Oki Electric Industry Co Ltd has launched the ML2650, a headphone amplifier LSI.
The chip enables battery-powered mobile phones to play back music with low-power consumption, which is achieved by a highly efficient D-class amplifier equipped with a 64KB SRAM that temporarily saves music data. In addition, the chip comes in an ultra small package size of 2.54mm x 2.7mm.
Portable music players and mobile phones with music playback function are becoming complex, requiring CPUs to offer higher performance. However, when using such high-performance CPUs, a complex software process is necessary to reduce power consumption. Therefore, developers have been looking for an easier way to achieve low power consumption in such devices. One way to control power consumption is by pacing operation of the CPU, which is a method to forward music data processed on the CPU to RAM within the device, and put the CPU to rest or standby.
According to Hiroshi Enomoto, President of Silicon Solutions Company at OKI, the ML2650 includes a D-class headphone amplifier to connect with the external CPU, a 64KB SRAM, and a 16-bit stereo DA converter all on a single chip, which will help to reduce load from the CPU.
Volume shipment of the ML2650 will start from October 2008.
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