Texas Instruments(으)로 돌아가기

Texas Instruments TPA6138A2 / TPA6139A2 Headphone Drivers

Texas Instruments TPA6138A2 and TPA6139A2 DirectPath™ headphone drivers are designed for use in PDP / LCD TV applications as well as Blu-Ray™ and DVD players, mini / micro combo systems, and sound cards. The TI TPA6138A2 pop-free stereo headphone amplifier with adjustable gain is designed to allow the removal of the output dc-blocking capacitors for reduced component count and cost. The TPA6138A2 is capable of driving 25mW into a 32Ω load with 3.3V supply voltage. The device has differential inputs and uses external gain-setting resistors that support a gain range of ±1V/V to ±10V/V. The TI TPA6139A2 pop-free headphone driver with programmable fixed gain does not require a power supply greater than 3.3V to generate 25mW and does not require a split rail power supply. The TI TPA6139A2 allows the designer to choose from 12 internal programmable gain settings to match the line driver with the Codec output level.

View Associated Development Tools

Features

  • TPA6138A2
    • Stereo DirectPath™ headphone amplifier
      • 40mW Into 32Ω With 3.3V Supply
    • Low THD+N < 0.01% at 10mW Into 32Ω
    • High SNR, >90dB
    • Differential input and single-ended output
    • Adjustable gain by external gain-setting resistors
    • Configurable as a second-order low-pass filter
      • Ideal for PWM audio sources
    • Low DC Offset, < 1mV
    • Ground-referenced outputs eliminate DC-blocking capacitors
      • Improve THD+N performance, No degradation of low-frequency response due to output capacitors
    • Short-circuit protection
    • Click- and pop-reduction circuitry
    • External undervoltage mute
    • Active mute control for pop-free audio On/Off control
  • TPA6139A2 
    • DirectPath™
      • Eliminates pop/clicks, eliminates output DC-blocking capacitors, 3V to 3.6V supply voltage
    • Low noise and THD
      • SNR > 105dB at –1x gain, typical Vn < 15µVms 20-20kHz at –1x Gain, THD+N < 0.003% at 10kΩ load and –1x gain
    • 25mW into 600Ω Load
    • 2Vrms output voltage into 5kΩ load
    • Single-ended input and output
    • Programmable gain select reduces component count
      • 13x gain values
    • Active mute with more than 80dB attenuation
    • Short circuit and thermal protection
    • ±8kV HBM ESD protected outputs

Applications

  • LCD and PDP TV
  • Blu-ray Disc™, DVD players
  • Set-top boxes
  • Mini/Micro combo systems
  • Sound cards
  • Laptops
게시일: 2011-02-28 | 갱신일: 2022-03-11