InternationalRectifier ClassD 4x160W free download

File name InternationalRectifer-ClassD4x160W.pdf

IRAUDAMP3 120W x 6 Channel Class D Audio Power Amplifier using IRS20124S and IRF6645 By Jun Honda, Johan Strydom and Jorge Cerezo Table of Contents Page Introduction ... 1 Specifications ... 2 Functional Description... 4 Protection ...11 Typical Performance ...15 Design Documents ...20 The IRAUDAMP3 reference design is an example of a complete six-channel 120W half-bridge Class D audio power amplifier. The reference design is intended to demonstrate how to use the IRS20124S, implement protection circuits, and design an optimum PCB layout using IRF6645 DirectFET® MOSFETs. The modular design consists of a motherboard with three identical daughter boards. The resulting design requires no heat-sinking for normal operation. The reference design includes all the required housekeeping power supplies for ease of use. www.irf.com Introduction The IRAUDAMP3 reference design is an example of a complete six-channel 120W halfbridge Class D audio power amplifier. The reference design is intended to demonstrate how to use the IRS20124S, implement protection circuits, and design an optimum PCB layout using IRF6645 DirectFET® MOSFETs. The modular design consists of a motherboard with three identical daughter boards. The resulting design requires no heatsinking for normal operation. The reference design includes all the required housekeeping power supplies for ease of use. Applications AV receivers Home theater systems Mini component stereos Sub-woofers Features Output power: Residual noise: Distortion: Efficiency: Multiple protection features: PWM modulator: 120W x 6 Channels, (THD = 1%) 56µV, IHF-A weighted, AES-17 filter 0.01% THD+N @ 60W, 4 94% @ 120W, 4single channel driven, Class D stage OCP, OVP, UVP, DC protection, OTP Self-oscillating half-bridge topology with optional clock synchronization www.irf.com 1 Specifications General Test Conditions (unless otherwise noted) Notes / Conditions Supply Voltage ±35V Load Impedance 4 Self-Oscillating Frequency (Adjustable) 400kHz No input signal Gain Setting 26dB 1Vrms input sensitivity Electrical Data IR Devices Used Modulator Power Supply Range Output Power CH1-6: (1% THD+N) Output Power CH1-6: (10% THD+N) Rated Load Impedance Damping Factor Supply Current Total Idle Power Consumption Board Efficiency ± 25-35V 120W 170W 4 40 <250mA 14W 94% (Typical) Notes / Conditions IRS20124S gate driver, IRF6645 DirectFET MOSFET Self-oscillating, 2nd order Sigma-Delta modulation, analog input 1kHz 1kHz 1kHz, relative to 4 load No input signal No inp