TMPA2055DM Tai-1 Microelectronics www.taimec.com.tw May 5, 2005 2.7-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER GENERAL DESCRIPTION FEATURES The TMPA2055DM is a mono class-D filter–free audio power ♦ 4.5V to 5.5V Single Supply amplifier IC. It delivers up to 2.7W power into a 3 ohms load or ♦ Up to 2.7W at 5V, 3 ohms 2.3W power into a 4 ohm load or 1.5W power into an 8 ohm load. ♦ Up to 85% Power Efficiency Two patents are pending. ♦ 2.2mA Quiescent Current at 5V With common mode input structure, TMPA2055DM requires no input or output coupling capacitors. It also features high ♦ Less Than 0.2uA Shutdown Current Common Mode Rejection Ratio and Power Supply Rejection ♦ Popless Power-Up, Shutdown and Recovery Ratio. ♦ Differential 230 KHz PWM Allows Bridge-Tied Load to For multiple-input applications, independent gain control and corner frequency can be implemented by summing the input sources through resistor ratio and input capacitor values. Analog input signal is converted into digital output which drives directly to the speaker. High power efficiency is achieved due to digital output at the load. The audio information is embedded in Doubles Output Power and Eliminates LC Output Filter ♦ Common Mode Structure Requires No Input Capacitors ♦ BTL Output Requires No Output Capacitors ♦ Thermal Shutoff and Automatic Recovery PWM（Pulse Width Modulation）. ♦ Short-Circuit Protection ♦ Differential Signal Processing Improves CMRR APPLICATIONS Multimedia application includes Cellular Phones, PDAs, ♦ Package：TSSOP8, SOP8, MSOP8 Available DVD/CD players, TFT LCD TVs/Monitors, 2.1 channel/5.1 channel audio systems, USB audio. It is also ideal for other portable devices like Wireless Radios. For best performance, please refer to http://www.taimec.com.tw/data/Tmpa2055EVM/tmpa2055 dmEVM.pdf for PCB layout. REFERENCE CIRCUIT Copyright ©2004, Tai-1 Microelectronics Corp. PDF created with pdfFactory trial version www.pdffactory.com 1 TMPA2055DM Tai-1 Microelectronics www.taimec.com.tw May 5, 2005 （Please email [email protected] for complete datasheet.） Tai-1 Microelectronics reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers are responsible for their products and applications using Tai-1 Microelectronics components. Note that the external components or PCB layout should be designed not to generate abnormal voltages to the chip to prevent from latch up which may cause damage to the device. ABSOLUTE MAXIMUM RATINGS Over operating free-air temperature range unless otherwise noted(1) Supply voltage, VDD In normal mode -0.3V to 6V V In shutdown mode -0.3V to 7V V -0.3V to VDD+0.3V V Input voltage, V I Continuous total power dissipation See package dissipation ratings 。C -20 to 85 Operating free-air temperature, TA Operating junction temperature, TJ -20 to 150 Storage temperature, Tstg -40 to 150 。C 。C 260 。C Lead temperature 1,6mm(1/16 inch)from case for 10 seconds (1) Stresses beyond those listed under”absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions “is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITONS MIN Supply voltage, VDD NOM MAX UNIT 4.5 5.5 V High-level input voltage, V IH SDN 2 VDD V Low-level input voltage, VIL SDN 0 0.8 V Input resistor, Ri Gain ≤ 20 V/V (26dB) 0 Common Mode Input Voltage Range VDD=VDDA=4.5V〜5.5V, CMRR ≤ -55dB 0 VDD V -20 85 。C Operating free-air temperature, TA kΩ PACKAGE DISSIPATION RATINGS PACKGE SOP8 DERATING TA ≤ 25。C TA = 70。C TA = 85。C FACTOR POWER RATING POWER RATING POWER RATING 6.39mW/。C 0.799W 0.511W 0.415W Copyright ©2004, Tai-1 Microelectronics Corp. PDF created with pdfFactory trial version www.pdffactory.com 2 TMPA2055DM Tai-1 Microelectronics www.taimec.com.tw May 5, 2005 ELECTRICAL CHARACTERISTICS TA=25。C (unless otherwise noted) PARAMETER │VOS│ PSRR Output offset voltage TEST CONDITIONS (measured differentially) Power supply rejection ratio MIN TYP MAX UNIT VI=0V,AV=2, VDD=VDDA=4.5V to 5.5V 25 VDD=VDDA=4.5V to 5.5V -75 -55 dB -55 -50 dB VDD=VDDA=4.5V to 5.5V, mV CMRR Common mode rejection ratio │IIH│ High-level input current VDD=VDDA=5.5V, VI=5.8V ( SDN ) 20 μA │IIL│ Low-level input current VDD=VDDA=5.5V, VI=-0.3V ( SDN ) 1 μA IQ Quiescent current 2 3 mA 0.2 0.5 μA VIC=1Vpp, RL=8Ω VDD=VDDA=5V, no load V( SDN )=0.8V, IQ (SD) Shutdown current rDS(on) Static drain-source on-state resistance VDD=VDDA=4.5V f(sw) Switching frequency VDD=VDDA=4.5V to 5.5V Av BTL Gain VDD=VDDA=4.5V to 5.5V VDD=VDDA=4.5V to 5.5V 790 200 135kΩ RI+15kΩ mΩ 230 150kΩ RI+15kΩ 260 165kΩ RI+15kΩ 380 Resistance from shutdown to GND kHz V V kΩ OPERATING CHARACTERISTICS TA=25。C, Av=2, RL=8Ω speaker (unless otherwise noted) PARAMETER PO Output power PO Output power PO Output power THD+N Total harmonic distortion plus noise SNR Signal-to-noise ratio ZI Input impedance TEST CONDITIONS THD+N=10%,f=1kHz, RL=8Ω THD+N=10%,f=1kHz, RL=4Ω THD+N=10%,f=1kHz, RL=3Ω MIN TYP MAX UNIT VDD=VDDA=5V 1.5 W VDD=VDDA=5V 2.3 W VDD=VDDA=5V 2.7 W VDD=VDDA=5V, PO=0.85W, RL=8Ω, f=1kHz 0.55 VDD=VDDA=5V, PO=1.3W, RL=4Ω, f=1kHz 0.55 VDD=VDDA=5V, PO=1.5W, RL=3Ω, f=1kHz 0.64 VDD=VDDA=5V, PO=1W, RL=8Ω % dB 84 13.5 15 16.5 kΩ TOP VIEW Copyright ©2004, Tai-1 Microelectronics Corp. PDF created with pdfFactory trial version www.pdffactory.com 3 TMPA2055DM Tai-1 Microelectronics www.taimec.com.tw May 5, 2005 TERMINAL FUNCTIONS TERMINAL I/O NAME DESCRIPTION PIN NO IN- 4 I Negative differential input IN+ 3 I Positive differential input VDD 6 I Digital Power supply VO+ 5 O Positive BTL output GND 7 I Digital ground VO- 8 O Negative BTL output SDN 1 I Shutdown terminal (active low logic) VDDA 2 I Analog Power supply TYPICAL CHARACTERISTICS Note 1. Input coupling 1µF capacitors are used for all measurements. 2. Differential inputs are applied and BTL outputs are measured. 3. Balanced LC filter is used for THD+N measurement and power efficiency measurement. 4. Characteristic frequency of the LC filter is set 41KHz unless otherwise specified. Copyright ©2004, Tai-1 Microelectronics Corp. PDF created with pdfFactory trial version www.pdffactory.com 4 Tai-1 Microelectronics www.taimec.com.tw TMPA2055DM May 5, 2005 APPLICATION INFORMATION Copyright ©2004, Tai-1 Microelectronics Corp. PDF created with pdfFactory trial version www.pdffactory.com 5 Tai-1 Microelectronics www.taimec.com.tw Copyright ©2004, Tai-1 Microelectronics Corp. PDF created with pdfFactory trial version www.pdffactory.com TMPA2055DM May 5, 2005 6 Tai-1 Microelectronics TMPA2055DM www.taimec.com.tw May 5, 2005 Note：Please refer to document 010 APP for more application examples. Copyright ©2004, Tai-1 Microelectronics Corp. PDF created with pdfFactory trial version www.pdffactory.com 7 TMPA2055DM Tai-1 Microelectronics www.taimec.com.tw May 5, 2005 Figure 5 ~7 show typical ferrite bead and LC output filters. 15μH Vo+ 0.22μ F 15μH 1μ F Vo0.22μ F Figure 5. Typical LC Output Filter, Cutoff Frequency of 41 kHz, Speaker Impedance=4Ω 33μH Vo+ 0.47μ F 0.1μ F 33μH Vo0.1μ F Figure 6. Typical LC Output Filter, Cutoff Frequency of 41 kHz, Speaker Impedance=8Ω Ferrite Chip Bead Vo+ Ferrite Chip Bead 100pF Vo100pF Figure 7. Typical Ferrite Chip Bead Filter （Chip bead example：遠越科技 KML2012Q102N 1kohms@100MHz, DCR=0.2ohms, I=1A） l Input Resistors and Gain The BTL gain of the amplifier is determined by Gain= 150kohms where Ri is the source impedance of the input signal. Ri+15kohms Copyright ©2004, Tai-1 Microelectronics Corp. PDF created with pdfFactory trial version www.pdffactory.com 8 TMPA2055DM Tai-1 Microelectronics www.taimec.com.tw May 5, 2005 Physical Dimensions ( IN MILLIMETERS) E 1 H 5 8 4 0.05TYP. 0.016TYP. 0.063 0.120 SYMBOLS MIN. MAX. A 0.053 0.069 A1 0.004 0.010 D 0.189 0.196 E 0.150 0.157 H 0.228 0.244 SOP8 Copyright ©2004, Tai-1 Microelectronics Corp. PDF created with pdfFactory trial version www.pdffactory.com 9 TMPA2055DM Tai-1 Microelectronics www.taimec.com.tw May 5, 2005 Physical Dimensions ( IN MILLIMETERS) SYMBOLS MIN. NDM. MAX. A - - 1.20 A1 0.05 - 0.15 A2 0.96 1.01 1.06 D 2.90 3.00 3.10 E E1 6.40 BSC 4.30 4.40 4.50 TSSOP8 Copyright ©2004, Tai-1 Microelectronics Corp. PDF created with pdfFactory trial version www.pdffactory.com 10 Tai-1 Microelectronics www.taimec.com.tw TMPA2055DM May 5, 2005 IMPORTANT NOTICE Tai-1 Microelectronics Corp. reserves the right to make changes to its products and services and to discontinue any product or service without notice. Customers should obtain the latest relevant information for reference. Testing and quality control techniques are used to screen the parameters. Testing of all parameters of each product is not necessarily performed. Tai-1 Microelectronics Corp. assumes no liability for applications assistance or customer product design. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. Reproduction of information in data sheets or related documentation is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Tai-1 Microelectronics Corp. is not responsible or liable for such altered documentation. Resale of Tai-1 Microelectronics Corp. products or services with statements different from the parameters stated by Tai-1 Microelectronics Corp. for that product or service voids all express and any implied warranties. Tai-1 Microelectronics Corp. is not responsible or liable for any such statements. Copyright ©2004,Tai-1 Microelectronics Corp. Copyright ©2004, Tai-1 Microelectronics Corp. PDF created with pdfFactory trial version www.pdffactory.com 11