
IR2125 (S) & (PbF)
Functional Block Diagram
V CC
UV
V B
IN
UV
DETECT
UP
SHIFTERS
HV
LEVEL
SHIFT
DETECT
PULSE
FILTER
R
R
S
Q
PRE
DRIVER
BUFFER
HO
1.8V
LATCHED
SHUTDOWN
PULSE
GEN
V B
V S
0.23V
ERROR
TIMING
PULSE
GEN
-
+
CS
ERR
Q
R
S
PULSE
FILTER
HV
LEVEL
DOWN
SHIFTERS
AMPLIFER
blanking
1.8V
COM
Lead Definitions
SHIFT
filter
COMPARATOR
Symbol
V CC
IN
ERR
COM
V B
HO
V S
CS
Description
Logic and gate drive supply
Logic input for gate driver output (HO), in phase with HO
Serves multiple functions; status reporting, linear mode timing and cycle by cycle logic
shutdown
Logic ground
High side floating supply
High side gate drive output
High side floating supply return
Current sense input to current sense comparator
Lead Assignments
1
Vcc
VB
16
1
V CC
V B
8
2
15
3
IN
HO 14
2
3
4
IN
ERR
COM
HO
CS
V S
7
6
5
4
5
6
ERR
COM
CS 13
VS 12
11
7
8
10
9
8 Lead PDIP
16 Lead SOIC (Wide Body)
4
IR2125
Part Number
IR2125S
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