The IR221(4,41) gate driver family is suited to drive a single half bridge in power switching applications. These drivers provide high gate driving capability (2 A source, 3 A sink) and require low quiescent current, which allows the use of bootstrap power supply techniques in medium power systems. These drivers feature full short circuit protection by means of power transistor
●desaturation detection and manage all half-bridge faults by smoothly turning off the desaturated transistor through the dedicated soft shutdown pin, therefore preventing over-voltages and reducing EM emissions. In multi-phase systems, the IR211(4,41)/ IR221(4,41) drivers communicate using a dedicated local network (SY_FLT and FAULT/SD signals) to properly manage phase-to-phase
●short circuits. The system controller may force shutdown or read device fault state through the 3.3 V compatible CMOS I/O pin (FAULT/SD). To improve the signal immunity from DC-bus noise, the control and power ground use dedicated pins enabling low-side emitter current sensing as well. Undervoltage conditions in floating and low voltage circuits are managed independently.
●Features:
● Floating channel up to +600 V or +1200 V
● Soft over-current shutdown
● Synchronization signal to synchronize shutdown with the other phases
● Integrated desaturation detection circuit
● Two stage turn on output for di/dt control
● Separate pull-up/pull-down output drive pins
● Matched delay outputs
● Undervoltage lockout with hysteresis band
