CHAMP CM8685ES 5w mono class d plustm audio amplifier Datasheet

TM
5W MONO CLASS D PLUS
GENERAL DESCRIPTION
CM8685
AUDIO AMPLIFIER
FEATURES
The CM8685 is a single channel monolithic Class D Plus
TM
!
Wide input range of 2.0V to 5.0V
Audio Amplifier IC that using Champion’s unique close loop
!
8 pin PSOP & PDIP package
and feed forward compensation techniques to achieve
!
Integrated power MOSFETs
better THD+N. The CM8685 integrated four power
!
Reduce system cost with no heat sink
MOSFETs to drive bridge tight load output. They are
!
Close Loop and Feed Forward compensation
guaranteed no shot through, adaptively control break
!
Efficiency of up to 90%
before make. The CM8685 can deliver peak output power
!
Dramatically improves efficiency versus Class-AB
of up to 5 watts at 4Ω load from a single 5V power supply
!
Excellent bass frequency without big bypass DC blocking
in the high fidelity range (20 Hz to 20kHz). The CM8685
capacitor
incorporated a green mode function to ensure high
!
Ultra low shut down current (1uA)
efficiency at light load and full load. The CM8685 has the
!
Ultra low operation current without load (3mA)
optimal high efficiency of up to 90% and no heat sink
!
Internal Thermal Protection
TM
required. The efficient Class D Plus
enables the CM8685
to operate at full power into 4Ω loads at an ambient
temperature of 40 ℃.
Low supply current of 3mA makes the device ideal for
24 Hours Technical Support---WebSIM
battery-powered applications.
Champion provides customers an online circuit simulation tool
called WebSIM. You could simply logon our website at
CM8685 is packaged in a 8-pin PSOP and PDIP package
www.champion-micro.com for details.
saves the system space.
APPLICATIONS
PIN CONFIGURATION
PSOP-8 (PS08)/PDIP (P08)
Top View
!
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 Players
!
DVD Players
!
TVs (HDTV, LCD TV, Plasma TV,…)
!
Portable Radio Cassettes
2002/04/22 Rev. 6
1
VCC
VDD
8
2
VL1
VL2
7
3
AG ND
PG ND
6
4
SD
M USIC-IN
5
Champion Microelectronic Corporation
Page 1
TM
5W MONO CLASS D PLUS
CM8685
AUDIO AMPLIFIER
PIN DESCRIPTION
Pin No.
1
Symbol
VCC
2,7
Description
Voltage supply for internal circuits
VL1, VL2
Output / Inductor connection (IDD1, IDD2)
3
AGND
Analog ground
4
SD
Shutdown active HIGH. CMOS input level
5
MUSIC-IN
Audio input
6
PGND
Power ground for output power switcher
8
VDD
Power supply for output power switcher
BLOCK DIAGRAM
ORDERING INFORMATION
Part Number
Temperature Range
Package
CM8685EP
-20℃ to 70℃
8-Pin PDIP (P08)
CM8685ES
-20℃ to 70℃
8-Pin PSOP (PS08)
2002/04/22 Rev. 6
Champion Microelectronic Corporation
Page 2
TM
5W MONO CLASS D PLUS
CM8685
AUDIO AMPLIFIER
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are those values beyond which the device could be permanently damaged.
Supply Voltage
-0.3 to 5.5V
Input Voltage
-0.3V to VCC+0.3V
Power Dissipation (Note 1)
Internally Limited
ESD Susceptibility (Note 2)
2KV
Junction Temperature (Note 3)
150 ℃
Storage Temperature
-65℃≦TA≦150℃
Lead Temperature
(soldering 10 sec)
260℃
RECOMMENDED OPERATING CONDITIONS
MIN
Operating Free-air Temperature, TA
TYP
MAX
-20
Supply Voltage, VCC, VDD
3
High-level Input Voltage, VIH
SD
Low-level Input Voltage, VIL
SD
ELECTRICAL CHARACTERISTICS
4.5
70
UNIT
℃
5.5
V
2
V
0.8
V
(Unless otherwise stated, these specifications apply TA=25°C;
Vcc=+5V and VDD=+5V) maximum ratings are stress ratings only and functional device operation is not implied.
Symbol
Parameter
Test Conditions
CM8685
Min.
Unit
Typ.
Max.
VSD=5V
1
5
μA
Without load
3
10
mA
600
690
KHz
50
mV
REFERENCE SECTION
ISD
Supply Current, Shutdown Mode
IDD
Supply Current
f
VOS
Switching Frequency
510
Output Offset Voltage Between VL1
and VL2 with 8 ohm Load
PSRR
Power Supply Rejection Ratio
THD+N
Total Harmonic Distortion plus Noise Po=1W, 4 ohm load, f=1kHz ,
Rds(ON)
D
Drain to Source on-State Resistance
VCC=VDD=3.3V to 5.5V
IDD=0.5A, VDD=5V
Duty Cycle
55
dB
<0.6
%
200
5
220
mΩ
%
Note 1: For operating at case temperatures above 25℃, the device must be derated based on a 150℃ maximum junction
temperature and a thermal resistance of θJA=80℃/W (junction to ambient).
Note 2: Human body model, 100pF discharged through a 1.5KΩ resistor.
Note 3: The operating junction temperature maximum is 150℃.
2002/04/22 Rev. 6
Champion Microelectronic Corporation
Page 3
TM
5W MONO CLASS D PLUS
CM8685
AUDIO AMPLIFIER
APPLICATION CIRCUIT
Typical Application Circuits
2002/04/22 Rev. 6
Champion Microelectronic Corporation
Page 4
TM
5W MONO CLASS D PLUS
CM8685
AUDIO AMPLIFIER
PACKAGE DIMENSION
8-PIN PDIP (P08)
PIN 1 ID
θ
θ
8-PIN PSOP (PS08)
θ
θ
2002/04/22 Rev. 6
Champion Microelectronic Corporation
Page 5
CERAMIC/SURGE
ABSORBER
SHANGHAI,CHINA
DIODES LAB
HANGZHOU,CHINA
CERAMIC/PZT
SHINCHU,TAIWAN
DC POWER LAB
TAIPEI,TAIWAN
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