The TPA6141A2 (also known as TPA6141) is a Class-G DirectPath stereo headphone amplifier with selectable gain. Class-G technology maximizes battery life by adjusting the voltage supplies of the headphone amplifier based on the audio signal level. At low level audio signals, the internal supply voltage is reduced to minimize power dissipation. DirectPathTM technology eliminates external DC-blocking capacitors.
The device features fully differential inputs with an integrated low pass filter to reduce system noise pickup between the audio source and the headphone amplifier and to reduce DAC out-of-band noise. The high power supply noise rejection performance and differential architecture provides increased RF noise immunity. For single-ended input signals, connect INL+ and INR+ to ground.
The device operates from a 2.5 V to 5.5 V supply voltage. Class-G operation keeps total supply current below 5.0 mA while delivering 500 µW per channel into 32 . Shutdown mode reduces the supply current to less than 3 µA and is activated through the EN pin.
The device has built-in pop suppression circuitry to completely eliminate disturbing pop noise during turn-on and turn-off. The amplifier outputs have short-circuit and thermal-overload protection along with ±8 kV HBM ESD protection, simplifying end equipment compliance to the IEC 61000-4-2 ESD standard.
TI Class-G Technology Significantly Prolongs Battery Life and Music Playback Time
0.6 mA / Ch Quiescent Current
50% to 80% Lower Quiescent Current Than Ground-Referenced Class-AB Headphone Amplifiers
DirectPathTM Technology Eliminates Large Output DC-Blocking Capacitors
Outputs Biased at 0 V
Improves Low Frequency Audio Fidelity
Active Click and Pop Suppression
Fully Differential Inputs Reduce System Noise
Also Configurable as Single-Ended Inputs
SGND Pin Eliminates Ground Loop Noise
Wide Power Supply Range: 2.5 V to 5.5 V
100 dB Power Supply Noise Rejection
Built-in Input Low Pass Filter
Gain Settings: 0 dB and 6dB
Short-Circuit Current Limiter
Thermal-Overload Protection
±8 kV HBM ESD Protected Outputs
0,4 mm Pitch, 1,6 mm × 1,6 mm 16-Bump WCSP (YFF) Package
APPLICATIONS
Cellular Phones / Music Phones
Smart Phones
Portable Media / MP3 Players
Portable CD / DVD Players
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