DRV3901-Q1 Single-Channel Pyro-Fuse Driver Texas Instruments DRV3901-Q1 Single-Channel Pyro-Fuse Driver is a highly integrated squib driver for automotive EV pyro-fuse applications. It includes the power supplies, current sensing and regulation, and diagnostics and protection functions needed to drive a squib load. It incorporates several vital functions unique to the device and different from traditional squib drivers. These functions include a hardware pin trigger interface, an energy reservoir capacitor diagnostic, an addressable SPI, and an optimized driver stage with an integrated charge pump and additional deployment current options.