In recent years, the state has encouraged the public to buy new energy vehicles, and introduced corresponding subsidies, exempt from the number of policies, coupled with the lower cost of new energy vehicles, the quietness and comfort of cars in the power mode are also better, and more and more people are beginning to accept such new cars.
Since electricity is fundamental to this type of car, its systems are also very intelligent. Take Tesla Tesla's Model Y as an example, equipped with a large touch display, all vehicle functions are displayed centrally, and support voice interaction, games and other rich functions. In addition, it is also equipped with a USB interface, and the owner can plug in the cable / U disk to achieve fast charging and data transmission, which is very convenient.
As tesla's official website introduces, the Model Y has two USB-C ports in the front and rear, and the two C ports in the front row are located in the armrest box.
The two USB-port close-ups in the back row, and the close-up pictures of the interface are all real shots of the Tesla Model Y car of the charging head network.
However, the charging head network learned that in the context of global lack of cores, Tesla Model 3/Y such pure electric vehicles are particularly affected, after November 6, 2021 in the "missing core" situation production of Model 3 / Y, front and rear USB-C interface data function cut off, only retain the power supply function.
Recently, the charging head network has obtained the Tesla Model Y in-car USB-C fast charging module produced in the case of "lack of core", let's take a look.
First, unboxing experience
The module adopts a green PCB board design, and the shielding cover is particularly conspicuous.
By comparing the spacing between the two C ports, it can be found that the module is the fast-charging module built into the Tesla Model Y front handbox.
First of all, the maximum length of the PCB board was measured to be 76.86mm.
The width is 59.93mm.
The thickness is 8.8mm.
The weight is about 28g.
In addition, in the analog DC 24V environment, the USB-C port measured by using the Chargelab POWER-Z KT002 supports the PD3.0 fast charging protocol.
And with 5V3A, 9V3A, 12V3A three sets of fixed voltage gears, supporting the maximum 36W PD fast charge output.
The other C port also only supports the PD3.0 fast charging protocol.
In addition, it also has three fixed voltage levels of 5V3A, 9V3A and 12V3A. That is, two C ports support power blind plug, easy to use.
When testing the PDO when the two-port output is simultaneous, one of the tables shows that it supports 5V3A and 9V3A gears, and the other table does not show it, which shows that it still follows the common two-port output buck strategy.
Charging apple's iPhone 13 Pro Max, the power measured with the ChargerLAB POWER-Z KM002C is 8.86V 2.94A 26W.
Charging the Apple iPad, the charging power measured was 11.94V 2.65A 31.63W.
Charging the Apple MacBook, the measured charging power is 11.87V 2.21A 26.23W.
Second, disassembly and analysis
Through wiring tests, it was found that the two C ports only support PD3.0 fast charging protocol, with 5V3A, 9V3A, 12V3A three sets of voltage gears, can be very compatible with Apple's iPhone, iPad and MacBook and other devices that support PD fast charging protocol.
Let's take a look at the specific circuit design on the board, and take you to understand the actual situation of the Model Y front-row fast charging module that cuts off the data function.
At a glance on the front of the PCB board, the most obvious is that there is a data transmission circuit pad reserved in the center but no soldering any device, and there is a six-pin ESD chip next to the two USB-C mother seats, and the bottom has a filter inductor and a MOS tube to control the power supply.
The empty pad is used for USB data transmission, where the middle chip slot is responsible for the data transfer of the two USB-C ports, the chip slot in the lower left corner is used for wireless connection function, and the device corresponding to the USB interface is also not discharged.
The edges are also printed with the Tesla brand logo.
At a glance on the back of the board, the buck circuit covers the shielding cover, and the top left corner is pasted with foam.
Inside the shield is a step-down circuit of the car charging module.
Two KEMET automotive grade high temperature resistant polymer tantalum capacitors for input filtering, 33μF 35V, AEC-Q200 certified.
The MPS MPQ4272 dual synchronous buck converter for the two C-port buck outputs of the module. The MPQ4272 supports a maximum 36V input voltage and up to 3A of load current per output, enabling a 60W dual output power solution. In addition, telemetry is provided for voltage, current and temperature monitoring, which is characterized by high efficiency, low power consumption, and low temperature rise.
There are also two 4R7 buck inductors in the shield area, which are dual-way buck with MPS MPQ4272.
A close-up of another 4R7 buck inductor.
Using two MPS MPQ5031 protocol chips to control the output voltage of two C ports, this is a PD controller, which can support QC3.0/PD3.0/BC1.2/Apple divider and other charging protocols, built-in VBUS switch tube, support NTC thermistor to monitor temperature.
Another MPS MPQ5031 protocol chip close-up.
Silk screen printed MOS tube of 4401.
Close-up of the 2R2 filter inductor.
On the other side there is also a 2R2 filter inductor.
Close-up of the six-pin ESD chip next to the connector for ESD protection of the USB data pins.
A close-up of another six-legged chip.
USB-C female close-up, via welded fixed.
Another close-up of the female seat, with the word L1306 on the metal casing.
All disassembled.
Charging head net summary
As a front-loading charge for Tesla electric vehicles, the charging material for this car is quite good. The input uses KEMET automotive grade high-voltage polymer capacitors with multiple MLCC filters in 1210 and 1206 packages, and uses a full set of MPS automotive grade chips for buck and protocol control.
MPQ4272 as a dual independent synchronous buck converter, with two MPQ5031 for independent interface control, to achieve dual independent output, support maximum 36W PD fast charge, can be blindly plugged and used, very convenient.
The epidemic not only threatens the safety of the public, but also affects the production activities of all walks of life, even Tesla can not avoid, the current Model 3/Y car with the USB-C module has not been able to have the same fast charging and data transmission functions as before, it is indeed a little regret.
However, some car companies in order to attract consumers, the launch of the first delivery of vehicles, follow-up goods to support the recall and installation strategy, so there are just needed small partners in the car purchase can be compared to see.