TMPA2055DM

TMPA2055DM ETC | Alldatasheet

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Technical content

Tai-1 Microelectronics TMPA2055DM www.taimec.com.tw May 5, 2005 Copyright ©2004, Tai-1 Microelectronics Corp. 1 2.7-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER GENERAL DESCRIPTION The TMPA2055DM is a mono class-D filter –free audio power amplifier IC. It delivers up to 2.7W power into a 3 ohms load or 2.3W power into a 4 ohm load or 1.5W power into an 8 ohm load. Two patents are pending. With common mode input structure, TMPA2055DM requires no input or output coupling capacitors. It also features high Common Mode Rejection Ratio and Power Supply Rejection Ratio. 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 PWM（Pulse Width Modulation）.

APPLICATIONS

Multimedia application includes Cellular Phones, PDAs, 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.

FEATURES

♦ 4.5V to 5.5V Single Supply ♦ Up to 2.7W at 5V, 3 ohms ♦ Up to 85% Power Efficiency ♦ 2.2mA Quiescent Current at 5V ♦ Less Than 0.2uA Shutdown Current ♦ Popless Power-Up, Shutdown and Recovery ♦ Differential 230 KHz PWM Allows Bridge-Tied Load to 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 ♦ Short-Circuit Protection ♦ Differential Signal Processing Improves CMRR ♦ Package：TSSOP8, SOP8, MSOP8 Available For best performance, please refer to http://www.taimec.com.tw/data/Tmpa2055EVM/tmpa2055 dmEVM.pdf for PCB layout. REFERENCE CIRCUIT PDF created with pdfFactory trial version www.pdffactory.com

Tai-1 Microelectronics TMPA2055DM www.taimec.com.tw May 5, 2005 Copyright ©2004, Tai-1 Microelectronics Corp. 2 （Please email david@taimec.com.tw 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) In normal mode -0.3V to 6V V Supply voltage, VDD In shutdown mode -0.3V to 7V V Input voltage, VI -0.3V to VDD+0.3V V Continuous total power dissipation See package dissipation ratings Operating free-air temperature, TA -20 to 85 。C Operating junction temperature, TJ -20 to 150 。C Storage temperature, Tstg -40 to 150 。C Lead temperature 1,6mm(1/16 inch)from case for 10 seconds 260 。C (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 NOM MAX UNIT Supply voltage, VDD 4.5 5.5 V High-level input voltage, VIH SDN 2 VDD V Low-level input voltage, VIL SDN 0 0.8 V Input resistor, Ri Gain ≤ 20 V/V (26dB) 0 kΩ Common Mode Input Voltage Range V DD=VDDA=4.5V〜5.5V, CMRR ≤ -55dB 0 VDD V Operating free-air temperature, TA -20 85 。C PACKAGE DISSIPATION RATINGS PACKGE DERATING FACTOR TA ≤ 25。C POWER RATING TA = 70。C POWER RATING TA = 85。C POWER RATING SOP8 6.39mW/。C 0.799W 0.511W 0.415W PDF created with pdfFactory trial version www.pdffactory.com

Tai-1 Microelectronics TMPA2055DM www.taimec.com.tw May 5, 2005 Copyright ©2004, Tai-1 Microelectronics Corp. 3

ELECTRICAL CHARACTERISTICS

TA=25。C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT │VOS│ Output offset voltage (measured differentially) VI=0V,AV=2, VDD=VDDA=4.5V to 5.5V 25 mV PSRR Power supply rejection ratio VDD=VDDA=4.5V to 5.5V -75 -55 dB CMRR Common mode rejection ratio VDD=VDDA=4.5V to 5.5V, VIC=1Vpp, RL=8Ω -55 -50 dB │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 VDD=VDDA=5V, no load 2 3 mA IQ (SD) Shutdown current V( SDN )=0.8V, VDD=VDDA=4.5V to 5.5V 0.2 0.5 μA rDS(on) Static drain-source on-state resistance VDD=VDDA=4.5V 790 mΩ f(sw) Switching frequency VDD=VDDA=4.5V to 5.5V 200 230 260 kHz Av BTL Gain VDD=VDDA=4.5V to 5.5V 135kΩ RI+15kΩ 150kΩ RI+15kΩ 165kΩ RI+15kΩ V V Resistance from shutdown to GND 380 kΩ OPERATING CHARACTERISTICS TA=25。C, Av=2, RL=8Ω speaker (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT PO Output power THD+N=10%,f=1kHz, RL=8Ω VDD=VDDA=5V 1.5 W PO Output power THD+N=10%,f=1kHz, RL=4Ω VDD=VDDA=5V 2.3 W PO Output power THD+N=10%,f=1kHz, RL=3Ω 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 THD+N Total harmonic distortion plus noise VDD=VDDA=5V, PO=1.5W, RL=3Ω, f=1kHz 0.64 SNR Signal-to-noise ratio VDD=VDDA=5V, PO=1W, RL=8Ω 84 dB ZI Input impedance 13.5 15 16.5 kΩ TOP VIEW PDF created with pdfFactory trial version www.pdffactory.com

Tai-1 Microelectronics TMPA2055DM www.taimec.com.tw May 5, 2005 Copyright ©2004, Tai-1 Microelectronics Corp. 4 TERMINAL FUNCTIONS TERMINAL NAME PIN NO I/O DESCRIPTION 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. PDF created with pdfFactory trial version www.pdffactory.com

Tai-1 Microelectronics TMPA2055DM www.taimec.com.tw May 5, 2005 Copyright ©2004, Tai-1 Microelectronics Corp. 5

APPLICATION INFORMATION

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Tai-1 Microelectronics TMPA2055DM www.taimec.com.tw May 5, 2005 Copyright ©2004, Tai-1 Microelectronics Corp. 6 PDF created with pdfFactory trial version www.pdffactory.com

Tai-1 Microelectronics TMPA2055DM www.taimec.com.tw May 5, 2005 Copyright ©2004, Tai-1 Microelectronics Corp. 7 Note：Please refer to document 010 APP for more application examples. PDF created with pdfFactory trial version www.pdffactory.com

Tai-1 Microelectronics TMPA2055DM www.taimec.com.tw May 5, 2005 Copyright ©2004, Tai-1 Microelectronics Corp. 9 Physical Dimensions ( IN MILLIMETERS) 8 5 1 4 E H 0.016TYP. 0.05TYP. 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 PDF created with pdfFactory trial version www.pdffactory.com

Tai-1 Microelectronics TMPA2055DM www.taimec.com.tw May 5, 2005 Copyright ©2004, Tai-1 Microelectronics Corp. 10 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 6.40 BSC E1 4.30 4.40 4.50 TSSOP8 PDF created with pdfFactory trial version www.pdffactory.com

Tai-1 Microelectronics TMPA2055DM www.taimec.com.tw May 5, 2005 Copyright ©2004, Tai-1 Microelectronics Corp. 11 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. PDF created with pdfFactory trial version www.pdffactory.com