Amplifier Circuit DiagramsPower Supplies

AMPLIFIER POWER SUPPLY AND PROTECTION CIRCUITS Schematic Circuit Diagram

Power supply circuits suitable for various applications such as amphibious setups and preamplifiers come in both low-power and high-power designs. Typically, these circuits incorporate protection mechanisms in their printed circuit board (PCB) designs. Mile Slavkovic’s APEX series simplifies professional designs, offering a plethora of projects shared online that can be adapted and utilized across multiple circuits.

APEX ACTIVE DC SERVO REGULATOR

DC servo regulator circuits utilizing LM78XX, LM79XX, LM317, and LM337 involve two distinct PCB designs for integrating regulators. These circuits ensure stable output voltage regulation, particularly in hi-fi applications, by employing the NE5532 op-amp. In these regulated circuits, the filter capacitors’ values after DC rectification are relatively high, with 4700uF specified. However, 2200uF proves to be more than sufficient, offering comparable performance.

AMPLIFIER POWER SUPPLY AND PROTECTION CIRCUITS Schematic Circuit Diagram 1

APEX AX11 POWER SUPPLY + SPEAKER PROTECTION

A power supply ranging from 100W to 200W, designed for amplifiers, incorporates a Zobel filter and protective fuses in the amplifier’s output to guard against stray DC voltage. The filter coil features a bridge diode and filter capacitors, wound 24 times with a pitch of 1.2 mm. Additionally, a 24V relay is used on the PCB to control the speaker line.

AMPLIFIER POWER SUPPLY AND PROTECTION CIRCUITS Schematic Circuit Diagram 2

APEX APEX PSU PROTEC

This power supply circuit is integrated with a sophisticated protection mechanism. It automatically disconnects the speaker connection and interrupts the DC voltage generated at the amplifier output when high current is drawn from the power supply. It provides +56V to -56V output for amplifier input, symmetrical +12V and -12V output for tone control, and a 24V fan output.

AMPLIFIER POWER SUPPLY AND PROTECTION CIRCUITS Schematic Circuit Diagram 3

APEX PSU7 POWER SUPPLY SOFT START SPEAKER PROTECTION

Designed for 300W … 500W high power amp, 220V soft stary line speaker with DC protection circuit and DC rectification section.

AMPLIFIER POWER SUPPLY AND PROTECTION CIRCUITS Schematic Circuit Diagram 4

In high power circuits, the path thicknesses may not be sufficient, you may need to reinforce with solder the source pcb files of all power supply circuits have pcb drawings prepared with sprint layout.

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