Love Tomb Style No. 233-PL5501 100W wide range high current buck-boost module in the atmosphere

Input voltage: 4-22V

The input comes with an FS312, which can trick PD into fast charging input within 20V.

Output voltage: 4-24V

Current capability: sustainable around 5A (IO)

Equipped with input deception function

Output adjustable, EN enabled

Equipped with the soon-to-be-released Tomb-style 240 power supply to support fast charging and other precision adjustments

The measured function of the module is basically normal:

(First test message)
The EN test was successful (I don’t know why it is not sensitive for the first time, and it seems that because EN is provided by VDD, the chip generates huge heat)

The deception test is successful, but try not to touch the pin header after the deception is successful, as the voltage may jump.

However, since the capacitor on the COMP pin I soldered is 33nf, there are some problems with the output voltage loading in boost mode, but there are no other problems.

Characteristics: The larger the output current, the lower the ripple (within 30 millivolts), and the low current output ripple can reach 60 millivolts.

I'm still testing it further, I'll wait until I have the correct capacitor soldered on.

(Second test message)

The boost mode has been restored, which shows that the RC under the COMP pin must be in accordance with the schematic diagram.

The picture shows the load screen when I input 12V and output 14V (the power of the electronic load and the 12V input terminal is limited, so I cannot test large current)

Don't be happy, I tested it further

I found that when inputting 5V, the output no-load voltage is 14V as shown in the picture above (the potentiometer did not move when I changed 12V to 5V)

Once the loaded output drops to 9V, disconnect the load again and the output becomes 11V without load.

I changed it to 9V input again, and the boost worked normally (the load was also kept at the 14V default)

So my suggestion is that the input should be greater than 9V, so as to obtain a large voltage range output capability.