IR43x2
1 www.irf.com © 2013 International Rectifier Apr 3, 2013
Features
2 channel integrated analog input Class D audio
amplifier in a small 7 x 7 mm PQFN44 package
No mechanical heatsink required
High peak music power output
Split or single power supply
Differential or single-ended input
Over-current, over-temperature and under
voltage protections with self-reset feature
Start/stop click noise reduction
Clip and Fault reporting outputs
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
Product Summary
Topology Half-Bridge,
Full-Bridge
130 W/ 4 Ω
IR4302 Output power
(Typical, THD+N=10%) 100 W/ 3 Ω
100 W/ 4 Ω
IR4322 Output power
(Typical, THD+N=10%) 100 W/ 2 Ω
35 W/ 4 Ω
IR4312 Output power
(Typical, THD+N=10%) 40 W/ 3 Ω
*Residual noise
(AES-17, IHF-A, typical) 250 μVrms
*THD+N
(1kHz, 1W, 4 Ω, typical) 0.02 %
* In typical application example
Package
7x7mm PQFN44L
Typical Connection
IR43x2
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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 14
Lead Assignments 15
Package Details 16
Part Marking Information 17
Ordering Information 17
IR43x2
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Description
The IR43x2 integrates 2 channel 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 IR43X2
operates 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 7x7 mm
PQFN package enhances the benefit of smaller size of Class D topology. The IR43X2 series is a lead-free, ROHS
compliant.
Typical Connection Diagram
1. Inverting Amplifier
2. Differential Amplifier
IR43x2
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3. Single Power Supply (Inverting Amplifier)
Qualification Information†
Industrial††
Qualification Level 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)
Machine Model Class A
(per JEDEC standard EIA/JESD22-A115)
IR4302M
IR4322M
Class 1B
(per EIA/JEDEC standard JESD22-A114)
ESD Human Body Model
IR4312M Class 1A
(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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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=VN1=VN2; 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
IR4302 - 80
IR4322 - 60
VPn Positive power supply rail voltage, n=1-2
IR4312 - 40
IR4302 -0.3 95
IR4322 -0.3 75
VBn High side floating supply voltage
IR4312 -0.3 55
VSn High side floating supply voltage††, n=1-2 VBn -15 VBn +0.3
VCSHn CSH pin input voltage, n=1-2 VSn -0.3 VBn +0.3
VCC Low side supply voltage†† -0.3 15
IR4302 -0.3 100
IR4322 -0.3 70
VAA Floating input positive supply voltage††
IR4312 -0.3 50
VSS Floating input negative supply voltage†† -1
(See ISSZ) GND +0.3
VIN+n Floating input supply ground voltage , n=1-2 VSS -0.3 VAA +0.3
V
IINn Input current between IN- and IN+ pins†, n=1-2 - ±3 mA
VCSD CSD pin input voltage VSS -0.3 VAA +0.3
VCOMPn COMP pin input voltage, n=1-2 VSS -0.3 VAA +0.3
VCLIP CLIP pin input voltage GND -0.3 VAA +0.3
V
ICLIP CLIP pin sinking current - 5 mA
VFAULT FAULT pin input voltage GND -0.3 VAA +0.3 V
IFAULT FAULT pin sinking current - 5
IAAZ Floating input supply zener clamp current†† - 20
ISSZ Floating input negative supply zener clamp current†† - 20
ICCZ Low side supply zener clamp current††† - 20
IBSZn Floatin
g
su
pp
l
y
zener clam
p
current
†††
, n=1-2 - 20
mA
dVSn/dt Allowable Vs voltage slew rate, n=1-2 - 50 V/ns
dVSS/dt Allowable Vss voltage slew rate††† - 50 V/ms
IR4302 6.5
IR4322 7.0
Id@ 25ºC Continuous output current, from VPn to VSn, VSn
to VNn, VCC=10V, VBn-VSn=10V IR4312
-
3.6
IR4302 5.4
IR4322 5.8
Id@ 100ºC Continuous output current, from VPn to VSn, VSn
to VNn, VCC=10V, VBn-VSn=10V IR4312
-
2.9
IR4302 26
IR4322 28
IDM Pulsed output current, from VPn to VSn, VSn to
VNn, VCC=10V, VBn-VSn=10V††††† IR4312
-
15
A
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IR4302 25
IR4322 25
Pd Power dissipation†††† @ TC = 25C
IR4312
-
8 W
IR4302 5
IR4322 5
RthJC Thermal resistance, junction to ambient††††
IR4312
-
- 14 C/W
TJIC Control IC junction temperature - 150
TJFET FET junction temperature - 150
TS Storage Temperature -55 150
TL Lead temperature (Soldering, 10 seconds) - 300
C
† IN- and IN+ contain clamping diodes between the two pins.
†† VAA -VSS, Vcc-COM and VBn-VSn contain internal shunt zener diodes. 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 Vsn
offset ratings are tested with supplies biased at COM=VN1=VN2, VAA-VSS=9.6V, VCC=12V and VBn-VSn=12V. All
voltage parameters are absolute voltages referenced to COM; all currents are defined positive into any lead.
Symbol Definition Min Max Units
IR4302 - 46
IR4322 - 46
Positive power supply voltage, n=1-2, without
heatsink
IR4312 - 32
IR4302 - 62
IR4322 - 50
VPn
Positive power supply voltage, n=1-2, with
heatsink
IR4312 - 32
VBn High side floating supply absolute voltage, n=1-2 VSn +10 VSn +14
IR4302 † 80
IR4322 † 60
VSn High side floating supply offset voltage, n=1-2
IR4312 † 40
VAA Floating input positive supply voltage†† VSS + 4.5 VSS + 15
IR4302 0 80
IR4322 0 60
VSS Floating input negative supply voltage††
IR4312 0 40
V
IAAZ Floating input supply zener clamp current†† 1 15
ISSZ Floating input negative supply zener clamp current†† 1 15
mA
VCC Low side fixed supply voltage 10 15
VIC IN- and IN+ pins common mode input voltage VSS + 2 VAA - 2
VIN-n Inverting input voltage, n=1-2 VIN+ -0.5 VIN+ +0.5
VCSD CSD pin input voltage VSS V
AA
VCOMPn COMP pin input voltage, n=1-2 VSS V
AA
V
CCOMPn COMP pin phase compensation capacitor to GND , n=1-2 1 - nF
VCSHn CSH pin input voltage, n=1-2 VSn V
Bn 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.
IR43x2
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Electrical Characteristics
VCC,VBS= 12 V, VSS=VS1=VS2=VN1=VN2=COM=0V, VAA=9.6V and TA=25C unless otherwise specified.
Symbol
Definition
Min
Typ
Max
Units
T
est 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 supply current - 10 - mA f=400kHz
VCLAMPLn Low side zener diode clamp
voltage, n=1-2 14.7 15.3 16.2 V ICC=5mA
High Side Floating Supply
UVBS+n High side well UVLO
positive threshold, n=1-2 8.0 8.5 9.0 V
UVBS-n High side well UVLO
negative threshold, n=1-2 7.8 8.3 8.8 V
UVBSHYSn UVBS hysteresis, n=1-2 - 0.2 - V
IQBSn High side quiescent current,
n=1-2 - - 2.4 mA
VCLAMPHn High side zener diode clamp
voltage, n=1-2 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 - 1.5 3 mA
VAA=9.6V, VSS
=0V,
VCSD =VSS
IQAA1 Floating Input positive
quiescent supply current - 4 6 mA
VAA=9.6V, VSS
=0V,
VCSD =VAA
IQAA2 Floating Input positive
quiescent supply current - 5 7.5 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
IR43x2
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Electrical Characteristics (cont’d)
VCC,VBS= 12 V, VSS=VS1=VS2=VN1=VN2=COM=0V, VAA=9.6V and TA=25C unless otherwise specified.
Symbol
Definition
Min
Typ
Max
Units
T
est Conditions
Audio Input (VGND=0, VAA=4.8V, VSS=-4.8V)
VOSn Input offset voltage, n=1-2 -18 0 18 mV
IBINn Input bias current, n=1-2 - - 40 nA
GBWn Small signal bandwidth in
OTA, n=1-2 - 9 - MHz
CCOMP=1nF,
Rf=0
gmn OTA transconductance, n=1-2 - 10 - mS VIN+=0V, VIN-
=10mV
GVn OTA gain, n=1-2 50 - - dB
PWM
VthPWM PWM comparator threshold in
COMP - (VAA -
VSS)/2 - V
fOTAn COMP pin star-up local
oscillation frequency, n=1-2 0.7 1.0 1.5 MHz VCSD =GND
Ton_n COMP to VS rising edge
propagation delay, n=1-2 - 370 - ns
Toff_n COMP to VS trailing edge
propagation delay, n=1-2 - 320 - ns
DTn
Deadtime: Low-side turn-off to
High-side turn-on (DTLO-HO) &
High-side turn-off to Low-side
turn-on (DTHO-LO) , n=1-2
- 50 - ns
VP=30V,
VN=-30V,
Power MOSFET (FET1, FET2, FET3, FET4) (IR4302)
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
ILK1 VP leakage current, VS=VP - - 50 µA
VP=80V, VCSD
=VSS
Power MOSFET (FET1, FET2, FET3, FET4) (IR4322)
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
ILK1 VP leakage current, VS=VP - - 50 µA
VP=60V, VCSD
=VSS
Power MOSFET (FET1, FET2, FET3, FET4) (IR4312)
V(BR)DSS Drain-to-Source breakdown
voltage 40 - - V
VGS=0V,
ID=250uA
RDS(ON) FET on resistance - 44 56 mΩ I
D=3.6A
Qg Total gate charge - 4.5 - nC VGS=10V
ILK0 VP leakage current, VS=VN - - 20 µA VP=40V, VCSD
=VSS
ILK1 VP leakage current, VS=VP - - 50 µA
IR43x2
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Electrical Characteristics (cont’d)
VCC,VBS= 12 V, VSS=VS1=VS2=VN1=VN2=COM=0V, VAA=9.6V and TA=25C unless otherwise specified.
Symbol
Definition
Min
Typ
Max
Units
T
est Conditions
Protection
IOCPn Over current detection
Positive threshold, n=1-2 - 16 - A
IOCNn Over current detection
Negatitive threshold, n=1-2 - -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
tSDn
Shutdown propagation delay
from VS < Vth1 to Shutdown,
n=1-2
- - 250 ns COMP = VSS
tOCPn
CHn propagation delay time
from IOn > IOCPn to Shutdown,
n=1-2
- - 500 ns COMP = VSS
tOCNn
CHn propagation delay time
from IOn < IOCNn to Shutdown,
n=1-2
- - 500 ns COMP = VSS
Vth+CLIP Clip detection positive
threshold in COMP 0.85xVAA 0.90xVAA 0.95xVAA V
Vth-CLIP Clip detection negative
threshold in COMP 0.05xVAA 0.10xVAA 0.15xVAA V
tCLIP Clipping detection
propagation delay - 40 - ns
tCLIPmin Clipping detection minimum
output duration - 3 - us
TSD Over temperature shutdown
threshold in controller IC - 105 - ºC
TSDHYS Over temperature shutdown
threshold hysteresis - 7 - ºC
IR43x2
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Functional Bock Diagram
IR43x2
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Input/Output Pin Equivale nt Circuit Diagrams
ESD
Diode
ESD
Diode
VBn
HOn
VSn
ESD
Diode
ESD
Diode
LOn
COM
200 V
15 V
Clamp
VCC
VCC
15 V
Clamp
COM2
10k
G
D
S
G
D
S
CSHn
VPn
VNn
IR43x2
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Input/Output Pin Equivalent Circuit Diagrams (Cont’d)
ESD
Diode
ESD
Diode
VAA
CSD
VSS
CHARGE
DISCHARGE
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Lead Definitions
Pin #
Symbol Description
1 CLIP Clipping detection output, open drain, referenced to GND
2 COMP2 CH2 PWM comparator input
3 IN-2 CH2 Analog inverting input
4 IN+2 CH2 Analog non-inverting input
5 GND GND for internal shunt zener diodes to VAA and VSS
6 VSS Floating input negative supply
7 VAA Floating input positive supply
8 IN+1 CH1 Analog non-inverting input
9 IN-1 CH1 Analog inverting input
10 COMP1 CH1 PWM comparator input
11 CSD Shutdown timing capacitor / shutdown input
12 FAULT Fault reporting output, open drain, referenced to GND
13 NC
14 VCC Low side supply
15 COM Low side supply return, internally connected to pin 31
16 CSH1 CH1 High side over current sensing input, referenced to VS1
17 VB1 CH1 High side floating supply
18 VS1 CH1 PWM output, internally connected to pin 20
19 VP1 CH1 Positive power supply
20 VS1 CH1 PWM output
21 VN1 CH1 Negative power supply, connect to COM externally
22 VN2 CH2 Negative power supply, connect to COM externally
23 VS2 CH2 PWM output, internally connected to pin 25
24 VP2 CH2 Positive power supply
25 VS2 CH2 PWM output
26 VB2 CH2 High side floating supply
27 CSH2 CH2 High side over current sensing input, referenced to VS2
28 COM Low side supply return, internally connected to pin 31
29 NC
30 NC
31 COM Low side supply return
IR43x2
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Lead Assignments (Top View)
IR43x2
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Package Details
IR43x2
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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
Standard Pack
Base Part Number Package Type Form Quantity
Complete Part Number
IR4302M PQFN44
7x7mm Tape and Reel 3000 IR4302MTRPBF
IR4322M PQFN44
7x7mm Tape and Reel 3000 IR4322MTRPBF
IR4312M PQFN44
7x7mm Tape and Reel 3000 IR4312MTRPBF
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
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