With the rapid popularization of PD fast charging, more and more devices use the Type-C interface. Some DC chargers with a long designed service life have gradually gone. The feeling of abandonment without taste “. In addition to understanding technology, it is another important way to solve the above problems.

Recently, the charging head network got DELL Dell a DC To USB-C connection. As long as it is connected, the DC charger supports PD2.0 fast charging output. The maximum output power can also reach the current mainstream 20V3.25A 65W. , Let the DC charger that may be thrown away or ash glower again. The following charging head network disassembles this rotor to see how it is done.

1. DC To USB-C rotary connector appearance

A short data cable of the entire avatar, the overall black, with parameter labels on the line body.

Product parameter close -up

Model: LDD45B-USBC160

DC input: 19.5V3.34A

DC output: 5V/20V 1.5A/3.25A

The product has passed CE, TUV, GS and UL certification.

The input terminal of the transfer is the DC mother.

The USB-C end has a power-powered indicator.

Gongtou close -up, full PIN design.

The total length of the rotor head is about 17cm.

The weight is about 18g.

The Dell’s rotor needs to be used with a 7.4mm connector.

Connect the connection to the DC charger and read the fast charge protocol with ChargerLab’s Power-Z KT002. The actual measurement only supports the PD2.0 fast charge protocol.

Read the PDO packet of the charger and support two fixed output gears of 5V1.5A and 20V3.25A.

Use it to charge Apple MacBook Pro 16 with a measured power of 19.32V 3.24A 62.69W.

Second, DC To USB-C rotary joint disassembly

Remove the DC into the end of the end.

The internal PCB small board wraps the heat sink, the buckle on both sides and paste the tape are fixed.

Remove the heat sink and paste the tape insulation in the inside.

There is a synchronous antihypertensive converter and four MOS tubes on one side.

There is a protocol chip and inductance on the other side.

DC input the close -up of the parent seat, sinking board treatment.

Silk -printed BPP66m diode.

TI Texas Instrument TPS54335A synchronous antihypertensive converter supports 4.5-28V wide range voltage input, and 3A continuous output current, built-in switching tube, 50kHz-1.5MHz operating frequency can be adjusted, using (SO) PowerPad ™ packaging. Used for 5V antihypertensive.

The four MOS tubes are from Toshiba. One model is TPN11003NL, with 30V resistance. A model is TPCC8103, with 30V resistance. There are two other TPCC8105, which is also 30V with pressure resistance. The four MOS pipes are used for 5V and 20V output switching.

3R3 alloy inductor close -up.

Sedication DPD003 protocol chip.

The other shell is also disassembled, and steel cases are used inside.

PCB small board and line core injection protection.

There are indicators on both sides of the small board and covered with light guide plastic.

A list of the other side.

The indicator is specially written.

After all the disassembly was dismantled, come to Zhang Quanjia portrait.

Summary of charging head network disassembly

Dell’s DC TO USB-C transfer is only about 17cm long. It is convenient to use and cannot solve the user’s length requirements. In addition, it can only be used with a 7.4mm DC header. The core point of the product is to allow the old DC charger to use the residual heat and support PD fast charging. It has two sets of voltage gears of 5V1.5A and 20V3.25A. It can be used to charge mobile phones, tablets, and laptops.

The charging head network was disassembled and found that the core pressure regulating circuit of the rotor was located on the small board inside the DC input. Output. There is no important device at the other end, and there are no important devices, mainly with LED indicators, small board and wire core injection protection.