TMPA205DS Datasheet, PDF (1/6 Pages) List of Unclassifed Manufacturers – 2.45-W/Ch STEREO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER

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 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
♦ 2.5V to 5.5V Single Supply
♦ Up to 5.3W/Ch Max. Power or 2.45W/Ch rms.
♦ Up to 92% Power Efficiency
♦ 3.5mA Quiescent Current
♦ 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
♦ Differential Signal Processing Improves CMRR &
Eliminates Power Regulation & Bypass Capacitor
♦ Package：TSSOP, PDIP, SOP Available
REFERENCE CIRCUIT（Please refer to TMPA002.APP for application）
To PS
VDD
Cs
Vi1^-
Ri1 _IN1-
-
Differential
Input
Vi1⁺
Ri1 _IN1+
+
PWM
Power
Drive
Vo1⁺
Vo1^-
VDD
1
20
Vo1-
2
19
GND
3
18
SDN1
SDN2
Control
Circuitry
SDN1
4
17
VDDA
5
16
GNDA
6
15
Vi2^-
Ri2 _IN2-
-
Differential
Input
Vi2⁺
Ri2 _IN2+
+
PWM
Power
Drive
GND
Vo2⁺
Vo2^-
IN2+
7
14
IN2-
8
13
GND
9
12
Vo2+
10
11
TMPA205DS
（Please email [e-mail] for complete datasheet.）
Vo1+
GND
IN1-
IN1+
GNDA
VDDA
SDN2
GND
Vo2-
VDD
Copyright©2003, Tai-1 Microelectronics Corp.
1
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