Preliminary Data Sheet No. PD60205
IR3221
FULLY PROTECTED H-BRIDGE for DC MOTOR
Features
•
•
•
•
•
•
•
•
Over temperature shutdown
Over current shutdown
Ιnrush
current limited by Soft-Start
sequence
E.S.D protection
Sleep mode for direct battery connection
Braking / non-braking operation
Internal switching oscillator
Direct interface for End switches
Product Summary
Rdson
Vcc.op.
I cont. ( heat sink )
I shutdown
Oper. Freq.
15 mΩ max.
5.5 to 35 V
20.0 A
50 A
20 kHz
Description
Packages
The IR3221 is a Fully Protected Dual High Side Switch
I.C. With two additional Low Side switches (IRL1404),
the IR3221 drives and controls the whole H bridge
topology. It provides shoot-through protection for each
leg, H bridge logic control, soft-start sequence and
over-current /over-temp. protections. The signals IN1
and IN2 select the operation modes and the PWM
Soft-Start sequence cycles the corresponding active
low side switch in order to limit the motor inrush cur-
SIP 15
TO220 - IRL1404
rent. By using the recommended part number and the
proper cooling, the inner High Side IPS protects the
whole H-bridge function. The Soft-Start sequence is programmed by an RC time constant and reset itself
automatically.
Block Diagram
+ Bat.
VCC
Gnd
+5V
SS
IN 1 LS gate 1
IR 3221
M1
M2
LS gate 2
IN 2
Clockwise motion
10 k
R
D
G
TO 220 Mosfet
D
G
10 k
Counter clockwise motion
TO 220 Mosfet
S
S
5V
C
Debouncing
RC networks
( e;g 10 nF )
Micro
Controller
Electrical stop
Electrical stop
0V
IR3221
Absolute Maximum Ratings
Absolute Maximum Ratings indicate sustained limits beyond which damage to the device may occur. All voltage
parameters are referenced to GROUND pin . T Ambient = 25 °c unless otherwise specified.
Symbol
Vm1(2)
Vin1 (2)
I in1 (2)
Vg1 (2)
Vss
Isd cont.
Isd pulsed
Esd 1
Esd 2
Pd
Tj max.
T lead
1
Parameter
Maximum M1 (M2) voltage ( active clamp )
Maximum IN 1 (IN 2) voltage
Maximum IN1 (IN 2) current
Maximum Gate 1 ( Gate 2 ) voltage
Maximum SS voltage
Diode max. permanent current (Rth=50°C/W)
Diode max. pulsed current
Electrostatic Disch. (human body model)C=100 pF R= 1500
Ω
Electrostatic Disch. ( Machine model ) C=200 pF R= 0
Ω
Maximum power dissipation (Rth=50°C/W)
Maximum storage & operating junction temperature
Lead temperature ( soldering 10 s )
1
1
Min.
Vcc-37
-0.3
-1
-0.3
-0.3
-
-
-
-
-
-40
-
Max.
Vcc+0.3
5.5
10
7.5
5.5
4
45
4
0.5
2.5
+150
300
Unit
V
V
mA
V
V
A
A
kV
kV
W
°C
°C
Limited by junction temperature ( pulsed current limited also by internal wiring
Thermal Characteristics
Symbol
R th 1
R th 2
Parameter
Junction to amb. Thermal resistance
Junction to tab Thermal resistance
typ
50
1.0
max
-
-
Unit
°C/W
°C/W
Recommended Operating Conditions
Those values are given for a quick design. For operation outside those conditions, please consult the application note
AN 1032
Symbol
Vcc
Vin1(2)
Vin1(2)
Iout max. 1
Iout max 2
R in
R
C
R gates
2
Parameter
Continuous Vcc voltage
High level IN1 (IN 2) input voltage
Low level IN1 (IN2) input voltage
Output cont. current ( Rthja=50°C/w, tamb=85°C, Tj=150°C )
Output cont. current ( Rthja=5°C/w, tamb=105°C, Tj=150°C )
Recommended resistor in series with IN pin
Soft-Start resistor
Soft-Start capacitor
Recommended gate resistors for Low Side Switches
2
Min.
8
4
-0.3
-
-
10
5.0
0.1
0
Max.
28
5.5
0.9
7.7
24
20
390
3.3
50
Unit
V
V
V
A
A
k
Ω
k
Ω
µF
Ω
Protections are operating down to 5.5 V
2
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IR3221
Static Electrical Characteristics
o
T
j
= 25 C, V
CC
= 14V unless otherwise specified.
Symbol
Rds on @ Tj = 25°C
Rds on @ Tj = 150°C
Vcc oper.
V clamp1 (2)
Vf1(2)
I M1(2) leakage
Icc off
Icc on
V ih1(2) threshold
V il1 (2) threshold
I in1(2)
Vccuv+
Vccuv-
Vss +
Vss -
I ss leakage
Parameter
ON state resistance Tj = 25 °C
ON state resistance Tj = 150 °C
Operating voltage range
Vcc to M1 (M2) clamp voltage
Body diode 1(2)forward voltage
M1 (M2) output leakage current
Supply current when off
Supply current when on
IN1 (IN2) high threshold voltage
IN1 (IN2) low threshold voltage
ON state IN1 (IN2) positive current
Vcc UVLO positive going threshold
Vcc UVLO negative going threshold
SS high level threshold
SS low level threshold
SS pin leakage current
(sleep mode )
Min.
-
-
5.5
37
-
-
-
-
-
-
-
-
-
-
-
-
Typ.
12
20
-
40
0.9
10
10
8
2.6
2.0
35
4.5
4.2
4.2
1.2
-
Max.
16
-
35
48
-
50
50
-
-
-
-
-
-
-
-
10
Unit
m
Ω
m
Ω
V
V
V
µA
µ
A
mA
V
V
µ
A
V
V
V
V
uA
Test Conditions
Vin1,2 = 5 V ; Im1,2 = 5 A
Vin1,2 = 5 V ; Im1,2 = 5 A
Id = 10 mA see Fig. 1 & 2
Id = 5 A ; Vin1,2 = 0 V
Vm1,2 = 0 V ; Tj = 25 °c
Vin1,2 = 0 V, Tj = 25 °c
Vin1 = 5 V
Vin1,2 = 5 V
Switching Electrical Characteristics
V
CC
=14V, Resistive Load =2.8Ω, R input = 10kΩ, and T
j
= 25
o
C for each high side switch (unless otherwise specified).
Symbol
td-on
Tr 1
Tr 2
dV/dt ( on )
Eon
td-off
Tf
dV/dt ( off )
Eoff
IN1(2) Max. Freq.
Soft-Start freq.
I g1 (2) Max.
Trd
Parameter
Turn-on delay time
Rise time to Vout = Vcc - 5 V
Rise time to Vout = 90% of Vcc
Turn-ON dV/dt
Turn-ON energy
Turn-off delay time
Fall time to Vout = 10% of Vcc
Turn-OFF dV/dt
Turn-OFF energy
Max. Frequency on IN1 (IN2 )
Soft-Start oscillator frequency
Max. Gate 1 ( Gate 2 ) current
Min. IN1(2) OFF time to reset SS
Min.
-
-
-
-
-
-
-
-
-
-
15
50
2.0
Typ.
5
4
65
3
3
65
8
5
0.75
500
20
-
-
Max.
-
-
-
-
-
-
-
-
-
-
30
-
-
Unit
µ
S
µS
µ
S
V/
µ
s
mJ
µ
S
µ
S
V/µs
mJ
Hz
kHz
mA
mS
Test Conditions
see fig. 3
see fig. 3
see fig. 3
see fig. 3
see fig. 4
see fig. 4
see fig. 4
low side driver
C=3.0 uF,IN1=IN2
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IR3221
Protection Characteristics
(High side switch protection)
Symbol
Tsd
Isd
T reset
Note :
Parameter
Over-temperature threshold
Over-current threshold
Minimum time to reset protections
Min.
-
42
Typ.
165
50
300
Max.
-
60
-
Unit
°C
A
µ
S
Test Conditions
see fig. 2
see fig. 2
IN1=IN2 = 0 V
The low side switches present sufficient cooling capability in order to have the whole H-bridge function
protected by the IR 3221 inner temperature sensor.
Truth Table
IN1
L
L
L
H
H
H
*
IN2
L
H
H
L
L
H
MODES
Stand-by with braking - sleep mode **
forward rotation ( normal operation )
forward rotation ( protection triggered )
reverse rotation ( normal operation )
reverse rotation ( protection triggered )
Stand-by without braking
HS1
OFF
OFF
OFF
ON
OFF
OFF
LSS1
ON
ON*
ON*
OFF
OFF
OFF
HS2
OFF
ON
OFF
OFF
OFF
OFF
LSS2
ON
OFF
OFF
ON*
ON*
OFF
SS reset
ON
OFF
OFF
OFF
OFF
ON
During Soft-Start sequence, the low side part is switching.
** Protections are reset in this mode
Block Diagram
SS
Soft Start duty cycle
+
S S reset
-
Oscillator
10 mA
Gnd
VCC
IN 1
VCC
H Bridge logic control
& status feedback
40 V Active Clamp
40 V Active Clamp
IN 2
Shoot-through
protection
Over current
shutdown
Over temp.
protection
Over current
shutdown
Shoot-through
protection
G1
Low Side
Driver
Low Side
Driver
G2
M1
M2
Gnd
4
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IR3221
Lead Definitions
Vcc
M1
M2
G1
G2
Gnd
Positive power supply
Motor 1 output ( high side source - leg 1 )
Motor 2 output ( high side source - leg 2 )
Gate 1 drive output ( low side gate - leg 1 )
Gate 2 drive output ( low side gate - leg 2 )
Power supply return
IN1
IN2
SS
Logic input 1 ( Leg 1 Cdt. / mode )
Logic input 2 ( Leg 2 Cdt. / mode )
RC soft-start input ( the voltage on this input
drives the switching duty cycle )
Recommended Low Side Mosfet
IRL1404
4.5 m
Ω
/ 40 V – TO 220 packaged Power Mosfet
Lead Assignments
m1 m1 m1 nc g1 gnd ss Vcc in2 in1 g2 nc m2 m2 m2
G D S
SIP 15
IR 3221
Soft-Start Sequence
IN1
(IN2)
TO 220
IRL1404
SS
M1-M2
(M2-M1)
Vss+
Vss-
Duty cycle modulation follows SS voltage
Tss ( approximately 2 x RC time constant )
Trd
t
t
t
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