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Tai-1 Microelectronics
www.taimec.com.tw
TMPA205DS
December 2004
2.45-W/Ch STEREO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER GENERAL DESCRIPTION
The TMPA205DS is a stereo class-D filter-free audio power amplifier IC. It delivers up to 2.45W/Ch power into a 4 ohm load or 1.5W/Ch power into an 8 ohm load. Two patents are pending. With common mode input structure, TMPA205DS 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 PWMPulse Width Modulation. Differential Signal Processing Improves CMRR & Less Than 0.3uA Shutdown Current Popless Power-Up, Shutdown and Recovery Differential 250 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 Up to 92% Power Efficiency 3.5mA Quiescent Current
FEATURES
2.5V to 5.5V Single Supply Up to 5.3W/Ch Max. Power or 2.45W/Ch rms.
Eliminates Power Regulation & Bypass Capacitor
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.
PackageTSSOP, PDIP, SOP Available
REFERENCE CIRCUITPlease refer to TMPA002.APP for application
VDD To PS Cs Ri1 Vi1Differential Input Ri1 Vi1+ IN1+ IN1Vo1+ PWM + Power Drive Vo1-
VDD Vo1GND SDN1 VDDA GNDA IN2+
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
Vo1+ GND IN1IN1+ GNDA VDDA SDN2 GND Vo2VDD
SDN1 SDN2 Ri2 Vi2Differential Input Ri2 Vi2+ IN2+
Control Circuitry
IN2Vo2+ PWM + Power Drive Vo2GND TMPA205DS
IN2GND Vo2+
Please email david@taimec.com.tw for complete datasheet.
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TMPA205DS
December 2004
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.
ABSOLUTE MAXIMUM RATINGS
Over operating free-air temperature range unless otherwise noted(1) TMPA205DS Supply voltage, VDD Input voltage, VI Continuous total power dissipation Operating free-air temperature, TA Operating junction temperature, TJ Storage temperature, Tstg Lead temperature 1,6mm(1/16 inch)from case for 10 seconds In normal mode In shutdown mode -0.3V to 6V -0.3V to 7V -0.3V to VDD+0.3V UNIT V V V
See package dissipation ratings -40 to 85 C -40 to 150 -65 to 150 260 C C 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 Supply voltage, VDD High-level input voltage, VIH Low-level input voltage, VIL Input resistor, Ri Common Mode Input Voltage Range Operating free-air temperature, TA SDN1 , SDN2 SDN1 , SDN2 Gain 20 V/V (26dB) VDD=2.5V5.5V, CMRR -55dB 2.5 2 0 15 0 -40 VDD 85 NOM MAX 5.5 VDD 0.8 UNIT V V V k V C
PACKAGE DISSIPATION RATINGS
PACKGE TSSOP20 DERATING FACTOR 9.07mW/ C TA 25 C POWER RATING 1.1338W TA = 70 C POWER RATING 0.7256W TA = 85 C POWER RATING 0.5896W
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TMPA205DS
December 2004
ELECTRICAL CHARACTERISTICS
TA=25 (unless otherwise noted) C PARAMETER
VOS PSRR CMRR IIH IIL IQ IQ (SD) rDS(on) f(sw) Av Output offset voltage (measured differentially) Power supply rejection ratio Common mode rejection ratio High-level input current Low-level input current Quiescent current Shutdown current Static drain-source on-state resistance Switching frequency BTL Gain
TEST CONDITIONS
VI=0V,AV=2, VDD=2.5V to 5.5V VDD=2.5V to 5.5V VDD=2.5V to 5.5V, VIC=VDD/2 to 0.5V VIC=VDD/2 to VDD-0.8V VDD=5.5V, VI=5.8V ( SDN1 , SDN2 ) VDD=5.5V, VI=-0.3V ( SDN1 , SDN2 ) VDD=5.5V, no load VDD=3.6V, no load VDD=2.5V, no load V( SDN )=0.8V, VDD=2.5V to 5.5V VDD=2.5V VDD=3.6V VDD=5.5V VDD=2.5V to 5.5V VDD=2.5V to 5.5V
MIN
TYP
25 -75 -60
MAX
UNIT
mV
-55 -55 1 1
dB dB A A mA A m
4 3.5 3 0.3 790 600 510 210 135k RI 250 150k RI
4.6 4.2 3.6 0.5
290 165k RI
kHz V V
OPERATING CHARACTERISTICS
TA=25 Av=2, RL=8(unless otherwise noted) C, PARAMETER
PO Output power/Ch
TEST CONDITIONS
THD+N=10%,f=1kHz, RL=8 THD+N=10%,f=1kHz, RL=4 VDD=5V VDD=3.6V VDD=2.5V VDD=5V VDD=3.6V VDD=2.5V
MIN TYP MAX
1.5 0.8 0.36 2.45 1.31 0.58 0.65% 0.77% 0.66% 0.65% 0.75% 0.88% 83 55 27 30 20 33
UNIT
W
PO
Output power/Ch
W
VDD=5V, PO=1W, RL=8, f=20~20kHz VDD=3.6V, PO=0.6W, RL=8, f=20~20kHz THD+N Total harmonic distortion plus noise VDD=2.5V, PO=0.22W, RL=8, f=20~20kHz VDD=5V, PO=1.7W, RL=4, f=20~20kHz VDD=3.6V, PO=1W, RL=4, f=20~20kHz VDD=2.5V, PO=0.4W, RL=4, f=20~20kHz SNR Vn ZI TUP Signal-to-noise ratio Output voltage noise Input impedance Start-up time from shutdown VDD=3.6V VDD=5V, PO=1W, RL=8
dB VRMS k ms
VDD=3.6V, f=20Hz to 20kHz Inputs dc-grounded, No weighting
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www.taimec.com.tw VDD Vo1GND SDN1 VDDA GNDA IN2+ IN2GND Vo2+ 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 Vo1+ GND IN1IN1+ GNDA VDDA SDN2 GND Vo2VDD
TMPA205DS
December 2004
TERMINAL FUNCTIONS
TERMINAL I/O NAME IN1-,IN2IN1+,IN2+ VDD VDDA Vo1+,Vo2+ GND GNDA Vo1-,Vo2SDN1 , SDN2 PIN NO 18,8 17,7 1,11 5,15 20,10 3,9,13,19 6,16 2,12 4,14 I I I I O I I O I Negative differential input Positive differential input Digital Power supply Analog Power supply Positive BTL output Digital ground Analog ground Negative BTL output Shutdown terminal (active low logic) DESCRIPTION
TYPICAL CHARACTERISTICS
Note 1. No input coupling capacitors are used for all measurements. 2 Differential inputs are applied and BTL outputs are measured. 3. Balanced RC filter is used for THD+N measurement. 4. fc( -3dB frequency) of the RC filter is set 20KHz unless otherwise specified. 5. Balanced LC filter is used for power efficiency measurement where L is 33H and C is 1F.
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TMPA205DS
December 2004 (IN MILLIMETERS)
Physical Dimensions
6.5 0.1 20 -A11
6.4
4.4 0.1 -B-
3.2
PIN#1 IDENT.
1
10
0.2 C B A ALL LEAD TIPS
1.1 MAX TYP
0.1 C ALL LEAD TIPS (0.9)
-C-
0.10 0.05 TYP 0.65 TYP 0.19 - 0.30 TYP 0.13
M
AB
S
C
S
7.72 TYP 4.16 TYP
(1.78 TYP)
0.42 TYP 0.65 TYP
LAND PATTERN
TSSOP20
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Tai-1 Microelectronics
www.taimec.com.tw
TMPA205DS
December 2004
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 (c)2003,Tai-1 Microelectronics Corp.
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