Audio amplifier reduces power consumption by 90%
A 4-channel, high-efficiency class-AB linear power amplifier IC has been developed by Toshiba Electronics Europe that delivers high-quality sound reproduction for car audio applications while significantly reducing power consumption. Offering efficiency comparable to class-D digital amplifiers, the TCB701FNG IC uses patented technology to operate at just ten percent of the power of conventional class-AB amplifiers (under normal operating conditions: 0.5-4W).
BoM cost is around half that of more expensive Class-D alternatives as no EMI or low-pass filtering is required.
As well as efficient, low-noise operation, the TCB701FNG incorporates an extended set of self-diagnosis capabilities that can monitor and report various error states via the I2C bus.
These capabilities include full-time fault detection of output DC offset. This prevents speaker burnout and improves overall reliability.
Additional functionality includes anti high-frequency noise, protection against output cross connection and over- and under-voltage, three levels of over-temperature detection, standby/mute control and GSM noise suppression.
Toshiba’s new IC is supplied in a 36-pin HSSOP package and can be used in both power amplifier and line drive mode.
The device can operate with a supply voltage of 6-18V, supports 49W x4 channels, and is compatible with speakers rated to 2Ω. Output noise voltage is 60µVrms.
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