View TMPA2055DM_247898.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Tai-1 Microelectronics
www.taimec.com.tw
TMPA2055DM
May 5, 2005
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 PWMPulse Width Modulation. Short-Circuit Protection 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 Capacitors BTL Output Requires No Output Capacitors Thermal Shutoff and Automatic Recovery Mode Structure Requires No Input Up to 85% Power Efficiency 2.2mA Quiescent Current at 5V
FEATURES
4.5V to 5.5V Single Supply Up to 2.7W at 5V, 3 ohms
APPLICATIONS
Multimedia application includes Cellular Phones, PDAs,
Differential Signal Processing Improves CMRR PackageTSSOP8, 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 (c)2004, Tai-1 Microelectronics Corp.
1
PDF created with pdfFactory trial version www.pdffactory.com
Tai-1 Microelectronics
www.taimec.com.tw
TMPA2055DM
May 5, 2005
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) 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 V V V
See package dissipation ratings -20 to 85 C -20 to 150 -40 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 4.5 NOM MAX 5.5 VDD 0.8 UNIT V V V k VDD 85 V C
SDN SDN
Gain 20 V/V (26dB) VDD=VDDA=4.5V5.5V, CMRR -55dB
2 0 0 0 -20
PACKAGE DISSIPATION RATINGS
PACKGE SOP8 DERATING FACTOR 6.39mW/ C TA 25 C POWER RATING 0.799W TA = 70 C POWER RATING 0.511W TA = 85 C POWER RATING 0.415W
Copyright (c)2004, Tai-1 Microelectronics Corp.
2
PDF created with pdfFactory trial version www.pdffactory.com
Tai-1 Microelectronics
www.taimec.com.tw
TMPA2055DM
May 5, 2005
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 Resistance from shutdown to GND
TEST CONDITIONS
VI=0V,AV=2, VDD=VDDA=4.5V to 5.5V VDD=VDDA=4.5V to 5.5V VDD=VDDA=4.5V to 5.5V, VIC=1Vpp, RL=8 VDD=VDDA=5.5V, VI=5.8V ( SDN ) VDD=VDDA=5.5V, VI=-0.3V ( SDN ) VDD=VDDA=5V, no load V( SDN )=0.8V, VDD=VDDA=4.5V to 5.5V VDD=VDDA=4.5V VDD=VDDA=4.5V to 5.5V VDD=VDDA=4.5V to 5.5V
MIN
TYP
25 -75 -55
MAX
UNIT
mV
-55 -50 20 1
dB dB A A mA A m
2 0.2 790 200 135k RI+15k 230 150k RI+15k 380
3 0.5
260 165k RI+15k
kHz V V k
OPERATING CHARACTERISTICS
TA=25 Av=2, RL=8 speaker (unless otherwise noted) C, PARAMETER
PO PO PO Output power Output power Output power RL=8 THD+N=10%,f=1kHz, RL=4 THD+N=10%,f=1kHz, RL=3
TEST CONDITIONS
THD+N=10%,f=1kHz, VDD=VDDA=5V VDD=VDDA=5V VDD=VDDA=5V
MIN TYP MAX
1.5 2.3 2.7 0.55 0.55 0.64 84 13.5 15 16.5
UNIT
W W W
VDD=VDDA=5V, PO=0.85W, RL=8, f=1kHz THD+N Total harmonic distortion plus noise VDD=VDDA=5V, PO=1.3W, RL=4, f=1kHz VDD=VDDA=5V, PO=1.5W, RL=3, f=1kHz SNR ZI Signal-to-noise ratio Input impedance VDD=VDDA=5V, PO=1W, RL=8
%
dB k
TOP VIEW
Copyright (c)2004, Tai-1 Microelectronics Corp.
3
PDF created with pdfFactory trial version www.pdffactory.com
Tai-1 Microelectronics
www.taimec.com.tw
TMPA2055DM
May 5, 2005
TERMINAL FUNCTIONS
TERMINAL I/O NAME ININ+ VDD VO+ GND VOSDN VDDA PIN NO 4 3 6 5 7 8 1 2 I I I O I O I I Negative differential input Positive differential input Digital Power supply Positive BTL output Digital ground Negative BTL output Shutdown terminal (active low logic) Analog Power supply DESCRIPTION
TYPICAL CHARACTERISTICS
Note 1. Input coupling 1F 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 (c)2004, Tai-1 Microelectronics Corp.
4
PDF created with pdfFactory trial version www.pdffactory.com
Tai-1 Microelectronics
www.taimec.com.tw
TMPA2055DM
May 5, 2005
APPLICATION INFORMATION
Copyright (c)2004, Tai-1 Microelectronics Corp.
5
PDF created with pdfFactory trial version www.pdffactory.com
Tai-1 Microelectronics
www.taimec.com.tw
TMPA2055DM
May 5, 2005
Copyright (c)2004, Tai-1 Microelectronics Corp.
6
PDF created with pdfFactory trial version www.pdffactory.com
Tai-1 Microelectronics
www.taimec.com.tw
TMPA2055DM
May 5, 2005
NotePlease refer to document 010 APP for more application examples.
Copyright (c)2004, Tai-1 Microelectronics Corp.
7
PDF created with pdfFactory trial version www.pdffactory.com
Tai-1 Microelectronics
www.taimec.com.tw
TMPA2055DM
May 5, 2005
Figure 5 ~7 show typical ferrite bead and LC output filters.
15H Vo+ 0.22 F 15H Vo0.22 F 1 F
Figure 5. Typical LC Output Filter, Cutoff Frequency of 41 kHz, Speaker Impedance=4
33H Vo+ 0.47 F 33H Vo0.1 F 0.1 F
Figure 6. Typical LC Output Filter, Cutoff Frequency of 41 kHz, Speaker Impedance=8
Ferrite Chip Bead Vo+ Ferrite Chip Bead Vo100pF 100pF
Figure 7. Typical Ferrite Chip Bead Filter Chip bead example 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 (c)2004, Tai-1 Microelectronics Corp.
8
PDF created with pdfFactory trial version www.pdffactory.com
Tai-1 Microelectronics
www.taimec.com.tw
TMPA2055DM
May 5, 2005
Physical Dimensions
( IN MILLIMETERS)
8
5
1
4 0.05TYP.
0.016TYP.
0.120
SYMBOLS A A1 D E H
MIN. 0.053 0.004 0.189 0.150 0.228
SOP8
0.063
H
E
MAX. 0.069 0.010 0.196 0.157 0.244
Copyright (c)2004, Tai-1 Microelectronics Corp.
9
PDF created with pdfFactory trial version www.pdffactory.com
Tai-1 Microelectronics
www.taimec.com.tw
TMPA2055DM
May 5, 2005
Physical Dimensions
( IN MILLIMETERS)
SYMBOLS A A1 A2 D E E1
MIN. 0.05 0.96 2.90
NDM. 1.01 3.00 6.40 BSC
MAX. 1.20 0.15 1.06 3.10
4.30
4.40
4.50
TSSOP8
Copyright (c)2004, Tai-1 Microelectronics Corp.
10
PDF created with pdfFactory trial version www.pdffactory.com
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 (c)2004,Tai-1 Microelectronics Corp.
Copyright (c)2004, Tai-1 Microelectronics Corp.
11
PDF created with pdfFactory trial version www.pdffactory.com

▲Up To Search▲

Price & Availability of TMPA2055DM

	To Download TMPA2055DM Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .