TPA6141A2 Datasheet, PDF (1/18 Pages) Texas Instruments – CLASS-G DIRECTPATH™ STEREO HEADPHONE AMPLIFIER

TPA6141A2
www.ti.com .................................................................................................................................................................................................. SLOS634 – MARCH 2009
CLASS-G DIRECTPATH™ STEREO HEADPHONE AMPLIFIER
FEATURES
1
•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
• DirectPath^TM 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
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.
DirectPath^TM 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 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.
The TPA6141A2 (TPA6141) is available in a 0,4 mm
pitch, 16-bump 1,6 mm × 1,6 mm WCSP (YFF)
package.
OUTR+
1 mF
INR+
OUTR-
CODEC
OUTL+
INR-
OUTR
TPA6141A2
INL+
OUTL
OUTL-
EN
GAIN
Vbat
2.2 mH
2.2 mF
INL-
EN
GAIN
AVDD
SW
HPVDD
CPP
SGND
AGND
HPVSS
CPN
2.2 mF
1 mF
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Class-G DirectPath, DirectPath are trademarks of Texas Instruments.
2
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
Copyright © 2009, Texas Instruments Incorporated