"Potato Thunder Bomb" - Bidirectional fast charge based on Zhirong SW7201

Completed

PRO MakerLab "Potato Thunder Bomb" - Bidirectional fast charge based on Zhirong SW7201

Power_Module

MakerLab

License: GPL 3.0

Mode:

Editors' pick

Update time： 2024-11-22 06:40:42

Creation time： 2024-11-22 02:05:29

Description

SW7201 is a high-efficiency synchronous 4-tube bidirectional buck-boost charge/discharge controller, support 1-4 batteries charge and discharge management, support I2C control, can provide a maximum power output of 100W, this project uses SW7201 as a lithium battery management chip, uses HSUB238 PD decoy chip to fast charge lithium battery, but also can output 20V5A/100W energy, can charge notebooks, mobile phones and other electronic products when going out.

SW7201 chip introduction:

High-efficiency buck-boost switch charging:

➢ Supports buck-boost charging of 1 to 4 lithium batteries, including full charge cycle management.

➢ Support 3V-19.2V charging target voltage setting Can support many types of lithium batteries.

➢ Support 100W input power.

➢ Support 4V-24V input voltage.

➢ Support I2C programming to control input/battery current limiting.

➢ Seamless switching between boost and buck.

Reverse buck-boost discharge:

➢Support 100W output power.

➢Support 3V-22V output voltage.

➢FB/I2C voltage regulation mode can be flexibly selected.

➢Support I2C programming to control output current limiting.

➢PFM/PWM mode automatically switches with load size.

The chip has a built-in 12-bit ADC.

The battery side uses an XT60 model airplane interface and a DC005 interface, and the reserved output pad can be connected to other interfaces.

1~4 lithium batteries can be selected by configuring the BSSTT terminal resistance of the chip; The inductor can be selected as 1~4.7uH high-power inductor, and the resistance capacitance parameters corresponding to different inductors COMP are different.

At present, four 21700mAh 21700 lithium batteries of DMC are used as the battery end, and the charge and discharge rates can meet the requirements.

Material object

PD decoy chip HUSB238 decoy 20V input.

Output.

There is a video of the use of electronic load with 60W in the attachment, as well as switching different voltage levels, if you use high-power with load for a long time, you still have to use a fan to dissipate heat, and then consider adding it to the interior, because there is only one color screen printing roll, and the current color is still black ink, I am afraid that the first version is not wasted, and you can enjoy color proofing if the verification is successful, thank you for your support for this event, and have accumulated some experience in this activity.