200 watt amp MOSFET amplifier schematic using Philips transistors

This 200 watt amp MOSFET amplifier schematic power amplifier electronic circuit is designed by Philips Semiconductor and is capable to deliver a maximum of 200 watts of high quality audio RMS power into a 4 W loudspeaker . This 200 watt amp MOSFET amplifier schematic circuit is a Class D High Power Audio Amplifier based on discrete components . This high power audio amplifier was designed by Philips Semiconductor to illustrate capability of the capability of Philips Power MOSFETs in discrete high-end PWM audio amplifier applications . if you want to use it a high output power you will need to attach an appropriate heatsink to the MOSFETs and you need a and a well dimensioned power supply .

The audio amplifier require a power supply that can deliver a voltage between 30 and 45 volts .  For 200 watts output power you will need a 45 input voltage . The power supply used for this amplifier circuit must be a dual voltage supply (+/-30 to +/-45 volts) .
Main features of this audio amplifier circuit are  :
VP supply voltage ±30 V to ±45 V , PL output power VP = ±45 V RL = 4 W appropriate heatsink needed 200 W (RMS)high efficiency PL = 100 W RL = 4 W > 92 % , THD+N (total harmonic distortion-plus-noise) PL = 10 W  frequency range from 20 Hz to 20 kHz < 0.03 % , S/N signal-to-noise ratio > 120 dB , fPWM PWM frequency idle ~ 400 kHz , Voffset offset voltage DC value < 50 mV .

Connectors and jumpers specifications
J1 audio in - signal use together with J2
J2 audio in - ground use together with J1
J3 amplifier enable when connected to ground (J4) the amplifier is enabled
J4 ground use together with J3
J5 positive supply voltage 30 V to 45 V (no need for a stabilized power supply)
J6 positive current sense can optionally be used in an overcurrent protection scheme
J7 power supply ground 0 V
J8 negative current sense can optionally be used in an overcurrent protection scheme

J9 negative supply voltage -30 V to -45 V (no need for a stabilized power supply)

J10 loudspeaker output use together with J11
J11 loudspeaker ground use together
This audio amplifier circuit has a very compact design , so you will need to connect separately an ‘short-circuit and overcurrent protection’ circuit that must be used together with the ‘electronic enabling/disabling’ circuit.
Bellow (left side is circuit protection , right side is audio amplifier )you can see an protection circuit that is presented by Philips Semiconductor  .

Values for this protection circuit are :
R1, R4 270
R2, R3 4.7 k
R5, R6, R7, R8, R9, R10, R11, R12 10 k
C1, C2 4.7 nF
D1, D5 Philips PDZ10B
D2, D3, D4, D6 Philips PDZ5.1B
Q1 Philips BC846
Q2 Philips BC856
IC1, IC2 Fast operational amplifier; feed with +12 V and
-12 V supplies
IC3 Philips HEF4071; feed with 5 V