L15D two channel digital amplifier IRS2092 IRFI4019H (IRAUDAMP7S)
Digital power amplifier designed by LJM.One board is one channelThe DIY kit requires you to assemble and solder yourself.
Suggested working voltage and transformer power
The load is 8 ohms, the transformer voltage is AC 40V, ±DC 55V, and the power is 150W per channel. 300W two channels. Filter capacitor 6800UF*2 or moreLoad 4 ohms, transformer voltage AC dual 35V, ±DC 48V power 250W per channel. 500W two channels. Filter capacitor 10000UF*2 or moreLoad 4 ohm ±8V DC, 300W 4R mono power. 700W dual-channel power. It is recommended that the transformer voltage is AC dual 41V 1000W.
About IRAUDAMP7S official introduction indicators.
Applications ? AV receivers? Home theater systems? Mini component stereos? Powered speakers? Sub-woofers? Musical Instrument amplifiers? Automotive after market amplifiers Features Output Power: Scalable output power from 25W- 500W (see Table 1)Residual Noise: 200 μV, IHF-A weighted, AES-17 filterDistortion: 0.007% THD+N @ 60W, 4 RMultiple Protection Features: Over-current protection (OCP), high side and low side MOSFETOver-voltage protection (OVP),Under-voltage protection (UVP), high side and low side MOSFETDC-protection (DCP),Over-temperature protection (OTP)PWM topology: Self-oscillating PWM, half-bridge or full-bridge topologies selectable
Introduction: Operating voltage DC + -55V (between + -50V and + -60V)+ -55V OUTPUT power = 150W 8R RMS. 300W 4R RMS.Use SAGAMI specification digital power amplifier special inductor, 14A current 0.013 ohm impedance value.Fully shielded, low radiation, low distortion design. Use IR's D-type program design model IRAUDAMP7S as a template.Using high-end class D amplifier driver IC IRS2092. Achieve the current minimal distortion, the maximum output power of 500W.Use IR official standard configuration MOSFET audio dedicated MOSFET output tube, MOSFET.By providing the new IRFI4xxxH-117P series of MOSFET half-bridges, IR has improved many performances of Class D audio power amplifiers.The integrated half-bridge package mode reduces the number of components in half and improves the PCB layout. In addition to low on-resistance, this series of MOSFET half-bridges also have optimized gate charge, parasitic diode reverse recovery capability and internal gate resistance. These have improved the performance and effect of Class D audio amplifiers, the main parameters such as working efficiency, total harmonic distortion and electromagnetic radiation.The typical on-resistance RDS(ON) of IRFI4xxxH-117P is 80 mOhms, and the typical gate charge is 13NC, and the switch charge is 4.1NC. Adopt high-power, high-current, low-impedance fully shielded inductors dedicated to digital power amplifiers. It has a very small resistance value=0.013 ohm actual measurement, current=14A. Very small radiation and interference, large current, and higher frequency operating parameters.Make the distortion of the digital power amplifier reach the lowest level
This is a special inductor for digital power amplifiers, which is different from ordinary digital power discharge inductive resistance measurement.The resistance value of the special inductor is only 0.013 ohms, the current is 14A, and the OFC copper wire is used. Compared with the ordinary audio inductor, the red 94-2 iron powder core, 1MM enameled wire, the resistance is 0.036 ohm. The resistance value of the latter is 3 times larger, and the current value is much smaller.
Amplifier test chart, actual measurement: