Texas Instruments TPA6139A2 EVM - Manual (Page 2)

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Figure 2. TPA6139A2 EVM Bottom View
1 Description
The TPA6139A2 is a DirectPath™ stereo headphone amplifier capable of driving 2 Vrms into a 600 Ω load
and deliver up to 25 mW/Ch into 32 Ω with a 3.3V supply. The TPA6139A2 is designed using TI’s
patented DirectPath™ technology and requires no output DC blocking capacitors.
The TPA6139A2 EVM is a complete, stand-alone audio board. It contains the TPA6139A2 TSSOP (PW)
DirectPath™ stereo headphone amplifier. All components are Pb-free.
2 EVM Specifications
Table 1. EVM Specifications
Supply voltage range, V
DD
3.0 V to 3.6 V
Supply current, I
DD
130 m A, Typical
Continuous output power, P
O
, V
DD
= 3.3 V, 32 Ω , THD+N < 0.03% 25 m W
3 Operation
This section describes how to operate the TPA6139A2EVM.
3.1 Quick-Start List for Stand-Alone Operation
Use the following steps when operating the TPA6139A2EVM stand alone or when connecting the EVM
into an existing circuit.
3.1.1 Power and Ground
1. Verify that the external power sources are set to OFF.
2. Connect the power supply to the EVM (J1) and set the power supply voltage between 3.0 V and 3.6 V
3.1.2 Inputs and Outputs
3.1.2.1 Audio
1. Verify that the audio source is set to the minimum level.
2. Connect the audio source to the inputs, LIN and RIN.
3. Connect a headset or other load to the headphone jack HPOUT.
2 TPA6139A2 EVM SLOU308 – January 2011
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