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IRAUDAMP9 Datasheet(PDF) 3 Page - International Rectifier |
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IRAUDAMP9 Datasheet(HTML) 3 Page - International Rectifier |
3 / 39 page www.irf.com IRAUDAMP9 REV 1.0 Page 3 of 39 Introduction The IRAUDAMP9 reference design is a single-channel 1.7-kW ( @ 2Ω load) half-bridge Class D audio power amplifier. This reference design demonstrates how to use the IRS2092S Class D audio controller and external gate buffer, to implement protection circuits, and design an optimum PCB layout using the IRFB4227 (x 2 Pairs) TO-220 MOSFETs. This reference design may require additional heatsink or fan for normal operation (one-eighth of continuous rated power). The reference design provides all the required housekeeping power supplies for ease of use. The 1-channel design is capable of delivering higher than its rated power with provision of larger heat sink ( Rth <2° C / W). Applications • Pro-Audio amplifiers • Powered speakers • Active Sub-woofers • P.A. Systems • Car audio amplifiers Musical Instrument amplifier Features Output Power: 1.7 kW Single channel (2 Ω load, 1kHz, THD+N=10%), Residual Noise: 290 μV, IHF-A weighted, AES-17 filter Distortion: 0.07% THD+N @ 600W, 2Ω Efficiency: 97% @ 1.7 kW, 2Ω Multiple Protection Features: Output Over-current protection (OCP), high side and low side Input Over-voltage protection (OVP), Input Under-voltage protection (UVP), Output DC-offset protection (DCP), Over-temperature protection (OTP) PWM Modulator: Self-oscillating half-bridge topology with optional clock synchronization Specifications General Test Conditions (unless otherwise noted) Notes / Conditions Supply Voltages ±75V Load Impedance 2Ω Self-Oscillating Frequency 300kHz No input signal, Adjustable Gain Setting 33dB 1Vrms input yields 1-kW sinusoidal output power Electrical Data Typical Notes / Conditions IR Devices Used IRS2092S Audio Controller and Gate-Driver, IRFB4227 (x 2 Pairs) TO-220 MOSFETs Modulator Self-oscillating, second order sigma-delta modulation, analog input Power Supply Range ± 48V to ±80V Bipolar power supply Output Power CH1: (1% THD+N) 1200W 1kHz Sinewave Output Power CH1: (10% THD+N) 1700W 1kHz Sinewave Rated Load Impedance 2 Ω Non-inductive Resistive load Idling Supply Current +67mA , -105mA No input signal Total Idle Power Consumption 13.2 W No input signal System Efficiency 97% 94% 74 % @ +/- 75V 1.7 kW, 2Ω @ +/- 75V 1.2 kW, 2Ω @ +/- 75V 125 W (1/8 Po-rated), 2Ω |
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