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Hi-Fi headphone amp consumes very low power

Posted: 08 Aug 2007 ?? ?Print Version ?Bookmark and Share

Keywords:Hi-Fi class-D headphone amplifier LSI? low power consumption?

Rohm Co. Ltd has developed 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 is said to feature 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, about 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.

The BU7839GVW also features an integrated independent L-channel and R-channel digital volume control with three gain switching modes: instant, zero-cross and soft switch suppresses clicking noise during volume adjustment. The device's PLL is built in for master/slave compatibility.

Sampling price starts at $8.5. The device is available now.

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