Dallas, Tex. Texas Instruments Inc. (TI) has introduced its second-generation, 15-W, stereo analog-input Class-D amplifiers with single-ended outputs. These highly-efficient devices eliminate components to reduce total solution size and cost in HDTVs and other consumer audio electronics. The TPA3121D2 and TPA3124D2 devices address single-ended design challenges to ensure robust and reliable audio performance in LCD, plasma and DLP TVs and other home audio products.
The single-ended architectures of the TPA3121D2 and TPA3124D2 amps reduce bill of material (BOM) costs and save board area by eliminating two LC output filters. In addition, both devices can run off the existing +24-V backlight rail in a LCD HDTV, eliminating the need for a dedicated power rail. With greater than 90 percent efficient operation, the amplifiers also eliminate the need for a heat sink.
The TPA3121D2 and TPA3124D2 devices leverage TI's field-proven technology to solve the click and pop challenges typically associated with single-ended solutions. Along with single-ended stereo support, the TPA3121D2 and TPA3124D2's outputs can be configured in BTL mode to support 30-W mono applications such as wireless speakers or subwoofers. In addition, the TPA3124D2 features a fast mute time of 30 us. Depending on the video processor, a faster mute may be necessary to reduce power-loss pop. To ensure reliability, both devices are fully protected with integrated self-protection circuits against faults including over-voltage, under-voltage, over-temperature and short circuit.
Pricing: All in quantities of 1,000.
- TPA3122D2 (15W stereo power, 30W mono power, 10-30-V power supply, without fast mute support, 20-DIP package.): $0.99
- (15W stereo power, 30W mono power, 10-26-V power supply, without fast mute support, 24-TSSOP): $1.45
- (15W stereo power, 30W mono power, 10-26-V power supply, with fast mute support, 24-TSSOP): $1.45
- (15W stereo power, 30W mono power, 10-30-V power supply, without fast mute support, 24-TSSOP): $1.75
Texas Instruments , 1-800-477-8924, www.ti.com