HOW DOES IT WORK?

Charger 19 Click is based on the nPM1100, an integrated power management IC from Nordic Semiconductor. It supports charging batteries at up to 400mA. The charging current can be selected over the CHARGE SEL jumper (100, 200, 400mA). The low quiescent current extends battery life for shipping and storage in Ship mode or in operation with auto-controlled hysteretic buck mode for high efficiency down to 1μA loads. The Ship mode isolates the battery, can be activated by the host MCU, and deactivated over the onboard SHIP MODE RST key button or by connecting the Charger 19 Click to a VBUS power supply. The VBUS can be supplied with power over the USB C connector or the VBUS header with a voltage of 4.1 up to 5.5V.

The battery can be connected to the BATT connector with properly labeled polarity. It can also deliver up to 150mA of current to power external components with regulated voltage over the VOUTB terminal. The output voltage can be set in a range of 1.8 – 3.0V by the host MCU, according to the table in the datasheet. There is also a system voltage output terminal VSYS, which is automatically enabled after a power-on reset and indicated by the VSYS LED. In addition, there are CHG and ERR LEDs, which indicate the device's charging status.

The nPM1100 implements a thermal regulation based on battery temperature. There is an NTC SEL jumper to choose between the onboard 10K resistor or an external NTC thermistor, which can be connected over the NTC EXT connector. Finally, the termination voltage can be set over the VTERM SEL jumper between 4.1V and 4.2V (4.1V set by default).

Charger 19 Click uses a general purpose IO pins to communicate with the host MCU. The mentioned shipping mode can be activated over the SAC pin. You can always monitor the battery charging level over the analog AN pin and voltage divider. The buck regulator output voltage can be set over the VS1 and VS2 pins, but only when no connected device exists. You can connect the device to VOUTB after you set the output voltage.

This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.

SPECIFICATIONS