GENERAL DESCRIPTION
A bridge-tied load (BTL) design minimizes external component count, while providing high-fidelity audio power amplification. The devices deliver 1.8W continuous average power per channel to a 4Ω load with less than 1% total harmonic distortion (plus noise), while operating from a single 2.7 to 5V supply. For reduced component designs, the devices are available with different gain levels as shown in Table 1. Table 1. Standard Products Model Gain AS1702 Adjustable (via external components) AS1703 AV = 0dB AS1704 AV = 3dB AS1705 AV = 6dB Integrated shutdown circuitry disables the bias generator and amplifiers, and reduces quiescent current consumption to less than 100nA. The shutdown input can be set active-high or active-low. All devices contain click-and-pop suppression circuitry that reduces audible clicks and pops during power-up and shutdown. The AS1702 - AS1705 are pin compatible with the LM4895 and the MAX9718A/B/C/D. The devices are available in a 10-pin MSOP package and a 10-pin DFN package.
austriamicrosystems AG
