This is a following up for our teardown report of Apple 61W USB-C charger. We will also have a teardown article on the 30W USB-C charger coming. Today we are tearing down the Apple 87W USB-C Charger, the big brother of the 61W charger we teared down last time.

I. Unboxing

White packaging as usual.

It’s sold at 588 HKD in Hong Kong or US$79 in the US, the 61W askes for 548HKD or $69.

Designed in California and Made in China.

From left to right. 29W 61W 87W USC-C Power Adapter

Charger and user manuals.

Serial Number printed inside the power cord socket.

Same as the 61W charger, built-in fuse presented in the UK plug.

Measures at 80mm(3.15inch) for both height and width, only slightly larger than the 61W charger which is 74mm or 2.91inch.

The depth is 28mm or 1.1 inch, same as the 61W and 29W Apple USB-C charger.

Glossy finish with matte Apple Logo.

Weights around 318g or 11.22oz.

Specifications. 87W USB-C Power Adapter.
Input: 100-240V 1.5A
Output: 20.2V 4.3A, 9V 3A, 5.2V 2.4A
Manufactured by Delta Electronics

The USB-C female port has a metal casing to improve durability.

II. Review

We use the PD Sniffer feature of ChargerLAB POWER-Z KM001 UPM(USB Power Monitor) to detect the PDOs(Power Data Objects). We can see three three levels of voltages are supported. 5V 2.4A, 9V 3A, and 20V 4.3A.
Note that the current greater than 3A will only show up when a USB-C cable with built-in E-Marker chip that rated 5A is connected.

We use the PowerBay power monitor to monitor the power input.
The maximum power output at 5V level is 17W, 4.84V 3.5A. The input is 20.01W.

The maximum power output at 9V level is 31.7W, 8.7V 3.61A. The input is 37.18W.

The maximum power output at 20V level is 106W, 20.13V 5.27A, much greater than the rated 87W output. The input is 112W at the time.

III. Teardown

The casing of 61W USB-C charger is welded with ultrasonic as usual. It is extremely hard to open the case as many thermal glues were used.

Large piece of copper heatsink with thermal glues on both sides.

Insulation layer on the bottom of copper peice.

The other side, still a large piece of copper heatsink.

The two sides are connected in the middle.

Remove the heatsink, we can see there is also a insulation layer on top of the PCB.

Remove the insulation layer. Again, thermal paste all over the place.

The front view of the PCB.

The back of the PCB.

The power socket wirings are wrapped by heat shrink tubes and grounded.

We clean up the glues.

The USB-C socket is connected by three ribbon cables.

The USB-C female socket is laser beam welded together as a single unit.

NXP TEA18531 PWM contoller. The green high precison resistors ensures reliability even under long workload under high temperature.

VU SUA GP650 ST from STMicroelectronics.

K523 and KAEDN

Four opto-isolators that use light to transfer electrical signals.
LG48 V1014W and 1014-4108 V70468.

ON Semi NCP4304A and Infineon BSC077N12NS synchronous rectifier.

The outer layer is a very thick layer of copper served as heatsink. A lot of thermal glues are used to fill the gaps.

An safety capacitor with fuse on the top. Heat shrink tube is used to wrap the fuse.

10S621K varistor.

Two levels of common mode chok, this is quite costy in term of real estate.

Two Class Y capacitors.

A huge rectifier bridge covered inside a large piece of copper.

LT KBP408 6B45 printed on the recetifier bridge.

Two FPS2W105 L6D1 Class X capacitors in blue color.

Two Kemet tantalum electrolytic capacitor, 33μF 35V. T521 series, this is really expensive.

Nichicon 82μF 420V high voltage smoothing electrolytic capacitor.

The transformer. MP-130I(05) MY-MP15356 DELTA DCWM1703(19)6M13

Two Rubycon 200V4.7μF electrolytic capacitors.

We remove the transformer.

An active PFC is utlized in the power adapter. On the picture is a boost inductor. PFCH MP 15378 DCWM 1703(14)2XD05.

Infenon 11N80C3 switch, NXP BYV29X-600 rectifier diode,Toshiba K20A60U PFC boost.

Rubycon 820μF 25V and 330μF 25V electrolytic capacitor and a 220μF 25V polymer capacitor.

ON semi FDS6681Z PMOS served as switch for USB-C.

A daughter board connected by 20 pin connector.

The front of daughter board.

The back of daughter board.

Y651 715 33.

513 4670 1648.

BGXAS 327.

AAA BBP unknown chip. There is a inductor under it, so we suspect it is a voltage regulator.

STM32F071CBU7 microcontroller.

BGXAP 327.

Cypress CYPD 2134 USB Power Delivery protocol IC.

It is quite impressive to see it can output over 100W peak power.
It is not much larger and more expensive than the 61W USB-C charger, but the internal design and part selection is much better. Many premium components are used to increase safety and stability. There is even an active PFC inside such a tiny power adapter to increase efficiency. We strongly recommend choosing this power adaptor over the 61W one if your device can utilize power input over 60W.


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