Maxim introduces an audio subsystem using D-class and H-class amplifier technology

Maxim introduces an audio subsystem using D-class and H-class amplifier technology Maxim launches the MAX97000 / MAX97001 / MAX97002 series mono audio subsystem. This series of devices integrate high-efficiency D-type mono speaker amplifier, DirectDrive IITM H stereo headphone amplifier, and a very low noise. A simulated bypass switch. Maxim's DirectDrive II technology uses a dual-mode internal charge pump, which outputs ± 0.9V voltage when the signal level is low, switching to ± 1.8V voltage output only when a larger output power is required. This innovative architecture greatly reduces power consumption and avoids no continuous problems in other H-class architectures. The MAX97000-MAX97002 provides the best efficiency (87%, typical) and sound quality, ideal for cellular phones, portable media players (PMP), and other devices that require high sound quality, large output power, and high efficiency. In addition to enhance efficiency, the DirectDrive II architecture can also generate an output of ground potential as a reference when power is powered, and the large volume separation DC capacitance is saved. At the same time, extended spectrum modulation and active radiation suppression techniques can significantly reduce the EMI of the D-class amplifier output electrode, and it is necessary to satisfy the EN 55022B standard without using an external LC filter or shield. Integrated low noise, analog DPST audio switches to the cost of using external switches, paragraph D amplifier to reduce power consumption. The MAX97000-MAX97002 has a higher RF / TDMA noise suppression and industry optimal click / sprout suppression performance, eliminating the audible noise during power-on and power-down, simplifies the design process. The subsystem also has input mixing, volume control, and flexible user-definable input architecture with preamplifier gain settings. All controls are completed through the I2C interface. When the MAX97000-MAX97002 is powered by a 3.7V power supply, it is possible to provide an output power greater than 710 mW at 87% (typical value). The MAX97000 provides 2.0mm x 2.0mm, 25 solder ball WLP packages, and solder ball spacing is 0.4mm; MAX97001 / MAX97002 provides 2.0mm x 2.5mm, 20 solder ball WLP package, and solder ball spacing is 0.5mm. All devices operate at -40 ° C to + 85 ° C extended level temperature range. The evaluation board can be provided to accelerate the design process. Technology area Heilind won the title of "2017 Huaqiang Electronic Network Quality Supplier" Tas5634300W stereo PurePath (TM) HD digital input efficient power level TAS2557 5.7W D-class audio amplifier with H-class boost and speaker detection function Ruckus NetWorks appointed Deng Weidong for the general manager of China China Site Electronic Technology Forum - Power Technology Practice Seminar held in Wuhan