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