TPA6120 Hifi headphone amplifier. 2012-10-12

The objective was to build a hifi headphone amplifier for myself and to CAD a pcb using SMD components.

The choice for headphone driver circuit fell on the very popular circuit TPA6120 from TI. This is more or less a OP designed for Hifi. A input buffer stage is needed for the driver and for this LME49740 (also Hifi) was chosen.

The power supply is a double 12Vdc with rated current around 400mA.In the design there are some additional filters and capacitors for reducing noise.Both OP stages are configured with gain=1, for better schematics picture pls email me.

Fuel Gard. 2012-02-20

Is a extension module to be used together with any alarm system on the market that has external input possibility.