Features

power transistor current

shutdown time

Description

The IR2121 is a high speed power MOSFET and

IGBT driver with over-current limiting protection cir-

cuitry. Latch immune CMOS technology enables rug-

gedized 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 mini-

mum cross-conduction. The protection circuitry de-

tects over-current in the driven power transistor and

limits the gate drive voltage. Cycle-by-cycle shut-

down is programmed by an external capacitor which

Data Sheet No. PD60018-M

CURRENT LIMITING LOW SIDE DRIVER

Product Summary

5V max.

1A / 2A

12 - 18V

230 mV

150 & 150 ns

Package

Typical Connection

8-Lead PDIP

V

CC

V

CC

CS

OUT

V

S

COM

IN

ERR

TO

LOAD

V

CC

IN

IR2121 & (PbF)

www.irf.com

1

(Refer to Lead

Assignments for correct

pin configuration). This/

These diagram(s) show

electrical connections

only. Please refer to our

Application Notes and

DesignTips for proper

circuit board layout.

directly controls the time interval between detection of the over-current limiting condition and latched shut-

down. The output can be used to drive an N-channel power MOSFET or IGBT in the low side configuration.