Beseyun LJM L15DSMD IRS2092S 250W Class D Mono Digital Power Amplifier Board

L15DSMD IRS2092S 250W Class D Mono Digital Power Amplifier Board

Recommended 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 more

Load 4 ohms, transformer voltage AC dual 35V, + -DC 48V power 250W per channel.500W two channels.Filter capacitor 10000UF*2 or more

Load 4 ohm + -58V DC, 300W 4R mono power.700W dual-channel power.The recommended transformer voltage is AC dual 41V 1000W.






It uses IRS2092S and IRFI4020H digital power amplifier dedicated chips.All use high-quality imported chips, MOSFETs.Large-capacity aluminum electrolytic capacitors imported from Japan.

Parameter introduction:

Operating voltage DC + -50V (between + -33V and + -55V) + -50V OUTPUT power = 125W 8R RMS.250W 4R RMS.

Size: length, width and height: 100MM*58MM*42MM

The distance of the mounting holes is: 91.5MM horizontal, 49.5 MM vertical

Distortion: Distortion: 0.007% THD+N @ 60W, 4 Ω

Voltage gain: Voltage Gain 36

Load Impedance Drive impedance: 4 Ω

Total Idle Power Consumption, no-load idle power consumption: 7W

Channel Efficiency: 90% 250W 4 Ω

Dynamic Range: 101 DB

Residual Noise: 200UV

Frequency Response: 20HZ-35K HZ + -3DB

Temperature performance: Thermal Performance: 30W power, 55C degrees Celsius

250W power, 90C degrees Celsius


The figure below has a white background, this is the actual measurement data of LJM

The voltage is + -50V and the impedance is 8 ohms.If you are interested, you can download the big picture.

Actual measurement of L15DSMDV3 version

When the THD+N output power is about 10.1 V RMS

THD+N = 0.006%- 0.008% or so

 

Frequency response graph-actual measurement: (The digital power amplifier will have a little upward gain when measured in an 8 ohm load due to the filter, which will not be displayed in 4 ohms.This measurement data is consistent with the IR)

Comparison of test images of the DEMO version of the IR company:

THD+N Test Chart

HD+N distortion plus noise amplitude value graph can be understood as a dynamic distortion graph.The white background is the actual LJM measurement.The yellow background is the sample of the IR company, which can be used as a comparison

 

 

THD+N Test Data




Use the latest 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 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 lower 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.