ROHM Launches Digital Input Hi-Fi Class D Headphone Amplifier LSI

(Product News, 13 Jun 2007)

ROHM has completed development of a digital input Hi-Fi class-D headphone amplifier LSI designed specifically for portable audio devices such as MP3 players, IC recorders, electronic dictionaries, digital cameras and notebook PCs. The BU7839GVW features the lowest power consumption in the industry and supports digital input without the need for a DAC by integrating a conversion circuit, resulting in longer battery life and playback time.

Power consumption is 6.5mW—85 percent less than the previous model, and mounting area is decreased by 40 percent due to the compact 4mm BGA package. A startup noise reduction circuit and muting transistor is built in, eliminating popping noises during startup.

In addition, a special circuit is integrated that suppresses clicking sounds during volume adjustment and can be set to change the gain modification method between three modes: instant, zero cross and soft switching, for improved playback fidelity.

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