'Headphone' related articles 1

  1. 2009/05/28 TPA6141A2 - CLASS-G DIRECTPATH™ STEREO HEADPHONE AMPLIFIER
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 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 mW per channel into 32 Ω. Shutdown mode reduces the supply current to less than 3 mA 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.
The TPA6141A2 (TPA6141) is available in a 0,4 mm pitch, 16-bump 1,6 mm × 1,6 mm WCSP (YFF) package.

FEATURES
*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
*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 WCSP Package

APPLICATIONS
*Cellular Phones / Music Phones
*Portable Media / MP3 Players
*Portable CD / DVD Players

TPA6141A2YFFR, TPA6141A2YFFT

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