190W RMS output stage amplifier circuit PCB printed circuit design darlington transistors are used TIP142 TIP147 very good original Car where there is no difference. Darlington amplifier supply voltage of +-30v DC battery to translate the symmetrical SG3525 control... Electronics Projects, 190W RMS Darlington Car Amplifier TIP142 TIP147 SG3525 Converter "audio amplifier circuits, dc dc converter circuit, sg3525 circuit, transistor amplifier, " Date 2019/08/04