14 Pro Max, the power meter shows a reading of 15.95W.
Teardown
Next, let's take apart the device and examine its internal components and structure, to see if we can find out how this charger achieved such a wide usage range.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410520981.jpeg)
Remove all the fixing screws.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410521142.jpeg)
The wireless charging pad can be divided into two oppositing part - the PCBA module on the left and the wireless charging coil on the right.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410521321.jpeg)
The PCBA module is also fixed with screws.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410522131.png)
The master control chip of wireless charging, two half-bridge drivers, four wireless charging MOSFETs, operational amplifier chip, buck circuit and detection circuit are on the front of the PCBA module.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410521713.jpeg)
And there are no components on the back.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410521972.jpeg)
The charging cable is reinforced with potting compound at the output end.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410522225.jpeg)
This SMD inductor marked with 142 is used for input filtering.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410522377.jpeg)
These threee MLCC capacitors are connected in parallel for filtering.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410522693.jpeg)
The buck chip that powers the master control chip is from MPS, model MP9841, which is actually a synchronous buck converter with integrated MOSFET. 36V 1A.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410522725.jpeg)
The 22μH buck inductor works with the MP9841.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410523092.jpeg)
The master control chip marked with 65IK X SC A U7H2145 is from Infineon.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410523194.jpeg)
The component located next to it is the external active crystal oscillator.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410523497.jpeg)
The LDO that powers the master control chip is from Infineon and is marked with E3. The model is IFX20002MBV33. It can provide a fixed output of 3.3V and supports enable control.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410523540.jpeg)
The quad op amp is from STMicroelectronics, model TSV994, which support rail-to-rail input/output.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410523917.jpeg)
The 74HC4051 analog switch is used to detect the distance of the capacitors.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410524135.jpeg)
And those two dual op amps are from TI and are marked with 1MAX. Model is LMV358A. They support low voltage rail-to-rail output.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410524397.jpeg)
A dual N/P-channel MOSFET marked with 49K is used for power supply control.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410525350.png)
The wireless charging full-bridge is composed of two half-bridges, and between the four MOSFETs are six parallel MLCC filter capacitors.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410524819.jpeg)
The half-bridge driver for the MOSFETs is from Infineon EiceDRIVER series and is marked with EDrWCDS006. The model is WCDSC006. 60V 2A/4A.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410525081.jpeg)
The MOSFET is from Infineon, model BSC035N04LS G, which adopts SuperSO8 package. 40V 3.5mΩ.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410525341.jpeg)
And all six MLCC capacitors adopt 1210 package.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410525560.jpeg)
These seven resonant capacitors connected in parallel adopt 1206 package.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410525892.jpeg)
The wireless charging coil is covered with capacitive sensor pad, which are used to detect the distance from the mobile phone to the wireless charger.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410525943.jpeg)
After removing the sensor pad, we can see a large charging coil underneath it. This is likely the main reason for the charger's impressive usage range.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410530288.jpeg)
And the capacitive sensor pad is connected to the PCB with this flat cable.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410530391.jpeg)
The NTC thermistor that detects the temperature of the wireless charger is connected to the PCB by two red wires, and they are reinforced with potting compound.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410530643.jpeg)
Uncover the coil, and the magnetic isolation sheet is pasted on the bottom with double-sided tape.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410530810.jpeg)
The isolation sheet is fixed in place by this square hole in the middle.
![Teardown of IKEA SJÖMÄRKE Wireless Charger (E2018SJÖMÄRKE)-Chargerlab](https://www.chargerlab.com/wp-content/uploads/2023/07/2023070410531722-scaled.jpeg)
One last look at all the components of this IKEA SJÖMÄRKE wireless charger.
Summary of ChargerLAB
The IKEA SJÖMÄRKE wireless charger can be easily attached to the underside of a desk or other piece of furniture using either double-sided tape or screws, allowing the traditional wireless charging pad to be hidden from view and giving a sleek, seamless appearance to your house. This particular wireless charger comes with a specialized power adapter and a 188cm (6.17 ft) charging cable, perfect for daily use. Additionally, it boasts an impressive 8-22mm (0.31-0.87 inches) usage range, making it capable of accommodating a wide range of table thicknesses.
After taking it apart, ChargerLAB discovered that this wireless charger utilizes components from highly-regarded semiconductor companies such as STMicroelectronics, Texas Instruments, and Monolithic Power Systems. Furthermore, it comes equipped with a generously-sized charging coil, which is considered to be the main contributing factor to its remarkable usage range.
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3. Review of IKEA SJÖMÄRKE Wireless Charger