Toshiba power amp suits car audio

Toshiba TCB702FNG four-channel linear power amplifier

Toshiba Electronics has launched a four-channel high-efficiency linear power amplifier for in-vehicle audio applications.

The TCB702FNG can be used as a power amplifier or line output amplifier, delivering a maximum output power of 45W into a 4Ω load. High fidelity output is achieved through a total harmonic distortion (THD) of 0.02% with output noise levels as low as 60μVrms.

The amplifier is housed in a 36-pin hssop and is pin-compatible with the company’s TCB701FNG high efficiency 50W linear power amplifier, offering flexibility to designers.

In developing the device, Toshiba has improved its technology to realise efficiency levels that are comparable with a digital high-efficiency, class D amplifier across the operating range of 0.5 to 4W. As a result, the power consumption of the device is reduced by up to a claimed eighty per cent when compared with a typical class AB amplifier.

The amplifier includes a self-diagnosis function with I2C bus control that can diagnose errors such as crossed output connections. It also includes full-time error detection of any output DC offset voltage, which can quickly detect abnormal output offset voltages and prevent speaker burnout, improving system reliability. Other inbuilt protections include over voltage and low voltage.

Supporting 6V operation ensures it is compatible with vehicles that have idling reduction system as well as supressing popping sounds due to fluctuating supply voltages.

Sample shipments have started with mass production scheduled to begin early next year.

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