Preface
The charging head network got a power adapter with a USB-C interface from HP, this adapter model is TPN-LA24, which supports a wide voltage input of 100-240Vac, with an output power of 30W and a maximum output voltage of 15V. The adapter is equipped with foldable GB pins and comes with a 1.8m output cable, which is manufactured by LITE-ON Electronics.
This charger supports PD3.0 fast charging, and also has three sets of PPS voltage ranges of 3.3-5.9V3A, 3.3-11V3A, and 3.3-16V2A, which can not only charge laptops, but also have good fast charging compatibility for Android phones. Let's bring a dismantling of HP's 30W power adapter, and take a look at the internal solutions and materials.
HP 30W Power Adapter Appearance
The HP 30W power adapter is a classic black color scheme, with its own USB-C cable, the body is designed in a square shape, and the main body of the shell is frosted.
The center of the front and back of the fuselage is designed with a shiny background and contrasting colors of the HP brand.
The side of the fuselage is printed with the power adapter parameter information.
Close-up of power adapter parameters
Model: TPN-LA24
输入：100-240V~50/60Hz 1A
输出:5V3A、9V3A、12V2.5A、15V2A
Manufacturer: Lite-On Technology Co., Ltd
The adapters are CCC certified, as well as certified for energy efficiency level VI.
The power adapter is equipped with foldable GB prongs, making this product more convenient to carry.
The output cable is designed with anti-bending protection.
The USB-C terminal housing is matte for easy plugging and unplugging.
The measured height of the HP 30W power adapter is 48.8mm.
The width is 48.86mm.
The thickness is 29.55mm.
The length of the USB-C cable is about 177cm.
Compared with Apple's 30W charger, HP's body is a little smaller.
The size of the adapter body in the hand is intuitively felt.
In addition, the overall weight of HP's power adapter is about 163g.
使用ChargerLAB POWER-Z KM003C测得USB-C口支持PD3.0、PPS、QC4、DCP充电协议。
PDO报文显示USB-C口还具备5V3A、9V3A、12V2.5A、15V2A四组固定电压档位,以及3.3-5.9V3A、3.3-11V3A、3.3-16V2A三组PPS电压档位。
HP 30W Power Adapter Teardown
After reading the appearance and test of HP's power adapter, let's disassemble it and take a look at the internal scheme and materials.
First, the adapter housing is disassembled along the seam of the housing, which is fixed by ultrasonic welding.
The internal PCBA module is fixed by gluing.
The output cables are connected via plug-in pieces for easy assembly and replacement.
Remove the PCBA module from the housing and fix the sides by glue.
The back of the PCBA module is provided with a heat sink, which is fixed by soldering.
The small board is welded on the side of the PCBA module, and the transformer is welded to the small board connection.
The folding pins are connected by wire welding, and the wire is cold-pressed with terminals, and the jacket is insulated with heat shrink tubing.
The length of the PCBA module measured by vernier calipers is about 44.2mm.
The width of the PCBA module is about 44.6mm.
The thickness of the PCBA module is about 25.6mm.
The front of the PCBA module is at a glance, the upper right corner is welded with a fuse, the common mode inductor, the top middle position is welded with a safety X2 capacitor, and the second common mode inductor is welded in the upper left corner. The high-voltage filter capacitor is welded below the safety X2 capacitor, and the bottom is the transformer and output plate.
The back of the PCBA module corresponds to the position of the primary switch tube and fills a large area.
The back of the PCBA module is welded with a rectifier bridge, a primary main control chip, a primary switch tube and a feedback optocoupler. Slotted between the primary stages and isolated by inserting an insulating board.
The protocol chip, the synchronous rectifier chip and the VBUS switch are soldered on a small board on the side of the transformer.
Through the observation of the PCBA module, it is found that this charger of HP adopts a QR switching power supply design and synchronous rectification. The output voltage is fed back by the protocol chip through the optocoupler. Let's start with the input to understand the information of each device.
The input of the PCBA module is welded with a fuse, a common mode inductor, and a transformer and a high-voltage filter capacitor are welded on the left side.
Side welding safety X2 capacitors and common mode inductors, common mode inductors wound tape insulation.
The input fuse is 2.5A 250V.
The common mode inductor is wound with enameled wire and insulated wire, and the bottom is provided with an insulating bracket.
The safety X2 capacitor is from HJC Huarong and has a specification of 0.47μF.
Another common-mode inductor is wound with tape.
整流桥型号ABS20M，规格为2A 1000V。
The specification of the high-voltage filter capacitor is 450V56μF, and the pin is insulated with heat shrinkable tubes.
The primary main control chip is silk-screened 6L=36Z and is packaged in SOT23-6.
The filter capacitor that supplies power to the main control chip is 100V and 10μF.
初级开关管来自安森美，型号FCD600N65S3R0，NMOS，耐压650V，导阻600mΩ，采用TO-252封装。
The transformer core is shielded with copper foil and insulated with a plastic frame.
Close-up of blue Y capacitor.
LITE-ON LTV1007 optocouplers are used for output voltage feedback regulation.
Paste an information sticker on the insulated plastic case.
Synchronous rectifier chip silk screen LTA1903B in SOP-8 package.
The filter capacitor is from Kingsoft, which is a UPE series solid-state capacitor with a specification of 470μF 25V.
The protocol chip adopts Weiquan WT6636F, which is a protocol chip that has passed the USB PD3.0 (PPS) certification of the USB-IF Association and has passed the Qualcomm QC4+ certification. WT6636F supports USB PD3.0 and PPS, supports line loss compensation, and supports multiple protection functions. Integrated 10-bit ADC for voltage and current detection, built-in 8051 core microcontroller, built-in discharge MOS tube.
The output VBUS switch is from IWC Semiconductor, silk screen 32308C.
Close-up of the output USB-C wiring connector.
A list of all dismantling and a family photo.
Summary of the dismantling of the charging head network
HP's 30W power adapter has a square body with a black shell and a glossy design. The adapter is equipped with foldable GB pins and comes with a 1.8 meter long output cable. The adapter supports 100-240Vac input, the output power is 30W, and the highest output voltage is 15V, which can meet the charging use of HP laptops.
Through the dismantling of the charging head network, it was learned that HP's power adapter is composed of two PCB soldering, the internal flyback architecture, the use of onsemi primary switch tube, the synchronous rectifier chip is a customized model, and the protocol chip adopts Weiquan WT6636F. The internal components of the adapter are glued and strengthened in a large area, the switch tube and rectifier bridge on the back of the PCB are glued, and the heat sink on the back side is used to strengthen the heat dissipation. The adapter is manufactured by a well-known brand of LITE-on, and the internal workmanship materials are reliable.