36/24/12/9V – 5V 3A Step-Down 4USB Ultra-Multi-USB interfész autós töltő napelem modul
36/24/12/9V to 5V 3A Step-Down 4USB Ultra-Multi-USB Interface Car Charging Solar Module
Description
Car 12v, 24V~38v turn 5v3A, power supply for mobile phones, navigation, etc. Car 4 usb charging
Size: width 37*length 47*height 18
The input voltage range reaches 7~40v, within this range, the output voltage is stable. Since the voltage of some components is 40v, it can only be marked 9~35v, leaving room for it.
The four USBs of the previous version are all connected in parallel and share five amps. This time each dual-layer USB shares a 5v3a chip, dual insurance scheme, two dual-layer USBs are independently powered, each is 3a, and the total current is 6a. Professionals can also modify it to be dual adjustable, that is, two double-layer USBs can be of different voltages. For example, the voltage on the left side is supplied to the tablet, and the voltage can be adjusted to 5.3v, but the right side needs to be supplied to the electronic dog, and the voltage is only 5.08v. Just happy for everyone.
The output voltage is between 5.08~5.18v, which is similar to the power supply on the market and can compensate for the loss of the data line. It can be said that there is no need to go to the adjustable version, the voltage is very good. The voltage range of USB is 4.75v~5.25v, please do not exceed it to avoid damage, the tablet will adjust the voltage according to your requirements, this is more difficult to say, generally the tablet is 5.2~5.3v.
This time it is brand new components, none of the disassembled parts, brand new components, dual-core drive. The performance is further improved and more secure.

Using synchronous rectification technology ●3A output current ●Integrated power MOSFET switch ●Efficiency up to 95% ●Programmable soft start ●Stable low ESR output ●Cycle-by-cycle overcurrent protection ●Fixed frequency 340KH ●Input undervoltage lockout Limits, ●Over-voltage protection and thermal shutdown

Although you can't see a large radiator, the double-layer USB and PCB are all copper, which is a good radiator. Since each IC is only responsible for 3a, it has very low power consumption and the heat generation is within the normal range.
A diode is added to the input terminal, it will not burn if it is connected reversely. If it is found that it is not energized, it will be turned on when it is turned on. But do not connect to the output terminal.

Wiring method: connect the positive voltage of 7 to 38v to the input positive, and the negative voltage to the negative of the icon below, and the four USBs will have a stable 5v voltage. Just plug your mobile phone data cable into the USB. used. The output is convenient for those devices without a USB cable. It is only for professionals. If you don’t understand it, just ignore this interface.
Built-in Apple identification resistor, Apple charging current is about 2.4a; Android phone is about 1a. Please use a high-quality data cable.
Near the terminal, there is a diode SS54, which is an anti-reverse diode. Professionals can short-circuit it, or change it to a fuse, and toss it by themselves.
With apple identification resistor, 47k 56k, 2.7v. Samsung’s S5 mobile phone is currently incompatible. If you have this phone, please contact the owner. Or remove the four resistors, R1, R2, R3, R4, and crush them with pliers. Then the circuit board becomes four and can be plugged into an Android phone.
Q: My phone only has 1A current. Will your 3A converter burn out my phone?

Answer: No; 3A means that the maximum current that the converter can withstand is 3A. As long as your device is below 3A, it can be used. The voltage is the same. The current is self-adaptive and built into the phone. Controlled by the chip, this power supply only provides standard 5v. How to charge it and stop automatically when it is full is a matter of the mobile phone. As long as the working voltage is 5v equipment, it can be used. To use an analogy, there was a box of ten tons of cargo, and a 50-horsepower car could not pull it. He had to request support from his superiors. As a result, a 100-horsepower car was sent and pulled away. If you send a 200-horsepower car, it will be even easier. For the same reason, if a 5v1A working device is used to pull it with a 5v1a power supply, it will be very laborious, and the power supply may even burn out with the device! If you use a 5v3a power supply to pull, it will be easier.

It can also become an adjustable version.
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