The BQ24650 device is a highly integrated switch-mode battery charge controller. It provides input voltage regulation, which reduces charge current when input voltage falls below a programmed level. When the input is powered by a solar panel, the input regulation loop lowers the charge current so that the solar panel can provide maximum power output.
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| Item | Boardoza BQ24650 Module |
|---|---|
| Input Voltage Supply | 5V – 28V |
| Output Voltage Range | Selectable 4.2V , 8.4V , 12.6V , 16.8V |
| Power Input Type | 2.1 mm Barrel Jack , 2mm JST , Barrier Terminal |
| Functions | BQ24650 Stand Alone Synchronous Buck Battery Charge Controller for Solar Power with Maximum Power Point Tracking |
| Operating Temperature | -40°C to 85°C |
| Board Dimensions | 40 x 60 mm |
| (J2) PIN Number | PIN Name | Description |
|---|---|---|
| 1 | + | Solar Voltage Positive Input |
| 2 | – | Ground |
| (J3) PIN Number | PIN Name | Description |
|---|---|---|
| 1 | + | Solar Voltage Positive Input |
| 2 | – | Ground |
| (J4)PIN Number | PIN Name | Description |
|---|---|---|
| 1 | EN | This pin is “VREF”. 3.3-V reference voltage output from BQ24650 |
| 2 | TERM EN | Charge termination enable. Pull TERM_EN to GND to disable charge termination. Pull TERM_EN to VREF to allow charge termination. TERM_EN must be terminated and cannot be left floating. |
| 3 | DIS | Ground |
| (J5) PIN Number | PIN Name | Description |
|---|---|---|
| 1 | + | Solar Positive Output |
| 2 | – | Ground |
| (J6) PIN Number | PIN Name | Description |
|---|---|---|
| 1 | + | Battery Positive Pin |
| 2 | – | Ground |
| (NTC1) PIN Number | Pin Name | Description |
|---|---|---|
| 1 | Internal | Internal valid TS setting ( Review datasheet for more information. ) |
| 2 | TS | Temperature qualification voltage input. Connect to a negative temperature coefficient thermistor. Program the hot and cold temperature window with a resistor divider from VREF to TS to GND. A 103AT2 thermister is recommended. |
| 3 | External | External TS input ( Review datasheet for more information. ) |
| RT1 |
|---|
| RT1 is 103AT2 thermister connection. |
| 16.8V Jumper |
|---|
| If you want to set charge voltage to 16.8V, just jumper this two pins. |
| 12.6V Jumper |
|---|
| If you want to set charge voltage to 12.6V, just jumper this two pins. |
| 8.4V Jumper |
|---|
| If you want to set charge voltage to 8.4V, just jumper this two pins. |
| 4.2V Jumper |
|---|
| If you want to set charge voltage to 4.2V, just jumper this two pins. |
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