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| 5W MONO CLASS D PLUS GENERAL DESCRIPTION The CM8685 is a single channel monolithic Class D Plus 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 4 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 temperature of 40 . 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. TM TM TM CM8685 AUDIO AMPLIFIER FEATURES ! ! ! ! ! ! ! ! ! ! ! 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 Audio Amplifier IC that using Champion's unique close loop enables the CM8685 to operate at full power into 4 loads at an ambient 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 ! ! ! ! ! ! ! ! ! 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 PIN CONFIGURATION PSOP-8 (PS08)/PDIP (P08) Top View 1 2 3 4 VCC VL1 AG ND SD VDD VL2 PG ND M USIC-IN 8 7 6 5 2002/04/22 Rev. 6 Champion Microelectronic Corporation Page 1 5W MONO CLASS D PLUS PIN DESCRIPTION Pin No. 1 2,7 3 4 5 6 8 VCC VL1, VL2 AGND SD MUSIC-IN PGND VDD Symbol Voltage supply for internal circuits Output / Inductor connection (IDD1, IDD2) Analog ground Shutdown active HIGH. CMOS input level Audio input Power ground for output power switcher Power supply for output power switcher Description TM CM8685 AUDIO AMPLIFIER BLOCK DIAGRAM ORDERING INFORMATION Part Number CM8685EP CM8685ES Temperature Range -20 to 70 -20 to 70 Package 8-Pin PDIP (P08) 8-Pin PSOP (PS08) 2002/04/22 Rev. 6 Champion Microelectronic Corporation Page 2 5W MONO CLASS D PLUS ABSOLUTE MAXIMUM RATINGS TM CM8685 AUDIO AMPLIFIER Absolute Maximum ratings are those values beyond which the device could be permanently damaged. Supply Voltage Input Voltage Power Dissipation (Note 1) ESD Susceptibility (Note 2) -0.3 to 5.5V -0.3V to VCC+0.3V Internally Limited 2KV Junction Temperature (Note 3) Storage Temperature Lead Temperature (soldering 10 sec) 260 150 -65TA150 RECOMMENDED OPERATING CONDITIONS MIN Operating Free-air Temperature, TA Supply Voltage, VCC, VDD High-level Input Voltage, VIH Low-level Input Voltage, VIL SD SD -20 3 2 0.8 4.5 TYP MAX 70 5.5 UNIT V V V ELECTRICAL CHARACTERISTICS (Unless otherwise stated, these specifications apply TA=25C; Vcc=+5V and VDD=+5V) maximum ratings are stress ratings only and functional device operation is not implied. CM8685 Min. Typ. 1 3 510 600 Max. 5 10 690 50 VCC=VDD=3.3V to 5.5V IDD=0.5A, VDD=5V 5 55 <0.6 200 220 Symbol Parameter Test Conditions REFERENCE SECTION Unit ISD IDD f VOS PSRR THD+N Rds(ON) D Supply Current, Shutdown Mode Supply Current Switching Frequency Output Offset Voltage Between VL1 and VL2 with 8 ohm Load Power Supply Rejection Ratio Drain to Source on-State Resistance Duty Cycle VSD=5V Without load A mA KHz mV dB % m % Total Harmonic Distortion plus Noise Po=1W, 4 ohm load, f=1kHz , 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 JA=80/W (junction to ambient). Note 2: Human body model, 100pF discharged through a 1.5K resistor. Note 3: The operating junction temperature maximum is 150. 2002/04/22 Rev. 6 Champion Microelectronic Corporation Page 3 5W MONO CLASS D PLUS APPLICATION CIRCUIT TM CM8685 AUDIO AMPLIFIER Typical Application Circuits 2002/04/22 Rev. 6 Champion Microelectronic Corporation Page 4 5W MONO CLASS D PLUS PACKAGE DIMENSION 8-PIN PDIP (P08) TM CM8685 AUDIO AMPLIFIER PIN 1 ID 8-PIN PSOP (PS08) 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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