Hi, guys. Welcome back to ChargerLAB.
Many laptops are equipped with USB-C port and PD protocols nowadays.
But there're still many old power adapters that come with a DC connector.
Today, we gonna introduce this converter
that can make full use of old power adapter with a DC connector.
It enables traditional power adapters to support a variety of fast charging protocols
and can support 100W PD fast charging.
So, let me introduce it to you.
This PCB adopts pure purple.
There are two capacitors at the input and output.
The buck-boost circuit and output control circuit are in the middle.
No components are on the back.
The output is equipped with a USB-C and a USB-A.
The size of the PCB is about 84*40*14mm (3.31*1.57*0.55 inches).
And then, let's see what components are on the PCB.
Two input capacitors are from Chengxing.
25V 470μF.
And two output capacitors are also from Chengxing.
25V 470μF.
The master control chip comes from Southchip SC8701,
which is a synchronous 4-switch buck-boost controller.
It can effectively control the output voltage and support very wide input and output voltage range.
Two buck-boost MOSFETs are from CR Micro and adopt PDFN5*6 package.
45V, 5.2mΩ.
The other two MOSFETs are the same.
And they can form an H-bridge.
The protocol chip comes from Ismartware SW2305.
It can support mainstream fast charging protocols and can support two working modes.
It integrates CV/CC mode, USB-C interface logic, controller, and safety protection measures.
The output VBUS MOSFET of USB-C comes from AOS.
Next, we gonna use the Chicony 20V9A AC adapter to test the converter.
Insert to the DC port.
And use the ChargerLAB POWER-Z KT002 to test the USB-A.
It can support Apple 2.4A, Samsung 5V2A, QC3.0/2.0, AFC, FCP, SCP, PE, etc.
Besides that, USB-C can support PD 3.0 and PPS additionally.
And it also has five fixed PDOs of 5V3A, 9V3A, 12V3A, 15V3A, 20V5A.
And a set of PPS of 3.3-21V 5A.
But the actual output will be limited by the input power.
Next, let's test it with a few devices and check its compatibility.
Almost all tested devices can support fast charging.
The final test is the temperature test.
We'll connect the USB-C port to a 100W external load.
And put it into a 25 °C (77 ℉) thermostat.
After half an hour, the maximum temperature is about 99.6 °C (211.28 ℉).
And then it'll reach 101 °C (213.8 ℉) after an hour.
Well, that's the brief introduction to this DC to USB converter.
It's developed based on Southchip buck-boost chip and Ismartware protocol chip.
So, it can support wide range of input voltages and mainstream fast charging protocols.
Most of the devices can be compatible with it.
And the USB-C can support up to 100W output.
In this case, you can convert your DC power adapter into a powerful PD charger.
OK, that's all for today's video.
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I'll catch you guys in the next video.