IR43x1 Features Product Summary Integrated analog input Class D audio amplifier in a small 5 x 6 mm PQFN package Half-Bridge, Topology High peak music power output Full-Bridge No mechanical heatsink required 160 W/ 4 *IR4301 Output power Split or single power supply (Typical, THD+N=10%) Differential or single-ended input 120 W/ 3 Over-current, over-temperature and under 90 W/ 4 *IR4321 Output power voltage protections with self-reset function (Typical, THD+N=10%) Start and stop click noise reduction 135 W/ 2 High noise immunity 35 W/ 4 RoHS compliant *IR4311 Output power (Typical, THD+N=10%) 45 W/ 3 *Residual noise 250 Vrms (AES-17, IHF-A, typical) *THD+N 0.02 % Typical Applications (1kHz, 1W, 4 , typical) Home theatre systems * In typical application example Docking station audio systems PC audio systems Package Musical instruments Karaoke amplifiers Game consoles Powered speaker systems General purpose audio power amplifiers 5x6mm PQFN22 Typical Connection +B CSH VB VP VAA GND IN+ IN- VS INPUT COMP Speaker CSD VSS COM VN VCC VCC -B 1 www.irf.com 2013 International Rectifier IR43x1 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 2 www.irf.com 2013 International Rectifier