IR2121PBF Datasheet

Power Driver ICs


The IR2121PBF is a high speed power MOSFET and IGBT driver with over-current limiting protection circuitry. Latch immune CMOS technology enables ruggedized monolithic construction. Logic inputs are compatible with standard CMOS or LSTTL outputs, down to 2.5V logic. The output driver features a high pulse current buffer stage designed for minimum cross-conduction. The protection circuitry detects over-current in the driven power transistor and limits the gate drive voltage. Cycle-by-cycle shutdown is programmed by an external capacitor which directly controls the time interval between detection of the over-current limiting condition and latched shutdown. The output can be used to drive an N-channel power MOSFET or IGBT in the low side configuration. IR2121PBF Features • Gate drive supply range from 12 to 18V• Undervoltage lockout• Current detection and limiting loop to limit driven power transistor current• Error lead indicates fault conditions and programs shutdown time• Output in phase with input• 2.5V, 5V and 15V input logic compatible• Also available LEAD-FREE


[{"Name":"Operating Supply Voltage:","Value":"10 V to 20 V"},{"Name":"Rise Time:","Value":"60 ns"},{"Name":" Fall Time:","Value":"35 ns"},{"Name":"Output Current:","Value":"1 A"},{"Name":"Supply Voltage - Max:","Value":"23 V"},{"Name":"Supply Voltage - Min:","Value":"7 V"},{"Name":"Supply Current:","Value":"2.2 mA"},{"Name":"Maximum Power Dissipation:","Value":"1000 mW"},{"Name":"Maximum Operating Temperature:","Value":"+ 125 C"},{"Name":"Minimum Operating Temperature:","Value":"- 40 C"}]

Manufacturer information


Littelfuse offers innovative circuit protection solutions. Wherever one looks, Littelfuse is there. Streetlights, office buildings, cars, trucks, factories, computers, heating and cooling systems, electronic games, telecommunications equipment, even the satellites in the sky are protected by Littelfuse circuit protection products.

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