Features: ` Ideal for Notebook Computers, PDAs, and Other Small Portable Audio Devices
` 1 W Into 8- From 5-V Supply
` 0.3 W Into 8- From 3-V Supply
` Stereo Head Phone Drive
` Mono (BTL) Signal Created by Summing Left and Right Signals Internally
` Wide Power Supply Compatibility 2.5 V to 5.5 V
` Low Supply Current
3.2 mA Typical at 5 V
2.7 mA Typical at 3 V
` Shutdown Control . . . 1 A Typical
` Shutdown Pin Is TTL Compatible
` 40 to 85 Operating Temperature Range
` Space-Saving, Thermally-Enhanced MSOP PackagingPinout
SpecificationsSupply voltage, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
Input voltage range, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to VDD +0.3 V
Continuous total power dissipation . . . . internally limited (see Dissipation Rating Table)
Operating free-air temperature range, TA (see Table 3) . . . . . . . . . . . . . . . 40 to 85
Operating junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . 40 to 150
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to 150
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . 260
‡ 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.
DescriptionThe TPA0253 is a 1-W mono bridge-tied-load (BTL) amplifier designed to drive speakers with as low as 8- impedance. The mono signal is created by summing left and right inputs internally. The amplifier can be reconfigured on the fly to drive two stereo single-ended (SE) signals into headphones. This makes the device ideal for use in small notebook computers, PDAs, digital personal audio players, anyplace a mono speaker and stereo headphones are required. From a 5-V supply, the TPA0253 can deliver 1-W of power into an 8- speaker.
The gain of the input stage is set by the user-selected input resistor and a 50-k internal feedback resistor (AV = RF/RI). The power stage is internally configured with a gain of 1.25 V/V in SE mode, and 2.5 V/V in BTL mode. Thus, the overall gain of the TPA0253 amplifier is 62.5 k/RI in SE mode and 125 k/RI in BTL mode. The input terminals are high-impedance CMOS inputs, and can be used as summing nodes.
The TPA0253 is available in the 10-pin thermally-enhanced MSOP package (DGQ) and operates over an ambient temperature range of 40 to 85.
TPA0253 Data Sheet
