XINABOX LIMITED PL01

This xCHIP charges a 3.7V LiPo battery via power input from a micro USB power source. Unless connected to this micro USB power source, the circuit draws power from the LiPo battery and supply the xBUS with power. The on-board MCP73831 LiPo battery charging IC offers a simple and efficient battery charging solution with various features such as auto off, cell preconditioning, cell temperature monitoring, reverse polarity protection, status indication and undervoltage protection/brown-out. It is capable of charging the battery at a rate up to a maximum of 500mA. The equipped PAM2305 is a step-down current-mode, DC-DC converter. At heavy load, the constant frequency PWM control performs with excellent stability and transient response. To ensure the longest battery life in portable applications, the PAM2305 provides a power-saving Pulse Skipping Modulation (PSM) mode to reduce quiescent current under light load operation to save power.