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Home › Reviews › Chargers › AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside

Floyd
4 yearsagoChargers
1 0

At CES2019. Aukey announced the development of three ultra-fast GaN-based wall chargers: a 27-Watt USB-C model (PA-Y19), a 30-Watt USB-C model (PA-Y21) and a 24-Watt charger with two USB outputs (PA-U50). These power supplies are designed using GaNFast™ devices from Navitas Semiconductor. Today we are going to teardown the smallest one of the three, the 27W PA-Y19.


I. Design

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Aukey 27W USB PD GaNFast comes with an industrial card box, no fancy stuff.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

GO GREEN WITH AUKEY.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

A warranty card and a user manual.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

The charger is a square box in pure white. Under the AUKEY logo is a green USB-C port with PD lettering.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Foldable prongs, US standard.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Detailed product specifications on the side of the charger. Model PA-Y19, input support 100-240V~ 0.65A 50/60Hz, output supports USB PD fast charging, output: 5V/3A, 9V/3A, 12V/2.25A, 15V/1.8A, 20V/1.35A, maximum 27W. The product has passed the VI (6) energy efficiency level, and has CE and RoHS certification.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

In comparison, the AUKEY 27W PD charger is about half the size of the Apple 30W charger, one and a half size of the Apple 5W charger. So the AUKEY has a very high power density.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

With ChargerLAB Power-Z KT001 USB Power Monitor, we know that the AUKEY 27W PD charger supports USB PD 3.0 protocol with 5V/3A, 9V/3A, 12V/2.25A, 15V/1.8A, 20V/1.35A 27W max output.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

It also supports Apple and USB DCP charging protocol.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Use the AUKEY 27W PD charger to charge the iPhone XS, our ChargerLAB POWER-Z KM001C reads 9.03V 2.01A 18.2W, under PD protocol.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Our Mate 20 Pro (UD) is getting 9.02V 1.8A 16.28W, under PD protocol.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Our Mi8 is getting 9.03V 1.83A 16.56W, under PD protocol.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Charging the iPad Air 3 at 15.02V 1.73A 26.05W, under PD protocol.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Charging the MacBook Pro at 19.7V 1.29A 25.54W, under PD protocol.


II Teardown

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

The charger can be opened from its plug area.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

The internal consists of multiple PCBs.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

An insulating frame is used between the PCBs to provide insulation and support for enhanced strength. The lower PCB board is the primary side, and the input end is soldered with two metal domes for connecting with the pins.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

The gap between the parts inside the PCB is filled with the thermal paste.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

From the output side, the inside of the PCB is almost filled with glue. The USB-C port is soldered and fixed to the secondary PCB through a small PCB. The vertical PCB on the right is connected to the primary side and the secondary side, with a primary rectifier bridge, optocouplers, X capacitors, and other components.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

On the outside of the side PCB board is a rectifier bridge and an optocoupler.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

2A rectifier bridge.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

CT1018 optocoupler for output voltage feedback and protection.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Taking a look at the outside of the primary PCB. The largest component is the GaN GaNFast power IC from Navitas, and on the upper right corner is the main control chip.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

The NV6252 is a high-performance, easy-to-use, world's first half-bridge GaNFast power IC, optimized for high frequency, soft-switching topologies. The feature-rich, monolithically-integrated GaNFast power IC with simple logic inputs, harnesses two high performance eMode GaN FETs (600 mΩ high-side, 300 mΩ low-side) to create the fastest, smallest, most efficient powertrain in the world. GaNFast power ICs extend the capabilities of traditional topologies such as flyback, half-bridge, buck/boost, resonant, etc. to MHz+ and enable the commercial introduction of breakthrough designs. We have seen the adoption of GaNFast ICs on products like the Anker PowerCore Fusion PD and RAVPower 45W GaN PD.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Detailed specification of the Navitas NV6252 GaNFast Power IC.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

UCC28780 from TI is a high-frequency active-clamp flyback controller that enables high-density AC-to-DC power supplies with a variable switching frequency of up to 1 MHz. User programmable advanced control law features allow performance to be optimized for both Silicon (Si) and Gallium Nitride (GaN) power FETs.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Detailed specification of the TI UCC28780.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

The three chips on the outside of the secondary PCB are synchronous rectification controller, synchronous rectification MOS tube and USB PD protocol chip.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

MPS MP6908A synchronous rectification controller, a fast turn-off intelligent rectifier that supports 600kHz switching frequency.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Detailed specification of the MPS MP6908A.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

AO AONS62922 output synchronous rectification MOS tube, NMOS, withstand voltage 120V, low resistance, optimized for synchronous rectification.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Detailed specification of the AO AONS62922.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

The Weltrend WT6615F is used for PD protocol and feedback to regulate the output voltage.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

The WT6615F is a highly integrated USB Power Delivery (PD) controller that supports USB PD 3.0 Programmable Power Supply (PPS) specification and Qualcomm Quick Charge 4 or Quick Charge 4+ technologies designed for USB Type-C Downstream Facing Port (Source) charging applications such as power adapters, wall chargers, car chargers, power strip, power banks, and etc.


Next, we take apart the PCBs and check out more internal details.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

0.1μF X capacitor and input common mode inductor to suppress interference.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Blue Y capacitor across the primary side and the secondary side.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Two high-voltage electrolytic capacitors with specifications of 400V 22μF. There is a magnetic loop inductor between the two capacitors. The red patch component is an input fuse.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

A copper foil is grounded on the transformer core to reduce interference.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

The secondary multilayer insulation wire of the transformer is directly soldered to the small output PCB.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Two output 180μF 25V solid capacitors are parallelled for filtering, and the output port PCB is soldered to the lower board.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

1R0 output filter inductor.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

Output current sense resistor and VBUS switch tube to provide overcurrent short circuit protection for output.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

A Y capacitor across the two PCBs.

AUKEY PA-Y19 27W PD Charger Teardown Review: GaNFast Inside-Chargerlab

All the components.


III ChargerLAB conclusion


By comparing the size of the AUKEY 27W USB PD GaNFast charger with conventional USB PD chargers, we can clearly see the advantages of the former in terms of compactness, which has twice the power density of conventional chargers. The AUKEY 27W USB PD GaNFast charger is not only compact, but also has foldable prongs for better portability. It has a full range of USB PD output voltage and is compatible with both phones and laptops.

In our teardown, we found that this charger introduced the GaNFast technology by Navitas, with the world's first integrated drive half-bridge GaN IC - the NV6252 built in. The high integration of the chip omits the peripheral driver circuit, and the high efficiency eliminates the heat sink, which are the main reasons why this charger can be so small yet powerful. In addition, this charger uses multiple PCB design, which maximizes the space usage inside and further shrinks the size of the charger.

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