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HT4832
33mW CAP FREE STEREO HEADPHONE AMPLIFIER
HT4832 / HT4831 is a stereo headphone amplifier that eliminates the need for external dc-blocking output capacitors.HT4832 / HT4831 features stereo inputs that can be set in either differential or single-ended input. 4 different gain with different built-in resistors reducing external component is selectable.HT4832 / HT4831 drives 33mW into 32ohm speakers/headphone from a 3.6V supply. THD+N is 0.014% low.HT4832 / HT4831 operates from a single 2.5V to 5.5V supply with 3.6mA of typical supply current. Shutdown mode reduces supply current to less than 1μA.Thermal-overload protection, low voltage malfunction prevention function is integrated in HT4832 / HT4831.


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Features

  • No Need for DC-Blocking Capacitors

    - Outputs Biased at 0V
    - Excellent Low Frequency Fidelity

  • 3.6mA Typical Supply Current
  • Low Standby Current: 0.1μA

  • Differential or Single-Ended Inputs

    - Built-In Resistors Reduces Component Count

  • - Improves System Noise Performance

  • Low THD+N: 0.014% (3.6V, 32ohm, 20mW)

  • Output Power: 33mW (PVDD=3.6V, RL=32Ω, THD+N=1%)

  • Power Supply: 2.5V-5.5V
  • Gain Setting: -6/0/3/6 dB
  • Thermal-Overload and Low Voltage Malfunction Prevention Function

  • Pb-Free, Small Package available
    -QFN16（3m*3m）


Application
  • Bluetooth headset          
  • Smart phone
  • Portable speaker    
  • Tablet/Notebook
  • CD/MP3             
  • Portable Gaming


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TERMINAL CONFIGURATION

Pin No.Pin NameI/OPin Description
HT4832HT4831
11INL-IInverting left input for differential signals; left input for single-ended signals
22INL+INon-inverting left input for differential signals. Connect to ground for single-ended input applications
33INR+INon-inverting right input for differential signals. Connect to ground for single-ended input applications
44INR-IInverting right input for differential signals; right input for single-ended signals
57OUTRORight headphone amplifier output. Connect to right terminal of headphone jack
65G0IGain select
76G1IGain select
88HPVSSPCharge pump output and negative power supply for output amplifiers; connect 2.2µF capacitor to GND
910CAP-PCharge pump negative flying cap. Connect to negative side of 2.2µF capacitor between CP+ and CP-
109PGNDPGround
1111CAP+PCharge pump positive flying cap. Connect to positive side of 2.2µF capacitor between CP+ and CP-
1213HPVDDPPositive power supply for headphone amplifiers. Connect to a 2.2µF capacitor. Do not connect to PVDD
1316ENIAmplifier enable. Connect to logic low to shutdown; connect to logic high to activate
1412PVDDPPositive power supply
1515SGNDIAmplifier reference voltage. Connect to ground terminal of headphone jack
1614OUTLOLeft headphone amplifier output. Connect to left terminal of headphone jack
I: Input Terminal   O: Output Terminal   P: Power/Ground
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