CM8685 Datasheet, PDF (2/7 Pages) Champion Microelectronic Corp. – 5W MONO CLASS D PLUSTM AUDIO AMPLIFIER

CM8685
5W MONO CLASS D PLUS^TM AUDIO AMPLIFIER
GENERAL DESCRIPTION
FEATURES
The CM8685 is a single channel monolithic Class D Plus^TM !
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 4Ω 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^TM enables the CM8685
to operate at full power into 4Ω loads at an ambient
temperature of 40 ℃.
Wide input range of 2.0V 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
Low supply current of 3mA makes the device ideal for
battery-powered applications.
CM8685 is packaged in a 8-pin PSOP and PDIP package
saves the system space.
24 Hours Technical Support---WebSIM
Champion provides customers an online circuit simulation tool
called WebSIM. You could simply logon our website at
www.champion-micro.com for details.
APPLICATIONS
PIN CONFIGURATION
! Desktop & Laptop Computers
! PDAs
! Speakers (Multimedia speakers, USB speakers,..)
! Multi-media Monitors (CRT monitors, LCD monitors,..)
1
! Telephony Accessories (Feature phones, Web phones,
& cell phones,..)
2
! MP3 Players
3
! DVD Players
! TVs (HDTV, LCD TV, Plasma TV,…)
4
! Portable Radio Cassettes
PSOP-8 (PS08)/PDIP (P08)
Top View
VCC
VDD
8
VL1
VL2
7
AGND
PGND
6
SD
M U S IC -IN
5
2002/04/22 Rev. 6
Champion Microelectronic Corporation
Page 1