IRAUDAMP22 - International Rectifier

IR43x2

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

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

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

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.

IR43x2

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

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

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

zener clam

current

†††

, n=1-2 - 20

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

IR43x2

IR4302 25

IR4322 25

Pd Power dissipation†††† @ TC = 25C

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

IR43x2

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

IAAZ Floating input supply zener clamp current†† 1 15

ISSZ Floating input negative supply zener clamp current†† 1 15

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

VCOMPn COMP pin input voltage, n=1-2 VSS 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

Electrical Characteristics

VCC,VBS= 12 V, VSS=VS1=VS2=VN1=VN2=COM=0V, VAA=9.6V and TA=25C unless otherwise specified.

Symbol

Definition

Min

Typ

Max

Units

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

Electrical Characteristics (cont’d)

VCC,VBS= 12 V, VSS=VS1=VS2=VN1=VN2=COM=0V, VAA=9.6V and TA=25C unless otherwise specified.

Symbol

Definition

Min

Typ

Max

Units

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

Electrical Characteristics (cont’d)

VCC,VBS= 12 V, VSS=VS1=VS2=VN1=VN2=COM=0V, VAA=9.6V and TA=25C unless otherwise specified.

Symbol

Definition

Min

Typ

Max

Units

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



Functional Bock Diagram

IR43x2

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

15 V

Clamp

COM2

10k

CSHn

VPn

VNn

IR43x2

Input/Output Pin Equivalent Circuit Diagrams (Cont’d)

ESD

Diode

ESD

Diode

VAA

CSD

VSS

CHARGE

DISCHARGE

IR43x2

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

Lead Assignments (Top View)

IR43x2

Package Details

IR43x2

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