IR43x1
1
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© 2013 International Rectifier
Features
Integrated analog input Class D audio amplifier
in a small 5 x 6 mm PQFN package
High peak music power output
No mechanical heatsink required
Split or single power supply
Differential or single-ended input
Over-current, over-temperature and under
voltage protections with self-reset function
Start and stop click noise reduction
High noise immunity
RoHS compliant
Typical Applications
Home theatre systems
Docking station audio systems
PC audio systems
Musical instruments
Karaoke amplifiers
Game consoles
Powered speaker systems
General purpose audio power amplifiers
Topology
Half-Bridge,
Full-Bridge
*IR4301 Output power
(Typical, THD+N=10%)
160 W/ 4 Ω
120 W/ 3 Ω
*IR4321 Output power
(Typical, THD+N=10%)
90 W/ 4 Ω
135 W/ 2 Ω
*IR4311 Output power
(Typical, THD+N=10%)
35 W/ 4 Ω
45 W/ 3 Ω
*Residual noise
(AES-17, IHF-A, typical)
250 μVrms
*THD+N
(1kHz, 1W, 4 Ω, typical)
0.02 %
Typical Connection
-B
+B
Speaker
VB
VAA
VSS
IN+
IN-
COMP
CSD
COM VN
VS
VP
VCC
CSH
GND
VCC
INPUT
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© 2013 International Rectifier
Table of Contents
Page
Typical Connection Diagram
1
Qualification Information
4
Absolute Maximum Ratings
5
Recommended Operating Conditions
7
Electrical Characteristics
8
Functional Block Diagram
11
Input/Output Pin Equivalent Circuit Diagram
12
Lead Definitions
13
Lead Assignments
13
Package Details
14
Part Marking Information
15
Ordering Information
15
April 22, 2013
IR43x1
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© 2013 International Rectifier
Description
The IR43x1 integrates PWM controller and digital audio MOSFETs forming a high performance Class D audio
amplifier. As a result of fully optimized MOSFETs co-packed with a dedicated controller IC, the IR43X1operates
without mechanical heatsink attached in a typical music playback usage. High voltage ratings and noise immunity
in the controller IC ensures reliable operation over various environmental conditions. A small 5x6 mm PQFN
package enhances the benefit of smaller size of Class D topology. The IR43x1 are a lead-free, ROHS compliant.
Typical Connection Diagram
1. Inverting Amplifier
-B
+B
Speaker
VB
VAA
VSS
IN+
IN-
COMP
CSD
COM VN
VS
VP
VCC
CSH
GND
VCC
INPUT
2. Differential Amplifier
-B
+B
Speaker
VB
VAA
VSS
IN+
IN-
COMP
CSD
COM VN
VS
VP
VCC
CSH
GND
VCC
IN-
IN+
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© 2013 International Rectifier
3. Single Power Supply
VB
VAA
VSS
IN+
IN-
COMP
CSD
COM VN
VS
VP
VCC
CSH
GND
VCC
VIRTUAL
GND
+Vbus
Speaker
IN-
IN+
Qualification Information†
Qualification Level
Industrial††
Comments: This family of ICs has passed JEDEC’s
Industrial qualification. IR’s Consumer qualification level is
granted by extension of the higher Industrial level.
Moisture Sensitivity Level
MSL2
(per IPC/JEDEC J-STD-020C)
ESD
Machine Model
Class B
(per JEDEC standard EIA/JESD22-A115)
Human Body Model
Class 2
(per EIA/JEDEC standard JESD22-A114)
IC Latch-Up Test
Class I, Level A
(per JESD78)
RoHS Compliant
Yes
†
Qualification standards can be found at International Rectifier’s web site http://www.irf.com/
††
Higher qualification ratings may be available should the user have such requirements. Please contact
your International Rectifier sales representative for further information.
†††
Higher MSL ratings may be available for the specific package types listed here. Please contact your
International Rectifier sales representative for further information.
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© 2013 International Rectifier
Absolute Maximum Ratings
Absolute Maximum Ratings indicate sustained limits beyond which damage to the device may occur. All voltage
parameters are absolute voltages referenced to COM=VN; all currents are defined positive into any lead. The
Thermal Resistance and Power Dissipation ratings are measured under board mounted and still air conditions.
Symbol
Definition
Min
Max
Units
VP
VP pin positive power supply rail voltage
IR4301
-
80
V
IR4321
-
60
IR4311
-
40
VB
High side floating supply voltage
IR4301
-0.3
95
IR4321
-0.3
75
IR4311
-0.3
55
VCSH
CSH pin input voltage
VS -0.3
VB +0.3
VS
High side floating supply voltage††
VB -15
VB +0.3
VCC
Low side supply voltage††
-0.3
15
VAA
Floating input positive supply voltage††
IR4301
-0.3
100
IR4321
-0.3
70
IR4311
-0.3
50
VSS
Floating input negative supply voltage††
-1
(See ISSZ)
GND +0.3
VIN+
Floating input supply ground voltage
VSS -0.3
VAA +0.3
IIN
Input current between IN- and IN+ pins†
-
±3
mA
VCSD
CSD pin input voltage
VSS -0.3
VAA +0.3
V
VCOMP
COMP pin input voltage
VSS -0.3
VAA +0.3
IAAZ
Floating input supply zener clamp current††
-
20
mA
ISSZ
Floating input negative supply zener clamp current††
-
20
ICCZ
Low side supply zener clamp current†††
-
20
IBSZ
Floating supply zener clamp current†††
-
20
dVS/dt
Allowable Vs voltage slew rate
-
50
V/ns
dVSS/dt
Allowable Vss voltage slew rate†††
-
50
V/ms
Id@ 25ºC
Continuous output current, from VP to VS, VS
to VN, VCC=10V, VB-VS=10V
IR4301
-
6.5
A
IR4321
-
7.0
IR4311
-
3.6
Id@ 100ºC
Continuous output current, from VP to VS, VS
to VN, VCC=10V, VB-VS=10V
IR4301
-
5.4
IR4321
-
5.8
IR4311
-
2.9
IDM
Pulsed output current, from VP to VS, VS to
VN, VCC=10V, VB-VS=10V †††††
IR4301
-
26
IR4321
-
28
IR4311
-
15
Pd
Power dissipation†††† @ TC = 25C
IR4301
-
31
W
IR4321
-
31
IR4311
-
9
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RthJC
Thermal resistance, junction to case††††
IR4301
-
4
C/W
IR4321
-
4
IR4311
-
13
TJIC
Control IC junction temperature
-
150
C
TJFET
FET junction temperature
-
150
TS
Storage Temperature
-55
150
TL
Lead temperature (Soldering, 10 seconds)
-
300
†
IN- and IN+ contain clamping diodes between the two pins.
††
VAA -VSS, Vcc-COM and VB-VS contain internal shunt zener diodes. Please note that the
voltage ratings of these can be limited by the clamping current.
†††
For the rising and falling edges of step signal of 10V. Vss=15V to 200V.
††††
Per MOSFET
†††††
Repetitive rating, pulse width limited by max. junction temperature
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Recommended Operating Conditions
For proper operation, the device should be used within the recommended conditions below. The Vss and Vs
offset ratings are tested with supplies biased at COM=VN, VAA-VSS=9.6V, VCC=12V and VB-VS=12V. All voltage
parameters are absolute voltages referenced to COM; all currents are defined positive into any lead.
Symbol
Definition
Min.
Max.
Units
VP
Positive power supply rail voltage, without
heatsink
IR4301
-
62
V
IR4321
-
50
IR4311
-
32
Positive power supply rail voltage, with
heatsink
IR4301
-
68
IR4321
-
50
IR4311
-
32
VB
High side floating supply absolute voltage
VS +10
VS +14
VS
High side floating supply offset voltage
IR4301
†
80
IR4321
†
60
IR4311
†
40
VAA
Floating input positive supply voltage††
VSS + 4.5
VSS + 15
VSS
Floating input negative supply voltage††
IR4301
0
80
IR4321
0
60
IR4311
0
40
IAAZ
Floating input supply zener clamp current††
1
15
mA
ISSZ
Floating input negative supply zener clamp current††
1
15
VCC
Low side fixed supply voltage
10
15
V
VIC
IN- and IN+ pins common mode input voltage
VSS + 2
VAA - 2
VIN-
Inverting input voltage
VIN+ -0.5
VIN+ +0.5
VCSD
CSD pin input voltage
VSS
VAA
VCOMP
COMP pin input voltage
VSS
VAA
CCOMP
COMP pin phase compensation capacitor to GND
1
-
nF
VCSH
CSH pin input voltage
VS
VB
V
dVss/dt
Allowable Vss voltage slew rate upon power-up†††
-
50
V/ms
fSW
Switching Frequency
-
500
kHz
TA
Ambient Temperature
-40
100
C
† Logic operational for Vs equal to –5V to +80V. Logic state held for Vs equal to –5V to –VBS.
†† GND input voltage is limited by IAAZ and ISSZ.
††† Vss ramps up from 0V to 70V.
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Electrical Characteristics
VCC,VBS= 12 V, VSS=VS=VN=COM=0V, VAA=9.6V and TA=25C unless otherwise specified.
Symbol
Definition
Min
Typ
Max
Units
Test Conditions
Low Side Supply
UVCC+
Vcc supply UVLO positive
threshold
8.4
8.9
9.4
V
UVCC-
Vcc supply UVLO negative
threshold
8.2
8.7
9.2
V
UVCCHYS
UVCC hysteresis
-
0.2
-
V
IQCC
Low side quiescent current
-
-
3
mA
ICC
Low side operating current
-
5
-
mA
f=400kHz
VCLAMPL
Low side zener diode clamp
voltage
14.7
15.3
16.2
V
ICC=5mA
High Side Floating Supply
UVBS+
High side well UVLO
positive threshold
8.0
8.5
9.0
V
UVBS-
High side well UVLO
negative threshold
7.8
8.3
8.8
V
UVBSHYS
UVBS hysteresis
-
0.2
-
V
IQBS
High side quiescent current
-
-
2.4
mA
VCLAMPH
High side zener diode clamp
voltage
14.7
15.3
16.2
V
IBS=5mA
Floating Input Supply
UVAA+
VA+, VA- floating supply
UVLO positive threshold
from VSS
8.2
8.7
9.2
V
VSS =0V, GND
pin floating
UVAA-
VA+, VA- floating supply
UVLO negative threshold
from VSS
7.7
8.2
8.7
V
VSS =0V, GND
pin floating
UVAAHYS
UVAA hysteresis
-
0.5
-
V
VSS =0V, GND
pin floating
IQAA0
Floating Input positive
quiescent supply current
-
1
2
mA
VAA=9.6V, VSS
=0V,
VCSD =VSS
IQAA1
Floating Input positive
quiescent supply current
-
2
3
mA
VAA=9.6V, VSS
=0V,
VCSD =VAA
IQAA2
Floating Input positive
quiescent supply current
-
2.5
4
mA
VAA=9.6V, VSS
=0V,
VCSD =GND
ILKM
Floating input side to Low
side leakage current
-
-
50
µA
VAA=VSS=VGND=
100V
VCLAMPM+
VAA floating supply zener
diode clamp voltage,
positive, with respect to
GND
4.9
5.1
5.4
V
IAA=5mA,
ISS=5mA,
VGND=0V,
VCSD =VSS
VCLAMPM-
VSS floating supply zener
diode clamp voltage,
negative, with respect to
GND
-5.4
-5.1
-4.9
V
IAA=5mA,
ISS=5mA,
VGND=0V,
VCSD =VSS
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© 2013 International Rectifier
Electrical Characteristics (cont’d)
VCC,VBS= 12 V, VSS=VS=VN=COM=0V, VAA=9.6V and TA=25C unless otherwise specified.
Symbol
Definition
Min
Typ
Max
Units
Test Conditions
Audio Input (VGND=0, VAA=4.8V, VSS=-4.8V)
VOS
Input offset voltage
-18
0
18
mV
IBIN
Input bias current
-
-
40
nA
GBW
Small signal bandwidth
-
9
-
MHz
CCOMP=1nF,
Rf=0
gm
OTA transconductance
-
10
-
mS
VIN+=0V, VIN-
=10mV
GV
OTA gain
50
-
-
dB
PWM
VthPWM
PWM comparator threshold in
COMP
-
(VAA -VSS)/2
-
V
fOTA
COMP pin star-up local
oscillation frequency
0.7
1.0
1.5
MHz
VCSD =GND
Ton
COMP to VS rising edge
propagation delay
-
370
-
ns
Toff
COMP to VS trailing edge
propagation delay
-
320
-
ns
DT
Deadtime: Low-side turn-off to
High-side turn-on (DTLO-HO) &
High-side turn-off to Low-side
turn-on (DTHO-LO)
-
50
-
ns
VP=30V,
VN=-30V
Power MOSFET (FET1, FET2) (IR4301)
V(BR)DSS
Drain-to-Source breakdown
voltage
80
-
-
V
VGS=0V,
ID=250uA
RDS(ON)
FET on resistance
-
39
50
mΩ
VGS=10V, ID=3.3A
Qg
Total gate charge
-
7.3
-
nC
ILK0
VP leakage current, VS=VN
-
-
20
µA
VP=80V, VCSD
=VSS
ILK1
VP leakage current, VS=VP
-
-
50
µA
Power MOSFET (FET1, FET2) (IR4321)
V(BR)DSS
Drain-to-Source breakdown
voltage
60
-
-
V
VGS=0V,
ID=250uA
RDS(ON)
FET on resistance
-
30
40
mΩ
VGS=10V, ID=3.3A
Qg
Total gate charge
-
8.3
-
nC
ILK0
VP leakage current, VS=VN
-
-
20
µA
VP=60V, VCSD
=VSS
ILK1
VP leakage current, VS=VP
-
-
50
µA
Power MOSFET (FET1, FET2) (IR4311)
V(BR)DSS
Drain-to-Source breakdown
voltage
40
-
-
V
VGS=0V,
ID=250uA
RDS(ON)
FET on resistance
-
44
56
mΩ
VGS=10V, ID=3.6A
Qg
Total gate charge
-
4.5
-
nC
ILK0
VP leakage current, VS=VN
-
-
20
µA
VP=40V, VCSD
=VSS
ILK1
VP leakage current, VS=VP
-
-
50
µA
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Electrical Characteristics (cont’d)
VCC,VBS= 12 V, VSS=VS=VN=COM=0V, VAA=9.6V and TA=25C unless otherwise specified.
Symbol
Definition
Min
Typ
Max
Units
Test Conditions
Protection
IOCP
Positive OC threshold
-
16
-
A
IOCN
Negative OC threshold
-
-16
-
A
Vth1
CSD pin shutdown release
threshold
0.62xVAA
0.70xVAA
0.78xVAA
V
Vth2
CSD pin self-reset threshold
0.26xVAA
0.30xVAA
0.34xVAA
V
ICSD+
CSD pin discharge current
70
100
130
µA
VCSD = VSS
+4.8V
ICSD-
CSD pin charge current
70
100
130
µA
VCSD = VSS
+4.8V
tSD
Shutdown propagation delay
from VS < Vth1 to Shutdown
-
-
250
ns
COMP = VSS
tOCP
Propagation delay time from
IO > IOCP to Shutdown
-
-
500
ns
COMP = VSS
tOCN
Propagation delay time from
IO < IOCN to Shutdown
-
-
500
ns
COMP = VSS
TSD
Over temperature shutdown
threshold in controller IC
-
105
-
ºC
TSDHYS
Over temperature shutdown
threshold hysteresis
-
7
-
ºC
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Functional Bock Diagram
G
D
S
G
D
S
VP
VB
VS
COM
VN
VCC
GND
IN-
IN+
COMP
VSS
CSD
VAA
CSH
47
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© 2013 International Rectifier
Input/Output Pin Equivalent Circuit Diagrams
ESD
Diode
ESD
Diode
VAA
VSS
IN-
IN+ 5V
Zener
Diode
200 V
COM
GND
5V
Zener
Diode
ESD
Diode
ESD
Diode
VB
HO
VS
ESD
Diode
ESD
Diode
LO
COM
200 V
15 V
Clamp
VCC
VCC
15 V
Clamp
10k
G
D
S
G
D
S
CSH
VP
VN
ESD
Diode
ESD
Diode
VAA
COMP
or CSD
VSS
ESD
Diode
ESD
Diode
VCC
DT, VREF
or
OCSET
COM
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© 2013 International Rectifier
Lead Definitions
Pin #
Symbol
Description
1
VAA
Floating input positive supply
2
GND
GND for internal shunt zener diodes to VAA and VSS
3
IN+
Analog non-inverting input
4
IN-
Analog inverting input
5
COMP
PWM comparator input
6
CSD
Shutdown timing capacitor / shutdown input
7
VSS
Floating input negative supply
8
VCC
Low side supply
9
COM
Low side supply return, internally connected to VN
10
VN
Negative power supply, internally connected to COM externally
11
VS
PWM output
12
VP
Positive power supply
13
VB
High side floating supply, referenced to VS
14
CSH
High side over current sensing input, referenced to VS
15
SUB
Internally connected to COM (Do not use as supply return)
Lead Assignments (Top View)
12 11 10
15 9
8
7
13
14
654321
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© 2013 International Rectifier
Package Details
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© 2013 International Rectifier
Board Mounting Information
Refer to Application Note AN-1170 Audio Power Quad Flat No-Lead (PQFN) Board Mounting Application Note.
Part Marking Information
Ordering Information
Base Part Number
Package Type
Standard Pack
Complete Part Number
Form
Quantity
IR4301M
PQFN22 5x6mm
Tape and Reel
4000
IR4301MTRPBF
IR4321M
PQFN22 5x6mm
Tape and Reel
4000
IR4321MTRPBF
IR4311M
PQFN22 5x6mm
Tape and Reel
4000
IR4311MTRPBF
The information provided in this document is believed to be accurate and reliable. However, International Rectifier assumes no responsibility
for the consequences of the use of this information. International Rectifier assumes no responsibility for any infringement of patents or of
other rights of third parties which may result from the use of this information. No license is granted by implication or otherwise under any
patent or patent rights of International Rectifier. The specifications mentioned in this document are subject to change without notice. This
document supersedes and replaces all information previously supplied.
For technical support, please contact IR’s Technical Assistance Center
http://www.irf.com/technical-info/
WORLD HEADQUARTERS:
101 N. Sepulveda Blvd., El Segundo, California 90245
Tel: (310) 252-7105
April 22, 2013