The Fan 6 Click Board™ features the EMC2103, an SMBus compliant fan controller with up to up to 3 external and 1 internal temperature channels. The fan driver can be operated using two methods each with two modes. The methods include an RPM-based Fan Speed Control Algorithm and a direct PWM drive setting. The modes include manually programming the desired settings or using the internal programmable temperature look-up table to select the desired setting based on measured temperature. And MIC2253 a high power-density, 1 MHz PWM DC/DC boost regulator which allows driving a 12V fan.