Not recommended for new designs. No replacement is available
January 16, 2009
Datasheet No. - PD97375
IRS21956S
Floating Input, High and Low(Dual mode) Side Driver
Features
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•
•
•
•
•
•
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Low side programmable ramp gate drive
Low side generic gate drive integrated using the
same low side output pin
High side generic gate driver
Under voltage lockout for VDD, VCC & VBS
Floating 5V input logic compatible
Tolerant to negative transient voltage on Vs
Shoot through prevention
RoHS compliant
Product Summary
Topology
V
OFFSET
LO SR
+
I
o+
& I
o-
(typical)
t
ON
& t
OFF
(typical)
PDP
≤
600 V
4.5V/us
0.5A & 0.5A
300ns & 280ns
Package Options
20-Lead SOIC
www.irf.com
© 2008 International Rectifier
1
Not recommended for new designs. No replacement is available
IRS21956S
Table of Contents
Description
Simplified Block Diagram
Typical Application Diagram
Qualification Information
Absolute Maximum Ratings
Recommended Operating Conditions
Static Electrical Characteristics
DV / Linear (Stepwise) Mode
Dynamic Electrical Characteristics
Timing Diagram and logic truth table
Input/Output Pin Equivalent Circuit Diagram
Lead Definitions
Lead Assignments
Package Details
Tape and Reel Details
Part Marking Information
Ordering Information
Page
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www.irf.com
© 2008 International Rectifier
2
Not recommended for new designs. No replacement is available
IRS21956S
Description
The IRS21956 is high voltage and programmable ramp slope control gate driver for MOSFET and IGBT with
single low side dual mode driver, high side driver and floating 5V input. Proprietary HVIC and latch immune
CMOS technologies enable ruggedized monolithic construction. The floating logic input is compatible with
standard 5V CMOS or LSTTL output. The output driver features a programmable slope control by external
R/C and input signals. The floating channels can be used to drive an N-channel power MOSFET or IGBT in
the high side configuration, which operates up to 600 volts above the COM ground.
www.irf.com
© 2008 International Rectifier
3
Not recommended for new designs. No replacement is available
IRS21956S
Simplified Block Diagram
VB
VDD
UVLO
UVLO
R
LIN1
LIN2
Logic and
Pulse
Generator
Pulse
Filter
R
S
Q
HO3
VS
HIN3
VSS
Level
Shift
Down
VCC
Level
Shift
Up
UVLO
Shoot
Through
Prevention
And
Logic
circuit
Conditioning
And Op- amp
Driving
-
LO
+
VSE
Reference
Generating
R
Pulse
Filter
R
S
Q
10 V
regulator
VREF
COM
DV
RES
www.irf.com
© 2008 International Rectifier
4
Not recommended for new designs. No replacement is available
IRS21956S
Typical Connection Diagram
A) Linear Ramp driver’s connection diagram
B) Stepwise linear Ramp driver’s connection diagram
V
SET
NC
VB
HO3
VS
NC
IRS21956
SOW20
NC
VCC
LO
VSE
R
RES
VREF
DV
RES
COM
5 V
DD
VDD
LIN1
LIN2
HIN3
VSS
NC
NC
Panel
25 V Max
C
REF
Optional Cc
www.irf.com
© 2008 International Rectifier
5