Teardown of Apple A2676 35W Charger (Dual USB-C Port Fast Charging)
The front of the packaging box is printed with the Apple logo, the product name and the appearance.
In the back are the product names in several languages and usage.
The specifications sticker is on one side.
There is a production date sticker on the other side.
The package includes the charger and the instruction manual, etc.
The A2676 charger has a classic square design, a white glossy shell and rounded edges.
The prongs are removable and replaceable.
The removable design makes it easy for users to change prongs to meet different needs.
There are warnings on the shell.
The module is printed with the specification of 2.5A 250V~ and the manufacturer, Longwell.
The parameters are printed on the side of the charger.
Input: 100-240V~50/60HZ 1A
PD output 1 or 2: 5V3A, 9V3A, 15V2.33A, 20V1.75A
Maximum total output power: 35W Max
Manufacturer: Flex (Dongguan) Co., Ltd.
The certifications: CCC, KC and Level VI Energy Efficiency.
The two USB-C ports are white.
Its size is about 56.06 X 56.01 X 28.59 mm (2.2 X 2.2 X 1.12 inches).
That's what the charger looks like in my hand.
Its net weight is about 116g (4.09oz).
The USB-C1 port also supports four fixed PDOs of 5V3A / 9V3A / 15V2.33A / 20V1.75A.
The other USB-C2 port supports the same protocols and PDOs as the USB-C1 port.
When the two ports output simultaneously, the fixed PDOs of both ports are 5V3A, 9V1.94A, 15V1.16A, and 20V0.87A.
The Apple MacBook Pro shows that the serial number of Apple 35W is C4H2237027P1VHGAY.
The serial number tested by ChargerLAB POWER-Z MF001 is the same.
It is 8.94V 2.93A 26.18W when the charger is charging the iPhone 13 Pro Max.
When charging the iPhone 13 Pro and iPhone 13 Pro Max simultaneously, the two powers are all about 16.5W with non-stop intelligent power distribution.
When charging the earbuds and iPhone 13 Pro Max simultaneously, the powers are about 1.7W and 26.05W, respectively.
First, we use the cutter to open the shell.
The capacitor and PCB board are covered with a thermally conductive silicone cover.
Thermally conductive graphite inside the shell is for heat dissipation.
Take out the PCBA module inside the shell, and its bottom is also filled with a match silicone pad.
Another piece of the shell is also covered with a thermally conductive silicone cover.
The PCBA module has two parts, the AC power part and the DC buck part, where a separate plastic shell insulates the DC buck module.
The DC buck module is fully wrapped and insulated by a plastic shell.
The PCBA module's size is about 49.19 X 49.01 X 23.59 mm (1.93 X 1.92 X 0.92 inches).
The input wires adopt cold-pressed terminals, are protected by the heat shrink tube and soldered to the PCBA module.
The ground wire is screwed to the T-shaped fixed terminal and can be used with a three-phase extension wire to ground the charger.
The T-shaped terminal uses screws to fix the ground wire, and the other terminal is soldered to the DC buck module.
This is the front of the PCBA module. The Apple 35W dual-port charger adopts the secondary step-down transformer to make its output directly soldered to the small buck PCB board, which powers the buck circuit after synchronous rectification filtering.
The AC power's bridge rectifier and primary switch tube are at the back of the small PCB board.
Let's remove the silicone cover and insulating cover of the PCBA module.
This charger uses a switching power supply with a two-way buck circuit. The protocol chip controls the output voltage of the buck chip to meet the simultaneous fast charging of the dual-port. The secondary output of the transformer is directly connected to the output board, which acts as a synchronous rectifier to achieve buck output.
Here is the AC input end. The input fuse is fixed above the bracket. The X2 safety capacitor is on the left, and the three-dimensional common mode choke is on the right side.
The fuse is wrapped by a heat shrink tube for insulation.
The fuse is secured to the insulating bracket, the X2 safety capacitor is in on the left of the bracket, and on the right side, there is a common mode choke, adopting red and copper colored enameled wire wound on a magnetic ring and wrapped with insulating tape.
The X2 safety capacitor has a capacity of 0.1μF.
The bridge rectifier at the input comes from LITE-ON, with a screen printing of RTT10KL, which rectifies AC into pulsed DC.
The three high-voltage filter capacitors are from CapXon, with 22μF 400V and a total capacity of 66μF.
The differential mode choke uses a DR core with three electrolytic capacitors to filter the pulsed DC from the bridge rectifier into DC power for the switching power supply. The electrolytic capacitor and the differential mode choke are insulated by an integrated silicone cover, and the differential mode choker is not insulated by a heat shrink tube or tape.
The silicone cover holds three electrolytic capacitors and a common mode choke.
After removing the plug-in components on the front of the PCBA module, you can find a master control chip and a switch tube soldered on the front.
The primary master chip adopts a customized controller of Apple, with a screen printing of APSLC01, which is used inside the new Apple 30W charger and 96W charger.
One switch tube is from ST, with the screen printing of 16EPF6N2.
The transformer having a screen printing of 5001 is for primary current detection and eliminates the power loss in traditional sampling resistors.
The primary switch tube from AOS has a screen printing of 180A60 and the model of AONV180A60. It is an NMOS with a withstand voltage of 700V, a thermal resistance of 160mΩ and a package of DFN8 * 8.
One switch tube is from ST, with the screen printing of 65PF6N2.
The transformer is insulated with winding tape.
The electrolytic capacitor powering the primary master chip is 35V 47μF.
The silicone cover for the transformer and electrolytic capacitor helps to insulate.
A small board is soldered close to the transformer for output voltage feedback, which is soldered underneath the small output board. An insulating plastic cover is fixed on its back.
Underneath the plastic cover, there are the Y safety capacitor and the feedback optocoupler.
This is the black Y safety capacitor.
The EL1014 optocoupler is used for output voltage feedback.
The QR code is below the mylar pasted on the small board.
The other Y safety capacitor is fixed with a plastic insulating bracket.
Two inductors and filter capacitors are soldered to the small output buck board, corresponding to two synchronous buck circuits for buck output.
The back of the small board is insulated from the primary components by pasting a plastic shell.
A piece of copper foil is attached to the inside of the shell, which is grounded through a conductive fabric pasted on the PCB.
This is the conductive fabric to connect the copper foil.
The front of the small board is soldered with two buck inductors, two USB-C receptacles, a protocol chip and four solid capacitors for input and output filters.
On the left side of the back of the small board is a soldered synchronous rectifier; in the middle are two VBUS switch tubes. On the right side are two dual MOS tubes for the synchronous buck. The two on the right are synchronous buck controllers controlled by the protocol chip to adjust the output voltage.
This is the synchronous rectifier controller with the screen printing of TEV.
The synchronous rectifier tube from Infineon has a screen printing of 093N15NS and the model of BSC093N15NS5. It is an NMOS with a withstand voltage of 150V, a thermal resistance of 9.3mΩ and a package of SuperSO8.
The filter capacitor from Nichicon FP series solid capacitor is 270μF 25V.
The protocol chip is from Infineon and has a model of CYPD4236-LQXQT, which belongs to the EZ-PD CCG4 series. It supports dual-port fast charging. The EZ-PD CCG4 adopts the M0S8 technology of Cypress with a built-in 32-bit ARM M0 processor, 128KB flash memory and 8KB memory. It also uses a 6*6mm 40pin QFN package and a white pad.
This is is an MP9928 synchronous buck controller supporting 60V input from MPS. It has an internal integrated half-bridge NMOS drive with a programmable frequency of 100kHz-1MHz, supporting phase flip output, cycle-by-cycle overcurrent protection, overvoltage protection and overheat protection.
Two MP9928 synchronous buck controllers are used for the buck output of each of the two ports.
The FDMC007N30D synchronous buck switch tube from Onsemi is a dual NMOS tube with an asymmetric structure. It has an internal half-bridge, suitable for the synchronous buck. The two MOS tubes withstand the voltage of 30V. The upper buck tube's thermal resistance is 11.6mΩ, and the lower is 6.4mΩ.
The other MOS tube is the same model.
The five MLCCs for power supply filtering are in parallel connection.
The 6R8 alloy inductor is used with the buck circuit to step down the output voltage.
This is the other buck inductor.
The solid capacitor for synchronous rectifier to input filter is from Nichicon FP5K series, with the specification of 100μF 25V.
The two output filter capacitors are the same.
The two AON7428 output VBUS switch tubes from AOS are NMOS that withstands 30V voltage and has a thermal resistance of 2.3mΩ and a package of DFN3.3 * 3.3.
Here is the USB-C receptacle.
The USB-C receptacle with its cover inside the charger shell is a separate module.
OK, that's all for the teardown of the new Apple A2676 35W Charger.
Summary of ChargerLAB
The new Apple A2676 35W charger features a traditional design of the Apple family and is comparable in size to the 30W charger. The charger's single port supports 35W power output and automatic power distribution to meet the simultaneous charging needs of cell phones and laptops.
The USB-C ports support four fixed PDOs of 5V3A / 9V3A / 15V2.33A / 20V1.75A and Apple 2.4A, Samsung 5V2A, DCP protocol, and PD3.0 fast charging protocol. When charging the second device, the previous one will not be powered off, improving the user's experience.
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