|
TMPA218DS Datasheet, PDF (1/13 Pages) List of Unclassifed Manufacturers – 3.5W/CH STEREO CLASS-D AUDIO POWER AMPLIFIER | |||
|
tai'mec
Preliminary
www.taimec.com.tw / www.class-d.com.tw
TMPA218DS
Rev.1.0 December 24,
2007
3.5W/CH STEREO CLASS-D AUDIO POWER AMPLIFIER
GENERAL DESCRIPTION
FEATURES
The TMPA218DS is a stereo class-D audio power amplifier IC ⦠2.5V to 6V Single Supply
with digital volume control. With BTL (Bridge-Tied-Load) ⦠Up to 3.5W / Ch at 5.5V, 2 ohms
configuration, it delivers up to 3.5W/ch (7W in all) into a
⦠Up to 88% Power Efficiency
2 ohm load. Up and down volume control signals provide ⦠Automatic output power control (APC)
-60dB attenuation form maximum voltage gain. No external
heat-sink is required.
For multiple-input applications, independent gain control and
⦠Memory of voltage gain at shutdown
⦠0dB to -60dB attenuation from max. voltage gain
⦠2.2mA / Ch Quiescent Current at 5V
corner frequency can be implemented by summing the input ⦠Less Than 0.2uA / Ch Shutdown Current
sources through resistor ratio and input capacitor values. ⦠Pop-less Power-Up, Shutdown and Recovery
Automatic output power control makes the best use of
battery.
⦠Differential 250 KHz PWM Allows Bridge-Tied Load to
increase Output Power and Eliminates LC Output Filter
Analog input signal is converted into digital output which ⦠Thermal Shutoff and Automatic Recovery
drives directly to the speaker. High power efficiency is
achieved due to digital output at the load. The audio
information is embedded in PWMÂPulse Width ModulationÂ.
⦠Compatible with earphone application
⦠Output Pin Short-Circuit Protection (Short to Other
Outputs, Short to VCC, Short to Ground)
APPLICATIONS
⦠Differential Signal Processing Improves CMRR
Multimedia application includes Cellular Phones, PDAs,
DVD/CD players, TFT LCD TVs/Monitors, 2.1 channel audio
systems, USB audio. It is also ideal for other portable
devices like Wireless Radios.
Package
TSSOP20 Available, pb freeÂRoHSÂ
For best performance, please refer to
http://www.taimec.com.tw/English/EVM.htm
http://www.class-d.com.tw/English/EVM.htm
for PCB layout.
REFERENCE CIRCUITÂPlease refer to TMPA002.APP for applicationÂ
RIN
RIN
COM
COM
LIN
LIN
SDNB
UPB
DOWNB
MEMO
Ri
Ri
200K
200K
VCC
200K
VCC
C on tro l
C ircui try
PWM
PWM
Power
Drive
ROUTP
ROUTN
Power
Drive
LOUTP
LOUTN
TO PS
VDD
GND
TMPA218DS
Copyright©2005, Tai-1 Microelectronics Corp.
1
|
▷ |