The MAX8725 Evaluation Board (EV kit) is a high-precision, high-efficiency multi-chemistry battery charger. The evaluation board can charge up to three to four series-connected lithium-ion batteries (Li+) at a current of up to 3A. The charge current and input power current are regulated by onboard potentiometers. The output voltage can be set to 4.2V x the number of cells in the battery pack in series. The number of cells in series is selected by a jumper. By installing two resistors, the output voltage can be adjusted between 4V and 4.4V x (number of cells in series). The evaluation board also provides an output for monitoring AC adapter current and can monitor whether an AC adapter is connected.
The MAX8725 evaluation board is a high‑precision, high‑efficiency charger that supports three to four series‑connected Li‑ion cells with up to 3 A charging current. Input voltage ranges from +8 V to +25 V, and the board provides adjustable charging voltage and current via on‑board potentiometers and jumpers.
The manual includes an overview, component list, quick‑start steps, jumper settings, voltage and current limit adjustments, and detailed PCB layout diagrams to help users set up and verify the board’s operation. This manual is written in Chinese.
| Input voltage range | +8 V to +25 V |
|---|---|
| Maximum battery voltage | 17.6 V |
| Maximum charging current | 3 A (default) |
| Adjustable charging current range | 0.156 A to 5 A |
| Adjustable input current limit range | 3.75 A to 7.5 A |
Set jumper JU1 to the position that matches the number of series cells; the default position is for 4 cells.
Install the shorting jumper on JU2; this connects the PKPRES pin and enables the MAX8725.
The board ships with a preset charging current of 3 A.