VREG click VREG click is a digitally controlled DC Voltage regulator in mikroBUS™ form factor. The design is based on the well-known LM317 circuit, with the addition of a 12-bit DAC, 12-bit ADC, and an Operational Amplifier. Two pairs of screw terminals serve as inputs and outputs. The LM317 IC is a reliable regulator with typical line regulation of 0.01% and load regulation of 0.1%. It also has internal short-circuit current limiting and thermal overload protection. The circuit regulates voltage by turning all input/output difference into heat (effectively dissipating all the excess power). If it gets too hot it may damage the board or cause unexpected behaviour. Because of that, the board’s operating range is defined by two factors. 1) maximum input voltage and current (should not exceed 20V/1A); and 2) maximum wattage arising from current and I/O voltage difference (should not exceed 2W, measured as I x (Input V - Output V). The board also carries a MOSFET chip to toggle the output on and off. VREG click communicates with the target board MCU through the SPI interface (CS, SCK, MISO, MOSI). The board can use either a 3.3V or a 5V power supply. It is also possible to use the board’s power supply as the Input, by resoldering the onboard INPUT SEL jumper. R515  Qty: Add to Basket Price ex. VAT. Stock: Lead-time applicable [i].

Charger click Charger click carries both a battery charger controller and a battery charge monitor, along with a battery connector. The smaller chip is MCP73831, a miniature single-cell Li-Ion and Li-Polymer charge management controller with a programmable charge current from 15 to 250 mA. The larger IC is DS2438, a smart battery monitor which integrates a temperature sensor, a timer, an ADC to measure the battery voltage and current, and a current accumulator that monitors the total amount of current going into and out of the battery. Charger click communicates with the target MCU through a 1-Wire interface. Charger click is designed to use a 5V power supply. R470  Qty: Add to Basket Price ex. VAT. Est. Weight: 20g. Stock: Lead-time applicable [i].

MCP73213 click MCP73213 click carries the MCP73213 dual-cell Li-Ion/Li-Polymer battery charge management controller with input overvoltage protection from Microchip. The click is designed to run on either 3.3V or 5V power supply. It communicates with the target microcontroller over SPI. R385  Qty: Add to Basket Price ex. VAT. Stock: Lead-time applicable [i].