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.