Texas Instruments TPA3100D2 manual Gain Settings, 2.1.2.3Control Outputs, 2.1.3Power Up

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Operation

Table 1. Gain Settings

GAIN1 (J13) (1)	GAIN0 (J12) (1)	Amplifier Gain (dB)
ON	ON	20
ON	OFF	26
OFF	ON	32
OFF	OFF	36

(1)OFF = Jumper removed; ON = Jumper installed

2.1.2.3Control Outputs

1.FAULT: This pin is a TTL compatible output for reporting a short-circuit fault on the output. If the

outputs are shorted to GND, VCC, or to each other, this terminal goes high and remains high until one of the following operations is performed: power is cycled, SHUTDOWN is cycled, or MUTE is cycled. If jumper J11 is installed, the MUTE terminal is connected directly to the FAULT terminal and a short-circuit fault is automatically cleared when it occurs.

2.1.3Power Up

1.Verify correct voltage and input polarity and turn the external power supplies on. The EVM should begin operation.

2.Adjust the input signal.

3.Adjust the control inputs to the desired settings.

4.If no sound is audible, check the position of the MSTR/SLV (J14) jumper. It should be removed if evaluating a single EVM.

5.Adjust the amplifier gain by installing/removing the gain jumpers, J12 and J13.

4 TPA3100D2 Audio Power Amplifier Evaluation Module With LC Filter SLOU179 –December 2005