Half-bridge driver with 4 A gate drive and 120 V bootstrap ceiling
The Texas Instruments UCC27210DDAR is a high-frequency half-bridge driver for N-channel MOSFETs, delivering 4 A peak source and 4 A peak sink current to the gate load. The bootstrap supply is rated to 120 V maximum, which sets the upper DC-link voltage for the half-bridge topology. Two independent, non-inverting channels allow separate control of the high-side and low-side FETs with programmable dead-time inserted externally via the input logic timing.
Supply rail tolerance and logic-level compatibility
The 8 V to 17 V supply range covers the common 12 V bias rail with 4 V of headroom for transients and 4 V of margin below the nominal for cranking or brownout conditions. The logic input thresholds are specified at 2.4 V (VIL) and 5.9 V (VIH), which means a 3.3 V PWM controller output will not reliably drive the input high — a 5 V logic interface or a level-shifter is required. The 2.4 V VIL threshold is compatible with 3.3 V logic for the low state, but the 5.9 V VIH forces the use of a 5 V PWM signal or an external translator.
