Recently, the charging head network got a 40W power adapter from the well-known Korean brand LG, but it is still the familiar "MADE IN CHINA", and the manufacturer is Shenzhen Oulutong Electronics Co., Ltd. The company's products are widely used in office electronics, network communications, security monitoring, audio, financial POS terminals, PoE adapters and other fields.
The following charging head network will disassemble this product in detail to see how the material used for this adapter produced by Continental for LG works.
It is worth mentioning that the HP 65W USB PD fast charger that has been disassembled before the charging head network, the LG laptop standard 65W gallium nitride charger is also from the hand of Eurocomm, welcome to check it out.
First, the appearance of LG 40W adapter
The adapter is a classic black design with a frosted casing and a DC round head output cable.
The input has a plum socket with a ground pin.
There is a nameplate on the bottom of the fuselage, and the relevant parameters are as follows:
Model: ADS-45SN-19-3
Input: 100-240V 50/60Hz 1.2A
Output: 19V2.1A
Manufacturer: Shenzhen Oulutong Electronics Co., Ltd
The adapter has passed CCC, CP, CE, KC, PSE, GS, NOM, EAC, UL, etc., and has also passed the VI energy efficiency certification.
The fuselage and output cable connections are bent.
DC round head 90° bend design, easy to plug and unplug.
The measured length of the fuselage is 95.75mm.
The width is 44.94mm.
The thickness is 31.39mm.
The output cable length is approximately 121cm.
Intuitive feeling in the hand.
The weight is about 190g.
Second, LG 40W adapter disassembly
The fuselage shell is disassembled and the internal module and housing are filled with vinyl for heat conductivity.
The measured module length was 92.8mm.
The width is 38.62mm.
The thickness is 24.07mm.
The back of the PCB board is supported by a rubber pad.
The front is covered with an isolation panel and a metal heat sink.
Remove the heatsink, you can see a ground wire across the primary stage, and set with insulating pipe protection, capacitors and other devices to glue.
Heat sinks are fixed on both sides of the module, and the rectifier bridge, primary switch MOS tube and rectifier tube are screwed to fix the heat dissipation.
Remove the heatsink, and the input is equipped with a delay fuse, varistors, NTC surge suppression resistors, safety X capacitors, common mode inductors, and other devices, and the common mode inductors are wrapped in insulating tape. In addition, a high-voltage filter electrolytic capacitor is placed laterally in the middle area.
There is an optocoupler and a master chip power supply capacitor between the high voltage filter electrolytic capacitor and the transformer.
On the other side are also the rectifier bridge and the primary switch MOS tube.
The delay fuse specification is 3.15A 250V.
Close-up of the TVR10621V varistor for input overvoltage protection.
NTC surge suppression resistors are used to suppress the upwelling inrush current.
Safety X capacitor close-up.
Close-up of common-mode inductors for filtering out EMI interference.
Close-up of UG3KB80T rectifier bridge.
The high voltage filter electrolytic capacitor is from Guankun and has a specification of 400V 82μF.
The main control chip power supply capacitor is also from Guankun, with a specification of 50V 5.6μF.
Switching power supply PWM controller close-up, Onborn OB2362, is a high-performance adaptive multi-mode flyback controller that supports CCM and QR operating modes.
The primary switch MOS tube adopts AOS Bandai AOTF10N65, NMOS tube, withstand voltage 650V, and adopts TO-220F package.
Close-up of the color ring resistance.
Transformer close-up.
EL 817 optocoupler for output voltage feedback.
Blue Y capacitor close-up.
At a glance at the output, there are rectified Schottky diodes, filter capacitors, filter inductors and other devices, and the wire sleeve is protected by a rubber sleeve.
Close-up of Schottky diode, silk screen 30T120CT.
The output filter electrolytic capacitor is also from Guankun and has a specification of 25V 680μF.
Close-up of the output filter inductor.
Ceramic capacitor close-up.
All disassembled, let's take a family portrait.
Charging head net disassembly summary
LG this 40W power adapter supports 100-240V wide range voltage input, and has passed CCC, CP, CE, KC, PSE, GS, NOM, EAC, UL and other multinational / regional safety certification, product quality is reliable, and also reflects the good strength of Oulutong in the field of power supply.
The charging head network learned through disassembly that the power supply module covers the metal heat sink plate, in addition to the rectifier bridge, primary switch MOS tube, rectifier tube equipped with a special heat sink, and the use of screws to fix the heat dissipation. The rectified output is performed using a Schottky diode, and the filter capacitors are all from Guankun. Overall, this power supply is full of traditional laptop adapter atmosphere from the inside out.