Low-side gate driver maximises efficiency and flexibility

Fairchild Semiconductor has introduced the FAN3100 low-side gate driver, featuring enhanced input options for driving N-channel power MOSFETs and IGBTs. There are also special features to maximise efficiency.

Flexible input options include a choice of TTL or CMOS input thresholds to ensure board interoperability, as well as two inputs per channel to support a choice of inverting-plusenable, non-inverting-plus-enable, or two-logicsignal control. An Enable input is also provided, to turn the device on or off under external control. The FAN3100 defaults to the on-state if the Enable pin is left unconnected. In addition, there are fail-safe inputs to hold the output low if an input signal is absent.

Also optimised to maintain short and accurate time delays, the FAN3100 supports 1MHz switching, as well as paralleling of drivers and optimisation of drive timing to maximise efficiency. In addition, the new device implements Fairchild’s MillerDrive™ architecture at the output stage. This is a bipolar–MOSFET combination that ensures the highest peak current occurs during the Miller plateau of the MOSFET switching transition to minimise switching losses.

 

FEATURES Thermally-efficient miniature MLP package options Industry-standard pin-outs Operating voltage range: 4.5V to 18V <2ns propagation matching between channels Operating temperature range: -40°C to 125°C

APPLICATIONS Switched-mode power supplies Line drivers Digital audio amplifiers Synchronous rectifier circuits DC/DC converters

 

 

www.fairchild.com