TPA0233

`Ideal for Notebook Computers, PDAs, and Other Small Portable Audio Devices
`2 W Into 4- From 5-V Supply
`0.6 W Into 4- From 3-V Supply
`Stereo Head Phone Drive
`Mono (BTL) Signal Created by Summing Left and Right Signals
`Wide Power Supply Compatibility 3 V to 5 V
`3 V to 5 V
`Meets PC99 Portable Specs (target)
`Low Supply Current
   4 mA Typical at 5 V
    3.3 mA Typical at 3 V
`Shutdown Control . . . 1 A Typical
`Shutdown Pin is TTL Compatible
`40°C to 85°C Operating Temperature Range
`Space-Saving, Thermally-Enhanced MSOP Packaging

Supply voltage, V_DD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 V
Input voltage, V_I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . .0.3 V to V_DD +0.3 V
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . .internally limited (see Dissipation Rating Table)
Operating free-air temperature range, T_A (see Table 3) . . . .. . . . . . . . . . . . . . . . . . . . . . . . . .40°C to 85°C
Operating junction temperature range, T_J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40°C to 150°C
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C

The TPA0233 is a 2-W mono bridge-tied-load (BTL) amplifier designed to drive speakers with as low as 4- impedance. The mono signal is created by summing left and right inputs. The amplifier can be reconfigured on-the-fly to drive two stereo single-ended (SE) signals into head phones. This makes the device ideal for use in small notebook computers, PDAs, digital personal audio players, anyplace a mono speaker and stereo head phones are required. From a 5-V supply, the TPA0233 can delivery 2-W of power into a 4- speaker.

The gain of the input stage is set by the user-selected input resistor and a 50-k internal feedback resistor (A_V = R_F/ R_I). 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 TPA0233 amplifier is 62.5 k/ R_I in SE mode and 125 k/ R_I in BTL mode. The input terminals are high-impedance CMOS inputs, and can be used as summing nodes.

The TPA0233 is available in the 10-pin thermally-enhanced MSOP package (DGQ) and operates over an ambient temperature range of 40°C to 85°C.