Recently, the charging head network has obtained a two-in-one laptop fast charging mobile power supply from the well-known manufacturer Dell. This product design is very novel. The so-called two-in-one mobile power supply is actually made up of two independent modules, the charger and the mobile power supply. According to different scenarios, you can choose to separate or splice it, which is very flexible and convenient to use.
Dell This two-in-one mobile power supply has 43Wh energy and 45W fast charging power, and is equipped with a USB-A interface, which can charge mobile phones, laptops and other devices. The charging head network below will disassemble this product in detail, let’s take a look at its specific design and workmanship.
, Dell 2-in-1 mobile power supply appearance
The front of the packaging box is designed with DELL logo and product appearance diagram, which looks very simple. There are three usage scenarios of the product printed on the side of
. You can use the 45W power module to connect the output cable to power the notebook, or you can use the mobile power supply to power the notebook and the mobile phone, or you can use the 45W power supply to power the mobile phone and the notebook at the same time when connecting the 45W power supply.
The other side is printed with a wire head and the end of the product body.
product is fixed in the box groove, with small grooves on both sides for easy removal.
package contains mobile power supply, power cord, large and small round-end cables, and instruction manuals.
Dell's two-in-one mobile power supply continues the brand's classic flat and round design. The outer shell of the mobile power supply is made of aluminum alloy, with sandblasted surface and a DELL brand logo on the front, with a very simple style.
The nameplate stickers for the corresponding charger and mobile power supply are respectively pasted on the back of the body.
charger parameters close-up:
Model: LA45NM170
Input: 100-240V~50/60HZ 1.3A
Output: 19.5V2.31A
Charger has passed CCC, EAC, CE, UL, CP, KC, GS, NOM, PSE, NYCE and other safety certification and VI energy efficiency certification. Like Dell's other power supplies, it can be used in most countries and regions around the world.
Close-up of mobile power parameters:
DELL PH45W17-BA 43Wh Mobile power supply
Model: SMP43PH170
Input: 19.5V2.31A
Output: 19.5V2.3A (2040mAh), 5V2.1A (8144mAh)
Lithium battery capacity: 14. 8Vdc, 3100mAh
Operating energy consumption: 21.14Wh
Standby energy consumption: 0.39Wh
Charging limit voltage: 16.8V
Mobile power supply has passed TUV, GS, PSE, UL, KC, and CE certification.
charger input end is equipped with a triple plum blossom AC input interface. The other end of
has a power button, LED indicator light, USB-A interface and a custom laptop charging cable connection socket.
There are snap-press plates on both sides of
, and press them to separate the two modules. Close-up on the other side of
.
Dell's two-in-one mobile power supply adopts modular design , which is spliced by two major modules of charger and mobile power supply. It is a truly literal two-in-one product, which is also the reason why there are many usage scenarios on the packaging box.
can flexibly use this product according to different scenarios such as daily working from home, shopping, and business trips in other places. This is also an advantage that many integrated two-in-one mobile power supply on the market do not have, and it is very flexible to use.
charger module and mobile power module are connected through custom connectors.
There are CP, EAC, FCC, and VCCI certification information in the groove of the mobile power supply.
measured the body length to be about 17.5cm.
width is 78mm.
thickness is 22.4mm.
Dell's two-in-one mobile power supply has an overall weight of about 426g.
Charger module weight is about 106g.
mobile power module weighs about 320g.
The USB-A port supports Samsung 5V2A and DCP protocols using ChargerLAB POWER-Z KT002.
measured no-load voltage of the customized socket is 19.7V, which is nominal to 19.5V.
uses AC input to charge Dell's mobile power bank, and the input power is measured to be 25.43W.
LED indicator light on white.
charges the mobile power supply, and at the same time uses the USB-A port of the mobile power supply to power the device. The input power is measured to be 37.76W and the output power is 9.64W.
2. Dell 2-in-1 mobile power disassembly
Remove the mobile power supply metal shell, and use a plastic shell to insulated to protect the battery cell.
splits the plastic shell, there are four batteries in total, and there are two PCB boards .
Both ends of the battery are glued, and the connecting wire of the connector is insulated tube.
On the other side, the nickel tape is connected to the nickel tape wrapped in insulating tape . The junction with the nickel tape on the battery is protected by insulating paper .
battery close-up, silk-print LGDBMH11865, from LG, 3200mAh capacity, 18650 lithium battery power cell, large capacity and high current.
battery pack and PCB board are connected through cable plug-in and unplugged, making it easy to assemble.
Insulating paper is pasted on one end and on both sides of the battery pack. A battery protection circuit board is fixed on the other end of
, and a thermistor is soldered to monitor the temperature of the battery.
Solder the output wire and thermistor on the battery protection board.
battery fuse screen printing 12AJ4W, two protective tubes are used to use Toshiba TPC8073, with a voltage resistance of 30V.
thermistor close-up, head glue helps fix.
There are two PCB boards in the mobile power supply, and they are connected between them through the pins and on both sides.
Separate the two boards.
Both boards are blue, one deep and one shallow, and there are few devices on the back of the two boards.
The front of the board has MOS, inductor, connection motherboard, etc.
There is a large chip on the back of the dark blue small board.
TI Texas Instruments MSP430G2755 Mixed Signal Microcontroller , used for the control and protection functions of the whole mobile power supply machine.
TI TPS70933 linear voltage regulator, powering the main control microcontroller.
The other side of the small board is listed, with filter capacitors, battery charging controllers, multiple MOS tubes and inductors.
Toshiba TPCA8103, PMOS, used for circuit switching and protection functions. Close-up of filter capacitors, Panasonic SVPF series solid-state capacitors, specifications of 25V 56μF.
TI BQ24777 battery charging controller.
Two MOS tubes comes from Toshiba , TPN8R903NL, used for synchronous rectification boost.
Two Toshiba TPC8073 MOS tubes are used for protection and isolation.
LED indicator close-up, the orange status indicator and white battery indicator share the same position on the left.
There is a synchronous boost controller on the back of another small board. On the silk screen printed on the board, you can see that this product is quite old.
Synchronous boost controller uses TI TPS43061 to boost the built-in battery to power the notebook.
The other side of the small board is a list of the USB-A port output buck circuit on the left, and the laptop boost output circuit on the right, and the mother seat is covered with yellow dust-proof tape.
Synchronous boost MOS tube uses two Toshiba TPH8R903NL, with a voltage withstand 30V.
filter capacitor close-up, Panasonic SVPF, specification is 25V 56μF.
Another capacitor close-up, two are exactly the same.
filter inductance close-up.
MPS silk screen AFJG069, USB-A port buck output converter.
TI TPS2546 USB charging port controller, used for USB-A port output overcurrent protection.
output protection tube uses Toshiba TPCA8103.
filter inductance close-up.
USB-A mother seat close-up.
Remove the charger module body shell, cover the back of the PCB board with heat sink, the heat sink is pasted with black insulating paper, and sticky tape to fix it. The front of the PCB board is also covered with a heat sink.
Remove the heat sink and a lump of white glue is applied to the center of the front of the board to help the device fix the heat conduction.
Clean the silicone, and the transformer is in the center. There are two small heat sinks in the lower left corner of the L-shaped heat sink.
From the word LITEON printed on the board, we can learn that the charger is manufactured by the well-known manufacturer Guangbao .
Take out the small heat sink, and below is an rectifier bridge . The high-voltage filter electrolytic capacitor on the right comes from Kingsoft, which is placed horizontally and wrapped in insulating tape, with a specification of 400V and 82μF. At a glance at the back of the
PCB board, there is an switching power supply main control chip, with obvious primary demarcation.
delay fuse close-up, specification is 3.15A 250V.
common mode inductor wrapped in insulation tape, with information labels on the side.
There is a rectifier bridge and a small capacitor on the right side of the inductor, and a close-up of the rectifier bridge.
Charger switch power supply main control chip close-up, silk screen 400BAHAB0.
primary switch MOS tube comes from Infineon , IPI65R190C6, NMOS, withstand voltage 700V, and resistance 0.19Ω.
008 optocoupler, used for primary secondary communication and feedback output voltage.
Synchronous Rectification Controller comes from MPS, MP6907, supports a wide output voltage range of 4.2-35V. Close-up of
Synchronous Rectifier Tube, ON Semi FDMS86202, withstand voltage 120V, resistance 7.2mΩ.
filtered solid-state capacitors adopt Wanyu ULR series, with specifications of 25V 470μF.
has been disassembled, let’s take a family photo.
Charging head network disassembly summary
Dell's two-in-one laptop mobile power bank is a particularly practical mobile power bank that increases battery life for the laptop, and supports USB 5V and 19V power supply dedicated to computers. The unique dual-module design also makes the use of the product quite flexible, greatly facilitating daily use scenarios. However, with the popularity of USB PD mobile power supply and supporting cables, and USB-C charging on laptops, such specialized devices have also lost the market. Through disassembly, it was found that the production date of this product can be traced back to 2016, and it has been 5 years since then. Looking at this product in the context of the rapid development of fast charging market today, it is not an exaggeration to say "old antique". But even so, its unique dual-module independent design ID is worth learning from.
mobile power supply has four LG 18650 power batteries built-in, using TI's main control microcontroller, battery charging chip and boost controller, USB-A port buck output is MPS solution, Panasonic filter capacitor, and the charger is manufactured by Guangbao.The materials used in the products are from well-known manufacturers such as Zhili LG, TI, MPS, Infineon, Panasonic, etc. The materials are luxurious and reliable in quality, which meets the identity of the big brand of DELL.
