Before this, the charging head network introduced a set of
from Fintek Jingtuo Technology. In addition, this reference design has the USB PD fast charging protocol conversion function, which can convert the traditional QC fast charging protocol into USB PD fast charging protocol to quickly charge the mobile phone, meeting the user's needs to charge while listening to music.
Through the schematic diagram, we can see that this reference design uses a Fintek protocol IC and an audio main control IC. Among them, F75192 is the protocol identification chip provided by Jingtuo, and the conversion of the QC fast charging protocol to the USB PD protocol is realized by this chip.
Today, the editor found several phones without a 3.5mm interface to conduct a simple charging test for this audio adapter cable reference design. Let me share with you the specific test results:
1, QC protocol to PD protocol test
In the protocol conversion test, the editor randomly selected a QC3.0 charger with USB-A interface and a USB-A to USB-C charging cable. First, using
and connected to the reference design, this traditional QC fast charging charger has transformed into a USB PD fast charging protocol that can actually support the USB PD fast charging protocol and is compatible with PE fast charging.
continues to PDO detection and found that the USB PD protocol can support two voltage output gears, 5V/3A and 9V/2A, and the protocol version is USB PD3.0.
By comparing the protocol detection before and after use, we found that this reference design does support the conversion of QC protocol to USB PD protocol. As for the effect? Can I quickly charge my phone? The editor continued to conduct the following test:
2, charging comparison test
In the charging comparison test, we selected three devices: Huawei Mate10, Huawei P10 and Nintendo Switch, and tested the charging effect of this reference design before and after use.
is the first thing to look at the charging effect of Huawei Mate10. Before using the Jingtuo Smart Audio Adapter Reference Design, the QC charger can only charge the phone in 5V mode, and the charging power of is only about 8.7W.
Because Huawei Mate10 supports SUB PD fast charging, after all the reference designs of Jingtuo smart audio adapter cables were detected by ChargerLAB POWER-Z KM001C, the charging voltage of the phone rose to 9V, the charging current was about 1.76A, and the charging power of the phone was nearly 16W, and it successfully entered the USB PD fast charging mode.
At the same time, after using the Jingtuo Smart Audio Adapter Cable Reference Design, you can also adjust the volume of the phone through the volume up and down buttons on the DEMO board to achieve audio control.
The second phone tested was Huawei P10. Before using the Jingtuo Smart Audio Adapter Reference Design, the QC charger charged the phone with a charging voltage of 5.02V, a current of 1.9A, and a power of about 9.57W.
After using the Jingtuo Smart Audio Adapter Wire Reference Design, the charging voltage of the phone is 9.02V, the current is 1.83A, the charging power can reach more than 16W, and the screen of the phone is in a fast charging state (two lightning signs).
also supports normal volume adjustment of Huawei P10.
The third device is the Nintendo Switch. Before using the Jingtuo Smart Audio Adapter Reference Design, the QC charger charges the Switch with a voltage of 5.03V, current of 1.45A, and power of about 7.3W.
After using the Jingtuo Smart Audio Adapter Cable Reference Design, the charging voltage of the phone is 9.06V, the current is 1.43A, the charging power can reach more than 13W, and it is in the USB PD fast charging state.
supports Switch for volume adjustment.
or above are all test contents of using QC charger as the power supply terminal. What would happen if it were a USB PD charger? The editor chose Apple's original 18W charging to perform the same test.
Using ChargerLAB POWER-Z FL001SUPER detection found that when the USB PD charger is used as an input, the Jingtuo Smart Audio Adapter Cable reference design still supports the USB PD fast charging protocol output.
However, in PDO detection, it is shown that there is only 5V/3A of voltage output voltages.
is also Huawei Mate10. Before using the Jingtuo Smart Audio Adapter Reference Design, the charging voltage of the Apple 18W charger is 8.9V, current is 1.76A, and power is about 15.75W.
After using the Jingtuo Smart Audio Adapter Wire Reference Design, the charging voltage of the phone will be 4.82V, current will be 1.7A, and charging power will be around 8.22W.
charging head network evaluation summary
Currently, most mobile phones on the market that support USB PD fast charging do not come with a USB PD fast charging charger standard. If users want to realize PD fast charging, they must purchase a fast charging charger by themselves to increase the cost of use. The audio adapter reference design of Fintek Jingtuo Technology supports the QC to PD fast charging protocol conversion function. Users do not need to purchase PD fast charging accessories separately. Use traditional QC chargers to quickly charge the device and can also support audio output, which is very practical. Actual tests found that after this reference design is paired with a QC fast charging charger, it can be fast charging for Huawei Mate10, Huawei P10, and Nintendo Switch.
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