After the release of Apple's iPhone 13 new machine, due to the upper limit of charging power of some models increased to 27W, due to the needs of a large number of new machine users, the 30W mini charging market is on fire, so TORRAS Tulas launched a 30W Xiaoice charger, giving consumers one more choice.
The charging head network learned that the reason why this charger is so compact is that it uses gallium nitride technology, which is called black technology, and the core solution is to use the SC3021D+SC3503 of Nanxin Semiconductor. Let's take a detailed disassembly of this charger to see how it is designed internally.
Previously, the charging head network also disassembled the Tulas mini 20W PD fast charge charger, Tulas 65W 2C1A multi-port fast charging desktop socket and other products, welcome to check.
First, Tulas mini 30W gallium nitride fast charging appearance
The overall box is orange tone, and the front is printed with the product name - Tulas Xiaoice charger, which is very conspicuous.
Product parameter information is printed on the back.
The package contains a charger, instruction manual and cartoon card.
The charger adopts the far peak blue color scheme, the waist shell is frosted, the top surface is highlighted, and the corners are transition rounded.
The front of the fuselage is printed with the TORRAS brand logo.
The charger is equipped with a fixed GB pin.
Charger parameters are printed on the input housing
Model: CDRA34A
Input: 100-240V~50/60HZ 1A
Output: 5V3A, 9V3A, 15V2A, 20V1.5A
Maximum output power: 30W
Brand owner: Shenzhen Tulas Technology Co., Ltd
Manufacturer: Shenzhen Kunxing Technology Co., Ltd
The charger has been certified by CCC and Class VI energy efficiency.
There is a single USB-C interface in the center of the top surface, and the orange-red rubber core.
The measured charger body height was 39.23mm.
The width is 34.35mm.
The thickness is 36.9mm.
Compared with Apple's 30W charger, the volume advantage is obvious.
Intuitive feeling of the charger in your hand.
The net weight is about 60g.
Using the Chargelab POWER-Z KT002, the USB-C port only supports the PD3.0 fast charging protocol.
In addition, the PDO message shows that the C port has four fixed voltage gears of 5V3A, 9V3A, 15V2A, and 20V1.5A.
Second, Tulas mini 30W gallium nitride fast charging and disassembly
Remove the housing, have an isolation plate at the input and glue it.
The module consists of three small plates welded vertically to each other, and the structure is very stable.
Devices such as transformers and capacitors are glued and reinforced, and there is also isolation plate insulation between the output panels.
The bottom panel has a thermal pad on the back.
The measured module length was 35.2mm.
The width is 25.36mm.
The thickness is 31.15mm.
The module is split, and the motherboard is equipped with input and output filter capacitors, I-inductors, main control chip power supply capacitors, transformers and other devices.
On the secondary side of the board, there is also a synchronous rectifier controller and a rectifier tube.
The back of the motherboard is equipped with a switching power supply master chip, gallium nitride power tube, optocoupler, and chip Y capacitor.
The side panels feature a delay fuse, common-mode inductance, and NTC surge suppression resistors on the front.
There is a fairing bridge on the back.
The delay fuse comes from Dongguan Beite Electronic Technology Co., Ltd., 2A 250V.
The common mode inductor is two-wire wound and the bottom is also insulated with a small plate for filtering out EMI interference.
NTC surge suppression resistor close-up for suppressing uprush current.
The rectifier bridge adopts the WRAPS20M of Shenzhen Wald Industrial Co., Ltd., which can reduce the diode junction capacitance to achieve very little harmonic oscillation through the softer recovery curve and smoother shutdown characteristics.
Wald WRABS20M profile information.
Charging head network disassembly learned that Wold's soft bridge is also used by Momix 100W 2A2C gallium nitride fast charger, Nubia 1A1C 45W deuterium gallium nitride fast charger, bull 65W PD fast charger, Maddodo 2C1A 65W gallium nitride charger, Hongdashun 65W gallium nitride charger, OPPO 50W biscuit gallium nitride fast charge, ROCK 65W gallium nitride charger and other fast charging products, product performance has been unanimously recognized by customers.
I-beam inductive jacket insulated tube.
Two high voltage filter electrolytic capacitors from Emerald are both 400V 27μF.
Close-up of the main control chip power supply capacitor, the specification is 50V 10μF.
The main control chip of switching power supply is Nanxin SC3021D, which supports 170KHz GaN direct drive, and is designed for chargers such as 30W gallium nitride without X-Cap discharge function, and ATQ17/15 winding transformer can be used in this scheme, which is very cost-effective.
It is understood that nanxin SC3021x to meet all kinds of high-frequency QR fast charging needs, the use of proprietary GaN direct drive design, eliminating the external driver or discrete drive parts; integrated segmented power supply mode, single-winding power supply, no need for complex power supply circuit; built-in high-voltage start and AC input Brown In/Out function, of which SC3021C integrated X-cap discharge function.
Charging head network disassembly learned that the South Core fast charging chip can be applied to the charger, car charging, mobile power supply, energy storage power supply and other products, has been anker PowerHouse II 400 outdoor power supply, Yubo 300W portable energy storage power supply, Samsung 45W PD fast charging car charging, Zimi 20 No. 200W PD fast charging mobile power supply, Zimi 65W 2C1A desktop PD fast charging, Anker Nano 20W PD fast charger and dozens of other products, the quality has been highly recognized by customers.
Gallium nitride power chip using Innoseco INN650DA04, withstand voltage 650V, conductivity 480mΩ (max), with high frequency and high efficiency, very low loss, fast active heat dissipation and other characteristics, while using DFN5 * 6 package, to achieve small size, high efficiency charger design.
Infonotic INN650DA04.
INN650DA04 is the second generation of innoGaN series of new products, has been Gushi Technology mini 30W gallium nitride fast charge, Kexun mini 33W fast charge gallium nitride, REMAX 30W gallium nitride fast charge, Nubia 30W gallium nitride sugar cube fast charge, Ruiyuan Industrial 33W 1A1C gallium nitride fast charge and dozens of other 30W fast charging products, chip quality has been recognized by the market.
Transformer close-up.
EL 1019 optocoupler for primary secondary communication, feedback output voltage.
The CHIP Y capacitor comes from Sichuan Terry Xiang Technology Co., Ltd., which has the characteristics of small size and light weight, which is very suitable for high-density power products such as gallium nitride fast charging.
Terry Xiang focuses on the research and development, production and sales of passive components, with a registered capital of 100 million yuan. There are two types of independent capacitor brands: SMD TRX and DIP TY capacitors, TRX will be committed to the research of ceramic materials, in order to expand the application of more categories, to provide customers with more solutions.
The charging head network learned that in addition to being used by dozens of fast charging products of Brands such as Belkin, Anker, QCY, Shengli, Maddo, OPPO, Lenovo, Nubia, Beth, Hailutong, First Guard, etc., in addition to being used by Igor 40W LED drive power supply, Changhong 42-inch intelligent network TV 42P3F built-in power supply, Zhuo Feihang 45W Gallium nitride ultra-fast wall charging and other products, the performance has been unanimously recognized by customers.
Synchronous rectifier controller using Nanxin Semiconductor SC3503, which is an adaptive turn-on detection and fast shutdown synchronous rectifier controller, no need for auxiliary coil power supply, output voltage can be as low as 0V, patented adaptive opening detection circuit to avoid synchronous rectifier mis-opening, compatible with a variety of MOS, with ultra-low quiescent current, support a variety of operating modes, support high-side and low-side synchronous rectification, peripheral components are very streamlined. Available in SOT23 package, it is suitable for wide range flyback adapter applications.
Nanxin SC3503 data information.
The charging head network disassembly learned that the chip has been adopted by Greenlink 65W Gallium Nitride Fast Charge Socket, Weiyuan New Energy 30W 1A1C Gallium Nitride Fast Charge, Gushi Technology Mini 30W Gallium Nitride Fast Charge, Kexun Mini 33W Gallium Nitride Fast Charge, Image 65W Gallium Nitride Charger, Nubia 30W Gallium Nitride Fast Charge, Hua Kesheng 65W 2C1A Gallium Nitride Fast Charge Charger.
The synchronous rectifier tube adopts CHINA RESOURCES micro SM080N10L2, NMOS, withstand voltage 100V, DFN5x6 package.
Output filtered solid capacitor close-up with 25V 680μF.
The output-filtered solid capacitor, protocol chip, and output VBUS switch tube are available on the output panelette.
The second output filtered solid capacitor is from Emerald and is 25V 100μF.
The protocol chip is from Infineon, model CYPD3172PB.
Close-up of the output VBUS switch tube, silk screen 3406.
USB-C female close-up.
All disassembled, let's take a family portrait.
Charging head net disassembly summary
Turas' 30W Gallium Nitride Mini Filler corner transition rounding, using hands-free. The fuselage is very small, coupled with the use of far peak blue color, the overall is also good-looking. The charger supports pure PD3.0 fast charging protocol, with 5V3A, 9V3A, 15V2A, 20V1.5A four sets of voltage gears, not only perfectly adapted to iPhone 13 series mobile phones, has good compatibility with devices that support PD fast charging.
Through disassembly, the charger uses three small PCB boards to weld each other vertically, and the structure is very stable. Using Nanxin SC3021D+SC3503 high-frequency QR switching power supply scheme, Innosyco INN650DA04 second-generation gallium nitride power device, this program has been mass-produced and applied to many large brands of mini charging products, performance and quality have been verified by the market, and customers have unanimously recognized.