Nippon Wireless has introduced the NJU7392, a push-button electronic volume controller with built-in eala Stereo Expander function. This product is best suited for portable audio with narrow speaker spacing and is sampling.
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[development background]
In recent years, portable audio has become popular, and more and more people use portable speakers to enjoy music at home. However, portable speakers have a problem to be solved.
・The first one is a push-button portable speaker that generally needs to be equipped with a microprocessor and a button interface IC, but the cost of the parts and the design man-hours are heavy.
・The second is to pursue miniaturization, save space and consider style problems, which will result in narrow speaker spacing, making it difficult to achieve a full stereo.
In order to solve the above problems, Nippon Wireless has developed a button interface electronic volume controller NJU7392 with built-in eala Stereo Expander function.
ã€product Overview】
The NJU7392 has built-in 2 system input selection function, eala Stereo Expander function (which can support narrow pitch speakers and adjust sound field function), electronic volume control of push-button interface, and bass enhancement with limiter. A standby function is also available to reduce the power consumption of the device.
Feature 1 eliminates the need for microprocessor control and reduces equipment costs.
An electronic volume control with a push-button interface controls the mode switching of POWER ON/OFF, eala Stereo Expander ON/OFF, Bass Boost ON/OFF. Since various mode switching does not require microprocessor control, there is no need to develop software, which contributes to reducing development costs.
Feature 2 Elia Stereo Expander is equipped to enhance the stereo sense of the new Japanese wireless eala Stereo Expander function (which can support narrow pitch speakers and adjust the sound field function), even for narrow speakers, it can be more spacious. Stereo sense, not limited by speaker configuration. Contributed to improving the spatial sound effect of stereo sound.
Feature 3 Through the output indicators, the LED display is possible.
The output indicators of POWER ON/OFF, eala Stereo Expander ON/OFF, and Bass Boost ON/OFF are available. When the mode is switched, the LED will light up.
ã€application】
・For portable audio, for portable game consoles, and active speakers
ã€Product Features】
・Key electronic volume control 0 to -68dB, MUTE
・Corresponding pitch narrow speaker, sound field adjustment function (eala Stereo Expander)
・Working power supply voltage +2.7 to +5.5V
・Low current consumption 5mA typ. (in working mode)
1μAtyp. (in standby mode)
・Low output noise voltage 20μVrms typ. (when eala Stereo Expander ON)
・Input selector 2 system (single-ended signal input / quasi-differential input)
・Bass Boost (Enhanced Bass) function with built-in limiter ・CMOS structure and package SSOP32 (11.0×7.6×1.25mm typ.)
[production plan / sample price]
・Sample supply has been started since September 2009. Production plan is expected to be 500,000 monthly production from October 2009. Sample price @¥300
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