dx1000

Compact class D power amplifier module with protection systems.

The amplifier features high output power, small size, vanishingly low distortion and an high dynamics. The amplifier is based on specialized driver from International Rectifier IRS2092. It’s a self-oscilating PWM modulator operating in a sigma-delta system. For high performance switching dx1000 uses dedicated IRFB4227 power transistors which are characterized by short rise and fall times, operates in half-bridge topology, driven by TC4420 drivers. The whole is mounted on two-layer PCB.

 

 

Primary parameters:

Rated output power……………………………………………1000W/4ohm, 500W/8ohm (at 2x95V DC)
Power supply voltage range………………………………..2x75V – 2x100V DC
Recomended power supply voltage………………………2x95VDC

Frequency response…………………………………………….20Hz – 20kHz (-3dB)

Efficiency…………………………………………………………..max. 90%

THD+N…………………………………………………………….0.1% (at 2x95VDC, 4ohm, 50% Pmax)

Input sensitivity………………………………………………….1V
Input impedance…………………………………………………100k

Dimensions………………………………………………………..9,8cm x 14,2cm

 

 

Protection system realizes the following functions:

  • DC-protection
  • delayed turn on of load
  • current limiter
  • short circuit protecion
  • over-temperature protecion
  • over-voltage protecion
  • under-voltage protection

 

Documentation:

 

CIRCUIT DIAGRAM – PDF
START-UP(eng. version in progress)
BILL OF MATERIALS – PDF
COMPONENTS COLLOCATION – PDF

 

 

Photos:

 

 

Power supply

Although IRS2092 needs a several types of voltages, only one symetrical DC voltage is required. This is due to fact that dx1000 has on-board voltage regulators: +/-5V and -14V. If you decide to use a classical power supply with toroidal or EI transformer we recommend to use a transformer which has power equal to power amplifier output. For filtering voltage we recommend to use the battery consisting of four 10 000uF capacitors.
An alternative solution is to use switch mode power supply. Although this is a much more complicated system than the conventional transformer power supply, however, it has several major advantages: high efficiency, low weight, small ripple, no hum, working at frequencies far outside the range of the audio, optional opportunity to stabilize the output voltage.

 

We are pleased to inform that underway on switch mode power supply, with different powers, also adopted to dx1000.

 

 

Protection systems

dx1000 has been equipped with a number of protections. The most important of them includes over current and short circuit protecion. IRS2092 controls current both lower and upper mosfets. When short circuit or overload of output stage occurs, amplifer switches off for split second and then restarts. There is also under & over voltage protections.

 

PCB ordering

In order to buy PBCs please contact with us using contact form.