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 2.5V to 5.5V supply voltage. Class-G operation keeps total supply current below 5.0mA while delivering 500µW per channel into 32. Shutdown mode reduces the supply current to less than 3µA 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 ±8kV 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
  • 0.6mA / 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 0V
  • 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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