1FEATURES
2• 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

DESCRIPTION
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 Ω. 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.