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HT863
10W Class D Audio Amplifier with Limiter Function
HT863 is a mono Class D audio amplifier, which can deliver 10W power at the condition of VDD = 9.0V, THD+N=10%, 4Ω Load, 1kHz sine wave. Class AB is also available while purchasing in advance.HT863 integrates adjustable Limiter Function, which can be set by a resistor at the LIM pin to ground, so that the output music can be limited below the preset power and THD+N.  The HT863 Thermal Foldback (TFB) is designed to protect the HT863 from excessive die temperature in case of the device being operated beyond the recommended temperature or power limit, or with a weaker thermal system than recommended. The TFB works by reducing the on-die power dissipation by reducing Gain if the temperature trig point is exceeded, so that the peak audio power is significantly increased.HT863 has a filter-less modulation circuit which can directly drive speakers. HT863 can be shut down so that the power consumption can be minimized. As for protection function, over temperature protection function and low supply voltage malfunction preventing function are also prepared.


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FEATURES
  • Adjustable Limiter Function by outside resistor
  • A desirable THD+N can be set
  • Integrated Thermal Foldback (TFB) Function
  • Significantly increase the peak audio power
  • THD+N: 0.03%（VDD = 9.0V, RL = 4Ω+22uH, fIN = 1kHz, Po = 2.0W）

  • Output Power (fIN = 1kHz, THD+N = 10%)

    10W (VDD=9.0V, RL=4Ω+22uH)
    5.5W (VDD=9.0V, RL=8Ω+33uH)
  • Power Supply VDD: 2.5V~10V
  • Gain: 25dB
  • Filter-less Modulation
  • Thermal/Low voltage malfunction prevention function with auto recovery
  • Pb-free Packages, SOP8L-PP
APPLICATIONS


  • LCD TV/Monitor
  • Tablet PC/Note Book


  • Bluetooth/Wi-Fi Speakers
  • Portable Speakers
  • 2.1Channel Speakers    
  • Megaphone
  • Portable Gamers           
  • MP4, GPS


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TERMINAL FUNCTION*1

HT863TerminalNo.NAMEI/ODescription
1SDIShutdown terminal, amplifier goes into shutdown mode when it is pulled low
2LIMILimiter Function Terminal
3IN-ANegative input terminal (differential-)
4IN+APositive input terminal (differential+)
5OUT-ONegative output terminal (BTL-)
6VDDPowerPower supply terminal
7GNDGroundPower ground
8OUT+OPositive output terminal (BTL+)

*1      I: input   O: output  A: Analog termainal

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