Apple Apple's 24-inch iMac has been on the market for a while, equipped with Apple M1 processor its performance is 85% higher than the previous generation, while the body volume is 50% smaller, in addition to green, yellow, orange, pink, purple, blue and silver seven beautiful colors to choose from, fresh colors plus slim design, once launched instantly has become a favorite of many people.
The specific parameters will not be expanded, I believe that the small partners who like this iMac know it better than Xiaobian, and those who have the conditions have used it early to improve themselves. However, the power adapter related to the new iMac still needs to be talked about, after all, this is our own business.
Recently, the charging head network got the Apple 24-inch iMac original 143W adapter A2290, which took a lot of effort to get it, which is one of the reasons for the delay in disassembling. It comes with a special output cable, support 15.9V9A output, the following with the small editor to see the specific material workmanship of the power supply.
It is worth mentioning that the charging head network has also successively disassembled Apple 5W, 10W, 18W, 20W, 29W, 30W, 61W, 67W, 87W, 96W, 140W and other chargers, welcome to check.
First, the appearance of Apple iMac 24-inch original adapter
This adapter comes with its own output cable, while the input power cord is detachable, which can replace cables of different lengths for easy use.
The adapter body is Apple's classic square shape, the shell is high-gloss and the corners are overly rounded.
The front and back of the fuselage are designed with apple logos in the center, and I believe that no one will be unfamiliar with it.
The input terminal plum socket is designed as an independent module, which has the advantages of removable power cord and grounding.
There is also a network cable interface next to it, which is designed to provide users with one more way to connect to the Internet without affecting their own aesthetics for the iMac that pursues minimalism and thinness.
The adjacent sides are printed with the adapter's parameters
Model: A2290
Input: 100-240V 50/60Hz 2A
Output: 15.9V9A
The adapter has passed CE, EAC, NOM, NYCE, PSE, UL and other safety certifications, and has also passed the VI energy efficiency certification.
The output cable is bent.
The woven coat is woven with white and green threads, which has a rough feel but no burrs as a whole, and the process is very good.
The cable ends are made of metal housing and the surface is anodized blue.
Although the end is cylindrical, it is still very different from the common DC round head, and there is not only a circle of contacts inside, but also a rotary positioning device.
There are 12 contacts inside the terminal head to support network connectivity.
The measured length of the adapter body is 96.33mm.
The width is 96.13mm.
The thickness is 28.84mm.
The output cable length is approximately 2 meters.
Intuitive feeling in the hand.
The total weight of the fuselage belt cable is about 437g.
Second, Apple iMac 24-inch original adapter disassembly
The fuselage shell is taken apart from the side, and like other adapters in the Apple family, the shell is very thick and well protected.
In addition, the internal PCB board and components are basically black, familiar Apple style.
The input terminal yellow green wire and the network cable socket female are welded on the same small board, and the wire sleeve is protected by rubber sleeve insulation.
The back of the board is connected to a set of wires connected to the network cable assembly, and the jacket insulated pipe is protected.
The mesh wires are embedded in the gaps between the insulated plastic plates and glued and fixed.
The power core at the output is connected to a black flat plastic board terminal post with heat shrink tube insulation at the solder joints. The terminal posts have three screw holes, which are secured by a screw connection to the power board.
Removing the screws can reveal three copper leakages at the bottom of the plastic plate, which are fixed by screws and powered on by contact with the circuit board.
Remove the power module after removing the output screws and cover the back with a metal plate to dissipate heat.
The metal heat sink is secured by screws.
The input end of the fire wire, the zero wire and the motherboard welding, both ends are also covered with rubber sleeve protection.
Remove the screws and remove the heat sink.
The inside of the heat sink is pasted with insulation material, which corresponds to the PFC boost switch tube and the LLC half-bridge switch tube that is exposed to improve the heat dissipation effect.
The back of the PCB board is coated with black thermal adhesive to help conduct heat, and the PFC boost switch tube and LLC half-bridge switch tube are attached with graphite thermal guides to conduct heat to the metal heat sink.
The front of the module is provided with a double-layer metal heat sink plate on the side, the outer layer is integrated with the back metal plate, and the inner independent heat sink is designed for cooling the heat of the fairing bridge. A high-voltage filter electrolytic capacitor is placed horizontally in the center area, and the rubber sleeve insulation protection is provided at both ends.
On the other side, there is a double plastic plate between the transformer and the high voltage filter electrolytic capacitor for isolation.
The plastic board, heat sink, etc. are removed, the front of the board is much cleaner, and there is enough gap between the components, which can effectively avoid heat accumulation.
On the back of the motherboard, there is a PFC boost circuit in the lower right corner, an LLC switching power supply circuit on the left, and an optocoupler across the primary secondary.
Devices with input EMI filter rectification and PFC boost circuitry are available on one side of the board.
Above the tubular fuse is a common-mode inductor (removed) and is therefore protected by an insulating tube.
Remove the insulating tube, the fuse rated current 4A.
Close-up of common-mode inductors for filtering out EMI interference.
A close-up of another common-mode inductor, two-stage design.
TVR10621M varistors close-up for input overvoltage protection.
Safety X capacitance 0.33μF, when cutting the shell accidentally touched, not as it was, the right side is a rectifier bridge.
CLOSE-up of gbL10 rectifier bridge.
Close-up of the blue filter capacitor, silk screen printed FPS2W105 L091.
A close-up of another blue filter capacitor, silk screen FPS2W205 L001.
There is also a filter inductor in between.
The PFC boost controller adopts NXP TEA19162, which is used to boost the rectified voltage, perform active power factor correction, internally integrate X capacitor discharge components, no external components required, integrated soft-start and shutdown, support high-precision regulated boost, and built-in multiple perfect protection functions.
The dismantling of the charging head network has learned that the use of NXP TEA19162 also has Microsoft Xbox Series S host 165W power supply, Huawei 90W PD fast-charging gallium nitride charger, Microsoft Surface book3 original 127W charger, Apple MacBook Pro16 140W Gallium nitride charger, Huawei Honor 200W game book power adapter and other large brand products have been used.
The PFC boost switch tube is made of two Infineon 60C185C7s, which are customized for Apple.
Silk screen printed NEU6 M0A diode for PFC boost rectification.
ST ST's TVS diodes, silk-screen SUA, model SMA6F5.0A, are connected in parallel with the sampling resistor for current detection protection.
Close-up of the PFC boost inductor.
The middle is equipped with a high-voltage filter electrolytic capacitor, and the other side is equipped with a resonant inductor, a resonant capacitor, a main control chip power supply capacitor and a transformer.
The high voltage filter electrolytic capacitor is derived from Ruby and is 450V 120μF.
Resonant capacitance close-up.
Close-up of the resonant inductor.
The main control chip power supply capacitor is also from Ruby, and the specification is 35V 47μF.
The LLC switching power supply primary controller adopts NXP®s TEA19161T, which is combined with TEA19162 to form a switching power supply with APFC to improve power conversion efficiency.
Charging head network disassembly learned that the use of NXP TEA19161T also has Hongdashun 120W 2A2C four-port fast charge charger, Dell notebook 130W USB PD fast charger, Muffida 100W USB PD desktop fast charger, Anker PowerPort Atom PD 4 100W charger and other products have been used.
The LLC half-bridge switch is also made of Infineon 60C185C7, which is the same model as the PFC switch tube.
Transformer close-up.
Y capacitance close-up.
Close-up of the 1014-4108 optocoupler for output voltage feedback.
At a glance at the outputs, there are two output filtered solid capacitors on the right.
The secondary synchronous rectification controller uses the NXP® TEA2095, a synchronous rectification controller dedicated to LLC topologies with two synchronous rectification drive outputs.
The dismantling of the charging head network has learned that the use of NXP TEA2095 also includes the Anshu Intelligent 240W power adapter, SPRUCE 140W 3C1A wireless charging two-in-one charging cradle and other products.
LLC synchronous rectifier tube from ON Semiconductor, NTMFS5C628L NMOS tube, withstand voltage 60V, conductive resistance 2.4mΩ.
Close-up of another synchronous fairing tube.
Close-up of output filtered solid capacitors, Panasonic SEPF series conductive polymer capacitors, 5000 hours long life, specifications of 20V 560μF.
The other solid capacitor is the same, with a specification of 20V 560μF.
The protocol chip is also from Infineon, model CYPDC1185B2, the same model used in the iMac for power output control.
Output protection tube close-up, Nexperia PSMN1R0-30YLD, NMOS, withstand voltage 30V, conductivity 1mΩ, available in LFPAK56 package.
The power output terminal post is close-up and secured by screws.
Close-up of the network cable interface.
The small board is welded with a network transformer and filter inductors.
A glance at the back of the small board, the core weld is protected by injection molding.
All disassembled, let's take a family portrait.
Charging head net disassembly summary
Speaking of which, many of Apple's products have been dismantled, but this issue of dismantling the original adapter of the iMac is still the first time. Although this adapter has a classic square design, it comes with a special output cable that can both supply power and network.
But it is not surprising, after all, although the iMac and MacBook are computers, but there are still differences, so this adapter and the common PD fast charger is also very different, in addition to supporting wired network connection is also the result of the iMac's pursuit of minimalism and thinness.
Through disassembly, the charging head network found that the power cord inside this power supply is fixed with screws and terminal posts, simplifying the assembly process and designing to adapt to a variety of colors. In addition, the power supply adopts NXP®STE19162+TEA19161T+TEA2095 full set of APFC solutions, PFC boost switch tubes and LLC half-bridge switches, protocol chips from Infineon, and synchronous rectifiers from ON Semiconductors.
In addition, the Japanese ruby electrolytic capacitors and Panasonic SEPF series conductive polymer capacitors are also used for input and output filtering, and the overall planning and workmanship of the power supply is also very exquisite, and the overall level is quite high.