5W Mono Class D Plus™ Audio Amplifier - CM8685
General Description

The CM8685 is a single channel monolithic Class D Plus Audio Amplifier IC that using Champion's unique close loop and feed forward compensation techniques to achieve better THD+N. The CM8685 integrated four power MOSFETs to drive bridge tight load output. They are guaranteed no shot through, adaptively control break before make. The CM8685 can deliver peak output power of up to 5 watts at 2£[ load from a single 5V power supply in the high fidelity range (20 Hz to 20kHz). The CM8685 incorporated a green mode function to ensure high efficiency at light load and full load. The CM8685 has the optimal high efficiency of up to 90% and no heat sink required. The efficient Class D Plus™ enables the CM8685 to operate at full power into 2£[ loads at an ambient temperature of 40 ¢J.

Low supply current of 3mA makes the device ideal for battery-powered applications.

CM8685 is packaged in a 8-pin SOP and PDIP package saves the system space.


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Features

  • Wide input range of 2V to 5.0V
  • 8 pin PSOP & PDIP package
  • Integrated power MOSFETs
  • Reduce system cost with no heat sink
  • Close Loop and Feed Forward compensation
  • Efficiency of up to 90%
  • Dramatically improves efficiency versus Class-AB
  • Excellent bass frequency without big bypass DC blocking capacitor
  • Ultra low shut down current (1uA)
  • Ultra low operation current without load (3mA)
  • Internal Thermal Protection

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Applications

  • Desktop & Laptop Computers
  • PDAs
  • Speakers (Multimedia speakers, USB speakers,..)
  • Multi-media Monitors (CRT monitors, LCD monitors,..)
  • Telephony Accessories (Feature phones, Web phones, & cell phones,..)
  • MP3 Playersu DVD Playersu TVs (HDTV, LCD TV, Plasma TV,”K)
  • Portable Radio Cassettes
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Packages
  • CM8685EP: 8-PIN PDIP (P08)
  • CM8685ES: 8-PIN PSOP (PS08)

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Datasheet PDF file

Demo Board Layout Guide PDF file

5.1 Channel Demo Board User Guide PDF file

 



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