The PWM signal drives the fan directly; the drive FET is integrated inside the fan. Reducing the external component count, this approach makes the external circuit much simpler. Since the PWM drive signal is applied directly to the coils of the fan, the fan’s electronics are always powered ...
The issue of providing appropriate gate voltage is addressed by using a gate driver that does the job of a level shifter. The gate capacitor though, cannot change its voltage instantaneously. Thus, a power FET or IGBT has a non-zero, finite switching interval. During switching, the device ma...
Basic buck arrangement.3 ∆IL The buck is called a regulator if the switches are internal, or a controller if the switches are external. It's synchronous if both switches are transistors (MOSFETs or BJTs) or asynchronous if the bottom switch is implemented with a diode. Each of these ...
as requested by the FPGA itself. There is a register inside of the FPGA that contains a device-specific voltage (programmed at the factory) at which the FPGA is guaranteed to operate efficiently. A piece of compiled IP inside of the FPGA can read this register and make...