IR2121_15 Datasheet, PDF (1/16 Pages) International Rectifier – CURRENT LIMITING LOW SIDE DRIVER

Data Sheet No. PD60018-M
IR2121 & (PbF)
CURRENT LIMITING LOW SIDE DRIVER
Features
Product Summary
• 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
Description
V_OFFSET
I_O+/-
V_OUT
V_CSth
t_on/off (typ.)
5V max.
1A / 2A
12 - 18V
230 mV
150 & 150 ns
The IR2121 is a high speed power MOSFET and Package
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
8-Lead PDIP
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.
Typical Connection
TO
LOAD
V_CC
IN
(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.
V_CC
IN
ERR
COM
V_CC
OUT
CS
V_S
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