Data Sheet No. PD-6.017D
IR2125
CURRENT LIMITING SINGLE CHANNEL DRIVER
Features
n
Floating channel designed for bootstrap operation
Fully operational to +500V
Tolerant to negative transient voltage
dV/dt immune
n
Gate drive supply range from 12 to 18V
n
Undervoltage lockout
n
Current detection and limiting loop to limit driven
power transistor current
n
Error lead indicates fault conditions and programs
shutdown time
n
Output in phase with input
Product Summary
V
OFFSET
I
O
+/-
V
OUT
V
CSth
t
on/off
(typ.)
500V max.
1A / 2A
12 - 18V
230 mV
150 & 150 ns
Description
The IR2125 is a high voltage, high speed power
MOSFET and IGBT driver with over-current limit-
ing protection circuitry. Proprietary HVIC and latch
immune CMOS technologies enable ruggedized
monolithic construction. Logic inputs are compat-
ible with standard CMOS or LSTTL outputs. The
output driver features a high pulse current buffer
stage designed for minimum driver cross-conduc-
tion. The protection circuitry detects over-current
in the driven power transistor and limits the gate
drive voltage. Cycle by cycle shutdown is pro-
grammed by an external capacitor which directly
controls the time interval between detection of the
over-current limiting conditions and latched shut-
Package
down. The floating channel can be used to drive an
N-channel power MOSFET or IGBT in the high or
low side configuration which operates up to 500
volts.
Typical Connection
up to 500V
V
CC
IN
V
CC
IN
ERR
COM
V
B
OUT
CS
V
S
TO
LOAD
C
ONTROL
I
NTEGRATED
C
IRCUIT
D
ESIGNERS
M
ANUAL
B-107
IRF [ INTERNATIONAL RECTIFIER ]
