The charging head network has purchased a 180W gallium nitride charger from Transsion's Infinix brand, which is equipped with European plugs and a single USB-C port. The charger model is U1800XEA, and the marked output power is 20V9A 180W, and the measured charger supports 20V5A universal PD fast charging, and also supports 33-21V5A PPS fast charging, which can be compatible with mobile phone and laptop fast charging. Let's bring the dismantling of Transsion's charger, and take a look at the internal scheme and materials.
The main body of the Infinix 180W GaN charger adopts an integrated white shell, with obvious transitions between the upper and lower ends of the upper and lower ends, and the waist is high-glossy and glossy.
The Infinix brand is printed on the front center of the fuselage.
A 180W Hyper Charge is printed on the center of the back, indicating the maximum output power of the product.
The input terminal of the charger is an integrated gray shell, and the product parameter information is printed, and it has passed EAC and CE certification.
The charger model is U1800XEA, which supports 100-240V 50 60Hz 3A wide voltage input, as well as 5V3A, 4-20V9A output, and the maximum output power is 180W.
The charger is equipped with European pins.
The output is equipped with a single USB-C interface, which is arranged on one side.
The height of the main body of the measured charger is 5617mm。
The width is 6602mm。
The thickness is 3179mm。
Feel the size of the charger in your hand.
In addition, the net weight of the product was measured to be about 175g.
Using the ChargerLab Power-Z KM003C, the USB-C port of the charger supports QC30、tfcp、pd3.0, PPS, QC5, DCP charging protocol.
The PDO packet shows that the USB-C port also has four sets of fixed voltage ranges: 5V3A, 9V3A, 15V3A, and 20V5A, as well as 33-21V5A set of PPS voltage ranges.
After reading the appearance and test of this charger, let's disassemble it and take a look at the internal scheme and materials.
First, pry open the charger shell along the side seam of the pins, and the pins are connected with the PCBA module through wire soldering.
The wire is cold-pressed terminal welding, and the terminal is insulated with heat shrinkable tube.
The wires are connected to the prongs by crimping.
The PCBA module is fixed inside the housing by means of a card slot.
Extract the PCBA module from inside the housing.
There is a heat sink on the top of the PCBA module.
There is a white isolation board insulation between the primary and secondary stages, and the synchronous rectifier tube is equipped with a heat sink and glued to fix.
The back of the PCBA module is equipped with a white plastic isolation board, and a metal sheet is pasted to enhance heat dissipation.
The length of the PCBA module measured by vernier calipers is about 616mm。
The width of the PCBA module is about 491mm。
The width of the PCBA module is about 265mm。
Remove the heat sink on the front of the PCBA module, and glue and paste the heat conduction corresponding to the PFC boost inductor.
The front of the PCBA module is soldered at a glance, the bottom is welded with an input fuse and a high-voltage filter capacitor, the lower left side is welded with a common mode inductor, a safety X2 capacitor, and the top is soldered with a thin film filter capacitor, a filter inductor and a Y capacitor. Weld the PFC boost inductor in the middle position, weld the transformer on the right side, and weld two filter solid capacitors and USB-C interface boards on the top.
Remove the heat sink on the back of the PCBA module, hollow out the position of the GaN switch tube and rectifier tube corresponding to the plastic insulating board, and glue to strengthen the heat dissipation.
A rectifier bridge is welded on the right side of the PCBA module, PFC controller and PFC switch tube are welded in the middle position, and PFC rectifier tube is welded below. Weld the flyback controller, flyback switch tube on the lower left side. Two optocouplers are welded on the upper left, and a synchronous rectifier controller is welded on the top.
Through the observation of the PCBA module, it is found that the Infinix 180W GaN charger adopts PFC+ flyback switching power supply architecture and synchronous rectification. The output voltage is fed back by the protocol chip through the optocoupler, and the voltage output is in a wide range. Both the PFC switch and the flyback switch are from Innoscience, so let's start with the input to understand the information of each device.
The input end of the charger is welded with fuses, common mode inductors, safety x2 capacitors, high-voltage filter capacitors and other components.
The input fuse is from Better Electronics, the discharge number is 932, and the specification is 5A 250V.
The common mode inductor is wound with enameled wire and insulated wire, and the bottom is welded with an insulating bracket.
The green NTC thermistor is used to suppress the inrush current at the power-up.
The side of the PCBA module is welded with blue Y capacitors, thin film filter capacitors, filter inductors, common mode inductors and safety X2 capacitors.
The safety X2 capacitor is from SEC Chenggong Industries and has a specification of 033μf。
The other common-mode inductor is wound with flat copper wire and an insulating bracket welded to the bottom.
The rectifier bridge is from QIANGMAO, model MSB4M, specification is 1000V 4A.
A rectifier bridge of the same type is welded on the front of the PCB, and both are half-bridge connections and the heat is evenly shared.
Both thin-film filter capacitors are rated at 1 F450V.
The filter inductor is made of magnetic surrounding, and an insulating bracket is pasted at the bottom.
The PFC controller adopts Silergy Corp. SY5072B, silk screen D9, runs in critical mode, operates with constant on-time, and the built-in boost converter adopts quasi-resonant switch, and the valley floor is turned on to obtain high efficiency and optimize EMI performance.
The PFC step-up switch is from Innoscience, model INN650D150A, which is a GaN high-voltage single tube with a withstand voltage of 650V, a transient withstand voltage of 750V, a conduction resistance of 150M, and a DFN8*8 package. The INN650D150A supports ultra-high switching frequencies, no reverse recovery charge, very low gate and output charge, meets the requirements of JEDEC standards for industrial applications, has built-in ESD protection, and is RoHS-free, lead-free, and EU REACH compliant.
The PFC boost inductor is wound with an ATQ17 core and is labeled with 180W power.
The PFC rectifier is from Pingwei, model ES5JGR, which is an ultra-fast recovery diode with 5A current and withstand voltage of 600V.
The RS3MBF diode is used for PFC bypass.
The high-voltage filter capacitor from Aihua is a small volume capacitor for RK series fast charging, with a specification of 420V27 F, using five parallel capacitors, with a total capacity of 135 F.
The switching power supply PWM controller from Dialog, model IW9801, is a high-performance digital switching power supply flyback controller, supporting zero-voltage switching and adaptive multi-mode control operation, and can achieve high power density and high output accuracy design with secondary controller. The IW9801 can be used in conjunction with Dialog's secondary-side controllers to provide less than 20mW of no-load power consumption.
The main switch is from Innoscience, model number INN650D150A, the same model as the PFC switch tube.
The filter capacitors and transformers that supply power to the main control chip are soldered on the side of the PCBA module.
The filter capacitor that supplies power to the main control chip is 100V10 F.
The transformer is made of ATQ25 core, and the secondary is wound with multi-layer insulated wire.
Two 1009 optocouplers are used for PFC control and output voltage feedback.
The output side is welded with a synchronous rectifier tube, a filtered solid state capacitor, a USB-C female board and a blue Y capacitor.
Close-up of two blue Y-capacitors.
The synchronous rectifier controller comes from Jiehuat, silk-screened JWJ9J, the actual model is JW7726B, which is a synchronous rectifier controller, which supports ACF active clamping, DCM, QR quasi-resonance and CCM flyback, and has the ability to quickly shut down. Supports both high-side and low-side applications with low standby current. During start-up (before the VCC is established), the gate gate is effectively prevented from being coupled to the turn-on voltage. It is understood that at present, the cumulative shipment of JW7726 series products has approached 10 million.
Jewalt JW7726B Profile Information.
The synchronous rectifier tube is from Wanguo Semiconductor, model AONS66947, NMOS, withstand voltage 100V, conduction resistance 29M, in DFN5*6 package.
The heat sink for the synchronous rectifier tube is welded and fixed.
The two filter capacitors are from Emerald and are rated at 1000 F25V.
Close-up of the USB-C interface board, the front side is soldered with the USB-C female connector and VBUS switch tube.
The back side is soldered with a protocol chip, a current sampling resistor, a TVS diode, and a thermistor.
The protocol chip adopts Yingjixin IP2723T, which has passed the USB IF Association PD30 PPS certification, TID: 3135, is a multi-protocol integrated fast charging protocol IC for USB output port. It supports a variety of fast charging protocols, including USB TypeC DFP and PD20/3.0、pps 、hvdcp qc4、qc4+、qc3.0/2.0、fcp、scp、afc、mtk pe+ 2.0/1.1、apple 2.4a、bc1.2 as well as Samsung 20a。
The IP2723T can provide a complete Type-C solution for unidirectional output applications such as adapters and car chargers. In addition, IP2723T has a high level of integration and rich functions, and only requires very few peripheral components for application, effectively reducing the size of the overall solution and reducing the BOM cost.
Yingjixin IP2723T data information.
The charging head network dismantled and learned that Yingjixin IP2723T has been used by many brands such as Flashmo, Momis, REMAX, Maiduoduo, Hua Kelong and other brands of 20W chargers, and has also been used by Momax 65W 2C1A GaN fast charging charger, Nubia 65W USB PD GaN charger, Nubia 1A1C 45W Deuterium Front GaN fast charger and other GaN chargers, in addition, Yingjixin fast charging chips can also be used in various charging fields such as car charging, mobile power supply, adapters, etc., and are used by XiaomiMore than 100 products from well-known brands such as Huawei, Samsung, and Tesla are used.
The output VBUS switch is from Weizhao Semiconductor, model VS3698AE, NMOS, withstand voltage 30V, conduction resistance 3M, PDF N3333 package.
VPong VS3698AE details.
The USB-C receptacle is fixed by via soldering, and the orange rubber core does not expose copper.
A list of all dismantling and a family photo.
The Infinix GaN charger is designed with a white case and European fixed pins. The charger is equipped with a single USB-C port and supports 20V9A 180W private fast charging, with 100W PD fast charging and 33-21V5A PPS fast charging, which has good fast charging compatibility for Android phones and laptop charging.
Through the dismantling of the charging head network, it was learned that this gallium nitride charger adopts PFC+ flyback architecture, uses Silergy Giant SY5072B PFC controller and Renesas IW9801 ZVS flyback controller, uses two Innoscience INN650D150A gallium nitride switch tubes, and uses JW7726B synchronous rectifier controller with IWS 66947 synchronous rectifier tube.
The protocol chip adopts Yingjixin IP2723T, and the output voltage feedback is carried out through the optocoupler. The charger is equipped with a pure copper heat sink inside to dissipate heat from the PFC boost inductor and the GaN switch. The internal electrolytic capacitor comes from Aihua, the filtered solid-state capacitor comes from Emerald, and the internal components are glued and fixed, and the workmanship materials are solid and reliable.