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Figure 2. TPA6139A2 EVM Bottom View
1Description
The TPA6139A2 is a DirectPath™ stereo headphone amplifier capable of driving 2 Vrms into a 600Ω 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,
2EVM Specifications
Table 1. EVM Specifications
Supply voltage range, VDD | 3.0 V to 3.6 V |
Supply current, IDD | 130 m A, Typical |
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Continuous output power, PO, VDD = 3.3 V, 32 Ω, THD+N < 0.03% | 25 m W |
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3Operation
This section describes how to operate the TPA6139A2EVM.
3.1Quick-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.
3.1.1Power 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
3.1.2Inputs and Outputs
3.1.2.1Audio
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 |
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